Document Detail

Effects of repeated crowding on the stress response and growth performance in Atlantic salmon (Salmo salar).
MedLine Citation:
PMID:  19288255     Owner:  NLM     Status:  MEDLINE    
A 64-day growth experiment was conducted in which two groups of Atlantic salmon parr were grown under either control conditions or subjected to a weekly crowding stressor. Subjecting fish to the stressor resulted in a 7.7% reduction in wet weight after 29 days, which was maintained at 7.9% by day 64. This reduction in weight was reflected in a 44% reduction in specific growth rate and 38% increase in feed conversion ratio over the first 29 days of the experiment. Elevation in plasma cortisol was observed in crowded fish on days 1, 29 and 64. Similarly, on days 1 and 29 an increase in both plasma glucose and lactate was detected. On day 64, however, no differences in plasma glucose and lactate were observed, with the magnitude of the cortisol response also significantly reduced. Overall, the relatively moderate impact on growth performance and reduction in magnitude of measured stress parameters at the end of the experiment suggests possible habituation to the applied stressor.
T V Basrur; R Longland; R J Wilkinson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-03-15
Journal Detail:
Title:  Fish physiology and biochemistry     Volume:  36     ISSN:  1573-5168     ISO Abbreviation:  Fish Physiol. Biochem.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-19     Completed Date:  2010-12-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100955049     Medline TA:  Fish Physiol Biochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  445-50     Citation Subset:  IM    
School of Aquaculture, Tasmanian Aquaculture and Fisheries Institute, University of Tasmania, Launceston, Australia.
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MeSH Terms
Analysis of Variance
Blood Glucose / metabolism
Body Weight
Hydrocortisone / blood
Lactic Acid / blood
Salmo salar / growth & development*
Stress, Physiological / physiology*
Reg. No./Substance:
0/Blood Glucose; 50-21-5/Lactic Acid; 50-23-7/Hydrocortisone

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

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