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Published online by Cambridge University Press:  04 February 2011

R. Norman Owen-Smith
Affiliation:
University of the Witwatersrand, Johannesburg
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Adaptive Herbivore Ecology
From Resources to Populations in Variable Environments
, pp. 346 - 370
Publisher: Cambridge University Press
Print publication year: 2002

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References

Abrams, P. A. 1994. The fallacies of “ratio dependent” predation. Ecology 75: 1842–50CrossRefGoogle Scholar
Abrams, P. 1997. Anomalous predictions of ratio-dependent models of predation. Oikos 80: 163–71CrossRefGoogle Scholar
Abrams, P. A. & Ginzburg, L. R.. 2000. The nature of predation: prey dependent, ratio dependent or neither. Trends Ecol. Evol. 15: 337–41CrossRefGoogle ScholarPubMed
Adamczewski, J. Z., Gates, C. C., Hudson, R. J. & Price, M. A.. 1987. Seasonal changes in body composition of mature female caribou and their calves on an Arctic island with limited winter resources. Can. J. Zool. 65: 1149–57CrossRefGoogle Scholar
Adamczewski, J. Z., Hudson, R. J. & Gates, C. C.. 1993. Winter energy balance and activity of female caribou on Coats Island, Northwest Territories: the relative importance of foraging and body reserves. Can. J. Zool. 71: 1221–9CrossRefGoogle Scholar
Akcakaya, H. R. 1992. Population cycles of mammals: evidence for ratio-dependent predation hypothesis. Ecol. Monogr. 62: 119–42CrossRefGoogle Scholar
Akcakaya, H. R., Arditi, R. & Ginzburg, L. R.. 1995. Ratio-dependent predation: an abstraction that works. Ecology 76: 995–1004CrossRefGoogle Scholar
Alexander, R. McN. 1991. Optimization of gut structure and diet for higher vertebrate herbivores. Phil. Trans. R. Soc. Lond. B. 333: 249–55CrossRefGoogle ScholarPubMed
Allden, W. G. & Whittaker, I. A. D. McD.. 1970. Determinants of herbage intake by grazing sheep: the interrelationships of factors influencing herbage intake and availability. Aust. J. Agric. Res. 21: 755–66CrossRefGoogle Scholar
Allen-Rowlandson, T. S. 1980. The social and spatial organisation of the greater kudu in the Andries Vosloo Kudu Reserve, Eastern Cape. MSc thesis, Rhodes University
Anderson, E. W. & Scherzinger, R. J.. 1975. Improving quality of winter forage for elk by cattle grazing. J. Range Mgmt 28: 120–5CrossRefGoogle Scholar
Andrew, M. H. 1988. Grazing impact in relation to livestock watering points. Trends Ecol. Evol. 3: 336–9CrossRefGoogle ScholarPubMed
Arditi, R & Dacorogna, B.. 1988. Optimal foraging on arbitrary patch distributions and the definition of habitat patches. Am. Nat. 131: 837–46CrossRefGoogle Scholar
Arditi, R. & Ginzburg, L. R.. 1989. Coupling in predator-prey dynamics: ratio dependence. J. Theor. Biol. 139: 311–26CrossRefGoogle Scholar
Ash, A. J., McIvor, J. G., Corfield, J. P. & Winter, W. H.. 1996. How land condition alters plant-animal relationships in Australia's tropical rangelands. Agric. Ecosyst. Environ. 56: 77–92CrossRefGoogle Scholar
Astrom, A., Lundberg, P. & Danell, K.. 1990. Partial prey consumption by browsers: trees as patches. J. Anim. Ecol. 59: 287–300CrossRefGoogle Scholar
Baile, C. A. & Forbes, J. M.. 1974. Control of feed intake and regulation of energy balance in ruminants. Physiol. Rev. 54: 160–216CrossRefGoogle ScholarPubMed
Bailey, D. W., Gross, J. E., Laca, E. A., Rittenhouse, L. R., Coughenour, M. B., Swift, D. M. & Sims, P. L.. 1996. Mechanisms that result in large herbivore grazing distribution patterns. J. Range Mgmt 49: 386–400CrossRefGoogle Scholar
Bailey, D. W., Walker, J. W. & Rittenhouse, L. R.. 1990. Sequential analysis of cattle location: day to day movement patterns. Appl. Anim. Behav. Sci. 25: 137–48CrossRefGoogle Scholar
Baker, D. L. & Hobbs, N. T.. 1987. Strategies of digestion: digestive efficiency and retention time of forage diets in montane ungulates. Can. J. Zool. 65: 1978–84CrossRefGoogle Scholar
Bartmann, R. M., G. C. White & L. H. Carpenter. 1992. Compensatory mortality in a Colorado mule deer population. Wildl. Monogr. No. 121, 39pp
Bednekoff, P. A. & Houston, A. I.. 1994. Optimizing fat reserves over the entire winter: a dynamic model. Oikos 71: 408–15CrossRefGoogle Scholar
Begon, M., J. Harper & C. Townsend. 1996. Ecology: Individuals, Populations and Communities, 3rd edition. Blackwell, Oxford
Behnke, R. H., I. Scoones & C. Kerven (eds). 1993. Range Ecology at Disequilibrium. ODI Publications, London
Bell, R. H. V. 1970. The use of the herb layer by grazing ungulates in the Serengeti. In Animal Populations in Relation to their Food Resources, ed. A. Watson (Symp. Brit. Ecol. Soc.), pp. 111–24. Blackwell, Oxford
Bell, R. H. V. 1971. A grazing ecosystem in the Serengeti. Scient. Am. 225: 86–93CrossRefGoogle Scholar
Bellows, T. S. 1981. The descriptive properties of some models for density dependence. J. Anim. Ecol. 50: 139–56CrossRefGoogle Scholar
Belovsky, G. E. 1978. Diet optimization in a generalist herbivore: the moose. Theor. Popul. Biol. 14: 105–34CrossRefGoogle Scholar
Belovsky, G. E. 1984. Herbivore optimal foraging: a comparative test of three models. Am. Nat. 124: 97–115CrossRefGoogle Scholar
Belovsky, G. E. 1986. Optimal foraging and community structure: implications for a guild of generalist grassland herbivores. Oecologia 70: 35–52CrossRefGoogle ScholarPubMed
Belovsky, G. E. 1990. How important are nutrient constraints in optimal foraging models or are spatial/temporal factors more important? In Behavioral Mechanisms of Food Selection, ed. R. N. Hughes, pp. 255–80. Springer-Verlag, Berlin and Heidelberg
Belovsky, G. E. 1994. How good must models and data be in ecology?Oecologia 100: 475–80CrossRefGoogle ScholarPubMed
Belovsky, G. E. & Schmitz, O. J.. 1993. Owen-Smith's evaluation of herbivore foraging models: what is constraining?Evol. Ecol. 7: 525–9CrossRefGoogle Scholar
Belovsky, G. E. & Slade, J. B.. 1986. Time budgets of grassland herbivores: body size similarities. Oecologia 70: 53–62CrossRefGoogle ScholarPubMed
Bergman, C. M., Fryxell, J. M. & Gates, C. C.. 2000. The effect of tissue complexity and sward height on the functional response of Wood Bison. Funct. Ecol. 14: 61–9CrossRefGoogle Scholar
Berryman, A. A. 1992. The origins and evolution of predator-prey theory. Ecology 73: 1530–5CrossRefGoogle Scholar
Berryman, A. A. 1999. Alternative perspectives on consumer-resource dynamics: a reply to Ginzburg. J. Anim. Ecol. 68: 1263–6CrossRefGoogle Scholar
Berryman, A. A., Gutierrez, A. P. & Arditi, R.. 1995. Credible, parsimonious and useful predator-prey models — a reply to Abrams, Gleeson and Sarnelle. Ecology 76: 1980–5CrossRefGoogle Scholar
Boggs, C. L. 1992. Resource allocation: exploring connections between foraging and life history. Funct. Ecol. 6: 508–18CrossRefGoogle Scholar
Boomker, E. A. 1987. Fermentation and digestion in the kudu. PhD thesis, University of Pretoria
Borner, M., FitzGibbon, C. D., Borner, M., Caro, T. M., Lindsay, W. K., Collins, D. A. & Holt, M. E.. 1987. The decline of the Serengeti Thomson's gazelle population. Oecologia 73: 32–40CrossRefGoogle ScholarPubMed
Botkin, D. B. 1990. Discordant Harmonies. A New Ecology for the Twenty First Century. Oxford University Press, Oxford
Bradbury, J. W., Vehrencamp, S. L., Clifton, K. E. & Clifton, L. M.. 1996. The relationship between intake rate and local forage abundance in wild Thomson's gazelles. Ecology 77: 2237–55CrossRefGoogle Scholar
Brooks, P. M. & J. A. W. Macdonald. 1983. The Hluhluwe-Umfolozi Reserve: An ecological case history. In Management of Large Mammals in African Conservation Areas, ed. R. N. Owen-Smith, pp. 51–77. Haum, Pretoria
Brown, J. H., Marquet, P. A. & Taper, M. L.. 1993. Evolution of body size: consequences of an energetic definition of fitness. Am. Nat. 142: 573–84CrossRefGoogle Scholar
Burgman, M., S. Ferson & H. R. Akcakaya. 1992. Risk Assessment in Conservation Biology. Chapman & Hall, London
Burlison, A. J., Hodgson, J. & Illius, A. W.. 1991. Sward canopy structure and the bite dimensions and bite weight of grazing sheep. Grass Forage Sci. 46: 29–38CrossRefGoogle Scholar
Cahill, G. F. 1970. Starvation in man. New Engl. J. Med. 282: 668–75Google ScholarPubMed
Calder, W. A. III. 1984. Size, Function and Life History. Harvard University Press, Cambridge, MA
Campling, R. C. 1970. Physical regulation of voluntary intake. In Physiology of Digestion and Metabolism in the Ruminant, ed. A. J. Phillipson, pp. 226–34. Oriel Press, Newcastle
Case, T. J. 2000. An Illustrated Guide to Theoretical Ecology. Oxford University Press, Oxford
Caughley, G. 1970. Eruption of ungulate populations with emphasis on Himalayan Thar in New Zealand. Ecology 51: 53–72CrossRefGoogle Scholar
Caughley, G. 1976a. Plant-herbivore systems. In Theoretical Ecology, ed. R. M. May, pp. 94–113. Blackwell, Oxford
Caughley, G. 1976b. Wildlife management and the dynamics of ungulate populations. In Advances in Applied Biology, Vol. 1, ed. T. H. Coaker, pp. 183–245. Academic Press, London
Caughley, G. 1976c. The elephant problem — an alternative hypothesis. E. Afr. Wildl. J. 14: 265–83CrossRefGoogle Scholar
Caughley, G. 1982. Vegetation complexity and the dynamics of modelled grazing systems. Oecologia 54: 309–12CrossRefGoogle ScholarPubMed
Caughley, G. 1994. Directions in conservation biology. J. Anim. Ecol. 63: 215–44CrossRefGoogle Scholar
Caughley, G. & J. H. Lawton. 1981. Plant-herbivore systems. In Theoretical Ecology, 2nd edition, ed. R. M. May, pp. 132–66. Blackwell, Oxford
Caughley, G. & A. R. E. Sinclair. 1994. Wildlife Ecology and Management. Blackwell, Oxford
Chan-McLeod, A. C. A., White, R. G. & Holleman, D. F.. 1994. Effects of protein and energy intake, body condition, and season on nutrient partitioning and milk production in caribou and reindeer. Can. J. Zool. 72: 938–47CrossRefGoogle Scholar
