Fish predation on newly stocked juvenile predatory fish in a biomanipulated reservoir

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F24%3A00605294" target="_blank" >RIV/60077344:_____/24:00605294 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/24:43908392

Result on the web

<a href="https://doi.org/10.1080/10402381.2024.2374981" target="_blank" >https://doi.org/10.1080/10402381.2024.2374981</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/10402381.2024.2374981" target="_blank" >10.1080/10402381.2024.2374981</a>

Result language

angličtina

Original language name

Fish predation on newly stocked juvenile predatory fish in a biomanipulated reservoir

Original language description

Juveniles of pikeperch, asp, and northern pike were stocked into the Rimov Reservoir. Subsequently, potential fish predators were monitored by gillnets at the stocking sites and their diet was analyzed for presence of stocked fish. Asp and European perch were predominant predators, while pikeperch and northern pike were less abundant in gillnet catches. Digestive tract analysis revealed the highest percentage of ingested fish in northern pike, followed by pikeperch, asp, and European perch. The amount of stocked fish did not correlate with the number of predatory fish caught in gillnets. When asp was stocked, this species was strongly preferred by northern pike and partly by pikeperch and 0.3 individual of stocked asp was eaten per 1 kg of predatory fish captured by gillnets. During the northern pike stocking, this species was mainly preyed upon by asp and occasionally by northern pike, and 0.8 individual of stocked northern pike was eaten per 1 kg of predatory fish. When pikeperch was stocked, it was strongly preferred by pikeperch, northern pike, and European perch, it was almost absent in the diet of asp, and 1.1 individual of stocked pikeperch was eaten per 1 kg of predators. Our results indicate that pikeperch juveniles had the highest mortality rate due to predation after stocking, mainly due to sedentary behavior and the high proportion of cannibalism. In northern pike, cannibalism was found in only one case, and was never found in asp, which was under the lowest predation pressure.

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

2024

Confidentiality

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

Name of the periodical

Lake & Reservoir Management

ISSN

1040-2381

e-ISSN

2151-5530

Volume of the periodical

40

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

317-329

UT code for WoS article

001287731200001

EID of the result in the Scopus database

2-s2.0-85200901698