Počet záznamů: 1  

Cyprinid predation on zooplankton along the longitudinal profile of a canyon-shaped reservoir

  1. 1.
    0150525 - HBU-Z 20033012 RIV DE eng J - Článek v odborném periodiku
    Vašek, Mojmír - Kubečka, Jan - Seďa, Jaromír
    Cyprinid predation on zooplankton along the longitudinal profile of a canyon-shaped reservoir.
    Archiv für Hydrobiologie. Roč. 156, č. 4 (2003), s. 535-550. ISSN 0003-9136
    Grant CEP: GA AV ČR IAA6017201; GA ČR GA206/02/0520
    Grant ostatní: GA FRVŠ(CZ) 346/2000
    Výzkumný záměr: CEZ:AV0Z6017912
    Klíčová slova: fish predation * spatial heterogeneity * zooplankton
    Kód oboru RIV: EH - Ekologie - společenstva
    Impakt faktor: 1.261, rok: 2003

    In the elongated Římov Reservoir, the diet composition of the three cyprinid species, as well as the fish and zooplankton distribution, were investigated at three sites along the longitudinal transect and during two months. The studied fish were roach (Rutilus rutilus), bream (Abramis brama) and bleak (Alburnus alburnus). Their diets along the entire longitudinal transect constituted almost exclusively crustacean zooplankton. Zooplankton density declined gradually downstream in the reservoir. A relatively higher total fish catch per unit effort was found at the upstream end and a decreasing size of Daphnia in zooplankton was observed towards upstream. Such results indicated stronger fish predation pressure in the upstream part of the reservoir during growing season. Moreover, lower diet overlaps within the cyprinid assemblage at the upstream end than within the cyprinid assemblages at the downstream locations suggested intense competition for food at the upstream end of the reservoir.
    Trvalý link: http://hdl.handle.net/11104/0048057

     
     

Počet záznamů: 1  

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