The population dynamics of brown trout (salmo trutta L.) in relation to year-class size

Gorm Rasmussen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Studies on the production of brown trout and yeald of smolt were carried out in a small Dansih sea-trout stream since 1978. Two sites were studied and the production ranged from 16.9 to 26.4 wet wt. or 20.6to 32.1 kcal m-2 yr-1. In April and May the smolts lave the brook when they are 2 years old and the yield varied from 14.6 to 19.8 smolt 100 m-2. the whole brook was electro-fished each year in November and using a growth model and estimated rates of mortality, the production in the total brook was found ranging from 12.0 to 16.6 g. wet wt. or 15.2 to 20.0 kcal m-2 yr-1; this indicates a food consumption from 96.2 to 114.2 kcal m-2 yr-1
Original languageEnglish
JournalPolskie Archiwum Hydrobiologii
Volume33
Issue number3/4
Pages (from-to)489-508
Number of pages20
ISSN0032-3764
Publication statusPublished - 1986

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