Active space of chemical alarm cue in natural fish populations

Active space of chemical alarm cue in natural fish populations Active space of chemical alarm cue in natural fish populations Brian D. Wisenden 1) (Biosciences Department, Minnesota State University Moorhead, 1104 7 th Ave S, Moorhead, MN 56563, USA) (Accepted: 23 November 2007) Summary Chemical cues released from injured fish skin during a predator attack provide reliable infor- mation about the presence of predation risk. Here, I report estimates of the area avoided by littoral fishes after experimental release of chemical alarm cues in two small lakes in northern Minnesota. Minnow traps were labeled chemically with either water (control) or skin extract (chemical alarm cue) made from 2 cm 2 of cyprinid skin (redbelly dace in experiment 1, fat- head minnows in experiment 2). Traps labeled with water were placed 1, 2, or 8 m from traps labeled with alarm cue. After 2 h, water-traps that were either 1 or 2 m distant from an alarm-trap caught significantly fewer fish than water-traps 8 m distant from alarm-traps. Con- specific and heterospecific skin extract produced similar area avoidance by fathead minnows. Redbelly dace showed a larger active space in response to conspecific than heterospecific alarm cues. Brook stickleback showed reduced catches within 2 m of skin extract of fathead http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Active space of chemical alarm cue in natural fish populations

Behaviour , Volume 145 (3): 391 – Jan 1, 2008

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Publisher
Brill
Copyright
© 2008 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
D.O.I.
10.1163/156853908783402920
Publisher site
See Article on Publisher Site

Abstract

Active space of chemical alarm cue in natural fish populations Brian D. Wisenden 1) (Biosciences Department, Minnesota State University Moorhead, 1104 7 th Ave S, Moorhead, MN 56563, USA) (Accepted: 23 November 2007) Summary Chemical cues released from injured fish skin during a predator attack provide reliable infor- mation about the presence of predation risk. Here, I report estimates of the area avoided by littoral fishes after experimental release of chemical alarm cues in two small lakes in northern Minnesota. Minnow traps were labeled chemically with either water (control) or skin extract (chemical alarm cue) made from 2 cm 2 of cyprinid skin (redbelly dace in experiment 1, fat- head minnows in experiment 2). Traps labeled with water were placed 1, 2, or 8 m from traps labeled with alarm cue. After 2 h, water-traps that were either 1 or 2 m distant from an alarm-trap caught significantly fewer fish than water-traps 8 m distant from alarm-traps. Con- specific and heterospecific skin extract produced similar area avoidance by fathead minnows. Redbelly dace showed a larger active space in response to conspecific than heterospecific alarm cues. Brook stickleback showed reduced catches within 2 m of skin extract of fathead

Journal

BehaviourBrill

Published: Jan 1, 2008

Keywords: CHEMICAL ALARM CUES; PREDATOR-PREY INTERACTIONS; ACTIVE SPACE; OSTARIOPHYSI; SCHRECKSTOFF

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