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Age structure of a population of Ixodes ricinus (Acari: Ixodidae) in relation to its seasonal questing

Published online by Cambridge University Press:  09 March 2007

A.R. Walker
A.R. Walker*
Affiliation:
Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin EH25 9RG, Scotland, UK
*
*Fax: 0131 445 5099 E-mail: [email protected]
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Abstract

Three sites in south west Scotland, each having one deciduous and one coniferous woodland with populations of roe deer, were sampled over three years for Ixodes ricinus Linnaeus ticks using cloth drags. Nymphs and adult ticks were age graded by dissection of gut and Malpighian tubules and staining for lipid with Sudan red. Temperature and relative humidity were recorded in developmental and questing microclimates. Two annual cohorts of both nymphs and adults were found. For both instars one cohort became apparent in early spring and the other in autumn. The timing of the cohorts of nymphs corresponded to peaks of numbers questing, but neither females nor males had any clear seasonal pattern of questing. The maximum life of questing nymphs and adults was three to four months. Nymphs and adults were found questing at all months of the year and at temperatures ranging from 3.5°C to 29.3°C. Questing of larvae in summer peaks of numbers was positively correlated with temperature and negatively correlated with relative humidity. These results are explained by a descriptive model which invokes behavioural and morphogenetic diapause. Tests of the model are discussed and it is proposed that the main adaptive advantage of the complex life cycle is to permit moulting and oviposition to occur at favourable summer temperatures in ticks that have engorged at any time of the year.

Type
Review Article
Information
Bulletin of Entomological Research , Volume 91 , Issue 1 , February 2001 , pp. 69 - 78
Copyright
Copyright © Cambridge University Press 2001

