The use of two nature‐like fishways by some fish species in the Swedish River Emån
Identifieur interne : 000749 ( Main/Exploration ); précédent : 000748; suivant : 000750The use of two nature‐like fishways by some fish species in the Swedish River Emån
Auteurs : E. O. Calles [Suède] ; L. A. Greenberg [Suède]Source :
- Ecology of Freshwater Fish [ 0906-6691 ] ; 2007-06.
English descriptors
Abstract
Abstract – We studied the use of two nature‐like fishways by 15 fish species (N = 240) in the River Emån in southern Sweden. Use of the fishways for both passage and as a habitat was studied by electrofishing, trap catches and PIT telemetry. Of the 187 PIT‐tagged fish, 52 individuals from 10 different species ascended one of the fishways for a total passage efficiency of 74%. For the five species that most frequently ascended the fishways, the passage efficiency was 100% for tench (Tinca tinca L.) and perch (Perca fluviatilis L.), 86% for chub (Leuciscus cephalus L.), 60% for burbot (Lota lota L.) and 50% for roach (Rutilus rutilus L.). Individuals that failed to pass the fishways were typically small cyprinids or species that were assumed to have taken up residence in the fishways, such as juvenile brown trout (Salmo trutta L.) and burbot. The nature‐like fishways have re‐established longitudinal connectivity for most of the studied species and also functioned as rearing and winter habitat for a number of species.
Url:
DOI: 10.1111/j.1600-0633.2006.00210.x
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