干旱区生态环境知识资源中心(Arid): Population Characteristics and Seasonal Movement Patterns of the Rattlesnake Hills Elk Herd

Arid

DOI	10.2172/765033
报告编号	PNNL-13331; EW02J1110
来源ID	OSTI_ID: 765033
	Population Characteristics and Seasonal Movement Patterns of the Rattlesnake Hills Elk Herd - Status Report 2000
	Tiller, B.L.; Zufelt, R.K.; Turner, S.; Cadwell, L.L.; Bender, L.; Turner, G.K.
英文摘要	Population characteristics of the Rattlesnake Hills elk herd indicate reduced herd growth rates from the 1980s compared to the 1990s (McCorquodale 1988; Eberhardt 1996). However, the population continued to grow approximately 25% annually through the 1990s, reaching a high of 838 animals in summer 1999. Calf recruitment rates appear to be cyclic and are likely related to reduced calf survival during the first weeks of life; however, late-term abortions may also have occurred. The cause(s) could be predator-related and/or a function of shifts in nutritional condition (age-class distributions, assuming older-age cows are less likely to recruit calves, major climate shifts) or changes in the human-related disturbances during gestation, and/or calf rearing periods. In fall 1999 and spring 2000, the population was reduced from 838 individuals to 660 individuals. The primary controlling factors were modified hunting seasons on private and state lands and the large-scale roundup conducted in spring 2000. Continued removal of animals (particularly females) within the population will be pivotal to maintain the population at a level that minimizes land damage complaints, animal-vehicle collisions, use of central Hanford areas, and deterioration of natural resources.
出版年	2000
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	29 ENERGY PLANNING, POLICY AND ECONOMY ; ANIMALS ; REARING ; POPULATION DYNAMICS ; MIGRATION ; RESOURCE MANAGEMENT
URL	http://www.osti.gov/scitech/servlets/purl/765033
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/268145
推荐引用方式 GB/T 7714	Tiller, B.L.,Zufelt, R.K.,Turner, S.,et al. Population Characteristics and Seasonal Movement Patterns of the Rattlesnake Hills Elk Herd - Status Report 2000,2000.