Document Detail

Influence of nutritional status on the daily patterns of nitrogen excretion in the carp (Cyprinus carpio L.) and the rainbow trout (Salmo gairdneri R.).
MedLine Citation:
PMID:  7349509     Owner:  NLM     Status:  MEDLINE    
Nitrogen (ammonia and/or urea) excretion in carp and rainbow trout kept under different feeding regimes was continuously monitored over 24-hr cycles. The daily nitrogen excretion patterns resulting from these feeding regimes were studied over several days after a change from one made to another. Constant levels of endogenous nitrogen excretion were reached about one week after the start of a fasting period; almost one week was needed for the daily nitrogen excretion pattern to stabilize after the feeding rhythm was changed. Overall daily nitrogen excretion rates were directly related to nitrogen consumption in carp as well as in trout. The rate of ammonia excretion increased immediately after each meal; the maximum rate occurred at different intervals, depending on the amount of nitrogen intake as well as on the time-lapse after a particular feeding regime was initiated. Contrary to data on sockeye salmon, post-digestive nitrogen excretion rate was distinctly different from the ENE rates observed during fasting in carp and rainbow trout.
S J Kaushik
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Reproduction, nutrition, development     Volume:  20     ISSN:  0181-1916     ISO Abbreviation:  Reprod Nutr Dev     Publication Date:  1980  
Date Detail:
Created Date:  1983-03-11     Completed Date:  1983-03-11     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005903     Medline TA:  Reprod Nutr Dev     Country:  FRANCE    
Other Details:
Languages:  eng     Pagination:  1751-65     Citation Subset:  IM    
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MeSH Terms
Ammonia / urine
Carps / urine*
Circadian Rhythm
Cyprinidae / urine*
Nitrogen / urine*
Salmonidae / urine*
Trout / urine*
Urea / urine
Reg. No./Substance:
57-13-6/Urea; 7664-41-7/Ammonia; 7727-37-9/Nitrogen

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

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