Distribution of grizzly bears in the Greater Yellowstone Ecosystem in 2004

Autor:	Charles C. Schwartz, Kerry A. Gunther, Mark A. Haroldson, Dave Moody
Rok vydání:	2006
Předmět:	Ecology business.industry Range (biology) Grizzly Bears Wildlife Distribution (economics) Management Monitoring Policy and Law organization organization.mascot Ursus arctos horribilis Geography Habitat Animal Science and Zoology Ecosystem business Nature and Landscape Conservation Sampling bias
Zdroj:	Ursus. 17:63-66
ISSN:	1938-5439 1537-6176
Popis:	The US Fish and Wildlife Service (USFWS) proposed delisting the Yellowstone grizzly bear (Ursus arctos horribilis) in November 2005. Part of that process required knowledge of the most current distribution of the species. Here, we update an earlier estimate of occupied range (1990–2000) with data through 2004. We used kernel estimators to develop distribution maps of occupied habitats based on initial sightings of unduplicated females (n = 481) with cubs of the year, locations of radiomarked bears (n = 170), and spatially unique locations of conflicts, confrontations, and mortalities (n = 1,075). Although each data set was constrained by potential sampling bias, together they provided insight into areas in the Greater Yellowstone Ecosystem (GYE) currently occupied by grizzly bears. The current distribution of 37,258 km2 (1990–2004) extends beyond the distribution map generated with data from 1990–2000 (34,416 km2). Range expansion is particularly evident in parts of the Caribou–Targhee National F...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::09f45735b8ad146d9058a1000959fef3 https://doi.org/10.2192/1537-6176(2006)17[63:dogbit]2.0.co Zobrazit plný text záznamu