Chapin, F. S.. 1980. The nutrition of wild plants. A. Rev. Ecol. Syst. 11: 233–60CrossRefGoogle Scholar
Charnov, E. L. 1976. Optimal foraging: attack strategy of a mantid. Am. Nat. 110: 141–51CrossRefGoogle Scholar
Clark, C. W. 1990. Mathematical Bioeconomics. The Optimal Management of Renewable Resources. 2nd edition. John Wiley, New York
Clark, C. W. 1993. Dynamic models of behavior: an extension of life history theory. Trends Ecol. Evol. 8: 205–9CrossRefGoogle ScholarPubMed
Clark, C. W. & M. Mangel. 1999. Dynamic State Variable Models in Ecology. Oxford University Press, Oxford
Clutton-Brock, T. H., Albon, S. D. & Guinness, F. E.. 1989. Fitness costs of gestation and lactation in wild mammals. Nature 337: 260–2CrossRefGoogle ScholarPubMed
Clutton-Brock, T. H., Illius, A. W., Wilson, K., Grenfell, B. T., MacColl, A. & Albon, S. D.. 1997. Stability and instability in ungulate populations: an empirical analysis. Am. Nat. 149: 196–219CrossRefGoogle Scholar
Clutton-Brock, T. H., Major, M. & Guinness, F. E.. 1985. Population regulation in male and female red deer. J. Anim. Ecol. 54: 831–46CrossRefGoogle Scholar
Clutton-Brock, T. H., Price, O. F., Albon, S. D. & Jewell, P. A.. 1991. Persistent instability and population regulation in Soay sheep. J. Anim. Ecol. 60: 593–608CrossRefGoogle Scholar
Coe, M. J., Cumming, D. H. M. & Phillipson, J.. 1976. Biomass and production of large herbivores in relation to rainfall and primary production. Oecologia 22: 341–54CrossRefGoogle ScholarPubMed
Coley, P. D. & Barone, J. A.. 1996. Herbivory and plant defenses in tropical forests. A. Rev. Ecol. Syst. 27: 305–35CrossRefGoogle Scholar
Coley, P. D., Bryant, J. P. & Chapin, F. S.. 1985. Resource availability and plant anti-herbivore defense. Science 230: 895–9CrossRefGoogle Scholar
Cooper, S. M. 1985. Factors influencing the utilization of woody plants and forbs by ungulates. PhD thesis, University of the Witwatersrand
Cooper, S. M. 1990. The hunting behaviour of spotted hyenas in a region containing both sedentary and migratory prey. Afr. J. Ecol. 28: 131–41CrossRefGoogle Scholar
Cooper, S. M. & Owen-Smith, N.. 1986. Effects of plant spinescence on large mammalian herbivores. Oecologia 68: 446–55CrossRefGoogle ScholarPubMed
Cooper, S. M., Owen-Smith, N. & Bryant, J. P.. 1988. Foliage acceptability to browsing ruminants in relation to seasonal changes in the leaf chemistry of woody plants in a South Africa savanna. Oecologia 75: 336–42CrossRefGoogle Scholar
Coppock, D. L., Swift, D. M., Ellis, J. E. & Galvin, K.. 1986. Seasonal patterns of energy allocation to basal metabolism, activity and production for livestock in a nomadic pastoral ecosystem. J. Agric. Sci., Camb. 107: 357–65CrossRefGoogle Scholar
Coughenour, M. B. 1991. Spatial components of plant herbivore interactions in pastoral, ranching and natural ungulate ecosystems. J. Range Mgmt 44: 530–42CrossRefGoogle Scholar
Coughenour, M. B. & Singer, F. J.. 1996. Elk population processes in Yellowstone National Park under the policy of natural regulation. Ecol. Appl. 6: 573–93CrossRefGoogle Scholar
Crawley, M. J. 1983. Herbivory: The Dynamics of Animal-Plant Interactions. (Studies in Ecology Series No. 10.) Blackwell, Oxford
Danckwerts, J. E., Aucamp, A. J. & Barnard, H. J.. 1983. Herbaceous species preference by cattle in the false thornveld of eastern Cape. Proc. Grass. Soc. Sth. Afr. 18: 89–94Google Scholar
Dean, W. R. J. & Macdonald, I. A. W.. 1994. Historical changes in stocking rates of domestic livestock as a measure of semi-arid and arid rangeland degradation in the Cape Province, South Africa. J. Arid Envir. 26: 281–98CrossRefGoogle Scholar
DeAngelis, D. L. 1992. Dynamics of Nutrient Cycling and Food Webs. Chapman & Hall, London
DeAngelis, D. L., Goldstein, R. A. & O'Neil, R. V.. 1975. A model for trophic interaction. Ecology 56: 881–92CrossRefGoogle Scholar
DeAngelis, D. L. & L. J. Gross (eds). 1992. Individual-Based Models and Approaches in Ecology. Chapman & Hall, London
Detling, J. K., Parton, W. J. & Hunt, H. W.. 1979. A simulation model of Bouteloua gracilis biomass dynamics on the North American shortgrass prairie. Oecologia 38: 167–91CrossRefGoogle ScholarPubMed
de Vos, V., R. C. Bengis & H. J. Coetzee. 1983. Population control of large mammals in the Kruger National Park. In Management of Large Mammals in African Conservation Areas, ed. R. N. Owen-Smith, pp. 213–31. Haum, Pretoria
Dinius, D. A. & Baumgardt, B. R.. 1970. Regulation of food intake in ruminants: 6. Influence of caloric density of pelleted rations. J. Dairy Sci. 53: 311–16CrossRefGoogle Scholar
Distel, R. A., Laca, E. A., Griggs, T. C. & Demment, M. W.. 1995. Patch selection by cattle: maximization of intake rate in horizontally heterogeneous pastures. Appl. Anim. Behav. Sci. 45: 11–21CrossRefGoogle Scholar
Duncan, P. 1975. Topi and their food supply. PhD thesis, University of Nairobi
Duncan, P., Foose, T. J., Gordon, I. J., Gakahu, C. G. & Lloyd, M.. 1990. Comparative nutrient extraction from forages by bovids and equids: a test of the nutritional model of equid/bovid competition and coexistence. Oecologia 84: 411–18CrossRefGoogle ScholarPubMed
Dunham, K. M. 1982. The foraging behaviour of impala. S. Afr. J. Wildl. Res. 12: 36–40Google Scholar
Dunham, K. M. & Murray, M. G.. 1982. The fat reserves of impala. Afr. J. Ecol. 20: 81–7CrossRefGoogle Scholar
du Toit, J. T. 1988. Patterns of resource use within the browsing ruminant guild in the central Kruger National Park. PhD thesis, University of the Witwatersrand
Toit, J. T. & Owen-Smith, N.. 1989. Body size, population metabolism and habitat specialization among African large herbivores. Am. Nat. 133: 736–40CrossRefGoogle Scholar
Dyer, M. I., Turner, C. L. & Seastedt, T. R.. 1993. Herbivory and its consequences. Ecol. Applic. 3: 10–16CrossRefGoogle ScholarPubMed
Edwards, G. R., Parsons, A. J., Penning, P. D. & Newman, J. A.. 1995. Relationship between vegetation state and bite dimensions of sheep grazing contrasting plant species and its implications for intake rate and diet selection. Grass Forage Sci. 50: 378–88CrossRefGoogle Scholar
Ellis, J. E., & Swift, D. M.. 1988. Stability of African pastoral ecosystems: alternative paradigms and implications for development. J. Range Mgmt 41: 450–9CrossRefGoogle Scholar
Elser, J. J., Sterner, R. W., Gorokhova, E., Fagan, W. F., Markow, T. A., Cotner, J. B., Harrison, J. F., Hobbie, S. E., Odell, G. M. & Weides, L. J.. 2000. Biological stoichiometry from genes to ecosystems. Ecol. Lett. 3: 540–50CrossRefGoogle Scholar
Elton, C. 1927. Animal Ecology. Sidgwick & Jackson, London
Eltringham, S. K. 1974. Changes in the large mammal community of Mweya Peninsula, Rwenzori National Park, following removal of hippopotamus. J. Appl. Ecol. 11: 855–65CrossRefGoogle Scholar
Eltringham, S. K. 1980. A quantitative assessment of range usage by large African mammals with particular reference to the effects of elephants on trees. Afr. J. Ecol. 18: 53–71CrossRefGoogle Scholar
Farnsworth, K. D. & Illius, A. W.. 1996. Large grazers back in the fold: generalizing the prey model to incorporate mammalian herbivores. Funct. Ecol. 10: 678–80Google Scholar
Farnsworth, K. D. & Illius, A. W.. 1998. Optimal diet choice for large herbivores: an extended contingency model. Funct. Ecol. 12: 74–81CrossRefGoogle Scholar
Ferrar, A. A. & Walker, B. H.. 1974. An analysis of herbivore/habitat relationships in Kyle National Park, Rhodesia. J. S. Afr. Wildl. Mgmt Ass. 4: 137–47Google Scholar
Finch, V. A. 1972. Thermoregulation and heat balance of the East African eland and hartebeest. Am. J. Physiol. 222: 1374–9Google ScholarPubMed
FitzGibbon, C. D. & Fanshawe, J. H.. 1988. Stotting in Thomson's gazelles: an honest signal of condition. Behav. Ecol. Sociobiol. 23: 69–74CrossRefGoogle Scholar
Forbes, T. D. A. 1988. Researching the plant-animal interface: the investigation of ingestive behaviour in grazing animals. J. Anim. Sci. 66: 2369–79CrossRefGoogle ScholarPubMed
Fowler, C. W. 1981. Density dependence as related to life history strategy. Ecology 62: 602–10CrossRefGoogle Scholar
Fowler, C. W. 1987. A review of density dependence in populations of large mammals. In Current Mammalogy, Vol. 1, ed. H. H. Genoways, pp. 401–41. Plenum Press, New York
Freeland, W. J. & Janzen, D. H.. 1974. Strategies in herbivory by mammals: the role of plant secondary compounds. Am. Nat. 108: 269–89CrossRefGoogle Scholar
Fretwell, S. D. 1972. Populations in a Seasonal Environment. Princeton University Press, Princeton, NJ
Fritz, H. & Garine-Witchatitsky, M.. 1996. Foraging in a social antelope: effects of group size on foraging choices and resource perception in impala. J. Anim. Ecol. 65: 736–42CrossRefGoogle Scholar
Fritz, H., Garine-Witchatitsky, M. & Letessier, G.. 1996. Habitat use by sympatric wild and domestic herbivores in an African savanna woodland: the influence of cattle spatial behaviour. J. Appl. Ecol. 33: 589–98CrossRefGoogle Scholar
Fritz, H. & Duncan, P.. 1994. On the carrying capacity for large ungulates of African savanna ecosystems. Proc. R. Soc. Lond. B 256: 77–82CrossRefGoogle ScholarPubMed
Fryxell, J. M. 1991. Forage quality and aggregation by large herbivores. Am. Nat. 138: 478–98CrossRefGoogle Scholar
Fryxell, J. M., Greever, J. & Sinclair, A. R. E.. 1988. Why are migratory ungulates so abundant?Am. Nat. 131: 781–98CrossRefGoogle Scholar
Fryxell, J. M. & Lundberg, P.. 1994. Diet choice and predator prey dynamics. Evol. Ecol. 8: 407–21CrossRefGoogle Scholar
Fryxell, J. M. & P. Lundberg. 1998. Individual Behavior and Community Dynamics. Chapman & Hall, London
Futuyma, D. J. 1979. Evolutionary Biology. Sinauer Associates, Sunderland, MA
Gaillard, J. M., Festa-Bianchet, M., Yoccoz, N. G. & Loison, A.. 2000. Temporal variation in vital rates and population dynamics of large herbivores. A. Rev. Ecol. Syst. 31: 367–93CrossRefGoogle Scholar
