Variable diet plasticity in Eurasian perch (Perca fluviatilis): Current versus seasonal food uptake

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F23%3A43907246" target="_blank" >RIV/60076658:12310/23:43907246 - isvavai.cz</a>

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/10.1111/eff.12746" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1111/eff.12746</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/eff.12746" target="_blank" >10.1111/eff.12746</a>

Result language

angličtina

Original language name

Variable diet plasticity in Eurasian perch (Perca fluviatilis): Current versus seasonal food uptake

Original language description

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&apos;s nutritional values rather than the proportion of different prey consumed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Ecology of Freshwater Fish

ISSN

0906-6691

e-ISSN

1600-0633

Volume of the periodical

32

Issue of the periodical within the volume

4

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

795-803

UT code for WoS article

001115008400001

EID of the result in the Scopus database

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