Effects of different rearing environments on the mortality of Atlantic salmon broodstock and eggs

Atlantic salmon (Salmo salar) reared for three years in seawater were moved to brackish- and freshwater before they matured. A control group matured in seawater. The groups were given different feeding regimes the last months before maturation. Mortality of maturing and stripped broodfish was lower...

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Bibliographic Details
Main Authors: Ulgenes, Yngve, Torrissen, Ole, Hansen, Tom
Format: Report
Language:English
Published: ICES 1984
Subjects:
mortality
dødelighet
atlantic salmon
atlantisk laks
egg quality
eggkvalitet
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Resource biology: 921
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923
Atlantic salmon
Salmo salar
Online Access:http://hdl.handle.net/11250/104013
Description
Summary:Atlantic salmon (Salmo salar) reared for three years in seawater were moved to brackish- and freshwater before they matured. A control group matured in seawater. The groups were given different feeding regimes the last months before maturation. Mortality of maturing and stripped broodfish was lower in both the brackish and freshwater than that in seawater. Eggs stripped from fresh- or brackish water showed significant lower mortalities to the eyed stage than eggs stripped from seawater. There was no significant differences in mortality to the eyed stage between groups of eggs stripped from brackish and fresh water. Starvation of Atlantic salmon broodstock four months prior to spawning did not seem to adversely affect egg quality.

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