Gallivan, G. I., Culverwell, J. & Girdwood, R.. 1995. Body condition indices of impala: effect of age class, sex, season and management. S. Afr. J. Wildl. Res. 25: 23–31Google Scholar
Garten, C. T. Jr., 1978. Multivariate perspectives on the ecology of plant mineral element composition. Am. Nat. 112: 533–44CrossRefGoogle Scholar
Geist, V. 1974. On the relationship of social evolution and ecology in ungulates. Am. Zool. 14: 205–20CrossRefGoogle Scholar
Gerhart, K. L., White, R. G., Cameron, R. D. & Russell, D. E.. 1996. Body composition and nutrient reserves of arctic caribou. Can. J. Zool. 74: 136–46CrossRefGoogle Scholar
Getz, W. M. 1984. Population dynamics: a per-capita resource approach. J. Theor. Biol. 108: 623–43CrossRefGoogle Scholar
Getz, W. M. 1991. A unified approach to multispecies modelling. Natur. Res. Model. 5: 393–421CrossRefGoogle Scholar
Getz, W. M. 1993. Metaphysiological and evolutionary dynamics of populations exploiting constant and interactive resources: r-K selection revisited. Evol. Ecol. 7: 287–305CrossRefGoogle Scholar
Getz, W. M. 1994. A metaphysiological approach to modelling ecological populations and communities. In Frontiers in Mathematical Biology, ed. S. A. Levin, pp. 411–42. Springer-Verlag, Berlin
Getz, W. M. & Owen-Smith, N.. 1999. A metaphysiological population model of storage in variable environments. Natur. Res. Model. 12: 197–230CrossRefGoogle Scholar
Giesecke, D. & Gylswyk, N. O.. 1975. A study of feeding types and certain rumen functions in six species of South African wild ruminants. J. Agric. Sci., Camb. 85: 75–83CrossRefGoogle Scholar
Gillard, P. & Monypenny, R.. 1990. A decision support model to evaluate the effects of drought and stocking rate on beef cattle properties in Northern Australia. Agric. Syst. 34: 37–52CrossRefGoogle Scholar
Gillingham, M. P., Parker, K. L. & Hanley, T. A.. 1997. Forage intake by black tailed deer in a natural environment: bout dynamics. Can. J. Zool. 75: 1118–28CrossRefGoogle Scholar
Ginnett, T. F., Dankosky, J. A., Deo, G. & Demment, M. W.. 1999. Patch depression in grazers: the roles of biomass distribution and residual stems. Funct. Ecol. 13: 37–44CrossRefGoogle Scholar
Ginnett, T. F. & Demment, M. W.. 1995. The functional response of herbivores: analysis and test of a simple mechanistic model. Funct. Ecol. 9: 376–84CrossRefGoogle Scholar
Ginnett, T. F. & Demment, M. W.. 1997. Sex differences in giraffe foraging behaviour at two scales. Oecologia 110: 291–300CrossRefGoogle Scholar
Ginzburg, L. R. 1998. Assuming reproduction to be a function of consumption raises doubts about some popular predator-prey models. J. Anim. Ecol. 67: 325–7CrossRefGoogle Scholar
Gleeson, S. K. 1995. Density dependence is better than ratio dependence. Ecology 75: 1834–5CrossRefGoogle Scholar
Goddard, J. 1968. Food preferences of two black rhinoceros populations. E. Afr. Wildl. J. 6: 1–18CrossRefGoogle Scholar
Gordon, I. J. 1988. Facilitation of red deer grazing by cattle and its impact on red deer performance. J. Appl. Ecol. 25: 1–10CrossRefGoogle Scholar
Gordon, I. J. & Illius, A. W.. 1988. Incisor arcade structure and diet selection in ruminants. Funct. Ecol. 2: 15–22CrossRefGoogle Scholar
Gordon, I. J. & Illius, A. W.. 1994. The functional significance of the browser-grazer dichotomy in African ruminants. Oecologia 98: 167–75CrossRefGoogle ScholarPubMed
Gotelli, N. J. 1995. A Primer of Ecology. Sinauer, Sunderland, MA
Greenwood, G. B. & Demment, M. W.. 1988. The effect of fasting on short-term cattle grazing behaviour. Grass Forage Sci. 43: 377–86CrossRefGoogle Scholar
Grenfell, B. T. 1992. Parasitism and the dynamics of grazing systems. Am. Nat. 139: 907–29CrossRefGoogle Scholar
Grenfell, B. T., Price, O. F., Albon, S. D. & Clutton-Brock, T. H.. 1992. Overcompensation and population cycles in an ungulate. Nature 355: 823–6CrossRefGoogle Scholar
Grenfell, B. T., Wilson, K., Finkenstadt, B. F., Coulson, T. N., Murray, S., Albon, S. D., Pemberton, J. M., Clutton-Brock, T. H. & Crawley, M. J.. 1998. Noise and determinism in synchronized sheep dynamics. Nature 394: 674–7CrossRefGoogle Scholar
Grime, J. P. 1977. Evidence for the existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am. Nat. 111: 1169–94CrossRefGoogle Scholar
Gross, J. E., Alkon, O. V. & Demment, M. W.. 1996. Nutritional ecology of dimorphic herbivores: digestion and passage rates in Nubian ibex. Oecologia 102: 170–8CrossRefGoogle Scholar
Grossman, D., P. L. Holden & R. F. H. Collinson. 1999. Veld management on the game ranch. In Veld Management in South Africa, ed. N. M. Tainton, pp. 261–79. University of Natal Press, Pietermaritzburg
Grunow, J. O., Groeneveld, H. T. & Toit, H. C.. 1980. Above ground dry matter dynamics of the grass layer in the Nylsvley tree savanna. J. Ecol. 68: 877–89CrossRefGoogle Scholar
Gulland, F. M. D. 1992. Role of nematode infections in mortality of Soay sheep during a population crash on St. Kilda. Parasitology 105: 493–503CrossRefGoogle Scholar
Gurney, W. S. C. & R. M. Nisbet. 1998. Ecological Dynamics. Oxford University Press, Oxford
Gustafson, L. L., Franklin, W. L., Sarno, R. J., Hunter, R. L., Young, K. M., Johnson, W. E. & Behl, M. J.. 1998. Predicting early mortality of newborn guanaco by birth mass and haematological parameters: a provisional model. J. Wildl. Mgmt 62: 24–35CrossRefGoogle Scholar
Hagerman, A. E., Robbins, C. T., Weerasuriya, Y., Wilson, T. C. & McArthur, C.. 1992. Tannin chemistry in relation to digestion. J. Range Mgmt 45: 57–62CrossRefGoogle Scholar
Hairston, N. G., Smith, F. E. & Slobodkin, L. B.. 1960. Community structure, population control and competition. Am. Nat. 94: 421–5CrossRefGoogle Scholar
Hamilton, E. W., Giovannini, M. S., Moses, S. A., Coleman, J. S. & McNaughton, S. J.. 1998. Biomass and mineral element responses of a Serengeti short-grass species to nitrogen supply and defoliation: compensation requires a critical [N]. Oecologia 116: 407–18CrossRefGoogle Scholar
Hammond, K. A. & Diamond, J.. 1997. Maximal sustained energy budgets in humans and animals. Nature 386: 457–62CrossRefGoogle ScholarPubMed
Hanley, T. A. 1997. A nutritional view of understanding and complexity in the problem of diet selection by deer (Cervidae). Oikos 79: 209–18CrossRefGoogle Scholar
Hanski, J. 1989. Metapopulation dynamics: does it help to have more of the same?Trends Ecol. Evol. 4: 113–14CrossRefGoogle ScholarPubMed
Hanski, J. 1999. Metapopulation Ecology. Oxford University Press
Hanson, J. D., Parton, W. J. & Innis, G. S.. 1985. Plant growth and production of grassland ecosystems: a comparison of modelling approaches. Ecol. Model. 29: 131–44CrossRefGoogle Scholar
Hansson, L., L. Fahrig & G. Merriam (eds). 1995. Mosaic Landscapes and Ecological Processes. Chapman & Hall, London
Hardy, M. B., C. R. Hurt & O. J. H. Bosch. 1999. Veld condition assessment. Grassveld. In Veld Management in South Africa, ed. N. M. Tainton, pp. 194–206. University of Natal Press, Pietermaritzburg
Harper, J. L. 1977. Population Biology of Plants. Academic Press, London and New York
Hassell, M. P., Lawton, J. H. & May, R. M.. 1976. Patterns of dynamical behaviour in single-species populations. J. Anim. Ecol. 45: 471–86CrossRefGoogle Scholar
Hastings, A. 1997. Population Biology. Concepts and Models. Springer-Verlag, New York
Hatch, G. P. & Stafford Smith, D. M.. 1997. The bioeconomic implications of various drought management strategies for a communal cattle herd in a semi-arid savanna of KwaZulu-Natal. Afr. J. Range Forage Sci. 14: 17–25CrossRefGoogle Scholar
Heady, H. F. & R. D. Child. 1994. Rangeland Ecology and Management. Westview Press, Boulder, CO
Heitschmidt, R. K. & J. W. Stuth (eds). 1991. Grazing Management: An Ecological Perspective. Timber Press, Portland, OR
Herbers, J. M. 1981. Time resources and laziness in animals. Oecologia 49: 252–62CrossRefGoogle ScholarPubMed
Hewison, A. J. M., Angibault, J. M., Boutin, J., Bideau, E., Vincent, J. P. & Sempere, A.. 1996. Annual variation in body composition of roe deer in moderate environmental conditions. Can. J. Zool. 74: 245–53CrossRefGoogle Scholar
Hik, D. S. 1995. Does risk of predation influence population dynamics? Evidence from the cyclic decline of snowshoe hares. Wildl. Res. 22: 115–29CrossRefGoogle Scholar
Hirakawa, H. 1997. Digestion — constrained optimal foraging in generalist mammalian herbivores. Oikos 78: 37–47CrossRefGoogle Scholar
Hobbs, N. T. 1990. Diet selection by generalist herbivores: a test of the linear programming model. In Behavioural Mechanisms of Food Selection, ed. R. N. Hughes, pp. 395–413. Springer-Verlag, Heidelberg
Hobbs, N. T., Baker, D. L., Bear, G. D. & Bowden, D. C.. 1996a. Ungulate grazing in sagebrush grassland: mechanisms of resource competition. Ecol. Applic. 6: 200–17CrossRefGoogle Scholar
Hobbs, N. T., Baker, D. L., Bear, G. D. & Bowden, D. C.. 1996b. Ungulate grazing in sagebrush grassland: effects of resource competition on secondary production. Ecol. Applic. 6: 218–27CrossRefGoogle Scholar
Hodgson, J. & A. W. Illius. 1996. The Ecology and Management of Grazing Systems. CAB International, Wallingford
Hofmann, R. R. 1973. The Ruminant Stomach. (East Afr. Monogr. Biol. Vol. 2.) East African Literature Bureau, Nairobi
Hofmann, R. R. 1989. Evolutionary steps of ecophysiological adaptation and diversification of ruminants: A comparative review of their digestive system. Oecologia 78: 443–57CrossRefGoogle ScholarPubMed
Holland, O. 1992. Seasonal variation in body composition of European roe deer. Can. J. Zool. 70: 502–4CrossRefGoogle Scholar
Holling, C. S. 1959. Some characteristics of simple types of predation and parasitism. Can. Entomol. 91: 385–98CrossRefGoogle Scholar
Holling, C. S. 1965. The functional response of predators to prey density and its role in mimicry and population regulation. Mem. Entomol. Soc. Can. 45: 1–60Google Scholar
