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

Accueil du site → Master → Etats Unis → 2005 → Population demographics and spatial characteristics of Gambel’s quail in the Chihuahuan Desert, Texas

Sul Ross State University (2005)

Population demographics and spatial characteristics of Gambel’s quail in the Chihuahuan Desert, Texas

Gray, Michael T

Titre : Population demographics and spatial characteristics of Gambel’s quail in the Chihuahuan Desert, Texas

Auteur : Gray, Michael T

Université de soutenance : Sul Ross State University

Grade : Master of Science (MS) 2005

Résumé
Gambel’s quail (Callipepla gambelii ) are understudied gamebirds of the western U.S. Despite its gamebird status in Texas, there is no scientific information about Gambel’s quail populations in Texas. Therefore I initiated a study to describe the composition of populations, survival rates, cause-specific mortalities, and to compare sampling techniques. I also described ranges and habitat use of Gambel’s quail in the Trans-Pecos. Age and sex ratios, as well as, productivity were highly variable between years and study sites, but were within limits reported for other New World quail. Annual survival rates ranged from 16 to 40%. Avian raptors made greater contributions to mortality of radiomarked quail than did mammalian predators. Survival rates indicated that trap samples gave a closer relative estimation of the composition of the population than did shot samples. Range estimates exceeded previous reports from other states. Ranges were greater on the upland study site than on the river study site. Gambel’s quail selected for riparian zones on both study areas ( P = 0.0001). Although on the river study area riparian habitat was used in greater proportion than its availability, selection was higher for native riparian zones (S = 1.90) than salt cedar (Tamarix spp.) riparian zones (S = 1.66). Wildlife biologists should encourage juvenile survival through reducing microclimatic conditions and maintaining overhead screening cover. Riparian zones should be protected because they are critical habitats of Gambel’s quail in west Texas

Mots clés : Ecology, Zoology, Biological sciences, Forestry

Search Oxford Libraries Online (SOLO)

ProQuest Dissertations and Theses

Page publiée le 23 avril 2015, mise à jour le 15 janvier 2019