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References

Abdul-Amir, I.M. & Gray, J.S. (1987) Resistance of sheep to laboratory infestations of the tick Ixodes ricinus. Research in Veterinary Science 43, 266–267.CrossRefGoogle ScholarPubMed
Alberdi, M.P., Walker, A.R., Paxton, E.A. & Sumption, K.J. (1998) Natural prevalence of infection with Erhlichia phagocytophila of Ixodes ricinus in Scotland. Veterinary Parasitology 78, 203–213.CrossRefGoogle Scholar
Alberdi, M.P., Walker, A.R. & Urquhart, K.A. (2000) Field evidence that roe deer (Capreolus capreolus) are a natural host for Ehrlichia phagocytophila. Epidemiology and Infection 124, 315–323.CrossRefGoogle ScholarPubMed
Amosova, L.I. (1978) Fine structure of the fat body in ixodid ticks Hyalomma asiaticum. Trudy Zoologicheskogo Instituta Academiya Nauk SSSR 77, 61–69 (in Russian, translation 1348 United States Naval Medical Research Unit No. 3).Google Scholar
Bancroft, J.D. & Stevens, A (1982) Theory and practice of histological techniques. 662 pp. Edinburgh, Churchill Livingston.Google Scholar
Belozerov, V.N. (1967) Larval diapause in the tick Ixodes ricinus and its relation to external conditions. IV. Interactions between exogenous and endogenous factors in the control of the larval diapause. Entomological Review 46, 447–451.Google Scholar
Belozerov, V.N. (1971) Nymphal diapause in the tick Ixodes ricinus. IV Influence of changes in photoperiodic regime of unfed nymphs on their aggressiveness. Parazitologiya 5, 3–6.Google Scholar
Belozerov, V.N. (1971) Egg diapause in Ixodes ricinus and its relation to the photoperiodic conditions of maintenance of unfed females. Vestnik Leningradskogo Universiteta, Biologiya 9, 33–37.Google Scholar
Belozerov, V.N. (1982) Diapause and biological rhythms in ticks. pp. 469–500 in Obenchain, F.D. & Galun, R. (Eds) Physiology of ticks. Oxford, Pergamon Press.CrossRefGoogle Scholar
Daniel, M., Cerny, V., Dusbabek, F., Honzakova, E. & Olejnicek, J. (1976) Influence of microclimate on the life cycle of the common tick Ixodes ricinus in thermophilic oak forest. Folia Parasitologia 23, 327–335.Google ScholarPubMed
Daniel, M., Cerny, V., Dusbabek, F., Honzakova, E. & Olejnicek, J. (1977) Influence of microclimate on the life cycle of the common tick Ixodes ricinus in an open area in comparison with forest habitats. Folia Parasitologia 24, 149–158.Google Scholar
Detinova, T.S. (1968) Age structure of insect populations of medical importance. Annual Review of Entomology 13, 427–450.CrossRefGoogle Scholar
Edwards, E.E. (1948) The seasonal activity of the tick Ixodes ricinus in Wales. Parasitology 38, 72–85.CrossRefGoogle Scholar
Gardiner, W.P. & Gettinby, G. (1983) A weather based prediction model for the life cycle of the sheep tick, I. ricinus. Veterinary Parasitology 13, 77–84.CrossRefGoogle Scholar
Gray, J.S. (1981) The fecundity of Ixodes ricinus and the mortality of its developmental stages under field conditions. Bulletin of Entomological Research 71, 533–542.CrossRefGoogle Scholar
Gray, J.S. (1982) The development and questing activity of Ixodes ricinus under field conditions in Ireland. Bulletin of Entomological Research 72, 263–270.CrossRefGoogle Scholar
Gray, J.S. (1985) Studies on the larval activity of the tick Ixodes ricinus in Co. Wicklow, Ireland. Experimental and Applied Acarology 1, 307–316.CrossRefGoogle ScholarPubMed
Gray, J.S. (1987) Mating and behavioural diapause in Ixodes ricinus. Experimental and Applied Acarology 3, 61–71.CrossRefGoogle ScholarPubMed
Gray, J.S (1991) The development and seasonal activity of the tick Ixodes ricinus: a vector of Lyme borreliosis. Review of Medical and Veterinary Entomology 97, 323–333.Google Scholar
MacLeod, J. (1934) Ixodes ricinus in relation to its physical environment: the influence of climate on development. Parasitology 26, 282–305.CrossRefGoogle Scholar
MacLeod, J. (1935) Ixodes ricinus in relation to its physical environment. II The factors governing survival and activity. Parasitology 27, 123–144.CrossRefGoogle Scholar
MacLeod, J. (1936) Ixodes ricinus in relation to its physical environment. IV An analysis of the ecological complexes controlling distribution and activities. Parasitology 28, 298–319.CrossRefGoogle Scholar
MacLeod, J. (1939) The seasonal and annual incidence of the sheep tick Ixodes ricinus in Britain. Bulletin of Entomological Research 30, 103–118.CrossRefGoogle Scholar
Milne, A. (1943) The comparison of sheep tick populations (Ixodes ricinus). Annals of Applied Biology 30, 240–250.CrossRefGoogle Scholar
Milne, A. (1945) The ecology of the sheep tick Ixodes ricinus; the seasonal activity in Britain with particular reference to northern England. Parasitology 36, 142–152.CrossRefGoogle Scholar
Randolph, S.E. (1975) Seasonal dynamics of a host–parasite system: Ixodes trianguliceps and its small mammal hosts. Journal of Animal Ecology 44, 425–449.CrossRefGoogle Scholar
Randolph, S.E. (1997) Abiotic and biotic factors determinants of the seasonal dynamics of the tick Rhipicephalus appendiculatus in South Africa. Medical and Veterinary Entomology 11, 25–37.CrossRefGoogle ScholarPubMed
Razumova, I.V. (1977) Physiological age of adult ixodid ticks and a rapid method for its determination. Meditsinskaya Parazitologiya i Parazitarnye Bolezni Moskva 46, 557–566 (in Russian, translation 1409 of United States Naval Medical Research Unit 3).Google Scholar
Sonenshine, D.E. (1993) Biology of ticks, Vol. 2. Oxford University Press, Oxford.Google Scholar
Staines, B.W. & Ratcliffe, P.R. (1991) Roe deer. pp. 518–525 in Corbet, G.B. & Harris, S. (Eds) The handbook of British mammals. Oxford, Blackwell Science Ltd.Google Scholar
Steele, G.M. & Randolph, S.E. (1985) An experimental evaluation of conventional control measures against the sheep tick Ixodes ricinus. I. A unimodal seasonal activity pattern. Bulletin of Entomological Research 75, 489–499.CrossRefGoogle Scholar
Uspensky, I. (1995) Physiological age of ixodid ticks: aspects of its determination and application. Journal of Medical Entomology 32, 751–764.CrossRefGoogle ScholarPubMed
Walker, A.R. & Fletcher, J.D. (1985) Age grades and infection rates of Rhipicephalus appendiculatus to assess theileriosis challenge in the field. Bulletin of Entomological Research 75, 653–660.CrossRefGoogle Scholar
Walker, A.R., Fletcher, J.D., McKellar, S.B., Bell, L.J. & Brown, C.G.D. (1985) The maintenance and survival of Theileria annulata in colonies of Hyalomma anatolicum anatolicum. Annals of Tropical Medicine and Parasitology 79, 199–209.CrossRefGoogle ScholarPubMed
Walker, A.R., Fletcher, J.D. & Todd, L. (1990) Cross resistance between instars of the tick Rhipicephalus appendiculatus fed on rabbits and cattle. Journal of Medical Entomology 27, 955–961.CrossRefGoogle Scholar
Wheler, E.G. (1899) Proceedings of the Royal Agricultural Society of England 4, 626.Google Scholar
Yuval, B. & Spielman, A. (1990) Duration and regulation of the developmental cycle of Ixodes dammini. Journal of Medical Entomology 27, 196–201.CrossRefGoogle ScholarPubMed