Number of the records: 1  

In situ diel patterns of zooplankton consumption by subadult/adult roach, Rutilus rutilus, bream, Abramis brama, and bleak Alburnus alburnus

    1.
    SYSNO ASEP0104274
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JOstatní články
    TitleIn situ diel patterns of zooplankton consumption by subadult/adult roach, Rutilus rutilus, bream, Abramis brama, and bleak Alburnus alburnus
    TitleDenní periodicita příjmu zooplanktonu ploticí (Rutilus rutilus), cejnem (Abramis brama) a ouklejí (Alburnus alburnus) v přirozených podmínkách
    Author(s) Vašek, Mojmír (HBU-Z)
    Kubečka, Jan (HBU-Z)
    Source TitleFolia zoologica. - : Ústav biologie obratlovců AV ČR, v. v. i. - ISSN 0139-7893
    Roč. 53, č. 2 (2004), s. 203-214
    Number of pages12 s.
    Languageeng - English
    CountryCZ - Czech Republic
    Keywordsfeeding periodicity ; gut fullness ; cyprinids
    Subject RIVEG - Zoology
    R&D ProjectsIAA6017201 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
    AnnotationDiel feeding patterns of subadult and adult cyprinids of three species (roach Rutilus rutilus, bream Abramis brama, bleak Alburnus alburnus), which foraged almost exclusively on microcrustacean plankton, were studied in the meso-eutrophic Římov Reservoir (Czech Republic). All cyprinids showed a daytime feeding periodicity, with a marked decline in their gut fullness was regularly observed after the onset of darkness. Diel variations in gut fullness were observed in roach 200-270 mm standard length (SL) and bream 220-330 mm SL during May and in bleak, roach and bream of 110-170 mm SL, respectively, during August. Our results corroborate other studies in which light intensity has been found to be an important factor affecting cyprinid foraging on zooplankton. Daily zooplankton consumption rates ranged from 1.5 % of wet body weight in bream (220-330 mm SL) to 9.9 % of wet body weight in bleak (110-170 mm SL).
    WorkplaceInstitute of Hydrobiology (until 2005)
    ContactVáclava Lavičková, lavickova@hbu.cas.cz, Tel.: 387 775 889
    Year of Publishing2005
Number of the records: 1  

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