Document Detail

The early life history stages of riverine fish: ecophysiological and environmental bottlenecks.
MedLine Citation:
PMID:  12443905     Owner:  NLM     Status:  MEDLINE    
Fish are good indicators of the environmental health of rivers and their catchments as well as important conservation targets. Bioindication has to be based on an understanding of the requirement of characteristic species with regard to: (a). The match/mismatch between reproductive strategies and environmental conditions. (b). The niche dimensions of critical stages vis-a-vis the key conditions. (c). The availability of microhabitats along the ontogenetic niche profiles, i.e. the connectivity from spawning substrates to early life history microhabitats. The main conditions for the embryonic period are temperature and oxygen supply which are responsible for embryonic mortality, the duration of the period, and size and condition of newly-hatched larvae. For the exogenously feeding larvae the functional of food acquisition, growth and bioenergetics to temperature, food availability and current velocity is decisive. Studies concentrated on Chondrostoma nasus, a target species for monitoring and conservation in large European river systems. Results obtained in experimental studies are compared with those from field studies in order to evaluate the match/mismatch between performances and microhabitat choice and population dynamics in the field. Discrepancies between requirements and field conditions in regulated rivers underline the significance of inshore zones as microhabitats (expressed in the 'Inshore Retention Concept') and the requirement for ecophysiological studies on target species for river restoration and conservation.
Fritz Schiemer; Hubert Keckeis; Ewa Kamler
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  133     ISSN:  1095-6433     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2002 Nov 
Date Detail:
Created Date:  2002-11-21     Completed Date:  2003-06-25     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  439-49     Citation Subset:  IM    
Department of Limnology, University Vienna, A-1090, Vienna, Austria.
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MeSH Terms
Fishes / growth & development*,  physiology
Fresh Water

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

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