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Accueil du site → Master → Etats Unis → 1989 → Desert bighorn sheep and nutritional carrying capacity in Pusch Ridge Wilderness, Arizona

University of Arizona (1989)

Desert bighorn sheep and nutritional carrying capacity in Pusch Ridge Wilderness, Arizona

Mazaika, Rosemary

Titre : Desert bighorn sheep and nutritional carrying capacity in Pusch Ridge Wilderness, Arizona

Auteur : Mazaika, Rosemary

Université de soutenance : University of Arizona

Grade : Master of Science 1989

Résumé
The number of desert bighorn sheep (Ovis canadensis mexicana) in Pusch Ridge Wilderness (PRW), Santa Catalina Mountains, Arizona has declined to between 50 and 100 animals. Sheep have restricted movements to the southwest corner of PRW. I developed a model based on nitrogen (N) content of forage and forage quantity to measure seasonal changes in nutritional carrying capacity of sheep use areas in PRW. Forage based estimates of animals numbers were greater for April to September than for October to March. My study suggests that forage is not limiting desert bighorn sheep in PRW and illustrates the potential to support more desert bighorn sheep in PRW than the current population. Seasonal fluctuations in range productivity should be examined in relation to human disturbances proximal to desert bighorn sheep habitat and fire management programs for PRW.

Mots clés : Bighorn sheep – Feeding and feeds. ; Desert animals – Arizona – Santa Catalina Mountains.

Présentation

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Page publiée le 3 juin 2013, mise à jour le 21 février 2018