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The diet of predatory fish in drinking water reservoirs how can they contribute to biomanipulation efforts?
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SYSNO ASEP 0518994 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title The diet of predatory fish in drinking water reservoirs how can they contribute to biomanipulation efforts? Author(s) Adámek, Zdeněk (UBO-W) RID, SAI, ORCID
Mikl, Libor (UBO-W) SAI, ORCID
Šlapanský, Luděk (UBO-W) SAI, SAI
Jurajda, Pavel (UBO-W) RID, SAI, ORCID
Halačka, Karel (UBO-W) RID, SAINumber of authors 5 Source Title Folia zoologica. - : Ústav biologie obratlovců AV ČR, v. v. i. - ISSN 0139-7893
Roč. 68, č. 4 (2019), s. 215-224Number of pages 10 s. Language eng - English Country CZ - Czech Republic Keywords population-dynamics ; european catfish ; prey selection ; resource use ; lake ; food ; cannibalism ; consumption ; food habits ; Esox lucius ; Sander lucioperca ; Leuciscus aspius ; Perca fluviatilis ; Silurus glanis Subject RIV EG - Zoology OECD category Zoology R&D Projects QJ1620240 GA MZe - Ministry of Agriculture (MZe) Method of publishing Open access Institutional support UBO-W - RVO:68081766 UT WOS 000500279000001 EID SCOPUS 85099059656 DOI 10.25225/fozo.014.2019 Annotation 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. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2020 Electronic address 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
Number of the records: 1