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Environmental implications of nutrition and metabolism of salmonids

Published online by Cambridge University Press:  24 November 2017

C.G. Carter ,
D.F. Houlihan ,
I.D. McCarthy ,
A.I. Mitchell  and
B. Buchanan
C.G. Carter
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB9 2TN, U.K.
D.F. Houlihan
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB9 2TN, U.K.
I.D. McCarthy
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB9 2TN, U.K.
A.I. Mitchell
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB9 2TN, U.K.
B. Buchanan
Affiliation:
Department of Zoology, University of Aberdeen, Tillydrone Avenue, Aberdeen AB9 2TN, U.K.
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Extract

In farmed salmonids the majority of consumed nitrogen is lost in metabolic waste products (mainly ammonia) and the faeces (Table 1). Any improvement in nitrogen retention, brought about by reductions in these components, would decrease environmental load. Inter-individual variation in retained nitrogen has been little investigated as a basis for selection of more efficient fish; this communication points to an experimental approach to measuring individual variation by concentrating on digestive efficiency and protein turnover as possible contributors to nitrogen retention. The utilization of dietary nitrogen was investigated in two species of farmed salmonid, the rainbow trout, Oncorhynchus mykiss and the Atlantic salmon, Salmo salar.

Type
Fish
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 77
Copyright
Copyright © The British Society of Animal Production 1992

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References

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