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Variable diet plasticity in Eurasian perch (iPerca fluviatilis/i): Current versus seasonal food uptake
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SYSNO ASEP 0583720 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Variable diet plasticity in Eurasian perch (iPerca fluviatilis/i): Current versus seasonal food uptake Author(s) Vejříková, Ivana (BC-A) RID, ORCID
Vejřík, Lukáš (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCID
Blabolil, Petr (BC-A) RID, ORCID
Peterka, Jiří (BC-A) RID, ORCIDNumber of authors 5 Source Title Ecology of Freshwater Fish. - : Wiley - ISSN 0906-6691
Roč. 32, č. 4 (2023), s. 795-803Number of pages 9 s. Language eng - English Country US - United States Keywords dependent foraging efficiency ; trophic position ; population-dynamics ; cannibalism ; total niche width Subject RIV DA - Hydrology ; Limnology OECD category Marine biology, freshwater biology, limnology R&D Projects QK1920011 GA MZe - Ministry of Agriculture (MZe) Method of publishing Open access Institutional support BC-A - RVO:60077344 UT WOS 001115008400001 EID SCOPUS 85169152923 DOI 10.1111/eff.12746 Annotation Diet plasticity is often studied in Eurasian perch (Perca fluviatilis), a species commonly described as having generalist populations composed of specialised individuals. Perch diet was examined using gut content analysis (GCA) and stable isotope analysis (SIA), and individual specialisation was calculated in two study lakes within 2years. Mostly only one diet category was present in the perch stomach, with more variation in the diet in the Most lake compared to the Milada lake between 2013 and 2014. The calculated degree of individual specialisation indicated higher specialisation in the Most lake. Interestingly, despite the different or almost uniform diet composition between the years, the total niche width (based on SIA) of the population remained similar in both lakes. This suggests that the overall variation in the sources utilised by the entire population remained consistent between the years. GCA mostly indicated zooplankton as the prevailing food source, whereas SIA indicated significant utilisation of YOY fish earlier that year, an information that was completely missed by the GCA of fish caught in September. The differences between GCA and SIA results could be attributed to the different time intervals reflected by the methods, but possibly to the conversion of the diet into the body tissues that is reflected by SIA and may depend on the diet's nutritional values rather than the proportion of different prey consumed. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2024 Electronic address https://doi.org/10.1111/eff.12746
Number of the records: 1