Document Detail

Learning and anticipatory behaviour in a "sit-and-wait" predator: the Atlantic halibut.
MedLine Citation:
PMID:  20015468     Owner:  NLM     Status:  MEDLINE    
We studied the learning capacities and anticipatory behaviour in a "sit-and-wait" predatory fish, the Atlantic halibut, Hippoglossus hippoglossus. In Experiment 1 two groups of halibut received series of light flashes (conditioned stimulus, CS) that started before delivery of food (unconditioned stimulus, US) and persisted until after food delivery, i.e. delay conditioning. Control groups received unpaired CS and US presentations. The anticipatory behaviour of delay conditioned halibut consisted mainly of take-offs towards the surface shortly after onset of the CS. In Experiment 2 six groups of halibut were trained in three trace conditioning procedures: Two groups with 20s, two groups with 60s and two groups with 120s trace interval. Learning was evident in the 20 and 60s trace groups and in one of the 120s trace groups. In contrast to delay conditioning the anticipatory behaviour of trace conditioned halibut was characterized by subtle movements near the tank floor with orientation towards the CS. The cautious responses of halibut after trace conditioning differed markedly from what is observed in other fish species and are suggested to reflect a "sit-and-wait" foraging strategy that requires the predator to remain undetected until the prey is within lunging range.
Jonatan Nilsson; Tore S Kristiansen; Jan Erik Fosseidengen; Lars Helge Stien; Anders Fern?; Ruud van den Bos
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-14
Journal Detail:
Title:  Behavioural processes     Volume:  83     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-03-08     Completed Date:  2010-06-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  257-66     Citation Subset:  IM    
Copyright Information:
Copyright (c) 2009 Elsevier B.V. All rights reserved.
Institute of Marine Research, Nordnes, Bergen, Norway.
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MeSH Terms
Conditioning, Classical*
Motor Activity*
Photic Stimulation
Predatory Behavior
Psychomotor Performance
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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