Hungry catfish-effect of prey availability on movement dynamics of a top predator

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F25%3A00646902" target="_blank" >RIV/60077344:_____/25:00646902 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/25:43909889

Result on the web

<a href="https://doi.org/10.1111/fwb.70017" target="_blank" >https://doi.org/10.1111/fwb.70017</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/fwb.70017" target="_blank" >10.1111/fwb.70017</a>

Result language

angličtina

Original language name

Hungry catfish-effect of prey availability on movement dynamics of a top predator

Original language description

The availability and spatial distribution of prey determine the energetic costs of predators foraging and largely drive their space use, activity level and foraging timing. Consequently, predators in ecosystems with different prey availability and distribution should adjust their movement patterns to optimise their foraging success in order to maximise efficiency. The aim of this study was to investigate the ability of a top predator, European catfish (Silurus glanis), to adapt its space use, temporal activity and diet patterns in environments with varying prey density and distribution and to examine the consequences for the catfish's body growth. Catfish activity, tracked with high-resolution acoustic telemetry positioning systems deployed in two oligotrophic lakes with limited fish prey and one eutrophic reservoir with abundant fish prey, showed clear differences in their spatial and foraging behaviour. In oligotrophic, prey-poor lakes, catfish showed larger space use, altered diurnal activity patterns, reduced use of the open water, increased variability in inter- and intra-individual space use and had a more diverse diet compared to their conspecifics in the eutrophic, prey-rich reservoir. The reduced availability of prey in oligotrophic lakes resulted in slower catfish growth, as the adaptations could not fully compensate for the reduced abundance of prey fish. The study showed that top predators can combine different behavioural mechanisms and individual strategies to adapt to different ecological contexts. The observed ability of catfish to adjust activity, space use and diet reflects an adaptive strategy to improve foraging efficiency and overall fitness in varying habitats. These behavioural adaptations may provide catfish with advantages over other top predators in terms of resource exploitation. Such competitive abilities are important for the catfish's success as an invasive species within Europe.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10618 - Ecology

Project

<a href="/en/project/QK23020002" target="_blank" >QK23020002: Pikeperch fry production, their adaptability and optimalization of their stocking into openwaters.</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Freshwater Biology

ISSN

0046-5070

e-ISSN

1365-2427

Volume of the periodical

70

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

e70017

UT code for WoS article

001438191300001

EID of the result in the Scopus database

2-s2.0-86000335991