Houston, A. J. & J. M. McNamara. 1999. Models of Adaptive Behaviour. An Approach Based on State. Cambridge University Press, Cambridge
Houston, A. J., Welton, N. J. & McNamara, J. M.. 1997. Acquisition and maintenance costs in the long-term regulation of avian fat reserves. Oikos 78: 331–40CrossRefGoogle Scholar
Hudson, R. J. & Frank, S.. 1987. Foraging ecology of bison in aspen boreal habitats. J. Range Mgmt 40: 71–5CrossRefGoogle Scholar
Hudson, R. J. & Watkins, W. G.. 1986. Foraging rates of wapiti on green and cured pastures. Can. J. Zool. 64: 1705–8CrossRefGoogle Scholar
Huff, D. E. & Varley, J. D.. 1999. Natural regulation in Yellowstone National Park's northern range. Ecol. Applic. 9: 17–29Google Scholar
Hungate, R. E. 1975. The rumen microbial ecosystem. A. Rev. Ecol. Syst. 6: 39–66CrossRefGoogle Scholar
Hunter, M. D., T. Ohgushi & P. W. Price. 1992. Effects of Resource Distribution on Animal-Plant Interactions. Academic Press, London and New York
Hunter, M. D. & Price, P. W.. 1992. Playing chutes and ladders: heterogeneity and the relative roles of bottom-up and top-down forces in natural communities. Ecology 73: 724–32Google Scholar
Hutchinson, G. E. 1958. Concluding remarks. Cold Spring Harbor Symp. Quant. Biol. 22: 415–27CrossRefGoogle Scholar
Hutchinson, G. E. 1959. Homage to Santa Rosalia, or why are there so many kinds of animals?Am. Nat. 93: 145–59CrossRefGoogle Scholar
Illius, A. W. & Gordon, I. J.. 1987. The allometry of food intake in grazing ruminants. J. Anim. Ecol. 56: 989–99CrossRefGoogle Scholar
Illius, A. W. & Gordon, I. J.. 1991. Prediction of intake and digestion in ruminants by a model of rumen kinetics integrating animal size and plant characteristics. J. Agric. Sci., Cambr. 116: 145–57CrossRefGoogle Scholar
Illius, A. W. & Gordon, I. J.. 1992. Modelling the nutritional ecology of ungulate herbivores: evolution of body size and competitive ability. Oecologia 89: 428–34CrossRefGoogle Scholar
Illius, A. W. & I. J. Gordon. 1998. Scaling up from functional response to numerical response in vertebrate herbivores. In Herbivores, Plants and Predators, ed. H. Olff, V. K. Brown & R. T. Drent, pp. 397–427. Blackwell Science, Oxford
Illius, A. W., Gordon, I. J., Elston, D. A. & Milne, J. D.. 1999. Diet selection in goats: a test of intake-rate maximization. Ecology 80: 1008–18CrossRefGoogle Scholar
Illius, A. W. & Jessop, N. S.. 1995. Modelling metabolic costs of allelochemical ingestion by foraging ungulates. J. Chem. Ecol. 21: 693–719CrossRefGoogle Scholar
Illius, A. W. & Jessop, N. S.. 1996. Metabolic constraints on voluntary intake in ruminants. J. Anim. Sci. 74: 3052–62CrossRefGoogle ScholarPubMed
Illius, A. W. & O'Connor, T. G.. 1999. On the relevance of nonequilibrium concepts to arid and semi-arid grazing systems. Ecol. Applic. 9: 798–813CrossRefGoogle Scholar
Illius, A. W. & O'Connor, T. G.. 2000. Resource heterogeneity and ungulate population dynamics. Oikos 89: 283–94CrossRefGoogle Scholar
Irby, L. R. 1977. Food habits of Chandler's mountain reedbuck in a Rift Valley ranch. E. Afr. Wildl. J. 15: 289–94CrossRefGoogle Scholar
Ivlev, V. S. 1961. Experimental Ecology of the Feeding of Fishes. Yale University Press, New Haven, MA
James, C. D., Landsberg, J. & Morton, S. R.. 1999. Provision of watering points in the Australian Arid zone: a review of effects on biota. J. Arid Envir. 41: 87–121CrossRefGoogle Scholar
Janis, C. 1976. The evolutionary strategy of the Equidae and the origins of rumen and cecal digestion. Evolution 30: 757–76CrossRefGoogle ScholarPubMed
Jarman, P. J. 1971. Diets of large mammals in the woodlands around Lake Kariba. Oecologia 8: 157–78CrossRefGoogle ScholarPubMed
Jarman, P. J. 1974. The social organization of antelope in relation to their ecology. Behaviour 48: 215–67CrossRefGoogle Scholar
Jeschke, J. M., Kopp, M. & Tollrian, R.. 2001. Predator functional responses: discriminating between handling and digesting prey. Ecology. (In press.)Google Scholar
Jiang, Z. & Hudson, R. J.. 1992. Estimating forage intake and energy requirements of free-ranging wapiti. Can. J. Zool. 70: 675–79CrossRefGoogle Scholar
Jiang, Z. & Hudson, R. J.. 1993. Optimal grazing of wapiti on grassland: patch and feeding station departure rules. Evol. Ecol. 7: 488–98CrossRefGoogle Scholar
Jiang, Z. & Hudson, R. J.. 1994. Bite characteristics of wapiti in seasonal Bromus-Poa swards. J. Range Mgmt 47: 127–32CrossRefGoogle Scholar
Jones, R. J. & Sandland, R. L.. 1974. The relation between animal gain and stocking rate: derivation of the relation from the results of grazing trials. J. Agric. Sci., Cambr. 83: 335–41CrossRefGoogle Scholar
Joos-Vandewalle, M. E. 2000. Movement of migratory zebra and wildebeest in northern Botswana. PhD thesis, University of the Witwatersrand
Jorgenson, J. T., Festa-Bianchet, M., Gaillard, J.-M. & Wishart, W. D.. 1997. Effects of age, sex, disease and density on survival of bighorn sheep. Ecology 78: 1019–32CrossRefGoogle Scholar
Joubert, D. M. 1954. The influence of winter nutritional depressions on the growth, reproduction and production of cattle. J. Agric. Sci., Cambr. 44: 5–66CrossRefGoogle Scholar
Judson, O. P. 1994. The rise of the individual based model in ecology. Trends Ecol. Evol. 9: 9–14CrossRefGoogle ScholarPubMed
Kaufmann, S. A. 1993. The Origins of Order: Self-Organization and Selection in Evolution. Oxford University Press, Oxford
Kaufmann, S. A. 1995. At Home in the Universe. The Search for the Laws of Complexity. Oxford University Press, New York
Kemeny, J. G. & T. E. Kurtz. 1990. True BASIC. A Powerful Structured Language System by the Original Authors of BASIC. True BASIC Inc., West Lebanon, NH
Klein, D. R. 1968. The introduction, increase and crash of reindeer on St. Matthew Island. J. Wildl. Mgmt 32: 350–67CrossRefGoogle Scholar
Kooijman, S. A. L. M. 1990. Biomass conversion at the population level. In Individual-Based Models and Approaches in Ecology, ed. D. L. DeAngelis & L. J. Gross, pp. 338–58. Chapman & Hall, New York and London
Kooijman, S. A. L. M. 1993. Dynamic Energy Budgets in Biological Systems. Cambridge University Press, Cambridge
Krebs, J. R. & R. H. McLeery. 1984. Optimization in behavioural ecology. In Behavioural Ecology. An Evolutionary Approach, ed. J. R. Krebs & N. B. Davies, 2nd edn., pp. 91–21. Blackwell, Oxford
Krebs, C. J., A. R. E. Sinclair, R. Boonstra, S. Boutin, K. Martin & J. N. M. Smith. 1998. Community dynamics of vertebrate herbivores: how can we untangle the web? In Herbivores: Between Plants and Predators, ed. H. Olff, V. K. Brown & R. H. Drent, pp. 447–73. Blackwell Science, Oxford
Kruuk, H. 1972. The Spotted Hyena. University of Chicago Press, Chicago
Laca, E. A. & M. W. Demment. 1991. Herbivory: the dilemma of foraging in a spatially heterogeneous food environment. In Plant Defences Against Mammalian Herbivory, ed. R. T. Palo & C. T. Robbins. pp. 29–44. CRC Press, Boca Raton, FL
Laca, E. A. & M. W. Demment. 1993. Modelling intake of a grazing ruminant in a heterogeneous environment. In Proceedings of the International Symposium on Vegetation-Herbivore Relationships, ed. T. Okubo, B. Hubest & G. Arnold, pp. 57–76. Academic Press, London
Laca, E. A. & M. W. Demment. 1996. Foraging strategies of grazing animals. In The Ecology and Management of Grazing Systems, ed. J. Hodgson & A. W. Illius, pp. 137–58. CAB International, Wallingford, UK
Laca, E. A., Distel, R. A., Griggs, T. C. & Demment, M. W.. 1994a. Effects of canopy structure on patch depression by grazers. Ecology 75: 706–16CrossRefGoogle Scholar
Laca, E. A., R. A. Distel, T. C. Griggs, G. Deo & M. W. Demment. 1993. Field test of optimal foraging with cattle: the marginal value theorem successfully predicts patch selection and utilisation. Proc. XVII Int. Grassl. Congr., pp. 709–10
Laca, E. A., Ungar, E. D. & Demment, M. W.. 1994b. Mechanism of handling time and intake rate of a large mammalian grazer. Appl. Anim. Behav. Sci. 39: 3–19CrossRefGoogle Scholar
Laca, E. A., Ungar, E. D., Seligman, N. & Demment, M. W.. 1992. Effects of sward height and bulk density on bite dimensions of cattle grazing homogeneous swards. Grass Forage Sci. 47: 91–102CrossRefGoogle Scholar
Lange, R. T. 1969. The piosphere: sheep track and dung patterns. J. Range Mgmt 22: 396–400CrossRefGoogle Scholar
Langvatn, R. & Hanley, T. A.. 1993. Feeding patch choice by red deer in relation to foraging efficiency. Oecologia 95: 164–70CrossRefGoogle Scholar
Laws, R. M. & Parker, I. S. C.. 1968. Recent studies on elephant populations in East Africa. Symp. Zool. Soc., Lond. No. 21, pp. 319–59Google Scholar
Lechner-Doll, M., Rutagwenda, T., Schwartz, H. J., Schultka, W. & Engelhardt, W. v.. 1990. Seasonal changes of ingestion mean retention time and forestomach fluid volume in indigenous camels, cattle, sheep and goats grazing a thornbush savannah pasture in Kenya. J. Agric. Sci., Cambr. 115: 409–20CrossRefGoogle Scholar
Ledger, H. P. 1968. Body composition as a basis for a comparative study of some East African mammals. In Comparative Nutrition of Wild Animals, ed. M. A. Crawford (Symp. Zool. Soc., Lond. No. 21), pp. 289–310
Leirs, H., Stenseth, N. C., Nicholl, J. D., Hines, J. E., Verhagen, R. & Verhagen, W.. 1997. Stochastic seasonality and nonlinear density-dependent factors regulate population size in an African rodent. Nature 389: 176–80CrossRefGoogle Scholar
Lemaire, G. & D. Chapman. 1996. Tissue flows in grazed plant communities. In The Ecology and Management of Grazing Systems, ed. J. Hodgson & A. W. Illius, pp. 3–36. CAB International, Wallingford, UK
Loison, A., Festa-Bianchet, M., Gaillard, J.-M., Jorgenson, J. T. & Jullien, J.-M.. 1999. Age-specific survival in five populations of ungulates: evidence of senescence. Ecology 80: 2539–54CrossRefGoogle Scholar
Lotka, A. J. 1925. Elements of Mathematical Biology. Dover, New York
