Počet záznamů: 1
Variable diet plasticity in Eurasian perch (iPerca fluviatilis/i): Current versus seasonal food uptake
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SYSNO ASEP 0583720 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Variable diet plasticity in Eurasian perch (iPerca fluviatilis/i): Current versus seasonal food uptake Tvůrce(i) 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, ORCIDCelkový počet autorů 5 Zdroj.dok. Ecology of Freshwater Fish. - : Wiley - ISSN 0906-6691
Roč. 32, č. 4 (2023), s. 795-803Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova dependent foraging efficiency ; trophic position ; population-dynamics ; cannibalism ; total niche width Vědní obor RIV DA - Hydrologie a limnologie Obor OECD Marine biology, freshwater biology, limnology CEP QK1920011 GA MZe - Ministerstvo zemědělství Způsob publikování Open access Institucionální podpora BC-A - RVO:60077344 UT WOS 001115008400001 EID SCOPUS 85169152923 DOI 10.1111/eff.12746 Anotace 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. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2024 Elektronická adresa https://doi.org/10.1111/eff.12746
Počet záznamů: 1