Data/hora: 10/06/2024 12:13:52

Provedor de dados: | Ocean Docs: e-repository of  publications
País: | Belgium

Título:

Estructura y abundancia del stock reproductor del abadejo (Genypterus blacodes) del Mar Argentino en el período 1995-2000

Structure and abundance of Ling spawning stock (Genypterus blacodes) in Argentine waters during the period 1995-2000

Autores: | Cordo, H.D.
Data: | 2007-07-14
Ano: | 2006
Palavras-chave: | Spawning grounds; Fishery surveys; Population structure; Gadoid fisheries; Population structure; Spawning grounds; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_7277.
Resumo: | The structure and abundance of Ling spawning stock were analized from basic biological and oceanographic data recorded during research surveys carried out by INIDEP between 1995 and 2000, to assess the juveniles fraction of common hake stock (January) and of Argentine patagonian squid (February). Jointly both surveys covered the main spawning area of Ling between 44º S and 48º S and approximately between the mouth of San Jorge Gulf (60º W) and 200 m isobath (65º 30’ W) during the summer season (mid-December to mid-March). Size structures and maturity stages confirmed the presence of a spawning unit in the area covered by the surveys. This enabled the estimate of an annual index of Ling spawning stock abundance. Abundance shows a decreasing trend since 1995, even when it seems to stop during 2000. Nevertheless, abundance estimates during 2000 represent 58% of the corresponding figure for 1995. This represents a significant decrease in the reproductive stock over a relatively short period of time. A possible solution to put an end to the decreasing trend would be to establish a fishing ban area, complementary to that created to protect hake juveniles, extended only during Ling reproductive season, namely every year between December 15 and March 15.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

INIDEP informe técnico, 60. p. 1-17

0327-9642

http://hdl.handle.net/1834/1568

Editor: | Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP)

Formato:

1145188 bytes

application/pdf

Fonte: | Publisher permission