Precision In Pronghorn Composition Surveys In Wyoming
Authors(s): T. P. Woolley
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Publication Date: 0000-00-00
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Abstract: I compared fixed-wing aerial pronghorn (Antilocapra americana) composition survey estimates to ground survey estimates at 4 locations in Wyoming during 1993, and at 3 locations during 1994. I also compared individual observer's composition estimates both years. Aerial surveys produced significantly lower adult buck ratio estimates than ground surveys at 1 site during 1993 (P=0.03), and 2 sites during 1994 (p=0.03, p<0.01). Fixed-wing aerial surveys also produced lower fawn ratios than ground surveys at 1 site during 1994 (P=0.03, P=0.04). Observers' ratio estimates were similar for both air and ground during 1993 P< 0.01) and ground (P=0.05, P<0.02) surveys at 2 sites, and yearling buck ratios differed between observers during air (P=0.02) and ground (P<0.01) surveys at 1 site, during 1994. Neither fixed-wing or ground survey ratios were consistently more precise and observer precision was similar among individuals. Fixed-wing aerial surveys required significantly less time but cost more than ground surveys at all sites both years.
Keywords: Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, animal, mammal, ungulage, Wyoming, pronghorn, antelope, Antilocapra americana, population
| BIBLIOGRAPHY ID | 1160 |
| REF TYPE | Thesis |
| AUTHORS | T. P. Woolley |
| PUB DATE | 0000-00-00 |
| DATE STR | 0000-00-00 |
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| DOC TITLE | Precision In Pronghorn Composition Surveys In Wyoming |
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| UNIVERSITY | Wyoming Cooperative Fish and Wildlife Research Unit |
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| KEYWORDS | Wyoming Cooperative Fish and Wildlife Research Unit, University of Wyoming, animal, mammal, ungulage, Wyoming, pronghorn, antelope, Antilocapra americana, population |
| ABSTRACT | I compared fixed-wing aerial pronghorn (Antilocapra americana) composition survey estimates to ground survey estimates at 4 locations in Wyoming during 1993, and at 3 locations during 1994. I also compared individual observer's composition estimates both years. Aerial surveys produced significantly lower adult buck ratio estimates than ground surveys at 1 site during 1993 (P=0.03), and 2 sites during 1994 (p=0.03, p<0.01). Fixed-wing aerial surveys also produced lower fawn ratios than ground surveys at 1 site during 1994 (P=0.03, P=0.04). Observers' ratio estimates were similar for both air and ground during 1993 P< 0.01) and ground (P=0.05, P<0.02) surveys at 2 sites, and yearling buck ratios differed between observers during air (P=0.02) and ground (P<0.01) surveys at 1 site, during 1994. Neither fixed-wing or ground survey ratios were consistently more precise and observer precision was similar among individuals. Fixed-wing aerial surveys required significantly less time but cost more than ground surveys at all sites both years. |
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| URLADDRESS | http://uwadmnweb.uwyo.edu/fish_wild/abstracts/woolley_t/index.html |
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Posted on
Sun, July 31, 2011
by Beringia South