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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00583720" target="_blank" >RIV/60077344:_____/23:00583720 - isvavai.cz</a>

Výsledek na webu

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

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

<a href="/cs/project/QK1920011" target="_blank" >QK1920011: Metodologie kvantifikace dravých druhů ryb ve vodárenských nádržích pro optimalizaci managementu vodních ekosystémů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Ecology of Freshwater Fish

ISSN

0906-6691

e-ISSN

1600-0633

Svazek periodika

32

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

795-803

Kód UT WoS článku

001115008400001

EID výsledku v databázi Scopus

2-s2.0-85169152923