文章基本信息

标题：Merluccius hubbsi (Teleostei: Merlucciidae): stock identification based on reproductive biology in the south-southeast brazilian region
其他标题：Merluccius hubbsi (Teleostei: Merlucciidae): stock identification based on reproductive biology in the south-southeast brazilian region
本地全文：下载
作者：Vaz-dos-Santos, André Martins ; Rossi-Wongtschowski, Carmen Lúcia Del Bianco ; Figueiredo, José Lima de 等
期刊名称：Brazilian Journal of Oceanography
印刷版ISSN：1679-8759
电子版ISSN：1982-436X
出版年度：2009
卷号：57
期号：1
页码：17-31
DOI：10.1590/S1679-87592009000100003
出版社：Instituto Oceanográfico da Universidade de São Paulo
摘要：The Argentine hake, Merluccius hubbsi, a demersal-pelagic species found from Rio de Janeiro, Brazil to the Tierra del Fuego, Argentina, has become an important target of the Brazilian bottom-trawler fleet since 2001. Earlier studies focusing on the species have suggested that more than one stock might occur off the Brazilian coast, in accordance with environmental features. In order to evaluate this hypothesis, fish were collected from four different areas in the Brazilian waters in which the hake is distributed, during the summers and winters of 1996-2001 and 2004, the females being used to analyze and compare spatial-temporal variations in ovarian maturation. Gonad indexes were also applied for the same purpose. Results indicate a north-south spawning gradient occurring as from summer at around 21°S to winter near 34°S, leading to the identification of two distinct stocks: one located between 21°S and 29°S (Southeastern stock) and the other between 29°S and 34°S (Southern stock), this latter shared with Uruguay and Argentina. Brazilian stocks present clear signs of overexploitation, the situation calling for an urgent solution.
关键词：Merluccius hubbsi;Reprodução;Desova;Estoques;Sudeste-Sul do Brasil
其他关键词：Merluccius hubbsi;Reproduction;Spawning;Stocks;Southeast-South Brazilian Region