Arid
DOI10.2307/3802334
Importance of observer experience in finding desert tortoises
Freilich, JE; LaRue, EL
通讯作者Freilich, JE
来源期刊JOURNAL OF WILDLIFE MANAGEMENT
ISSN0022-541X
出版年1998
卷号62期号:2页码:590-596
英文摘要

Because surveys for the desert tortoise (Gopherus agassizii) are usually conducted by experienced observers, we conducted 2 experiments in which observers of differing experience levels searched for desert tortoises and tortoise "sign" (burrows, seat) in replicated 1-ha plots. Each plot was seeded with a known number of tortoise seat, realistic-looking tortoise burrows, and 9 lifelike styrofoam tortoises of 3 size classes. When observers were divided into 2 groups, experienced and inexperienced, the groups did not differ (P greater than or equal to 0.17) in their ability to find tortoises of several size classes, total tortoises, seat, or burrows. Additional analyses divided experience into novice, beginner intermediate, and advanced levels based on previous survey experience. Again, tortoise-finding was unaffected tn experience level (Ps > 0.15). Observers overestimated numbers of burrows, mistakenly counted holes made by other animals, and consistently found fewer tortoises and seat than were actually seeded in plots, Tortoise-finding skill is probably part inclination and part aptitude, We cannot say which factors may affect a person’s ability to find tortoises, but previous experience, in these experiments, did not.


英文关键词desert tortoise Gopherus agassizii observer bias observer experience sampling survey design
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000073175200017
WOS关键词BEHAVIOR
WOS类目Ecology ; Zoology
WOS研究方向Environmental Sciences & Ecology ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/136321
作者单位(1)Circle Mtn Biol Consultants, Wrightwood, CA 92397 USA
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Freilich, JE,LaRue, EL. Importance of observer experience in finding desert tortoises[J],1998,62(2):590-596.
APA Freilich, JE,&LaRue, EL.(1998).Importance of observer experience in finding desert tortoises.JOURNAL OF WILDLIFE MANAGEMENT,62(2),590-596.
MLA Freilich, JE,et al."Importance of observer experience in finding desert tortoises".JOURNAL OF WILDLIFE MANAGEMENT 62.2(1998):590-596.
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