Document Detail


Effect of wave exposure dynamics on gut content mass and growth of young-of-the-year fishes in the littoral zone of lakes.
MedLine Citation:
PMID:  20557626     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Total length, body mass and gut content mass of young-of-the-year (YOY) perch Perca fluviatilis, dace Leuciscus leuciscus and bleak Alburnus alburnus were recorded over the summer of 2006 at three littoral sites at Upper Lake Constance. In P. fluviatilis and L. leuciscus, gut content mass correlated positively with wave-induced energy flux (E(F)) of the respective site and sampling day, while no correlation of gut content mass with E(F) was found in A. alburnus. It was assumed that benthivorous P. fluviatilis and L. leuciscus profited from suspended or uncovered benthic food items generated by wave action at sites and periods with high E(F). Alburnus alburnus, in contrast, feeding mainly on zooplankton in upper parts of the water column, could not profit from increased E(F). In P. fluviatilis, increased gut content mass during periods of high E(F) resulted in higher growth rates. For L. leuciscus, no real growth rates in local fish populations could be determined, as individuals were less sedentary, and when increased growth occurred at sites during the periods of high E(F), migration of fish levelled out the resulting size differences within few days. The results of this study show that dynamic habitat variables affect site profitability in the littoral zone of lakes, especially in benthivorous fishes. Therefore, dynamic habitat variables should be considered in addition to fixed habitat properties in analyses of habitat choice of fishes in the littoral zone of lakes.
Authors:
S Stoll; H Hofmann; P Fischer
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of fish biology     Volume:  76     ISSN:  1095-8649     ISO Abbreviation:  J. Fish Biol.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-06-18     Completed Date:  2010-09-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0214055     Medline TA:  J Fish Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1714-28     Citation Subset:  IM    
Affiliation:
Limnological Institute, University of Konstanz, 78457 Konstanz, Germany. stefan.stoll@uni-konstanz.de
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MeSH Terms
Descriptor/Qualifier:
Animals
Body Size
Cyprinidae / growth & development*
Ecosystem*
Feeding Behavior
Fresh Water
Linear Models
Perches / growth & development*
Population Dynamics
Temperature
Water Movements*

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


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