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Parasite infestation and predation in Darwin's small ground finch: contrasting two elevational habitats between islands

Published online by Cambridge University Press:  30 March 2010

Jody A. O'Connor
Affiliation:
School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, [email protected]
Rachael Y. Dudaniec
Affiliation:
Department of Forest Sciences, 3041-2424 Main Mall, University of British Columbia, Vancouver, BC, Canada, V6T [email protected]
Sonia Kleindorfer*
Affiliation:
School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, [email protected]
*
1Corresponding author. Email: [email protected]

Abstract:

Contrasting ecological conditions may affect the distribution, abundance and impact of parasites and predators throughout the ranges of hosts and prey. Such patterns are evident on the archipelagos of Hawaii and the Galapagos, which vary in their distribution and abundance of avian parasites within and across islands. Previous research has documented higher intensity of parasitic fly larvae (Philornis downsi) in nests of Darwin's finches on elevated islands of the Galapagos. Here we examine P. downsi intensity and predation in 71 nests of Darwin's small ground finch (Geospiza fuliginosa) on Floreana Island. We found significant differences in parasite intensity, nest predation and clutch size between the lowland (0–100 m) and highland (300–400 m) habitats. Lowland finch nests had few P. downsi parasites (mean of 8 per nest), high nest predation (44% of nests) and large clutch size (3.4). Highland finch nests showed the opposite pattern, with many P. downsi parasites (40 per nest), low nest predation (17%) and small clutch size (2.5). This study suggests that the impacts of an introduced parasite are limited by its niche requirements and resource availability within and across islands. Our findings also imply that the vulnerability of bird populations to introduced parasites and predators is linked with variation in life history strategies across habitats.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2010

