Home range of juvenile atlantic salmon salmo salar and brown trout salmo trutta in a norwegian stream
Freshwater Biology 24(1): 63-68
ISSN/ISBN: 0046-5070 DOI: 10.1111/j.1365-2427.1990.tb00307.x
1. The sizes of home ranges of juvenile Atlantic salmon (age 1+) and brown trout (age 2+ to 9+) in a Norwegian coastal stream were estimated by local movements of batch-marked fish from 12.5 and 25 m long sections. Only recoveries made in the release section and in up- and downstream neighbouring sections were considered. 2. There was no significant difference in the average percentage of recaptures of salmon and trout between 12.5 and 25 m sections; a stream area of about 40-50 m2 defines the size of home range for stocks of both species. 3. The fraction of brown trout recaptured in release sections increased with increasing fish densities, indicating a smaller home range under these conditions.