Počet záznamů: 1

Sinusoidal swimming in fishes: the role of season, density of large zooplankton, fish length, time of the day, weather condition and solar radiation

  1. 1.
    0349545 - BC-A 2011 RIV NL eng J - Článek v odborném periodiku
    Jarolím, Oldřich - Kubečka, Jan - Čech, Martin - Vašek, Mojmír - Peterka, Jiří - Matěna, Josef
    Sinusoidal swimming in fishes: the role of season, density of large zooplankton, fish length, time of the day, weather condition and solar radiation.
    Hydrobiologia. Roč. 654, č. 1 (2010), s. 253-265 ISSN 0018-8158
    Grant CEP: GA ČR(CZ) GA206/07/1392; GA ČR(CZ) GP206/09/P266; GA AV ČR(CZ) 1QS600170504
    Výzkumný záměr: CEZ:AV0Z60170517
    Klíčová slova: common bream Abramis brama * Daphnia * echosounder * Leptodora * roach Rutilus rutilus * Římov Reservoir * Sonar5
    Kód oboru RIV: EG - Zoologie
    Impakt faktor: 1.964, rok: 2010

    The sinusoidal swimming of fish was studied in Římov Reservoir, Czech Republic, using a bottom-mounted transducer. The proportion of sinusoidally swimming fish increased from April to August while this behaviour was absent in October. The majority of records came from fish of standard length 100 - 400 mm, which represents the typical size range of common bream and roach of age >1+, the main zooplanktivores in the reservoir. The presence of these larger fish in the open water, as well as the presence of sinusoidal swimming, correlates with the presence of large zooplankton (Daphnia, Leptodora) in the epilimnion. The increase of sinusoidal swimming between April, June and August resulted in an increase of zooplankton component in fish guts. High values of solar radiation and stable calm weather result in optimal optical conditions for sinusoidal swimming, making this foraging behaviour more efficient and widely used in fishes exploiting the zooplankton production in the reservoir.
    Trvalý link: http://hdl.handle.net/11104/0189754