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