Lott, D. F. 1991. Intraspecific Variation in the Social Systems of Wild Vertebrates. Cambridge University Press, Cambridge
Low, W. A., Dudzinski, M. L. & Miller, W. J.. 1981. The influence of forage and climatic conditions on range community preferences of shorthorn cattle in central Australia. J. Appl. Ecol. 18: 11–26CrossRefGoogle Scholar
Ludwig, D., Hilborn, R. & Walters, C.. 1993. Uncertainty, resource exploitation, and conservation: lessons from history. Science 260: 17–36CrossRefGoogle ScholarPubMed
Mangel, M. & C. W. Clark. 1988. Dynamic Modelling in Behavioral Ecology. Princeton University Press, Princeton, NJ
Manser, M. B. & Brotherton, P. N. M.. 1995. Environmental constraints on the foraging behaviour of a dwarf antelope. Oecologia 102: 404–12CrossRefGoogle ScholarPubMed
Martin, R. B., G. C. Craig & V. R. Booth. 1989. Elephant Management in Zimbabwe. Department of National Parks & Wild Life Management, Harare, Zimbabwe
May, R. M. 1973. Stability and Complexity in Model Ecosystems. Princeton University Press, Princeton, NJ
May, R. M. 1981. Models for single populations. In Theoretical Ecology, ed. R. M. May, pp. 5–29. Blackwell, Oxford
May, R. & Oster, G.. 1976. Bifurcations and dynamic complexity in simple ecological models. Am. Nat. 110: 573–99CrossRefGoogle Scholar
Maynard Smith, J. & Slatkin, M.. 1973. The stability of predator-prey systems. Ecology 54: 384–91CrossRefGoogle Scholar
McCabe, J. T. 1987. Drought and recovery: Livestock dynamics among the Ngisonyoka Turkana of Kenya. Human Ecol. 15: 317–29CrossRefGoogle Scholar
McCullough, D. R. 1992. Concepts of large herbivore population dynamics. In Wildlife 2001. Populations, ed. D. R. McCullough & R. H. Barrett, pp. 967–84. Elsevier, London
McCullough, D. R. 1997. Irruptive behavior in ungulates. In The Science of Overabundance, Deer Ecology and Population Management, ed. W. J. McShea, H. B. Underwood & J. H. Rappole, pp. 69–99. Smithsonian Institution Press, Washington, DC
McLeod, S. R. 1997. Is the concept of carrying capacity useful in variable environments?Oikos 79: 529–42CrossRefGoogle Scholar
McNamara, J. M. & Houston, A. I.. 1987a. Partial preferences and foraging. Anim. Behav. 35: 1084–99CrossRefGoogle Scholar
McNamara, J. M. & Houston, A. I.. 1987b. Starvation and predation as factors limiting population size. Ecology 68: 1515–19CrossRefGoogle Scholar
McNamara, J. M. & Houston, A. I.. 1990. The value of fat reserves and the trade-off between starvation and predation. Acta Biotheor. 38: 37–61CrossRefGoogle Scholar
McNamara, J. M. & Houston, A. I.. 1996. State-dependent life histories. Nature 380: 215–21CrossRefGoogle ScholarPubMed
McNaughton, S. J. 1976. Serengeti migratory wildebeest: facilitation of energy flow by grazing. Science 191: 92–3CrossRefGoogle ScholarPubMed
McNaughton, S. J. 1979a. Grazing as an optimization process: grass-ungulate relationships in the Serengeti. Am. Nat. 113: 691–703CrossRefGoogle Scholar
McNaughton, S. J. 1979b. Grassland herbivore dynamics. In Serengeti: Dynamics of an Ecosystem, ed. A. R. E. Sinclair & M. Norton-Griffiths, pp. 46–81. University of Chicago Press, Chicago, IL
McNaughton, S. J. 1983. Compensatory plant growth as a response to herbivory. Oikos 40: 329–36CrossRefGoogle Scholar
McNaughton, S. J. 1984. Grazing lawns: animals in herds, plant form and coevolution. Am. Nat. 124: 863–86CrossRefGoogle Scholar
McNaughton, S. J., Banyikwa, F. F. & McNaughton, M. M.. 1997. Promotion of the cycling of diet-enhancing nutrients by African grazers. Science 278: 1798–800CrossRefGoogle ScholarPubMed
McNaughton, S. J., Banyikwa, F. F. & McNaughton, M. M.. 1998. Root biomass and productivity in a grazing ecosystem: the Serengeti. Ecology 79: 587–92CrossRefGoogle Scholar
Mduma, S. A. R., Sinclair, A. R. E. & Hilborn, R.. 1999. Food regulates the Serengeti wildebeest: a 40-year record. J. Anim. Ecol. 68: 1101–22CrossRefGoogle Scholar
Meissner, H. H. & Paulsmeier, D. V.. 1995. Plant composition affecting between-plant and animal species prediction of forage intake. J. Anim. Sci. 73: 2447–57CrossRefGoogle Scholar
Meissner, H. H., P. J. K. Zacharias & P. J. O'Reagain. 1999. Forage quality (feed value). In Veld Management in South Africa, ed. N. M. Tainton, pp. 139–68. University of Natal Press, Pietermaritzburg
Mentis, M. T. 1981. Acceptability and palatability. In Veld and Pasture Management in South Africa, ed. N. M. Tainton, pp. 186–91. Shuter & Shooter, Pietermaritzburg
Mertens, D. R. 1977. Dietary fiber components: relationships to the rate and extent of ruminal digestion. Fedn Am. Socs. Exp. Biol. 36: 187–92Google Scholar
Mertens, D. R. 1987. Predicting intake and digestibility using mathematical models of rumen function. J. Anim. Sci. 64: 1548–58CrossRefGoogle Scholar
Messier, F. 1994. Ungulate population models with predation: a case study with North American moose. Ecology 75: 478–88CrossRefGoogle Scholar
Messier, F. 1995. Trophic interaction in two northern wolf-ungulate systems. Wildl. Res. 22: 131–46CrossRefGoogle Scholar
Metz, J. A. J. & O. Dieckmann. 1986. The Dynamics of Physiologically Structured Populations. Springer-Verlag, New York
Milinski, M. & G. Parker. 1991. Competition for resources. In Behavioural Ecology. An Evolutionary Approach, 3rd edn, ed. J. R. Krebs & N. B. Davies, pp. 137–68. Blackwell, Oxford
Miller, M. F. 1996. Dispersal of Acacia seeds by ungulates and ostriches in an African savanna. J. Trop. Ecol. 12: 345–56CrossRefGoogle Scholar
Mills, M. G. L., Biggs, H. C. & Whyte, I. J.. 1995. The relationship between rainfall, lion predation and population trends in African herbivores. Wildl. Res. 22: 75–88CrossRefGoogle Scholar
Milne, J. A., MacRae, J. C., Spence, A. M. & Wilson, S.. 1976. Intake and digestion of hill-land vegetation by the red deer and the sheep. Nature 263: 763–4CrossRefGoogle Scholar
Milner, C. & D. Gwynne. 1974. The Soay sheep and their food supply. In Island Survivors. The Ecology of the Soay Sheep of St. Kilda, ed. P. A. Jewell, C. Milner & J. Morton Boyd, pp. 273–325. Athlone Press, University of London
Milner, J. M., Albon, S. D., Illius, A. W., Pemberton, J. M. & Clutton-Brock, T. H.. 1999a. Repeated selection of morphometric traits in the Soay sheep on St. Kilda. J. Anim. Ecol. 68: 472–88CrossRefGoogle Scholar
Milner, J. M., Elston, D. A. & Albon, S. D.. 1999b. Estimating the contributions of population density and climatic fluctuations to interannual variation in survival of Soay sheep. J. Anim. Ecol. 68: 1235–47CrossRefGoogle Scholar
Milner-Gulland, E. J. & R. Mace. 1998. Conservation of Biological Resources. Blackwell Science, Oxford
Moen, A. N. 1973. Wildlife Ecology. Freeman, San Francisco
Molvar, E. M., Bowyer, R. T. & Ballenbergh, V.. 1993. Moose herbivory, browse quality and nutrient cycling in an Alaskan treeline community. Oecologia 94: 472–9CrossRefGoogle Scholar
Morton Boyd, J. 1974. Introduction. In Island Survivors. The Ecology of the Soay Sheep of St Kilda, ed. P. A. Jewell, C. Milner & J. Morton Boyd, pp. 1–7. Athlone Press, University of London
Mrosovsky, N. & Prowley, T. L.. 1977. Set points for body weight and fat. Behav. Biol. 20: 205–23CrossRefGoogle ScholarPubMed
Murray, M. G. 1993. Comparative nutrition of wildebeest, hartebeest and topi in the Serengeti. Afr. J. Ecol. 31: 172–7CrossRefGoogle Scholar
Murray, M. G. & Brown, D.. 1993. Niche separation of grazing ungulates in the Serengeti: an experimental test. J. Anim. Ecol. 62: 380–9CrossRefGoogle Scholar
Murray, M. G. & A. W. Illius. 1996. Multispecies grazing in the Serengeti. In The Ecology and Management of Grazing Systems, ed. J. Hodgson & A. W. Illius, pp. 247–72. CAB International, Wallingford, UK
Murray, M. G. & Illius, A. W.. 2000. Vegetation modification and resource competition in grazing ungulates. Oikos 89: 501–8CrossRefGoogle Scholar
Newman, J. A., Parsons, A. J. & Harvey, A.. 1993. Not all sheep prefer clover: diet selection revisited. J. Agric. Sci., Cambr. 119: 275–83CrossRefGoogle Scholar
Nicolis G. & I. Prigogine. 1977. Self-organization in Non-equilibrium Systems. Wiley, New York
Novellie, P. A. 1978. Comparison of the foraging strategies of blesbok and springbok on the Transvaal highveld. S. Afr. J. Wildl. Res. 8: 137–44Google Scholar
Novellie, P. 1990. Habitat use by indigenous grazing ungulates in relation to sward structure and veld condition. J. Grassl. Soc. Sth. Afr. 7: 16–23CrossRefGoogle Scholar
Noy-Meir, I. 1975. Stability of grazing systems: an application of predator-prey graphs. J. Ecol. 63: 459–81CrossRefGoogle Scholar
Noy-Meir, I. 1978. Grazing and production in seasonal pastures: analysis of a simple model. J. Appl. Ecol. 15: 809–35CrossRefGoogle Scholar
O'Connor, T. G. 1991. Local extinction in perennial grasslands: a life history approach. Am. Nat. 137: 753–73CrossRefGoogle Scholar
Oftedal, O. T. 1984. Milk composition, milk yield and energy output at peak lactation. In Lactation Strategies. (Symp. Zool. Soc. Lond. No. 51), pp. 33–85
Oksanen, L., Moen, J. & Lundberg, P. A.. 1992. The time-scale problem in exploiter-victim models: does the solution lie in ratio-dependent exploitation?Am. Nat. 140: 938–60CrossRefGoogle Scholar
Oliver, M. D. N., Short, N. R. M. & Hanks, J.. 1978. Population ecology of oribi, grey rhebuck and mountain reedbuck in Highmoor State Forest Land, Natal. S. Afr. J. Wildl. Res. 8: 95–105Google Scholar
O'Reagain, P. J. 1993. Plant structure and the acceptability of different grasses to sheep. J. Range Mgmt 46: 232–6CrossRefGoogle Scholar
O'Reagain, P. J. 1994. The effect of sward structure and species composition on dietary quality and intake in cattle and sheep grazing the Dohne sourveld. PhD thesis, University of the Witwatersrand
