Document Detail

Does snatching frequency really indicate food ingestion in the Nile tilapia?
MedLine Citation:
PMID:  1800999     Owner:  NLM     Status:  MEDLINE    
The fitness of the snatching frequency as an indicator of food intake in Nile tilapia fingerlings, Oreochromis niloticus (L), was studied. Five groups of four individuals each were used after a two-day starvation period. The hierarchical rank among individuals in the same group was registered. Food in the form of tiny pellets (ranging from 1.30 to 1.95 mm in diameter) was offered, and the individual snatching frequency was observed during a 20-min period. The animals were then sacrificed for evaluation of stomach contents. It was concluded that snatching frequency is not a good parameter to indicate individual food intake in this species when fed as a group with pellets crushed into tiny particles. This raises a problem for investigations that require evaluation of the cumulative effect of competition on food intake, such as growth or conversion efficiency studies. Furthermore, a very low correlation between snatching frequency and food intake was shown in the third hierarchical rank. It is suggested that the linearity assumed in such hierarchies should be reconsidered.
M P Carrieri; G L Volpato
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiology & behavior     Volume:  50     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  1991 Sep 
Date Detail:
Created Date:  1992-04-21     Completed Date:  1992-04-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  489-92     Citation Subset:  IM    
Group of Studies on Heterogeneous Growth, Department of Physiology, IB, UNESP, Botucatu, SP, Brazil.
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MeSH Terms
Competitive Behavior / physiology
Eating / physiology*
Feeding Behavior / physiology*
Perches / physiology*
Social Behavior

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

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