PREY SWITCHING AND VARIABLE FORAGING STRATEGIES OF BLACK-LEGGED KITTIWAKES AND THE EFFECT ON REPRODUCTIVE SUCCESS
作者： Robert M. Suryan , David B. Irons , Jeb Benson
DOI: 10.1650/0010-5422(2000)102[0374:PSAVFS]2.0.CO;2
关键词: Kittiwake 、 Ecology 、 Sand lance 、 Fishery 、 Pacific herring 、 Biology 、 Capelin 、 Foraging 、 Herring 、 Clupeidae 、 Prey switching
摘要: Abstract We studied the diets, foraging strategies, and reproduction of Black-legged Kittiwakes (Rissa tridactyla) during five years at two colonies within Prince William Sound, Alaska. Years with reduced occurrence 1-year-old Pacific herring (Clupea pallasi) in kittiwake diets were associated increased trip duration, distance, travel time both colonies. Foraging range was consistently greater large, fjord colony an annual mean duration 4 hr distance to farthest feeding location 40 km when dominated diets; these numbers a maximum 6 60 year kittiwakes consumed primarily young-of-year (YOY) sand lance (Ammodytes hexapterus). trips small, island averaged 2 5 capelin (Mallotus villosus) YOY consumed. Consequenc...
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