Effects of liming on the occurrence and abundance of fish populations in acidified Swedish lakes

Sammanfattning

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.

Nyckelord

ACIDIFICATION; MITIGATION; LAKE LIMING; CPUE; TEST FISHING

Publicerad i

Hydrobiologia
1992, volym: 230, nummer: 3, sidor: 201-212
Utgivare: KLUWER ACADEMIC PUBL

SLU författare

• Appelberg, Magnus

  • Fiskeriverket

UKÄ forskningsämne

Ekologi

Publikationens identifierare

• DOI: https://doi.org/10.1007/BF00036566

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/87572