Skip to main content
SLU publication database (SLUpub)

Research article2002Peer reviewed

Life-history variation in perch (Perca. fluviatilis L.) in five neighbouring Norwegian lakes

Heibo E, Vollestad LA


Perca fluviatilis L.) from five neighbouring lakes in Norway. The lakes vary in water quality, varying from strongly acidified (pHless than or equal to5.0) to not acidified (pHgreater than or equal to6.0). Estimated annual survival rates did not differ among populations. There was no strong relationship between age at maturity in female perch and acidification. However, age at maturity was lower for female perch from the most acidic lake (c. 2 years) compared with perch in the four other lakes (2.5-3.5 years). There was no relationship between acidification level and size-adjusted egg size, fecundity or reproductive investment (Gonadosomatic index - GSI). Perch in the most acidified lake showed large variation in egg size, the lowest length-specific fecundity, the highest GSI, and the lowest age at maturity. Environmental stress, such as acidification, induces a number of changes to a lake community. It is therefore difficult to predict how acidification will influence the population dynamics and reproductive biology of a perch population

Published in

Ecology of Freshwater Fish
2002, Volume: 11, number: 4, pages: 270-280 Publisher: BLACKWELL MUNKSGAARD

      SLU Authors

    • Heibo, Erik

      • Department of Aquaculture, Swedish University of Agricultural Sciences

    UKÄ Subject classification

    Fish and Aquacultural Science

    Publication identifier


    Permanent link to this page (URI)