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Unpredictability of fish recruitment: interannual variation in young–of–the–year abundance
Author(s) -
Karjalainen J.,
Auvinen H.,
Helminen H.,
Arjomäki T. J.,
Niva T.,
Sarvala J.,
Vilhanen M.
Publication year - 2000
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2000.tb00876.x
Subject(s) - biology , abundance (ecology) , larva , ichthyoplankton , catch per unit effort , fishery , sampling (signal processing) , ecology , filter (signal processing) , computer science , computer vision
In 1989–1998, vendace larvae Coregonus albula were sampled in Finnish lakes following a stratified random sampling design. The abundance of young–of–the–year vendace after the first growing season was estimated using catch–per–unit–effort statistics. The number or total area of nursery places hardly limited the recruitment of vendace in the study lakes. The major proportion of prerecruit mortality of vendace occurred in the larval phase and larval sampling produced significant information on young–of–the–year survival. Although larval abundances and recruitment were clearly associated only in Lake Onkamo, generally high larval abundance was needed to produce high number of recruits.