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The influence of Hymenolepis diminuta on the survival and fecundity of the intermediate host, Tribolium confusum

Published online by Cambridge University Press:  06 April 2009

Anne E. Keymer
Anne E. Keymer
Affiliation:
Department of Zoology, Imperial College, Prince Consort Road, London SW7 2BB
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Summary

An experimental study of the effects of parasitism by H. diminuta on the intermediate host, Tribolium confusum, is described. No density- dependent constraints on parasite establishment within individual hosts are evident, although a reduction in cysticercoid size at high parasite burdens is demonstrated. The relationship between parasite burden, host mortality and host fecundity is investigated. Host mortality is linearly related to parasite burden, whereas the relationship between parasite burden and host fecundity is non-linear. There is no difference in viability between eggs from infected and uninfected females. The generative causes of these effects are not investigated experimentally, although it is postulated that survival is related to the degree of damage to the midgut wall caused by parasite penetration, and fecundity to the biomass of parasites harboured by the host. The significance of these effects is discussed in relation to the overall dynamics of the host-parasite association.

Type
Research Article
Information
Parasitology , Volume 81 , Issue 2 , October 1980 , pp. 405 - 421
Copyright
Copyright © Cambridge University Press 1980

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