Aggression and growth of Atlantic salmon parr. I. Different stocking densities and size groups
Research report
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http://hdl.handle.net/11250/114520Utgivelsesdato
1986Metadata
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The aggressive behaviour and growth of salmon parr under crowded rearing conditions was
studied at four different densities. One or several fish per aquarium was dominant, displaying a
kind of territorial defence and committing a significant part of the observed aggressive acts. Large
subordinate fish were more aggressive than small fish at all densities. The ratio between the
number of performed and received aggressive actions was about the same for large and small
subordinate fish at the lowest density, but with increasing density this ratio became higher for large
parr. Small fish grew slower than large fish at the highest density and suffered generally from a
higher mortality. Factors other than aggression also seemed to influence growth, as both the
growth rate and number of aggressive acts per fish decreased with increasing density.
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Fiskeridirektoratets skrifter, Serie Havundersøkelservol 18 no 3