Počet záznamů: 1

Diel variation in gillnet catches and vertical distribution of pelagic fishes in a stratified European reservoir

  1. 1.
    SYSNO ASEP0320834
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    NázevDiel variation in gillnet catches and vertical distribution of pelagic fishes in a stratified European reservoir
    Překlad názvuKolísavost tenatových úlovků v průběhu denního cyklu a vertikální rozmístění ryb v pelagiálu evropské nádrže
    Tvůrce(i)Vašek, Mojmír (BC-A) - Kubečka, Jan (BC-A) - Čech, Martin (BC-A) - Draštík, Vladislav (BC-A) - Matěna, Josef (BC-A) - Mrkvička, T. (CZ) - Peterka, Jiří (BC-A) - Prchalová, Marie (BC-A)
    Rozsah stran64 - 69
    Zdroj.dok.Fisheries Research. - : Elsevier - ISSN 0165-7836
    Poč.str.6 s.
    AkceFish Stock Assessment Methods for Lakes and Reservoirs: Towards the true picture of fish stock
    Datum konání11.09.2007-15.09.2007
    Místo konáníČeské Budějovice
    ZeměCZ - Česká republika
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.NL - Nizozemsko
    Klíč. slovagillnet ; diel catchability ; distribution ; epilimnetic fishes ; CPUE ; man-made lake
    Vědní obor RIVDA - Hydrologie a limnologie
    CEP1QS600170504 GA AV ČR - Akademie věd
    IAA600170502 GA AV ČR - Akademie věd
    GP206/06/P418 GA ČR - Grantová agentura ČR
    CEZAV0Z60170517 - HBU-Z, BC-A (2005-2011)
    UTISI000263396600010
    DOI10.1016/j.fishres.2008.09.010
    AnotaceDiel 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.
    PracovištěBiologické centrum (od r. 2006)
    KontaktVáclava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889
    Rok sběru2009