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Aerial estimation of the size of gull breeding colonies

Journal of Wildlife Management

By:
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Abstract

Counts on photographs and visual estimates of the numbers of territorial gulls are usually reliable indicators of the number of gull nests, but single visual estimates are not adequate to measure the number of nests in individual colonies. To properly interpret gull counts requires that several islands with known numbers of nests be photographed to establish the ratio of gulls to nests applicable for a given local census. Visual estimates are adequate to determine total breeding gull numbers by regions. Neither visual estimates nor photography will reliably detect annual changes of less than about 2.5 percent.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Aerial estimation of the size of gull breeding colonies
Series title:
Journal of Wildlife Management
Volume
32
Issue:
2
Year Published:
1968
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
287-293
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
287
Last page:
293
Number of Pages:
7