A stinging tale? Looking for Catostylus jellyfish nematocysts in the gills of trawled-and-discarded fish in southeastern Australia

Sven Sebastian Uhlmann, Matt K. Broadhurst, Craig P. Brand

    Onderzoeksoutput: Bijdrage aan congresGepubliceerd abstract

    Uittreksel

    Nematocyst cells ejected by gelatinous zooplankton (e.g. cnidarians and ctenophores; ‘jellyfish’) are harmful for many organisms, including humans. Despite more frequent blooming events in warm, productive coastal waters, the effects of nematocyst cells on wild-fisheries catches remain understudied in Australia and elsewhere. During a study to maximise the survival of discarded bycatch from penaeid trawls in New South Wales, Australia, jellyfish (Catostylus spp) in the catch (between 16 and 80% by weight) had a significant, deleterious effect on the survival of surf bream (Acanthopagrus australis), Castelnau’s herring (Herklotsichthys castelnaui) and common silver biddy (Gerres subfasciatus). Further, surviving surf bream showed a positive relationship between their blood glucose and potassium concentrations and the abundance of jellyfish in catches. During a subsequent study, gill histopathology on trawl-caught surf bream identified sloughing and congestion of tissue, but no nematocyst cells. However, this result may reflect relatively low catches of jellyfish.
    Oorspronkelijke taalEngels
    Aantal pagina’s1
    PublicatiestatusGepubliceerd - 15-sep-2014
    EvenementICES Annual Science Conference - La Coruna, Spanje
    Duur: 15-sep-201419-sep-2014
    http://www.ices.dk/news-and-events/asc/ASC-2014/Pages/default.aspx

    Congres

    CongresICES Annual Science Conference
    LandSpanje
    StadLa Coruna
    Periode15/09/1419/09/14
    Internet adres

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    • B280-dierenecologie

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