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The most important benthic fishery in extension and production of the Southwest Atlantic is that of Patagonian scallop (Zygochlamys patagonica). It is exploited by four factory vessels with non-selective bottom trawl nets and processing plant on board. During the selection process the scallops of commercial size (≥ 55 mm total high) are retained and those that do not reach it (< 55 mm TH) are discarded back to the sea. The purpose of this work was to determine the survival level of non-commercial specimens discarded to the sea and the effect of the selection process on board. Non-commercial scallops coming from deck (control) and discard (treatment) were selected. They were classified according to the level of damage and placed in polypropylene bags to be anchored (~ 100 m depth). The bags were retrieved 10 and 54 d after and the amount of live specimens in each one was registered. The highest survival level was observed in individuals without damage or damaged only on the edges; in those with breaks or perforations in the shell the percentage rounded 50%. It was observed that survival decreased as the time of the experiment increased.

Supervivencia de vieira patagónica de talla no comercial descartada por la pesquería