Factors affecting the patterns of behavior of individual Glaucous-winged Gulls (Larus glaucescens) on Protection Island, Jefferson County, Washington were examined. Males were found to be present on territory often than females. Proportions of behavior varied by time of season. Gulls tended to be more alert (used upright and intermediate-upright displays) during the "chick" stage than earlier in the season. Attendance rates were very similar between individuals of the same gender, and a significant correlation was found between the attendance rates of members of a pair. However, sequences of territorial behavior varied significantly between genders.
Joseph G. Galusha
Leonard R. Brand
Master of Science (MS)
Year Degree Awarded
Date (Title Page)
Library of Congress/MESH Subject Headings
Glaucous-winged gulls -- Washington -- Behavior; Protection Island National Wildlife Refuge (Wash.)
Loma Linda University Libraries
This title appears here courtesy of the author, who has granted Loma Linda University a limited, non-exclusive right to make this publication available to the public. The author retains all other copyrights.
Murdoch, Michael, "Factors Affecting Behavioral Variation of Individual Glaucous-Winged Gulls (Larus Glaucescens) While on Territory" (1993). Loma Linda University Electronic Theses, Dissertations & Projects. 695.
Loma Linda University Electronic Theses and Dissertations
Loma Linda University. Del E. Webb Memorial Library. University Archives