吕泗渔场沿岸海域春夏季鱼类生态类群

Fish assembles in the coastal water of Lüsi fishing ground during spring and summer

根据2010年春夏季吕泗渔场沿岸海域2个航次渔业资源调查资料,对该海域鱼类的种类组成和生态类群结构进行分析,并与我国不同纬度海域进行比较.结果表明:春季(5月)出现鱼类21种,生态类群以暖温种(9种)为主,分别占该季节鱼类总尾数和总质量的45.2%和72.9%;优势种主要由暖温性的小黄鱼、焦氏舌鳎和半滑舌鳎组成.夏季(9月)出现鱼类28种;暖水种(21种)大量出现,分别占该季鱼类总尾数和总质量的75.2%和71.7%,棘头梅童鱼、凤鲚等成为优势种.方差分析表明,两个季节吕泗渔场温度和盐度均差异明显,导致鱼类物种更替,呈现出暖温种、沿岸种和近海种逐渐减少,而暖水种和河口种逐渐增加的趋势.

Based on data from bottom trawl surveys during spring and summer of 2010, the species composition and community structure of fish community in Lusi fishing ground were investigated and compared with those at different latitudes. A total of 21 were identified in spring and 28 identified in summer. In spring, it was mainly composed of warm-temperate fish （9 species）, accounting for 45.2% and 72.9% in the individual density and biomass density, respectively. Warm-temperate species Larimichthys polyactis, Cynoglossus joyneri and Cynoglossus semilaevis were dominant in spring. In summer, warm water species appeared in large numbers by 21, accounting for 75.2% and 71.7% in the individual density and biomass density, respectively. Collichthys lucidus and Coilia mystus were the predominant species in summer. One way-ANOVA indicated that the temper- ature and salinity between spring and summer in Ltisi which resulted in the succession of fish community, i. ate, neritic and nearshore species and the concomitant species. fishing ground were significantly different, e. the gradual decrease of the warm-temper- gradual increase of warm-water and estuarine