Affiliation:
1. Faculty of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Box 400, N-2414 Elverum, Norway
Abstract
Perch (Perca fluviatilis) in four boreal lakes and sympatric roach (Rutilis rutilis) in two of these lakes were studied by means of gill net sampling, and age and growth were analyzed to explore whether summer temperature affects recruitment and individual growth of the two species differently. Water temperature logging in the lakes showed a highly significant correlation with air temperature. Year-class strength of the perch was significantly positively affected by the summer air temperature, whereas the temperature effect was non-significant for the roach. There was a significant negative effect of year-class strength of one-year-old perch on roach year-class strength in one lake. ln one of the allopatric perch populations, the year-class strength correlation with temperature failed after biomass removal, probably because fishing affected the age structure. July–August air temperature had a significantly positive effect on individual growth rates of two- to five-year-old perch, whereas the effect on roach growth was less clear. The inclination of perch to predate its competitor, roach, as well as conspecifics, as well as accelerated individual growth, were shown to occur more frequently in years with abundant 1+ perch, i.e., the summer after the rise of a strong year-class. Climate warming may potentially favor perch recruitment and growth.
Subject
Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Reference80 articles.
1. Lindsey, R., and Dahlman, L. (2023, May 09). Climate Change: Global Temperature, Available online: https://www.climate.gov/news-features/understanding-climate/climate-change-global-temperature.
2. Climate change and changes in global precipitation patterns: What do we know?;Dore;Environ. Int.,2005
3. Climate change impact on major crop yield and water footprint under CMIP6 climate projections in repeated drought and flood areas in Thailand;Arunrat;Sci. Total Environ.,2022
4. EPA. U.S. Environmental Protection Agency (2023, May 09). Climate Change Indicators: Ecosystems. 2021 02.082022, Available online: https://www.epa.gov/climate-indicators/ecosystems.
5. Environmental correlates of population variables of perch (Perca fluviatilis) in boreal lakes;Bergman;Environ. Biol. Fishes,2008
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