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Diel variation in gillnet catches and vertical distribution of pelagic fishes in a stratified European reservoir
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SYSNO ASEP 0320834 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Diel variation in gillnet catches and vertical distribution of pelagic fishes in a stratified European reservoir Title Kolísavost tenatových úlovků v průběhu denního cyklu a vertikální rozmístění ryb v pelagiálu evropské nádrže Author(s) Vašek, Mojmír (BC-A) RID, ORCID
Kubečka, Jan (BC-A) RID, ORCID
Čech, Martin (BC-A) RID, ORCID
Draštík, Vladislav (BC-A) RID, ORCID
Matěna, Josef (BC-A) RID
Mrkvička, T. (CZ)
Peterka, Jiří (BC-A) RID, ORCID
Prchalová, Marie (BC-A) RID, ORCIDSource Title Fisheries Research. - : Elsevier - ISSN 0165-7836
Roč. 96, č. 1 (2009), s. 64-69Number of pages 6 s. Action Fish Stock Assessment Methods for Lakes and Reservoirs: Towards the true picture of fish stock Event date 11.09.2007-15.09.2007 VEvent location České Budějovice Country CZ - Czech Republic Event type WRD Language eng - English Country NL - Netherlands Keywords gillnet ; diel catchability ; distribution ; epilimnetic fishes ; CPUE ; man-made lake Subject RIV DA - Hydrology ; Limnology R&D Projects 1QS600170504 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) IAA600170502 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GP206/06/P418 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z60170517 - HBU-Z, BC-A (2005-2011) UT WOS 000263396600010 DOI 10.1016/j.fishres.2008.09.010 Annotation Diel changes in gillnet catch rates and vertical distributions of pelagic fishes were examined in a deep, moderately eutrophic European reservoir. The investigation was carried out in late summer, when steep vertical gradients in temperature and dissolved oxygen developed in the reservoir. The total gillnet catch per unit effort was on average 3–4 times higher at twilight than during the day or at night. Decreased net visibility and increased fish activity were likely responsible for the high catches at dusk and dawn periods. The catches of individual species were not distributed uniformly across the epilimnion/metalimnion. The majority of bleak and asp were captured in the surface layer, irrespective of day, twilight or night. During the daytime, roach were most abundant in the layer just above the thermocline, but at night they occupied the upper part of the epilimnion. Perch inhabited the lower epilimnion and the upper metalimnion during the daytime and twilight. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2009
Number of the records: 1