厦门海域渔业资源现存量评析

Current Fisheries Resources Assessment in Xiamen Coastal Waters

2006—2007年夏季(2006年8月)、冬季(2007年1月)、春季(2007年4月)和秋季(2007年10月)在厦门海域利用底拖网渔船开展渔业资源调查.根据调查资料,对厦门海域(约2 713 km2)的渔业资源现状进行了评析.研究结果表明,4个季节渔业资源平均密度为981.97 kg/km2,其中秋季居首位,约为1 261.39 kg/km2;冬季和夏季次之,分别为951.31 kg/km2和936.93 kg/km2;而春季资源密度最低,约为778.24 kg/km2.各个季节的资源密度,鱼类均居首位,甲壳类次之,头足类最低.各季节鱼类优势种分别为:春季鱼类优势种有6种,以二长棘鲷(Parargyrops edita)幼鱼和短吻鲾(Leiognathus brevirostris)分别为第一和第二优势种;夏季有7种,以中华海鲶(Arius sinensis)和叫姑鱼(Johnius belengerii)分别为第一和第二优势种;秋季也有7种,以龙头鱼(Harpadon nehereus)、叫姑鱼和中华海鲶为主要优势种;冬季有4种,以叫姑鱼为最主要优势种.4个季节的平均渔业资源现存量约为1 694.71 t;渔业潜在可捕量约10 523 t.渔业资源分布与水温、水深及盐度关系较密切.该海域渔业资源已经明显衰退,急需加强渔业资源的管理和保护.

Based on the survey data collected by bottom trawl research in August 2006, January 2007, April 2007 and October 2007 in Xiamen coastal waters about 2 713 km2, the sweep area method was used to assess the average fisheries resources density and the fisheries resources. The results showed that the highest density was in autumn, around 1 261.39 kg/km2, winter and summer and 936. 93 kg/km2 respectively, and spring was the least, of 778.24 were next, around 951.31 kg/km2 kg/km2. In this four seasons, the density of current fish resources was the highest, crustacean the next, while cephalopod the least. The domi- nant fishes in spring had six species, such as Parargyrops edita and Leiognathus brevirostris, etc. ; seven species in summer, such as Arius sinensis and Johnius belengerii, etc. ; also seven species in autumn, such as Harpadon nehereus, Johnius belengerii and Arius sinensis, etc. Johnius belengerii, etc. The current fisheries resources in Xiamen ; and four species in winter, such as coastal was about 1 694. 71 t, while the sustainable yield was up to 10 523 t by nutrient dynamic model. The distribution of fisheries resources had an obvious relationship with salinity, water temperature and depth. Furthermore, the fisheries resources were dramatically declining and urgent protection measures should be taken immediately.