O'Reagain, P. J. 2001. Foraging strategies on rangelands: Effects of intake and animal performance. In Proceedings of the XIX International Grassland Congress, Sao Pedro, Brazil, Feb. 2001, ed. J. A. Gomide, W. R. S. Mattos and S. C. da Silva, pp. 277–84. Brazilian Society of Animal Production, Sao Paulo, Brazil
O'Reagain, P. J., Goetsch, B. C. & Owen-Smith, R. N.. 1995. Ruminal degradation characteristics of some African rangeland grasses. J. Agric. Sci., Cambr. 125: 189–97CrossRefGoogle Scholar
O'Reagain, P. J., Goetsch, B. C. & Owen-Smith, R. N.. 1996. Effect of species composition and sward structure on the ingestive behaviour of cattle and sheep grazing South African sourveld. J. Agric. Sci., Cambr. 127: 271–80CrossRefGoogle Scholar
O'Reagain, P. J. & Grau, E. R.. 1995. Sequence of species selection by cattle and sheep on South African sourveld. J. Range Mgmt 48: 314–21CrossRefGoogle Scholar
O'Reagain, P. J. & Mentis, M. T.. 1989a. Sequence and process of species selection by cattle in relation to optimal foraging theory in an old land in the Natal Sour Sandveld. J. Grassl. Soc. Sth. Afr. 6: 71–6Google Scholar
O'Reagain, P. J. & Mentis, M. T.. 1989b. The effect of plant structure on the acceptability of different grass species to cattle. J. Grassl. Soc. Sth. Afr. 6: 163–70CrossRefGoogle Scholar
O'Reagain, P. J. & Mentis, M. J.. 1990. The effects of veld condition on the quality of diet selected by cattle grazing the Natal Sour Sandveld. J. Grassl. Soc. Sth. Afr. 7: 190–5CrossRefGoogle Scholar
O'Reagain, P. J. & Owen-Smith, R. N.. 1996. Effect of species composition and sward structure on dietary quality in cattle and sheep grazing South Africa sourveld. J. Agric. Sci., Cambr. 127: 261–70CrossRefGoogle Scholar
O'Reagain, P. J. & J. Schwartz. 1995. Dietary selection and foraging strategies of animals on rangeland. Coping with spatial and temporal variability. In Recent Developments in the Nutrition of Herbivores (Proceedings of IV International Symposium on the Nutrition of Herbivores), ed. M. Journet, E. Grenet, M.-H. Farce, M. Thierez & C. Demarquilly, pp. 407–23. INRA Editions, Paris
Orians, G. H. & N. E. Pearson. 1979. On the theory of central place foraging. In Analysis of Ecological Systems, ed. D. J. Horn, R. D. Mitchell & G. R. Stairs, pp. 154–77. Ohio State University Press, Columbus
Owen-Smith, N. 1973. The behavioural ecology of the white rhinoceros. PhD thesis, University of Wisconsin
Owen-Smith, N. 1974. The social system of the white rhinoceros. In The Behaviour of Ungulates and Its Relation to Management (IUCN Public., NS No. 24) ed. V. Geist & F. Walther, pp. 341–51. IUCN, Morges
Owen-Smith, N. 1975. The social ethology of the white rhinoceros. Z. Tierpsychol. 38: 337–84CrossRefGoogle Scholar
Owen-Smith, N. 1979. Assessing the forage efficiency of a large herbivore, the kudu. S. Afr. J. Wildl. Res. 9: 102–10Google Scholar
Owen-Smith, N. 1981. The white rhinoceros overpopulation problem, and a proposed solution. In Problems in Management of Locally Abundant Wild Mammals, ed. P. A. Jewell, S. Holt & D. Hart, pp. 129–50. Academic Press, New York
Owen-Smith, N. 1982. Factors influencing the consumption of plant products by large herbivores. In The Ecology of Tropical Savannas, ed. B. J. Huntley & B. H. Walker, pp. 359–404. Springer-Verlag, Berlin and Hamburg
Owen-Smith, N. 1983. Dispersal and the dynamics of large herbivore populations in enclosed areas. In Management of Large Mammals in African Conservation Areas, ed. R. N. Owen-Smith, pp. 127–43. Haum, Pretoria
Owen-Smith, N. 1985. Niche separation among African ungulates. In Species and Speciation, ed. E. S. Vrba (Transvaal Museum Monograph No. 4), pp. 167–71
Owen-Smith, R. N. 1988. Megaherbivores. The Influence of Very Large Body Size on Ecology. (Cambridge Studies in Ecology). Cambridge University Press, Cambridge
Owen-Smith, N. 1989. Megafaunal extinctions: the conservation message from 11 000 years BP. Cons. Biol. 3: 405–12CrossRefGoogle Scholar
Owen-Smith, N. 1990. Demography of a large herbivore, the greater kudu, in relation to rainfall. J. Anim. Ecol. 59: 893–913CrossRefGoogle Scholar
Owen-Smith, N. 1991. Veld condition and animal performance: application of an optimal foraging model. J. Grassl. Soc. Sth. Afr. 8: 77–81CrossRefGoogle Scholar
Owen-Smith, N. 1993a. Evaluating optimal diet models for an African browsing ruminant, the kudu: how constraining are the assumed constraints?Evol. Ecol. 7: 499–524CrossRefGoogle Scholar
Owen-Smith, N. 1993b. Comparative mortality rates of male and female kudus: the costs of sexual size dimorphism. J. Anim. Ecol. 62: 428–40CrossRefGoogle Scholar
Owen-Smith, N. 1993c. Age, size, dominance and reproduction among male kudus: mating enhancement by attrition of rivals. Behav. Ecol. Sociobiol. 32: 177–84CrossRefGoogle Scholar
Owen-Smith, N. 1994. Foraging responses of kudus to seasonal changes in food resources: elasticity in constraints. Ecology 75: 1050–62CrossRefGoogle Scholar
Owen-Smith, N. 1996a. Ecological guidelines for waterpoints in extensive protected areas. S. Afr. J. Wildl. Res. 26: 107–12Google Scholar
Owen-Smith, N. 1996b. Circularity in linear programming models of optimal diet. Oecologia 108: 259–61CrossRefGoogle Scholar
Owen-Smith, N. 1997. Control of energy balance by a wild ungulate, the kudu, through adaptive foraging behaviour. Proc. Nutr. Soc. 56: 15–24CrossRefGoogle ScholarPubMed
Owen-Smith, N. 1998a. How high ambient temperature affects the daily activity and foraging time of a subtropical ungulate, the greater kudu. J. Zool., Lond. 246: 183–92CrossRefGoogle Scholar
Owen-Smith, N. 1998b. Dynamics of herbivore-vegetation systems and the overgrazing issue. In Communal Rangelands in Southern Africa: A Synthesis of Knowledge. Proceedings of a Symposium on Policy-making for the Sustainable Use of Southern African Communal Rangelands, ed. T. D. de Bruyn & P. F. Scogings, pp. 124–34. Dept. of Livestock & Pasture Science, University of Fort Hare, Alice, South Africa
Owen-Smith, N. 2000. Modelling the population dynamics of a subtropical ungulate in a variable environment: rain, cold and predators. Natur. Res. Model. 13: 57–87CrossRefGoogle Scholar
Owen-Smith, N. & Cooper, S. M.. 1985. Comparative consumption of vegetation components by kudus, impalas and goats in relation to their commercial potential as browsers in savanna regions. S. Afr. J. Sci. 81: 72–6Google Scholar
Owen-Smith, N. & Cooper, S. M.. 1987a. Palatability of woody plants to browsing ungulates in a South African savanna. Ecology 68: 319–31CrossRefGoogle Scholar
Owen-Smith, N. & Cooper, S. M.. 1987b. Acceptability indices for assessing the food preferences of ungulates. J. Wildl. Mgmt 51: 372–8CrossRefGoogle Scholar
Owen-Smith, N. & Cooper, S. M.. 1989. Nutritional ecology of a browsing ruminant, the kudu, through the seasonal cycle. J. Zool., Lond. 219: 29–43CrossRefGoogle Scholar
Owen-Smith, N. & J. E. Danckwerts. 1997. Herbivory. In Vegetation of Southern Africa, ed. R. M. Cowling, D. M. Richardson & S. M. Pierce, pp. 397–420. Cambridge University Press
Owen-Smith, N. & Novellie, P.. 1982. What should a clever ungulate eat?Am. Nat. 119: 151–78CrossRefGoogle Scholar
Panaretto, B. A. 1968. Estimation of body composition by the dilution of hydrogen isotopes. In Body Composition in Animals and Man, pp. 200–17. National Academy of Sciences, Washington, DC
Papageorgiou, N. 1979. Population energy relationships of the Agrimi on Theodorou Island, Greece. Mammalia Depicta. Verlag Paul Parey, Berlin
Parker, K. L. 1988. Effects of heat, cold and rain on coastal black-tailed deer. Can. J. Zool. 66: 2475–83CrossRefGoogle Scholar
Parker, K. L., Gillingham, M. P., Hanley, T. A. & Robbins, C. T.. 1993. Seasonal patterns in body weight, body composition, and water transfer rates of free ranging and captive black tailed deer in Alaska. Can. J. Zool. 71: 1397–404CrossRefGoogle Scholar
Parker, K. L., Gillingham, M. P., Hanley, T. A. & Robbins, C. T.. 1996. Foraging efficiency: energy expenditure versus energy gain in free ranging black tailed deer. Can. J. Zool. 74: 442–50CrossRefGoogle Scholar
Parker, K. L., M. P. Gillingham, T. A. Hanley & C. T. Robbins. 1999. Energy and protein balance of free-ranging black-tailed deer in a natural forest environment. Wildl. Monogr. No. 143, 48pp
Parsons, A. J., Newman, J. A., Penning, P. D., Harvey, A. & Orr, R. J.. 1994. Diet preference of sheep: effects of recent diet, physiological state and species abundance. J. Anim. Ecol. 63: 465–78CrossRefGoogle Scholar
Pastor, J., Moen, R. A. & Cohen, Y.. 1997. Spatial heterogeneity, carrying capacity and feedbacks in animal-landscape interactions. J. Mamm. 78: 1040–52CrossRefGoogle Scholar
Peel, M. J. S., Biggs, H. & Zacharias, P. J. K.. 1999. The evolving use of stocking rate indices currently based on animal number and type in semi-arid heterogeneous landscapes and complex land-use systems. Afr. J. Range Forage Sci. 15: 117–27CrossRefGoogle Scholar
Pellew, R. A. 1984. The feeding ecology of a selective browser, the giraffe. J. Zool., Lond. 202: 57–81CrossRefGoogle Scholar
Penry, D. L. 1993. Digestive constraints on diet choice. In Diet Selection, ed. R. N. Hughes, pp. 32–55. Blackwell, Oxford
Penry, D. L. & Jumars, P. A.. 1986. Chemical reactor analysis and optimal digestion. BioScience 36: 310–15CrossRefGoogle Scholar
Penry, D. L. & Jumars, P. A.. 1987. Modelling animal guts as chemical reactors. Am. Nat. 129: 69–96CrossRefGoogle Scholar
Perez-Barberia, F. J. & Gordon, I. J.. 2001. Relationships between oral morphology and feeding style in the Ungulata: a phylogenetically controlled evaluation. Proc. R. Soc. Lond. B 268: 1021–30CrossRefGoogle ScholarPubMed
Peters, R. H. 1983. The Ecological Implications of Body Size. Cambridge University Press, Cambridge
Peterson, C. C., Nagy, K. A. & Diamond, J.. 1990. Sustained metabolic scope. Proc. Nat. Acad. Sci. USA 87: 2324–8CrossRefGoogle ScholarPubMed
