DOMINANCE RELATIONSHIPS AND AGONISTIC BEHAVIOR OF CANADA GEESE IN WINTER by DENNIS G. RAVELING 1) 2) (Cooperative Wildlife Research Laboratory, Southern Illinois University, Carbondale, Illinois, U.S.A.) (With 9 Figures) (Rec. 15-VII-I970) INTRODUCTION The fact that many animals exist in close, intraspecific, competitive situations with regard to many essentials of life has stimulated a variety of studies and explanations of the functions and evolution of aggression and dominance orders. Studies of dominance in various species of geese have been reported by JENKINS ( 1944), COLLIAS HANSON (1953), BOYD (1953); L,ORENZ (1959, 1966) and FISCHER (1965) mentioned certain dominance aspects or implications regarding geese. Past studies were based on observation of captive or semi-captive birds, or on partially color- marked families or unmarked wild birds. This study is based on repeated observations of the same color-marked individuals and families of Canada geese (Branta canadensis) in the wild, free-living state during winter. Radio- telemetry techniques enabled locations, movements, and behavior of specific individuals to be recorded. This paper reports results of victories and losses in aggressive conflict situations and describes the postures associated with those results. An attempt is made to integrate an understanding of the function and evolution of agonistic
Behaviour – Brill
Published: Jan 1, 1970
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