1991, English, Article edition: Utilization of different prey type patches in the Ural owl(Strix uralensis): a sit-and-wait predator Nishimura, Kinya

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Physical Description
  • text/​html
Published
  • Oxford University Press
  • 1991-01-01 00:00:00.0
Language
  • English

Edition details

Title
  • Utilization of different prey type patches in the Ural owl(Strix uralensis): a sit-and-wait predator
Author
  • Nishimura, Kinya
Published
  • Oxford University Press
  • 1991-01-01 00:00:00.0
Physical Description
  • text/​html
Subjects
Notes
  • To quantify the pattern of allocation of foraging activity of a sit-and-wait forager among feeding sites of different profitability, I conducted an experimental study of patch utilization behavior of Ural owls ( Strix uralensis ) in an experimental flight cage. The owls were allowed to search among four patches containing equal numbers of mice, two with the large Japanese field mouse ( Apodemus speciosus ) and two with the small Japanese field mouse ( A. argenteus ). Patches with A. speciosus were more profitable than those with A. argenteus , and owls visited more profitable patches more frequently. Visiting frequency to richer patches did not increase with experience; however, owls changed search time according to experience. Search time in a patch became longer in later visits than in earlier visits during a given night according to an owl’s sampling experience among patches. Furthermore, owls stayed longer in richer patches than in poor ones if they had caught mice in both types of patches. Search time had great variance. Mean search time that ended with attack was longer than that ended without attack (give up). In effect, Ural owls improved their resource utilization pattern as they accumulated experience in the environment. [ Behav Ecol 1991;2:99–105J ]
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  • Copyright (C) 1991, International Society for Behavioral Ecology
Language
  • English
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