Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Master → Etats Unis → 2020 → Influence of Habitat Heterogeneity and Water Sources on Kill Site Locations and Puma Prey Composition

New Mexico State University (2020)

Influence of Habitat Heterogeneity and Water Sources on Kill Site Locations and Puma Prey Composition

Prude, Charles Hunter

Titre : Influence of Habitat Heterogeneity and Water Sources on Kill Site Locations and Puma Prey Composition

Auteur : Prude, Charles Hunter

Université de soutenance : New Mexico State University

Grade : Master of Science in Wild Science 2020

Résumé
Habitat heterogeneity and the availability of man-made water sources influence puma diet composition and the location of kill sites in the arid regions of the southwestern United States. To determine if habitat heterogeneity and corresponding prey diversity influence puma diet composition, puma diet was examined in New Mexico, at sites representing riparian areas adjacent to the Rio Grande and xeric Chihuahuan Desert uplands. We determined seasonal prey composition and describe differences in prey composition between pumas occupying distinct cover types. Prey composition varied, with more ungulate prey being consumed by pumas inhabiting the upland desert areas and more aquatic prey consumed in the riparian bosque. The diverse diets of the pumas inhabiting the heterogeneous habitats in southcentral New Mexico provides additional evidence supporting that pumas have broad diets that are strongly influenced by the habitat and prey community that their home range encompasses. To determine if man-made water sources influence puma habitat use and kill site locations, puma diet data was compiled from seven study areas in the Chihuahuan and Sonoran deserts. The proximities of ungulate kill sites to man-made water sources were compared with point locations generally available within puma home ranges. Mixed effects logistic regression was used to determine if the probability of a site being a kill location was related to the proximity to water sources and or other habitat characteristics. While pumas did not appear to be exploiting the predictable prey visitation of man-made water sources, they were capitalizing on restricted distribution of prey within 5 km of water sources. At the home range scale, puma use areas proximate to water sources that likely have increased prey abundance and higher probabilities of encountering prey for hunting. Within their home ranges, pumas also select fine scale habitat features, such as woody cover, that enhance their ability to stalk, ambush, and effectively kill prey.

Présentation

Aperçu du document (ProQuest)

Page publiée le 3 décembre 2021