Browsing Brage IMR by Author "Ulgenes, Yngve"
Now showing items 1-4 of 4
-
Aluminium accumulation on eggs and hatching system during the incubation period - an important cause of variable hatching success ?
Ulgenes, Yngve; Torrissen, Ole (ICES CM Documents;1984/F:27, Working paper, 1984)Groups of rainbow trout eggs were incubated in duplicate in trays with PVC screens and original aluminium screens. During incubation aluminium bound to sediments was deposited on eggs and hatching systems. By adding ... -
Effects of different rearing environments on the mortality of Atlantic salmon broodstock and eggs
Ulgenes, Yngve; Torrissen, Ole; Hansen, Tom (ICES CM Documents;1984/F:26, Working paper, 1984)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 ... -
pH adjustment of acid water at Matre Aquaculture Station: Experiences with previous and existing methods
Ulgenes, Yngve; Hansen, Tom; Torrissen, Ole (ICES CM Documents;1984/F:28, Working paper, 1984)The water from Matre River is characterized as very soft, with a total hardness of 1. 5 - 2. 5 mg Ca0/1 and a very low buffer capacity. Acid precipitation results in low pH, values below 5. 0 are recorded every year. ... -
The influence of a stimulated transportation of newly fertilized Atlantic salmon eggs on mortality to the eyed stage
Ulgenes, Yngve (ICES CM Documents;1985/F:29, Working paper, 1985)Transport of newly fertilized eggs has often resulted in severe mortality of the eggs during incubation to the eyed stage. To investigate the effect of transport on mortality, pooled eggs from several females were handled ...