Continent‐wide differences in diet breadth of large terrestrial carnivores: the effect of large prey and competitors
Rattachement africain : it, ar, au, Afrique du Sud, gb. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Despite their importance for understanding consumer‐resource dynamics, the dietary responses of large terrestrial predators to variations in prey richness and competition pressure are unclear. While a greater predator selectivity along with increasing prey abundance would be expected under an optimal foraging scenario, there is some evidence that predators may broaden their diet where there is a greater resource diversity. Furthermore, the use of large prey may be limited by increasing presence of competitors. We considered three widespread large carnivores (the grey wolf Canis lupus, the puma Puma concolor and the leopard Panthera pardus), whose distribution range encompasses different continents, with different communities of prey/competitors. We expected that the potential to modulate their use of large prey according to prey richness would vary according to different levels of potential competition. We collated data from more than 240 studies of the diets of wolf, puma and leopard to model whether the relationships between the diversity of used large prey (i.e. the Large Prey Index) and prey richness was modulated by carnivore richness, in different continents. The wolf showed an increase in the Large Prey Index with prey richness across its distribution range, where it is usually the apex predator in areas from which data are available. Conversely, the leopard showed this pattern in Asia, but not in Africa, where it often coexists with a greater array of potential competitors. For the puma, the Large Prey Index increased with prey richness throughout its distribution range, except in the areas where the larger and dominant jaguar also occurred. By emphasising the complex relationships between prey richness and predator diets, our results testify to the suppressive effects of larger competitors over the use of large prey by subordinate carnivores.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Continent‐wide differences in diet breadth of large terrestrial carnivores: the effect of large prey and competitors
- Date Crossref
- 08/02/2024
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
University of Siena Research Unit of Behavioural Ecology pays non établi dans la noticeUniversité ou école supérieure
-
University of Palermo pays non établi dans la noticeUniversité ou école supérieure
-
Museo di Storia Naturale della Maremma pays non établi dans la noticeInstitution
-
Consejo Nacional de Investigaciones Científicas y Técnicas pays non établi dans la noticeOrganisme public
-
Universidad Nacional del Sur pays non établi dans la noticeUniversité ou école supérieure
-
University of Newcastle Australia pays non établi dans la noticeUniversité ou école supérieure
-
Nelson Mandela University Centre for African Conservation Ecology Port Elizabeth, Afrique du Sud (code pays fourni par la source)Université ou école supérieure
-
Durham University Conservation Ecology Group pays non établi dans la noticeUniversité ou école supérieure
-
NBFC pays non établi dans la noticeInstitution
-
Maremma Natural History Museum Strada Corsini 5 58100 Grosseto Italy pays non établi dans la noticeInstitution
-
INBIOSUR (Instituto de Investigaciones Biológicas y Biomédicas del Sur) CONICET Laboratorio de Fisiología Animal pays non établi dans la noticeStructure de recherche
-
School of Environmental and Life Sciences University of Newcastle Callaghan NSW 2308 Australia Conservation Biology Research Group pays non établi dans la noticeUniversité ou école supérieure
Research Unit of Behavioural Ecology — University of Siena, University of Palermo et Museo di Storia Naturale della Maremma, avec 9 autres affiliations. Pays d’affiliation : Afrique du Sud.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.