干旱区生态环境知识资源中心(Arid): Population ecology and survivorship of San Joaquin antelope squirrels in grazed and control plots in the San Joaquin Desert of California

Arid

DOI	10.51492/cfwj.cesasi.20
	Population ecology and survivorship of San Joaquin antelope squirrels in grazed and control plots in the San Joaquin Desert of California
	Germano, David J.; Saslaw, Lawrence R.; Rathbun, Galen B.; Cypher, Brian L.
通讯作者	Germano, DJ (corresponding author), Calif State Univ, Dept Biol, Bakersfield, CA 93311 USA.
来源期刊	CALIFORNIA FISH AND GAME
ISSN	0008-1078
EISSN	2331-0405
出版年	2021
卷号	107 页码:329-344
英文摘要	The San Joaquin antelope squirrel (Ammospermophilus nelsoni) is endemic to the San Joaquin Desert of California. It has been listed as Threatened by the state of California since 1980 due to profound habitat loss, but a paucity of information could limit conservation efforts for this species. We examined data collected each August during 1997-2006 to determine whether A. nelsoni population attributes differed between grazed and ungrazed study plots. We found that sex ratios, mean weights, percentage of reproductive males, number of young, yearly survival, longevity, overall survivorship, and population growth trajectories all were similar between grazed and ungrazed plots. In general, sex ratios were even, males were heavier than females, some males were reproductive in August (although most females were not), and the number of young was inversely related to residual dry matter. We also found that we captured most individuals only once, but we captured a few squirrels for up to for 5 years, and the populations on both grazed and ungrazed plots were growing during the 10-year study. Our study was only the second long-term investigation of this species and the information is needed for further conservation and recovery efforts.
英文关键词	Ammospermophilus nelsoni conservation reproduction sex ratios survival sex ratios
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000672513100021
WOS关键词	SURVIVAL ; VALLEY ; MARK
WOS类目	Fisheries ; Zoology
WOS研究方向	Fisheries ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362763
作者单位	[Germano, David J.] Calif State Univ, Dept Biol, Bakersfield, CA 93311 USA; [Saslaw, Lawrence R.; Cypher, Brian L.] Calif State Univ Stanislaus, Endangered Species Recovery Program, One Univ Circle, Turlock, CA 95382 USA; [Rathbun, Galen B.] Calif Acad Sci, Inst Biodivers Sci & Sustainabil, San Francisco, CA 94118 USA
推荐引用方式 GB/T 7714	Germano, David J.,Saslaw, Lawrence R.,Rathbun, Galen B.,et al. Population ecology and survivorship of San Joaquin antelope squirrels in grazed and control plots in the San Joaquin Desert of California[J],2021,107:329-344.
APA	Germano, David J.,Saslaw, Lawrence R.,Rathbun, Galen B.,&Cypher, Brian L..(2021).Population ecology and survivorship of San Joaquin antelope squirrels in grazed and control plots in the San Joaquin Desert of California.CALIFORNIA FISH AND GAME,107,329-344.
MLA	Germano, David J.,et al."Population ecology and survivorship of San Joaquin antelope squirrels in grazed and control plots in the San Joaquin Desert of California".CALIFORNIA FISH AND GAME 107(2021):329-344.