北部湾雷州沿岸鱼类资源现状研究

Studies on status of fishery resources in coastal waters of Leizhou Peninsula in Beibu Gulf

2005年4月和7—8月,采用站位法和底拖网调查法对北部湾雷州沿岸鱼类资源进行调查,共记录247种鱼类,隶属于21目87科161属。研究发现本海域鱼类主要为近岸分布,并表现出热带-亚热带的区系特征,鱼类呈现小型化趋势。9种主要经济鱼类的种群结构合理。鹿斑鲾Leiognathus ruconius、条鲾Leiognathus rivulatus、圆吻海鰶Nematalosa nasus和银鲳Stromateoides argenteus的丰满度系数春季显著大于夏季。部分主要捕获种类未达到最适开捕规格,应该对沿岸海域鱼类资源进行科学管理和合理开发利用。

Using gill net and bottom trawl, an investigation on fish stock was carried out, and 247 fish species belonging to 21 orders, 87 families and 161 genera were collected in the coastal waters of Leizhou Peninsula in Beibu Gulf from April to July in 2005. The results indicated that the fish mainly distributed in the nearshore waters and was characterized by tropical-subtropical species. The fish communities took on character of miniaturization. The population structures of 9 commercial fishes were reasonable. The seasonal changes of fatness coefficients of Leiognathus ruconius, Leiognathus rivulatus, Nematalosa nasus and Stromateoides argenteus were very notable. Some of the major capture species were under the optimum first capture standards. It is very necessary to take measures to protect the nearshore fishery resources.