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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60076658:12310/24:43908392

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10618 - Ecology

Projekt

<a href="/cs/project/QK23020002" target="_blank" >QK23020002: Produkce násad candáta obecného, jejich adaptibilita a optimalizace jejich vysazování do volných vod.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Lake & Reservoir Management

ISSN

1040-2381

e-ISSN

2151-5530

Svazek periodika

40

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

317-329

Kód UT WoS článku

001287731200001

EID výsledku v databázi Scopus

2-s2.0-85200901698