Peterson, R. O. 1999. Wolf-moose interaction on Isle Royale: the end of natural regulation?Ecol. Applic. 9: 10–16Google Scholar
Peterson, R. O., Page, R. E. & Dodge, K. M.. 1984. Wolves, moose and the allometry of population cycles. Science 224: 1350–2CrossRefGoogle ScholarPubMed
Pielou, E. 1969. An Introduction to Mathematical Ecology. Wiley-Interscience, New York
Prigogine, I. & Wiame, J. M.. 1946. Biologie et thermodynamique des phenomenes irreversibles. Experientia 2: 451–3CrossRefGoogle Scholar
Price, P. W. 1984. Insect Ecology. 2nd edn. John Wiley & Sons, New York
Prins, H. H. T. 1996. Ecology and Behaviour of the African Buffalo. Chapman & Hall, London
Prins, H. H. T. & H. Olff. 1998. Species richness of African grazer assemblages: towards a functional explanation. In Dynamics of Tropical Ecosystems, ed. D. N. Newberry, H. H. T. Prins & N. Brown, pp. 449–90. Blackwell, Oxford
Provenza, F. D. 1995. Postingestive feedback as an elementary determinant of food preference and intake in ruminants. J. Range Mgmt 48: 2–17CrossRefGoogle Scholar
Pulliam, H. R. 1988. Sources, sinks and population regulation. Am. Nat. 132: 652–61CrossRefGoogle Scholar
Rasmussen, D. I. 1941. Biotic communities of the Kaibab Plateau. Ecol. Monogr. 3: 229–75CrossRefGoogle Scholar
Real, L. A. 1977. The kinetics of functional response. Am. Nat. 111: 289–300CrossRefGoogle Scholar
Reimers, E., Ringberg, J. & Sorumgard, R.. 1982. Body composition of Svalbard reindeer. Can. J. Zool. 60: 1812–21CrossRefGoogle Scholar
Renecker, L. A. & Hudson, R. J.. 1986. Seasonal foraging rates of free-ranging moose. J. Wildl. Mgmt 50: 143–7CrossRefGoogle Scholar
Ricklefs, R. E., Konarzewski, M. & Daan, S.. 1996. The relationship between basal metabolic rate and daily energy expenditure in birds and mammals. Am. Nat. 147: 1047–71CrossRefGoogle Scholar
Ringberg, T. M., White, R. G., Holleman, D. F. & Luick, J. R.. 1981. Body growth and carcase composition of lean reindeer from birth to sexual maturity. Can. J. Zool. 59: 1040–61CrossRefGoogle Scholar
Risenhoover, K. L. 1987. Winter foraging strategies of moose in subarctic and boreal forest habitats. PhD thesis, Michigan Technological University
Risenhoover, K. L. & Peterson, R. O.. 1986. Mineral licks as a sodium source for Isle Royal moose. Oecologia 71: 121–6CrossRefGoogle Scholar
Robbins, C. T. 1993. Wildlife Feeding and Nutrition. Academic Press, New York
Robbins, C. T., Prior, R. L., Moen, A. N. & Vesek, W. J.. 1974. Nitrogen metabolism of white-tailed deer. J. Anim. Sci. 38: 186–91CrossRefGoogle ScholarPubMed
Robbins, C. T., Podbielancik-Norman, R. S., Wilson, D. L. & Mould, E. P.. 1981. Growth and nutrient consumption of elk calves compared to other ungulate species. J. Wildl. Mgmt 45: 172–86CrossRefGoogle Scholar
Robbins, C. T., Spalinger, D. E. & Hoven, W.. 1995. Adaptions of ruminants to browse and grass diets: are anatomical-based browser-grazer interpretations valid?Oecologia 103: 208–13CrossRefGoogle Scholar
Rosenzweig, M. L. 1971. Paradox of enrichment: destabilization of exploitation systems. Science 171: 385–7CrossRefGoogle Scholar
Rosenzweig, M. L. 1981. A theory of habitat selection. Ecology 62: 327–35CrossRefGoogle Scholar
Rosenzweig, M. L. 1991. Habitat selection and population interactions: the search for mechanism. Am. Nat. 137 (Suppl.): 5–28CrossRefGoogle Scholar
Rosenzweig, M. L. & Abramsky, Z.. 1997. Two gerbils of the Negev: a long-term investigation of optimal habitat selection and its consequences. Evol. Ecol. 11: 733–56CrossRefGoogle Scholar
Roughgarden, J. 1997. Production functions for ecological populations: a survey with emphasis on spatially explicit models. In Spatial Ecology, ed. D. Tilman & P. Kareiva, pp. 296–317. Princeton University Press, Princeton, NJ
Ruel, J. J. & Ayres, M. P.. 1999. Jensen's inequality predicts effects of environmental variation. Trends Ecol. Evol. 14: 361–6CrossRefGoogle ScholarPubMed
Rutherford, M. C. 1980. Annual plant production-precipitation relations in arid and semi-arid regions. S. Afr. J. Sci. 76: 53–6Google Scholar
Rutherford, M. C. 1984. Relative allocation and seasonal phasing of growth of woody plant components in a South African savanna. Progr. Biometeorol. 3: 200–21Google Scholar
Rutherford, M. C. & Panagos, M. D.. 1982. Seasonal woody plant shoot growth in Burkea africana — Ochna pulchra savanna. S. Afr. J. Bot. 1: 104–16CrossRefGoogle Scholar
Sale, P. P. & Tolimieri, N.. 2000. Density dependence at some time and place. Oecologia 124: 166–71CrossRefGoogle ScholarPubMed
Scheffer, V. B. 1951. The rise and fall of a reindeer herd. Scient. Monthly 73: 356–62Google Scholar
Schmidt, K. A., Eambardt, J. M., Brown, J. S. & Holt, R. D.. 2000. Habitat selection under temporal heterogeneity: exorcizing the ghost of competition past. Ecology 81: 2622–30CrossRefGoogle Scholar
Schmidt-Nielsen, K. 1975. Animal Physiology. Adaptation and Environment. Cambridge University Press, Cambridge
Schmitz, O. J., Beckerman, A. P. & Litman, S.. 1997. Functional responses of adaptive consumers and community stability with emphasis on the dynamics of plant-herbivore systems. Evol. Ecol. 11: 773–84CrossRefGoogle Scholar
Scholes, R. J. & B. H. Walker. 1993. An African Savanna. Synthesis of the Nylsvley Study. Cambridge University Press, Cambridge
Scoones, I. 1992. Coping with drought: responses of herders and livestock in contrasting savanna environments in Southern Zimbabwe. Human Ecol. 20: 293–314CrossRefGoogle Scholar
Scoones, I. 1993. Why are there so many animals? Cattle population dynamics in the communal areas of Zimbabwe. In Range Ecology at Disequilibrium, ed. R. H. Behnke, I. Scoones & C. Kerven, pp. 62–76. ODI Publications, London
Scoones, I. 1995. Exploiting heterogeneity: habitat use by cattle in dryland Zimbabwe. J. Arid Envir. 29: 221–37CrossRefGoogle Scholar
Senft, R. L., Stilwell, M. A. & Rittenhouse, L. R.. 1987. Nitrogen and energy budgets of free-roaming cattle. J. Range Mgmt 40: 421–4CrossRefGoogle Scholar
Shackleton, C. M. 1993. Are the communal grazing lands in need of saving?Development Southern Africa 10: 65–78CrossRefGoogle Scholar
Shipley, L. A., Gross, J. G., Spalinger, D. E., Hobbs, N. T. & Wunder, B. A.. 1994. The scaling of the functional response of mammalian herbivores. Am. Nat. 143: 1055–82CrossRefGoogle Scholar
Shipley, L. A. & Spalinger, D. E.. 1995. Influence of size and density of browse patches on intake rates and foraging decisions of young moose and white-tailed deer. Oecologia 104: 112–21CrossRefGoogle ScholarPubMed
Short, J. 1985. The functional response of kangaroos, sheep and rabbits in an arid grazing system. J. Appl. Ecol. 22: 435–47CrossRefGoogle Scholar
Shugart, H. H. 1998. Terrestrial Ecosystems in Changing Environments. Cambridge University Press, Cambridge
Sibly, R. M. 1981. Strategies of digestion and defecation. In Physiological Ecology, ed. C. R. Townsend & P. Calow, pp. 109–39. Blackwell, Oxford
Sinclair, A. R. E. 1974. The natural regulation of buffalo populations in East Africa. IV. The food supply as a regulating factor and competition. E. Afr. Wildl. J. 12: 291–321CrossRefGoogle Scholar
Sinclair, A. R. E. 1977. The African Buffalo. A Study of Resource Limitation in Populations. University of Chicago Press, Chicago
Sinclair, A. R. E. 1985. Does interspecific competition or predation shape the African ungulate community?J. Anim. Ecol. 54: 899–918CrossRefGoogle Scholar
Sinclair, A. R. E. 1989. Population regulation in animals. In Ecological Concepts, ed. J. M. Cherrett, pp. 197–241. Blackwell, Oxford
Sinclair, A. R. E. & Arcese, P.. 1995. Population consequences of predation-sensitive foraging: the Serengeti wildebeest. Ecology 76: 882–91CrossRefGoogle Scholar
Sinclair, A. R. E., Dublin, H. & Borner, M.. 1985. Population regulation of Serengeti wildebeest: a test of the food hypothesis. Oecologia 65: 266–8CrossRefGoogle ScholarPubMed
Sinclair, A. R. E. & Duncan, P.. 1972. Indices of condition in tropical ruminants. E. Afr. Wildl. J. 10: 143–9CrossRefGoogle Scholar
Sinclair, A. R. E. & Norton-Griffiths, M.. 1983. Does competition or facilitation regulate migrant ungulate populations in the Serengeti? A test of hypotheses. Oecologia 53: 364–9CrossRefGoogle Scholar
Singer, F. J., Harting, A., Symonds, K. K. & Coughenour, M. B.. 1997. Density dependence, compensation and environmental effects on elk calf mortality in Yellowstone National Park. J. Wildl. Mgmt 61: 12–25CrossRefGoogle Scholar
Skogland, T. 1985. The effects of density-dependent resource limitations on the demography of wild reindeer. J. Anim. Ecol. 54: 359–74CrossRefGoogle Scholar
Skogland, T. 1988. Tooth wear by food limitation and its life history consequences in wild reindeer. Oikos 51: 238–42CrossRefGoogle Scholar
Skogland, T. 1990. Density dependence in a fluctuating wild reindeer herd: maternal vs offspring effects. Oecologia 84: 442–50CrossRefGoogle Scholar
Smith, N. S. 1970. Appraisal of condition estimation models for East African ungulates. E. Afr. Wildl. J. 8: 123–9CrossRefGoogle Scholar
Sohal, R. S. & Weindruch, R.. 1996. Oxidative stress, caloric restriction and aging. Science 273: 59–63CrossRefGoogle ScholarPubMed
Solomon, M. E. 1949. The natural control of animal populations. J. Anim. Ecol. 18: 1–35CrossRefGoogle Scholar
Spalinger, D. E. & Hobbs, N. T.. 1992. Mechanisms of foraging in mammalian herbivores: new models of functional response. Am. Nat. 140: 325–48CrossRefGoogle ScholarPubMed
Spalinger, D. E., Robbins, C. T. & Hanley, T. A.. 1993. Adaptive rumen function in elk and mule deer. Can. J. Zool. 71: 601–10CrossRefGoogle Scholar
Staddon, J. E. R. 1983. Adaptive Behavior and Learning. Cambridge University Press, Cambridge
Stafford Smith, D. M. 1996. Management of rangelands: paradigms at their limits. In The Ecology and Management of Grazing Systems, ed. J. Hodgson & A. Illius, pp. 325–58. CAB International, Wallingford, UK
