The diet of Eurasian perch larvae in lakes with different zooplankton assemblages
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Kuupäev
2023
Kättesaadav alates
Ajakirja pealkiri
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Kirjastaja
Abstrakt
Eurasian perch has a great ecological importance in freshwaters as it is often a dominating predatory fish in ecosystems. The knowledge of perch feeding patterns, strategies,
and adaptivity to food environment in their early life stages is essential to understand its
population development and dynamics. It has been demonstrated that there exists a positive
relationships between preferred prey availability and larval feeding success. We examined
the diet of larval perch in their natural habitats of different zooplankton assemblages in
three small lakes with varying ecological status. In each lake, both pelagial and littoral
were studied. We found significant relation between zooplankton biomass in the lake and
zooplankton biomass consumed by fish larvae. The most important food objects were crus-
taceans (Bosmina longirostris, Chydorus sphaericus). Ciliates were consumed only in one
lake. Our results show that perch larvae are flexible in their choice of food and can adapt to
different food environments.
The research is a part of the project "Fish feeding conditions in lakes with different planktonic food web structure and macrovegetation (MICROFISH)", No.1.1.1.2/VIAA/1/18/301. Agreement with State Educa- tion Development Agency of the Republic of Latvia No. Programme number 1.1.1.2/16/I/001. The project is financed by the European Regional Development Fund, the State budget of the Republic of Latvia and the foundation "Insti- tute for Environmental Solutions". Funding of this project was also provided by the European Union's Horizon 2020 research and innovation programme under grant agreement No 951963. Our great thanks to Nicholas Anthony Heredia from Latvian Institute of Aquatic Ecology who checked English.
The research is a part of the project "Fish feeding conditions in lakes with different planktonic food web structure and macrovegetation (MICROFISH)", No.1.1.1.2/VIAA/1/18/301. Agreement with State Educa- tion Development Agency of the Republic of Latvia No. Programme number 1.1.1.2/16/I/001. The project is financed by the European Regional Development Fund, the State budget of the Republic of Latvia and the foundation "Insti- tute for Environmental Solutions". Funding of this project was also provided by the European Union's Horizon 2020 research and innovation programme under grant agreement No 951963. Our great thanks to Nicholas Anthony Heredia from Latvian Institute of Aquatic Ecology who checked English.
Kirjeldus
Märksõnad
Eurasian perch, larvaes, zooplankton, lakes, articles