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References

LITERATURE CITED

BUSH, A. O., LAFFERTY, K. D., LOTZ, J. & SHOSTAK, A. W. 1997. Parasitology meets ecology on its own terms: Margolis et al. revisited. Journal of Parasitology 83:575583.Google Scholar
CAUSTON, C. E., PECK, S. B., SINCLAIR, B. J., ROQUE-ALBELO, L., HODGSON, C. J. & LANDRY, B. 2006. Alien insects: threats and implications for conservation of Galápagos Islands. Annals of the Entomological Society of America 99:121143.CrossRefGoogle Scholar
CHASAR, A., LOISEAU, C., VALKIUNAS, G., LEZHOVA, T., SMITH, T. B. & SEHGAL, R. N. M. 2009. Prevalence and diversity patterns of avian blood parasites in degraded African rainforest habitats. Molecular Ecology 18:41214133.CrossRefGoogle ScholarPubMed
CURIO, E. 1969. Funktionsweise und Stammesgeschichte des Flugfeinderkennens einiger Darwinfinken (Geospizinae). Zeitschrift für Tierpsychologie 26:394487.CrossRefGoogle Scholar
CURRY, R. L. 1986. Whatever happened to the Floreana Mockingbird? Noticias de Galápagos 43: 1315.Google Scholar
DUDANIEC, R. Y., FESSL, B. & KLEINDORFER, S. 2006. Effects of the introduced ectoparasite Philornis downsi on haemoglobin level and nestling survival of in Darwin's Small Ground Finch (Geospiza fuliginosa). Austral Ecology 31:8894.CrossRefGoogle Scholar
DUDANIEC, R. Y., KLEINDORFER, S. & FESSL, B. 2007. Interannual and interspecific variation in intensity of the parasitic fly, Philornis downsi, in Darwin's finches. Biological Conservation 139:325332.CrossRefGoogle Scholar
DUDANIEC, R. Y., GARDNER, M. G., DONELLAN, S. & KLEINDORFER, S. 2008. Genetic variation in the invasive avian parasite, Philornis downsi (Diptera, Muscidae) on the Galápagos archipelago. BMC Ecology 8: article 13, doi:10.1186/1472-6785-8-13.CrossRefGoogle ScholarPubMed
DUDANIEC, R. Y., GARDNER, M. G. & KLEINDORFER, S. 2009. Offspring genetic structure reveals mating and nest infestation behaviour of an invasive parasitic fly (Philornis downsi) of Galápagos birds. Biological Invasions doi:10.1007/s10530-009-9464-x.Google Scholar
FESSL, B. & TEBBICH, S. 2002. Philornis downsi – a recently discovered parasite on the Galápagos Archipelago – a threat for Darwin's finches? Ibis 144:445451.CrossRefGoogle Scholar
FESSL, B., SINCLAIR, B. J. & KLEINDORFER, S. 2006a. The life-cycle of Philornis downsi (Diptera: Muscidae) parasitizing Darwin's finches and its impacts on nestling survival. Parasitology 133:739747.CrossRefGoogle ScholarPubMed
FESSL, B., KLEINDORFER, S. & TEBBICH, S. 2006b. An experimental study of the fitness costs of Philornis downsi in Darwin's ground finches. Biological Conservation 127:5561.CrossRefGoogle Scholar
FREED, L. A., CANN, R. L., GOFF, M. L., KUNTZ, W. A. & BODENR, G. R. 2005. Increase in avian malaria at upper elevation in Hawai'i. Condor 107:753764.Google Scholar
GALLIGAN, T. H. & KLEINDORFER, S. (in press). Naris and beak malformation caused by the parasitic fly, Philornis downsi (Diptera: Muscidae), in Darwin's small ground finch, Geospiza fuliginosa (Passeriformes: Emberizidae). Biological Journal of the Linnean Society 98:577585.Google Scholar
GARANT, D., KRUUK, L. E. B., MCCLERY, R. H. & SHELDON, B. C. 2007. The effects of environmental heterogeneity on multivariate selection on reproductive traits in female great tits. Evolution 61:15461559.CrossRefGoogle ScholarPubMed
GILL, F. B. & STOKES, C. 1971. Predation on a netted bird by smooth-billed ani. The Wilson Bulletin 83:101102.Google Scholar
GRANT, P. R. 1999. Ecology and evolution of Darwin's finches. (Second edition). Princeton University Press, Princeton. 492 pp.Google Scholar
HICKS, D. J. & MAUCHAMP, A. 1995. Size dependent predation by feral mammal on Galápagos Opuntia. Noticias de Galápagos 55:1517.Google Scholar
HOCHBERG, M. E. & MØLLER, A. P. 2001. Insularity and adaptation in coupled victim-enemy associations. Journal of Evolutionary Biology 14:539551.Google Scholar
KLEINDORFER, S. 2007a. The ecology of clutch size variation in Darwin's small ground finch Geospiza fuliginosa: comparison between lowland and highland habitats. Ibis 149:730741.CrossRefGoogle Scholar
KLEINDORFER, S. 2007b. Nesting success in Darwin's small tree finch (Camarhynchus parvulus): evidence of female preference for older males and more concealed nests. Animal Behaviour 74:795804.CrossRefGoogle Scholar
KLEINDORFER, S. & DUDANIEC, R. Y. 2006. Increasing prevalence of avian poxvirus in Darwin's finches and its effect on male pairing success. Journal of Avian Biology 37:6976.Google Scholar
KLEINDORFER, S. & DUDANIEC, R. Y. 2009. Love thy neighbour? Social nesting pattern, host mass, and nest size affect ectoparasite intensity in Darwin's tree finches. Behavioral Ecology and Sociobiology 63:731739.Google Scholar
KLEINDORFER, S. & MITCHELL, J. G. 2009. Biological networks: rainforests, coral reefs, and the Galapagos Islands. Pp. 85104 in Kleindorfer, P. R. & Wind, J. (eds.). The network challenge: strategy, profit, and risk in an interlinked world. Wharton School Publishing, Pennsylvania.Google Scholar
KLEINDORFER, S., CHAPMAN, T., WINKLER, H. & SULLOWAY, F. J. 2006. Adaptive divergence in contiguous populations of Darwin's small ground finch (Geospiza fuliginosa). Evolutionary Ecology Research 8:357372.Google Scholar
KLEINDORFER, S., SULLOWAY, F. J. & O'CONNOR, J. 2009. Mixed species nesting associations in Darwin's tree finches: nesting pattern predicts breeding performance. Biological Journal of the Linnean Society 98:313324.CrossRefGoogle Scholar
LOOPE, L. L., HOWARTH, F. G., KRAUS, F. & PRATT, T. K. 2001. Newly emergent and future threats of alien species to pacific birds and ecosystems. Studies in Avian Biology 22:291304.Google Scholar
MARTIN, J., THIBAULT, J. & BRETAGNOLLE, V. 2000. Black rats, island characteristics, and colonial nesting birds in the Mediterranean: consequences of an ancient introduction. Conservation Biology 14:14521466.CrossRefGoogle Scholar
MURRAY, B. G. 2001. The evolution of passerine life histories on oceanic islands, and its implications for the dynamics of population decline and recovery. Studies in Avian Biology 22:281290.Google Scholar
O'CONNOR, J. A., ROBERTSON, J. & KLEINDORFER, S. in press, a. Video analysis of host-parasite interactions in Darwin's finch nests. Oryx.Google Scholar
O'CONNOR, J. A., SULLOWAY, F. J., ROBERTSON, J. & KLEINDORFER, S. in press, b. Philornis downsi parasitism is the primary cause of nestling mortality in the critically endangered Darwin's medium tree finch (Camarhynchus pauper). Biodiversity and Conservation. doi:10.1007/s10531-009-9740-1.Google Scholar
OLIVARES, A. & MUNVES, J. A. 1973. Predatory behaviour of the smooth-billed ani. The Auk 90:891.Google Scholar
RICHNER, H. & HEEB, P. 1995. Are clutch and brood size patterns in birds shaped by ectoparasites? Oikos 73:435441.CrossRefGoogle Scholar
SKUTCH, A. F. 1985. Clutch size, nesting success, and predation on nests of neotropical birds, reviewed. Ornithological Monographs 36:575594.Google Scholar
SLAGSVOLD, T. 1982. Clutch size variation in passerine birds: the nest predation hypothesis. Oecologia 54:159169.CrossRefGoogle ScholarPubMed
VAN RIPER, C., VAN RIPER, S. G., GOFF, M. L. & LAIRD, M. 1986. The epizootiology and ecological significance of malaria in Hawaiian (USA) land birds. Ecological Monographs 56:327344.CrossRefGoogle Scholar
WIEDENFELD, D. A., JIMÉNEZ, G. A., FESSL, B., KLEINDORFER, S. & VALAREZO, J. C. 2007. Distribution of the introduced parasitic fly Philornis downsi (Diptera, Muscidae) in the Galápagos Islands. Pacific Conservation Biology 13:1419.CrossRefGoogle Scholar
WIKELSKI, M., FOUFOPOULOS, J., VARGAS, H. & SNELL, H. 2004. Galápagos birds and diseases: invasive pathogens as threats for island species. Ecology and Society. 9: article 5 [online] URL: http://www.ecologyandsociety.org/vol9/iss1/art5 (accessed: 02.02.09)CrossRefGoogle Scholar
WILES, G. J., BART, J., BECK, R. E. & AGUON, C. F. 2003. Impacts of the brown tree snake: patterns of decline and species persistence in Guam's avifauna. Conservation Biology 17:13501360.Google Scholar