Starfield, A. M., K. A. Smith & A. L. Bleloch. 1990. How to Model It. Problem Solving for the Computer Age. McGraw-Hill, New York
Stephens, D. W. & J. R. Krebs. 1986. Foraging Theory. Princeton University Press, Princeton, NJ
Sutherland, W. J. 1996. From Individual Behaviour to Population Ecology. Oxford University Press, Oxford
Swift, M. J., O. W. Heal & J. M. Anderson. 1979. Decomposition in Terrestrial Ecosystems. Blackwell Scientific Publications, Oxford
Tainton, N. M. 1981. The ecology of the main grazing lands of South Africa. In Veld and Pasture Management, ed. N. M. Tainton, pp. 25–56. Shuter & Shooter, Pietermaritzburg
Tainton, N. M. 1988. A consideration of veld condition assessment techniques for commercial livestock production in South Africa. J. Grassl. Soc. Sth. Afr. 5: 76–9CrossRefGoogle Scholar
Tainton, N. M. 1999. Veld Management in South Africa. University of Natal Press, Pietermaritzburg
Thom, R. 1975. Structural Stability and Morphogenesis. W. A. Benjamin Co., Reading, MA
Thornley, J. H. M. & J. R. Johnson. 1990. Plant and Crop Modelling. Oxford University Press, Oxford
Thrash, I. & Derry, J. F.. 1999. The nature and modelling of piospheres: a review. Koedoe 42: 73–94CrossRefGoogle Scholar
Tilman, D. 1980. Resources: a graphical-mechanistic approach to competition and predation. Am. Nat. 116: 362–93CrossRefGoogle Scholar
Tilman, D. 1982. Resource Competition and Community Structure. Princeton University Press, Princeton, NJ
Tilman, D. 1986. A consumer-resource approach to community structure. Am. Zool. 26: 3–22CrossRefGoogle Scholar
Tilman, D. 1988. Plant Strategies and the Dynamics and Structure of Plant Communities. (Monographs in Population Biology No. 26.) Princeton University Press, Princeton, NJ
Tilman, D. 1996. Biodiversity: population versus ecosystem stability. Ecology 77: 350–63CrossRefGoogle Scholar
Tilman, D. 1997. Community invasability, recruitment limitation and grassland biodiversity. Ecology 78: 81–92CrossRefGoogle Scholar
Tilman, D. & P. Kareiva. 1997. Spatial Ecology. The Role of Space in Population Dynamics and Interspecific Interactions. Princeton University Press, Princeton, NJ
Tolkamp, B. J. & Ketelaars, J. J. M. H.. 1992. Towards a new theory of feed intake regulation in ruminants 2. Costs and benefits of feed consumption: An optimization approach. Livestock Production Science 30: 97–317CrossRefGoogle Scholar
Torbit, S. C., Carpenter, L. H., Allridge, A. W. & Swift, D. M.. 1985. Mule deer body composition — a comparison of methods. J. Wildl. Mgmt 49: 86–91CrossRefGoogle Scholar
Torbit, S. C., Carpenter, L. H., Swift, D. M. & Alldredge, A. W.. 1982. Differential loss of fat and protein by mule deer during winter. J. Wildl. Mgmt 49: 80–5CrossRefGoogle Scholar
Trudell, J. & White, R. G.. 1981. The effect of forage structure and availability on food intake, biting rate, bite size and daily eating time of reindeer. J. Appl. Ecol. 18: 63–81CrossRefGoogle Scholar
Turner, M. G., Wu, Y., Romme, W. H. & Wallace, L. L.. 1993. A landscape simulation model of winter foraging by large ungulates. Ecol. Model. 69: 163–84CrossRefGoogle Scholar
Tyler, N. J. C. 1987. Body composition and energy balance of pregnant and non-pregnant Svalbard reindeer during winter. Symp. Zool. Soc. Lond. 57, 203–29Google Scholar
Underwood, R. 1982. Vigilance behaviour in grazing African ungulates. Behaviour 79: 81–107CrossRefGoogle Scholar
Underwood, R. 1983. The feeding behaviour of grazing African ungulates. Behaviour 84: 195–243CrossRefGoogle Scholar
Ungar, E. D., Seligman, N. G. & Demment, M. W.. 1992. Graphical analysis of sward depletion by grazing. J. Appl. Ecol. 29: 427–35CrossRefGoogle Scholar
Meer, J. & Ens, B. J.. 1997. Models of interference and their consequences for the spatial distribution of ideal and free predators. J. Anim. Ecol. 66: 846–58CrossRefGoogle Scholar
Van Soest, P. J. 1982. Nutritional Ecology of the Ruminant. O & B Books Inc., Corvallis, OR
van Wieren, S. E. 1992. Factors limiting food intake in ruminants and non-ruminants in the temperate zone. In Ongules/Ungulates 91, ed. F. Spitz, G. Janeau, G. Gonzalez & S. Aulagnier, pp. 139–145. SFEPM-IRGM, Paris, Tolouse
Wieren, S. E. 1997. Do large herbivores select a diet that maximizes short-term energy-intake rate?For. Ecol. Mgmt 88: 149–56CrossRefGoogle Scholar
Verlinden, C. & Wiley, R. H.. 1989. The constraints of digestive rate: an alternative model of diet selection. Evol. Ecol. 3: 264–73CrossRefGoogle Scholar
Vesey-Fitzgerald, D. T. 1960. Grazing succession among East African game animals. J. Mamm. 41: 161–72CrossRefGoogle Scholar
Vivas, H. J., Saether, B.-E. & Anderson, R.. 1991. Optimal twig-size selection of a generalist herbivore, the moose: implications for plant-herbivore interactions. J. Anim. Ecol. 60: 395–408CrossRefGoogle Scholar
Volterra, V. 1926. Fluctuations in the abundance of species considered mathematically. Nature 118: 558–60CrossRefGoogle Scholar
Walker, B. H., Emslie, R. H., Owen-Smith, N. & Scholes, R. J.. 1987. To cull or not to cull: lessons from a Southern African drought. J. Appl. Ecol. 24: 381–402CrossRefGoogle Scholar
WallisDeVries, M. & Daleboudt, C.. 1994. Foraging strategy of cattle in patchy grassland. Oecologia 100: 98–106Google Scholar
WallisDeVries, M. F., Laca, E. O. & Demment, M. W.. 1998. From feeding station to patch: scaling up food intake measurements in grazing cattle. Appl. Anim. Behav. Sci. 60: 301–15CrossRefGoogle Scholar
Walters, C. 1986. Adaptive Management of Renewable Natural Resources. Macmillan, New York
Ward, D. 1992. The role of satisficing in foraging theory. Oikos 63: 312–17CrossRefGoogle Scholar
Watson, L. H. 1997. The feeding ecology of eland in Mountain Zebra National Park. PhD thesis, University of the Witwatersrand
Weber, B. H., D. J. Depew & J. D. Smith (eds). 1988. Entropy, Energy and Evolution. New Perspectives on Physical and Biological Evolution. MIT Press, Cambridge, MA
Weber, G. E., Jeltsch, F., Rooyen, N. & Milton, S. J.. 1998. Simulated long-term vegetation response to grazing heterogeneity in semi-arid rangelands. J. Appl. Ecol. 35: 687–99CrossRefGoogle Scholar
Western, D. 1975. Water availability and its influence on the structure and dynamics of a savannah large mammal community. E. Afr. Wildl. J. 13: 265–86CrossRefGoogle Scholar
Westoby, M. 1978. What are the biological bases of varied diets?Am. Nat. 112: 627–31CrossRefGoogle Scholar
Westoby, M., Walker, B. & Noy-Meir, I.. 1989. Opportunistic management for rangelands not at equilibrium. J. Range Mgmt 42: 266–74CrossRefGoogle Scholar
White, R. G. 1983. Foraging patterns and their multiplier effects on productivity of northern ungulates. Oikos 40: 377–84CrossRefGoogle Scholar
Whyte, J., Aarde, R. & Pimm, S. L.. 1998. Managing the elephants of Kruger National Park. Anim. Conserv. 1: 77–83CrossRefGoogle Scholar
Wickstrom, M. L., Robbins, C. T., Hanley, T. A., Spalinger, D. E. & Parish, S. M.. 1984. Food intake and foraging energetics of elk and mule deer. J. Wildl. Mgmt 48: 1285–301CrossRefGoogle Scholar
Wiegand, T., Jeltsch, F., Bauer, S. & Kellner, K.. 1999. Simulation models for semi-arid rangelands of Southern Africa. Afr. J. Range Forage Sci. 15: 48–60CrossRefGoogle Scholar
Wilmshurst, J. F., Fryxell, J. M. & Bergman, C. M.. 2000. The allometry of patch selection in ruminants. Proc. R. Soc. Lond. B 267: 345–9CrossRefGoogle ScholarPubMed
Wilmshurst, J. F., Fryxell, J. M. & Colucci, P. E.. 1999a. What constrains daily intake in Thomson's gazelles?Ecology 80: 2338–47Google Scholar
Wilmshurst, J. F., Fryxell, J. M. & Hudson, R. J.. 1995. Forage quality and patch choice by wapiti. Behav. Ecol. 6: 209–17CrossRefGoogle Scholar
Wilmshurst, J. F., Fryxell, J. M., Farm, B. P., Sinclair, A. R. E. & Henschel, C. P.. 1999b. Spatial distribution of Serengeti wildebeest in relation to resources. Can. J. Zool. 77: 1223–32CrossRefGoogle Scholar
Wilson, E. O. & W. H. Bossert. 1971. A Primer of Population Biology. Sinauer, Sunderland, MA
Witter, M. S. & Cuthill, I. C.. 1993. The ecological costs of avian fat storage. Phil. Trans. Roy. Soc. Lond. B 340: 73–92CrossRefGoogle ScholarPubMed
Woods, S. C., Leely, R. J., Porte, D. & Schwartz, M. W.. 1998. Signals that regulate food intake and energy homeostasis. Science 280: 1378–83CrossRefGoogle ScholarPubMed
Woiwod, I. P. & Hanski, I.. 1992. Patterns of density dependence in moths and aphids. J. Anim. Ecol. 61: 619–29CrossRefGoogle Scholar
Wright, S. 1932. The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proc. Ⅺ Int. Congr. Genet. 1: 356–66Google Scholar
Wu, J. & Loucks, O. L.. 1995. From balance of nature to hierarchical patch dynamics: A paradigm shift in ecology. Q. Rev. Biol. 70: 439–66CrossRefGoogle Scholar
Yodzis, P. 1989. Introduction to Theoretical Ecology. Harper & Row, New York
Ziv, Y. 2000. On the scaling of habitat specificity with body size. Ecology 81: 2932–38CrossRefGoogle Scholar

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  • References
  • R. Norman Owen-Smith, University of the Witwatersrand, Johannesburg
  • Book: Adaptive Herbivore Ecology
  • Online publication: 04 February 2011
  • Chapter DOI: https://doi.org/10.1017/CBO9780511525605.015
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  • References
  • R. Norman Owen-Smith, University of the Witwatersrand, Johannesburg
  • Book: Adaptive Herbivore Ecology
  • Online publication: 04 February 2011
  • Chapter DOI: https://doi.org/10.1017/CBO9780511525605.015
Available formats
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Save book to Google Drive

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  • References
  • R. Norman Owen-Smith, University of the Witwatersrand, Johannesburg
  • Book: Adaptive Herbivore Ecology
  • Online publication: 04 February 2011
  • Chapter DOI: https://doi.org/10.1017/CBO9780511525605.015
Available formats
×