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Population dynamics and the trophic role of Aurelia aurita medusae in the Kiel Bight and western Baltic
Schneider, G.; Behrends, G. (1994). Population dynamics and the trophic role of Aurelia aurita medusae in the Kiel Bight and western Baltic. ICES J. Mar. Sci./J. Cons. int. Explor. Mer 51(4): 359-367. http://dx.doi.org/10.1006/jmsc.1994.1038
In: ICES Journal of Marine Science. Academic Press: London. ISSN 1054-3139; e-ISSN 1095-9289
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    ANE, Germany, Schleswig-Holstein, Kiel Bight
    Aquatic organisms > Marine organisms > Aquatic animals > Marine invertebrates
    Behaviour > Feeding behaviour
    Population dynamics
    Aurelia aurita (Linnaeus, 1758) [WoRMS]
    Kiel Bight [Marine Regions]
    Marien/Kust
Auteurs  Top 
  • Schneider, G.
  • Behrends, G.
Abstract
    The population dynamics and the trophic role of Aurelia aurita medusae in the Kiel Bight/western Baltic are described from nine years of investigation between 1978 and 1993. There is considerable yearly variation in standing stock with summer median abundance ranging from 0.2 to 16 ind. 100 m-3 and biomass from 0.2 to 4.4 g C 100 m-3. The lower variation is due to marked differences in size of adult medusae between years. In years of low abundance medusae exhibit an average dise diameter of about 30 cm and weight about 1 kg. In bloom years, however, adult size is only about 20 cm and weight ranges between 200 and 400 g. Estimates of feeding are somewhat contradictory, but feeding rates of 40-80 mg C ind.-1 day-1 seem probable. It can be concluded that Aurelia medusae consume about 2/3 of daily secondary production in years of high abundance, and are thus responsible for a decline of mesozooplankton in these years.
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