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Predator dietary response to prey density variation and consequences for cestode transmission

Identifieur interne : 000518 ( Main/Exploration ); précédent : 000517; suivant : 000519

Predator dietary response to prey density variation and consequences for cestode transmission

Auteurs : Francis Raoul [France] ; Peter Deplazes [Suisse] ; Dominique Rieffel [France] ; Jean-Claude Lambert [France] ; Patrick Giraudoux [France]

Source :

Oecologia [ 0029-8549 ] ; 2010.

RBID : Pascal:10-0432561

Descripteurs français

Pascal (Inist)
- Prédateur, Régime alimentaire, Proie, Densité, Transmission, Parasite, Contamination, Cestoda, Microtus arvalis, Arvicola terrestris, Vulpes vulpes.

English descriptors

KwdEn :
- Arvicola terrestris, Cestoda, Contamination, Density, Diet, Microtus arvalis, Parasite, Predator, Prey, Transmission, Vulpes vulpes.

Abstract

The functional response of predators to prey density variations has previously been investigated in order to understand predation patterns. However, the consequences of functional response on parasite transmission remain largely unexplored. The rodents Microtus arvalis and Arvicola terrestris are the main prey of the red fox Vulpes vulpes in eastern France. These species are intermediate and definitive hosts of the cestode Echinococcus multilocularis. We explored the dietary and contamination responses of the red fox to variations in prey density. The dietary response differed between the two prey species: no response for M. arvalis and a type III-like (sigmoidal) response for A. terrestris that shows possible interference with M. arvalis. The fox contamination response followed a type II shape (asymptotic) for both species. We conclude that fox predation is species specific and E. multilocularis transmission is likely to be regulated by a complex combination of predation and immunologic factors. These results should provide a better understanding of the biological and ecological mechanisms involved in the transmission dynamics of trophically transmitted parasites when multiple hosts are involved. The relevance of the models of parasite transmission should be enhanced if non-linear patterns are taken into account.

Affiliations:

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<term>Parasite</term>
<term>Contamination</term>
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<front><div type="abstract" xml:lang="en">The functional response of predators to prey density variations has previously been investigated in order to understand predation patterns. However, the consequences of functional response on parasite transmission remain largely unexplored. The rodents Microtus arvalis and Arvicola terrestris are the main prey of the red fox Vulpes vulpes in eastern France. These species are intermediate and definitive hosts of the cestode Echinococcus multilocularis. We explored the dietary and contamination responses of the red fox to variations in prey density. The dietary response differed between the two prey species: no response for M. arvalis and a type III-like (sigmoidal) response for A. terrestris that shows possible interference with M. arvalis. The fox contamination response followed a type II shape (asymptotic) for both species. We conclude that fox predation is species specific and E. multilocularis transmission is likely to be regulated by a complex combination of predation and immunologic factors. These results should provide a better understanding of the biological and ecological mechanisms involved in the transmission dynamics of trophically transmitted parasites when multiple hosts are involved. The relevance of the models of parasite transmission should be enhanced if non-linear patterns are taken into account.</div>
</front>
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Predator dietary response to prey density variation and consequences for cestode transmission

Predator dietary response to prey density variation and consequences for cestode transmission

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri