Data/hora: 08/06/2024 12:31:10

Provedor de dados: | 20
País: | Belgium

Título:

Evaluación de la merluza (Merluccius hubbsi) en julio y agosto de 1994, entre 34º y 36ºS del Atlántico sudoccidental.

Hake (Merluccius hubbsi) stock assessment in July and August 1994 between 34º and 46ºS in the Southwest Atlantic.

Autores: | Villarino, M.F.; Simonazzi, M.A.; Bambill, G.A.; Ibañez, P.M.; Castrucci, R.; Reta, R.
Data: | 2008-07-28
Ano: | 2000
Palavras-chave: | Stock assessment; Abundance; Biomass; Fishery surveys; Population structure; Stock assessment; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115.
Resumo: | This report contains the objectives, data collected and results from a hake assessment survey carried out in the Argentine Sea between 34° and 46° S, during July and August 1994, on board of the R/Vs "Dr. E. L. Holmberg" and "Cap. Oca Balda". The main objectives of the survey were: 1) to estimate total biomass and total abundance per age class; 2) to study the size and age composition; 3) to define the maturity ogive per size and age; 4) to quantitatively determine cannibalism and predation indexes. The area covered by the survey where 149 trawls and 184 oceanographic stations were performed was close to 100,440 nm2 . Hake biomass between 34° and 46° S was estimated in 1,105,284 tons and the confidence interval at 95.  was ± 23.12. . Most of the biomass corresponded to the area between 41° and 46° S. It was estimated in 737,435 tons and it represented 67.  of the total biomass. The abundance of the area between 34° and 41° S was 367,847 tons (33  ). The "Common Fishing Zone" biomass was 230,618 tons (21. ). Two concentration areas were found: one between 35° - 36° S° with a large presence of individuals smaller than 35 cm (60 to 90.  and a second between 42° and 44° S with densities of up to 165 and 82 tons/nm2 respectively. The first area showed an unimodal length structure and the second showed a bimodal one. Hydrographic characteristics were normal for the period, shelf-waters were homogeneous in temperature and the Malvinas waters restricted to the continental slope.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

INIDEP informe técnico, 40. p. 1-46

0327-9642

http://hdl.handle.net/1834/2591

Editor: | Mar del Plata: Instituto Nacional de Investigacion y Desarrollo Pesquero