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    Estimation of the green weight of krill caught

    Solicitar acceso a documento de reunión
    Número de documento:
    WG-EMM-14/29
    Autor(es):
    Secretariat
    Presentado por:
    Mr Doug Cooper (Secretaría de la CCRVMA)
    Punto(s) de la agenda
    Resumen

    Vessels operating in the krill fishery in CCAMLR’s Convention Area have been required to directly estimate the green weight of krill caught since 2012/13. The estimation methods were revised at WG-EMM-13 and published in Conservation Measure 21-03 Annex B. Estimates of green weight and parameter values are reported in each vessel’s haul-by-haul catch and effort data. This paper reviews the data reported in 2013/14 (to May 2014).

    Vessels fishing in 2013/14 used six methods for the direct estimation of the green weight of krill caught: codend volume, holding tank volume, flow meter, flow scale, plate tray and meal conversion. The submission of green weight estimates and parameter values continues to improve; however some vessels may still experience difficulty in measuring and/or reporting parameters at the required frequency. In addition, some data submissions included additional formulae to the CCAMLR data forms and these suggest that certain parameter values may have been back-calculated. This may indicate that some estimation methods (e.g. flow meter) require further development, or some parameters cannot be measured directly or safely. WG-EMM may wish to consider this matter further.