Selectivity experience of hake (Merluccius hubbsi) with the Argentine fishing sector
Keywords:Selectivity, hake, fishing gears, Argentina
According to the recommendations made by the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP) in 2010, the Federal Fishing Council (CFP) concludes that to maintain the current level of catches in the mid term it is necessary to use selective mechanisms that allow to separate sizes of catches, so that ages 1 and 2, under 35 cm length, achieve the highest possible escape rate (CFP Res. no. 08/2010). The CFP states, besides, that it is advisable to count on the consensus of the industry and continue the search for new options of selectivity systems as alternatives to the DEJUPA considered viable by the INIDEP. To determine size selectivity it is essential to consider the species length at first catch. The Resource Assessment Group on Hake of INIDEP, that estimated size at first maturity at a mean value of 35 cm, considers as juvenile specimens below that size and recommends that said value coincides with the size at first catch. Accordingly, the selectivity research for the resource is aimed at obtaining selective tools that allow to generate a size at first catch or retention size at 50% of L50 = 35 cm. In this paper details are given about the results obtained with the selective fishing devices presented by the argentine fishing industry that the Fishing Gear Group of INIDEP evaluated on board of vessels of different companies. Estimates of the retention curves and selectivity parameters corresponding to each device are presented.
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Copyright (c) 2014 Julio García, Ricardo Roth
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