Growth and Movement in Brown Trout (Salmo trutta) in two Norwegian Rivers

摘要: In the present study, using stream-dwelling brown trout (Salmo trutta) as a model species, movement through summer and autumn in two large Norwegian rivers, River Glomma Gudbrandsdalslagen, was observed. addition fish from each river were sampled for age growth analysis. The aim of study to test which individual characteristics (sex, body mass, condition factor, tagging site cohort) that influenced correlations between rates (both immature mature) (movement during season spawning migration) on spatiotemporal scale. Model selection showed negatively related there difference activity rivers. Female size had positive effect level shown period; however no such relationship found males. As this has not been before salmonids, reason pattern remains unknown. However, one might speculate it is differences sexes size-specific energy requirements associated with spawning. Neither nor migration could be predicted experienced juveniles. This indicates variation among individuals temporally consistent throughout life trout.