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Biology and fishery of the Southern hake (Merluccius australis) in the Southwest Atlantic Ocean.

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Author
Giussi, A.R.
Gorini, F.L.
Di Marco, E.J.
Zavatteri, A.
Marí, N.
Date
2016

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Alternative Title
Biología y pesquería de la merluza austral (Merluccius australis) en el Océano Atlántico Sudoccidental.
Abstract
Southern hake (Merluccius australis) is distributed mainly south of 50° S around South America, occurring in cold temperate waters of subantarctic origin. In the Southwest Atlantic Ocean (SAO) only adults are abundant. This species is icththyophagous and malacophagous, feeding mainly on long tail hake (Macruronus magellanicus) and several cephalopods (Illex argentinus, Onykia ingens, Doryteuthis gahi). Age and growth studies show significant sexual differences; females grow to a larger size than males. In recent years, the highest biomasses, estimated from trawl surveys using the swept area method, are about 10,000 t. Fish 4 to 8 years old usually dominate commercial landings. Only a few factory trawler vessels have southern hake as a target species. They operate over the main fishing grounds located near Tierra del Fuego and at the eastern mouth of the Beagle Channel. Average annual landings are about 5,000 t.
La merluza austral (Merluccius australis) se distribuye principalmente al sur de los 50° S alrededor de América del Sur, encontrándose en aguas templado-frías de origen subantártico. En el Océano Atlántico Sudoccidental, solo los adultos son abundantes. Esta especie es ictiófaga y malacófaga, y se alimenta principalmente de la merluza de cola (Macruronus magellanicus) y de varias especies de cefalópodos (Illexargentinus, Onykiaingens, Doryteuthisgahi). Los estudios de edad y crecimiento indican la presencia de diferencias significativas entre sexos, siendo las hembras mayores que los machos. En los últimos años, las biomasas más altas estimadas por el método de área barrida, se encontraron alrededor de las 10.000 t. Las capturas se encuentran principalmente integradas por individuos de 4 a 8 años de edad y solo unos pocos buques factoría arrastreros capturan a la merluza austral como especie objetivo. Dichos buques operan en los principales caladeros, próximos a Tierra del Fuego y a la entrada este del Canal Beagle. Los desembarques promedios anuales se encuentran cercanos a las 5.000 t.
Journal
Revista de Investigación y Desarrollo Pesquero
Volume
28
Page Range
pp.37-53
URI
http://hdl.handle.net/1834/10966
Collections
Revista de Investigación y Desarrollo Pesquero

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