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Extended parental care of fledglings: parent birds adjust anti-predator response according to predator type and distance

Extended parental care of fledglings: parent birds adjust anti-predator response according to... Extended parental care of fledglings: parent birds adjust anti-predator response according to predator type and distance Diane Colombelli-Négrel 1) , Jeremy Robertson 1,3) , Frank J. Sulloway 2) & Sonia Kleindorfer 1) ( 1 School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia; 2 Institute of Personality and Social Research, University of California, 4125 Tolman Hall, Berkeley, CA 94720, USA) (Accepted: 22 February 2010) Summary Parent birds are expected to show anti-predator responses when predators are in the vicin- ity of their fledglings and to modify their response in relation to perceived risk posed by the predator. We used the superb fairy-wren ( Malurus cyaneus ) to experimentally test predictions of the risk-based alarm call hypothesis, whereby alarm vocalisation response is a proxy for predator risk (type, distance). Our results showed that birds modified their response to three factors: predator type (snake, fox, stationary and gliding sparrowhawks), predator distance (close, distant) and fledgling presence. We found evidence of post-fledging parental care in response to the fox, which was significantly higher when fledglings were present irrespective of predator distance. However, fledgling presence was not related to alarm vocalisations to the snake or the sparrowhawks (only distance http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Extended parental care of fledglings: parent birds adjust anti-predator response according to predator type and distance

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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/000579510x495771
Publisher site
See Article on Publisher Site

Abstract

Extended parental care of fledglings: parent birds adjust anti-predator response according to predator type and distance Diane Colombelli-Négrel 1) , Jeremy Robertson 1,3) , Frank J. Sulloway 2) & Sonia Kleindorfer 1) ( 1 School of Biological Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia; 2 Institute of Personality and Social Research, University of California, 4125 Tolman Hall, Berkeley, CA 94720, USA) (Accepted: 22 February 2010) Summary Parent birds are expected to show anti-predator responses when predators are in the vicin- ity of their fledglings and to modify their response in relation to perceived risk posed by the predator. We used the superb fairy-wren ( Malurus cyaneus ) to experimentally test predictions of the risk-based alarm call hypothesis, whereby alarm vocalisation response is a proxy for predator risk (type, distance). Our results showed that birds modified their response to three factors: predator type (snake, fox, stationary and gliding sparrowhawks), predator distance (close, distant) and fledgling presence. We found evidence of post-fledging parental care in response to the fox, which was significantly higher when fledglings were present irrespective of predator distance. However, fledgling presence was not related to alarm vocalisations to the snake or the sparrowhawks (only distance

Journal

Behaviour – Brill

Published: Jan 1, 2010

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