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The effect of parasites on wildlife

Authors :
Borgsteede, F.H.M.
Source :
Veterinary Quarterly; October 1996, Vol. 18 Issue: Supplement 3 p138-140, 3p
Publication Year :
1996

Abstract

SummaryPopulations of animals which live in the wild are regulated by many biotic and abiotic factors. Parasites are one of the biotic factors. Parasites may influence their hosts in different ways. They may cause the death of the host due to a direct lethal effect or an indirect effect. Direct lethal effects may occur if killing is a part of the life cycle of the parasite or if hosts and parasites have not developed an equilibrium. The introduction of hosts or parasites into a new environment with suitable hosts or parasites is an example. Death by parasitism may also be caused by a combination of the emaciating effects of parasites combined with factors such as bad weather conditions, environmental pollution or human handling. Parasites may also influence the behaviour of their hosts. If the hosts are intermediate hosts in the life cycle of the parasites, the alterations in behaviour may make them an easier prey for their predators, the final hosts. Parasites may also influence the reproductive success of the hosts. In this respect the relationship between the red grouse (Lagopus lagopus scoticus) and the caecal nematode Trichostrongylus tenuishas been well worked out.

Details

Language :
English
ISSN :
01652176 and 18755941
Volume :
18
Issue :
Supplement 3
Database :
Supplemental Index
Journal :
Veterinary Quarterly
Publication Type :
Periodical
Accession number :
ejs26081179
Full Text :
https://doi.org/10.1080/01652176.1996.9694717