Experimental study of the nitrogen excretion of bass (Dicentrarchus labrax) during growth - II. Effects of starvation on the excretion of ammonia and urea

The effects of starvation and temp on ammonia and urea excretion in the bass (D. labrax; groups 0, 1 and 2) were examined for fish acclimated to 16, 18 and 20{degree}C. Ammonia and urea excretion decreased during the 7- day period of starvation to a constant; the Endogenous Nitrogen Excretion (ENE)....

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Bibliographic Details
Published inAquaculture Vol. 9; no. 2; pp. 187 - 194
Main Author Guerin-Ancey, O
Format Journal Article
LanguageFrench
Published 01.01.1976
Subjects
Dicentrarchus labrax
Marine
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Summary:The effects of starvation and temp on ammonia and urea excretion in the bass (D. labrax; groups 0, 1 and 2) were examined for fish acclimated to 16, 18 and 20{degree}C. Ammonia and urea excretion decreased during the 7- day period of starvation to a constant; the Endogenous Nitrogen Excretion (ENE). ENE is 72 mg N per kg per 24 h of ammonia and 12 mg N per kg per 24 h of urea. ENE is the same for age groups 0, 1 and 2 and occurs later at 16{degree}C than at 20{degree}C. The percentage of urea excreted increased during the starvation period. N reserves were calculated to be greater in younger fish and in autumn.
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ISSN:0044-8486