Browsing Brage IMR by Author "Jakobsen, Per J."
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Effects of pre-release acclimatization period on salmon return rates
Skilbrei, Ove; Holm, Marianne; Jakobsen, Per J. (ICES CM Documents;1995/M:13, Working paper, 1995)42.000 1+smolts of Atlantic salmon were size graded into two size groups and released during three weeks in spring 1993; one group of small and one of large smolts on each of the four release days. Approximately 25% of ... -
Increased growth rate in Atlantic salmon parr by using a two-colour diet
Holm, Jens Christian; Jakobsen, Per J.; Johnsen, Geir Helge (ICES CM Documents;1985/F:17, Working paper, 1985)Fishes hunting by sight are known to pay a cost of confusion when faced with high densities of uniform food particles. In such instances, awareness of other stimuli reduces feeding efficiency such that the fishes prefer ...