Distribución, estructura de tallas, alimentación y pesca de la merluza negra (Dissostichus eleginoides Smith, 1898) en un sector del Atlántico Sudoccidental.

Autores: María Cristina Cassia y Ricardo G. Perrotta.

Contribución INIDEP 932

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Citar como:
Cassia, M.C.; Perrotta, R.G. 1996. Distribución, estructura de tallas, alimentación y pesca de la merluza negra (Dissostichus eleginoides Smith, 1898) en un sector del Atlántico Sudoccidental. INIDEP Informe Técnico 9, 19 p. Disponible en: http://hdl.handle.net/1834/7044.

Summary

Distribution, size structure, feeding habits and fishing of Patagonian toothfish (Dissostichus eleginoides) in the Argentine Sea. The distribution of Patagonian toothfish extends between of 36°30’S and 55°S between 80 and 1800 m depth. Greatest concentrations area found south and NE of the Malvinas Islands, East of Burdwood Bank and over the slope of Buenos Aires province. Bottom temperatures ranged between 2°C and 12°C. Extreme sizes were between 12 and 200 cm, and most of the adult sizes were found (80 cm) in waters at depths greater than 1000 meters. The stomach contents of Patagonian toothfish include a number of specific food components of the groups crustaceans, cephalopods and fishes. The trophic spectrum decreases as it approaches to the bottom, crustaceans are found in stomach contents between 39 an 100 meters and at or over 1000 meters the species feeds exclusively on fishes. Long-line fishing is recomended starting from 1000 meters depths. Deep-trawling nets should not be used in areas between 54° to 55°S and 61° to 64°W, suffering the greatest fishing impact, in order to avoid juvenile catches of this species. The mean yield was estimate at 0.64 Kg/hooks.