The diet of predatory fish in drinking water reservoirs how can they contribute to biomanipulation efforts?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F19%3A00518994" target="_blank" >RIV/68081766:_____/19:00518994 - isvavai.cz</a>

Výsledek na webu

<a href="https://bioone.org/journals/folia-zoologica/volume-68/issue-4/fozo.014.2019/The-diet-of-predatory-fish-in-drinking-water-reservoirs-/10.25225/fozo.014.2019.full" target="_blank" >https://bioone.org/journals/folia-zoologica/volume-68/issue-4/fozo.014.2019/The-diet-of-predatory-fish-in-drinking-water-reservoirs-/10.25225/fozo.014.2019.full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.25225/fozo.014.2019" target="_blank" >10.25225/fozo.014.2019</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The diet of predatory fish in drinking water reservoirs how can they contribute to biomanipulation efforts?

Popis výsledku v původním jazyce

Efforts to positively influence ecological processes and water quality by manipulating the fish community (biomanipulation) are of particular importance in drinking water reservoirs. One of the principle measures employed is to increase the abundance of predatory fish species as a means of reducing planktonophagous and benthophagous cyprinids. However, there is little information available on the effectiveness of different predatory fish in biomanipulation exercises. We examined the diet of the five dominant predatory species (pike Esox lucius, zander Sander lucioperca, asp Leuciscus aspius, European catfish Silurus glottis, and perch Perca fluviatilis) in five representative reservoirs in the Morava River drainage basin (Czech Republic). Fish prey made up 75 % of total food intake, with undesirable small cyprinids dominant by biomass (40 %). European catfish and asp were not taken as prey and showed no sign of cannibalism. On the other hand, predation on conspecific predatory species (including cannibalism) was relatively high in perch, pike and zander, thereby reducing their net benefit overall. This little-considered aspect of predatory feeding needs to be taken into consideration in future biomanipulation stocking strategies.

Název v anglickém jazyce

The diet of predatory fish in drinking water reservoirs how can they contribute to biomanipulation efforts?

Popis výsledku anglicky

Efforts to positively influence ecological processes and water quality by manipulating the fish community (biomanipulation) are of particular importance in drinking water reservoirs. One of the principle measures employed is to increase the abundance of predatory fish species as a means of reducing planktonophagous and benthophagous cyprinids. However, there is little information available on the effectiveness of different predatory fish in biomanipulation exercises. We examined the diet of the five dominant predatory species (pike Esox lucius, zander Sander lucioperca, asp Leuciscus aspius, European catfish Silurus glottis, and perch Perca fluviatilis) in five representative reservoirs in the Morava River drainage basin (Czech Republic). Fish prey made up 75 % of total food intake, with undesirable small cyprinids dominant by biomass (40 %). European catfish and asp were not taken as prey and showed no sign of cannibalism. On the other hand, predation on conspecific predatory species (including cannibalism) was relatively high in perch, pike and zander, thereby reducing their net benefit overall. This little-considered aspect of predatory feeding needs to be taken into consideration in future biomanipulation stocking strategies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10613 - Zoology

Projekt

<a href="/cs/project/QJ1620240" target="_blank" >QJ1620240: Aplikace biomanipulací s využitím "top-down" efektu s cílem omezit negativní dopady zemědělství na eutrofizaci vodárenských nádrží</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Folia zoologica

ISSN

0139-7893

e-ISSN

—

Svazek periodika

68

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

215-224

Kód UT WoS článku

000500279000001

EID výsledku v databázi Scopus

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