Appelberg, Magnus
- Swedish Board of Fisheries
Abstract
Test fishing with multimesh gillnets was performed in 103 acidified Swedish lakes before and 2-4 years after liming. In a subset of 39 lakes additional test fishing was carried out 5-9 years after liming. Taking into account the sampling biases due to differences between water temperature and number of nets used on different sampling occasions, an increase of the total CPUE, the number of species caught and recruitment of dominating species was evident after liming. Decreased recruitment was found for perch (Perca fluviatilis) at a pH below 5.2 and for roach (Rutilus rutilus) at a pH below 6.1. During the acidification phase and 2-4 years after liming acid-tolerant perch dominated the lakes, but when a longer time had elapsed after liming species dominance shifted and acid-sensitive planktivorous species increased in CPUE while perch decreased.
Keywords
ACIDIFICATION; MITIGATION; LAKE LIMING; CPUE; TEST FISHING
Published in
Hydrobiologia
1992, volume: 230, number: 3, pages: 201-212
Publisher: KLUWER ACADEMIC PUBL
SLU Authors
UKÄ Subject classification
Ecology
Publication identifier
- DOI: https://doi.org/10.1007/BF00036566
Permanent link to this page (URI)
https://res.slu.se/id/publ/87572