Document Detail

Expression of a reflex biting/snapping response to amino acids prior to first exogenous feeding in salmonid alevins.
MedLine Citation:
PMID:  10549895     Owner:  NLM     Status:  MEDLINE    
Five days prior to first exogenous feeding, amino acid stimuli released reflexive biting/snapping behavior in alevins of both rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis). The biting/snapping responses of salmonid larvae, which obtain nutrients solely from their yolk sacs, were videotaped during presentations of amino acids that are potent olfactory and taste stimuli to adult rainbow trout. The tested salmonid alevins possessed developed eyes and olfactory and taste organs several days prior to the start of spontaneous swimming and exogenous feeding. Five days prior to the first occurrence of complex feeding behavior, L-proline and L-alanine, which released swimming, turning, and biting/snapping (exaggerated biting) behaviors in adult rainbow trout, triggered reflexive biting/snapping behavior in the alevins of rainbow and brook trout, but did not induce swimming. In contrast, L-proline released vigorous swimming, but not biting/snapping activity in alevins of the European freshwater huchen (Hucho huncho), another salmonid species. Unlike in adult rainbow trout where visual and olfactory stimuli control all the successive behavior patterns of feeding behavior, taste stimuli released in alevins of rainbow and brook trout the early biting/snapping reflex independently from the complex feeding behavior. The independent biting/snapping reflex of rainbow and brook trout alevins ceased at the onset of spontaneous swimming activity several hours prior to the first exogenous feeding.
T Valentincic; C F Lamb; J Caprio
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Physiology & behavior     Volume:  67     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  1999 Oct 
Date Detail:
Created Date:  1999-12-13     Completed Date:  1999-12-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  567-72     Citation Subset:  IM    
Department of Biology, University of Ljubljana, Slovenia.
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MeSH Terms
Alanine / pharmacology
Amino Acids / pharmacology*
Deglutition / drug effects
Oncorhynchus mykiss / physiology*
Pharynx / anatomy & histology,  innervation,  physiology
Photic Stimulation
Predatory Behavior / drug effects*
Proline / pharmacology
Reflex / drug effects*
Smell / physiology
Swimming / physiology
Taste / drug effects,  physiology
Trout / physiology*
Reg. No./Substance:
0/Amino Acids; 147-85-3/Proline; 56-41-7/Alanine

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

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