Relative precision and sources of bias in pronghorn sex and age composition surveys
Article Abstract:
Age and sex composition surveys are valuable wildlife management tools but their precision is ill understood. Research shows that ground composition surveys are often inaccurate and highly variable. A comparison of ground and aerial composition surveys of pronghorns in Wyoming is presented. A study of six comparisons shows that three ground surveys yielded higher adult buck ratios than aerial surveys. Observations in three out of 12 ground surveys show differences, while five out of 12 aerial surveys differed. Neither method was seen to be more precise.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1997
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Development and evaluation of sightability models for summer elk surveys
Article Abstract:
Elk herd segments in the Grand Teton National Park congregate in winter ranges where they often mix, making it important that management agencies know the composition and size of individual herds so that an equitable hunting strategy can be formulated. A new study seeks to develop predictive sightability models for the estimation of elk population and age-sex ratios using summer aerial surveys of radiocollared elk. The new models are compared with the winter elk sightability Idaho model.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 1998
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Population characteristics of sympatric mule and white-tailed deer on Rock Mountain Arsenal, Colorado
Article Abstract:
A comparison of mule deer and white-tailed deer populations near Denver, Colorado, show mule deer outnumber white-tailed deer by a ratio of four to one, and mule deer fawns survive white-tailed deer fawns by a ratio of two to one. These baseline figures account for the three-to-one difference in perceived population growth rates between the mule deer and the white-tailed deer, respectively.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2001
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