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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 the survey data of fishery resources of two voyages in the coastal waters of Lusi Fishing Ground in the spring and summer of 2010, the species composition and the ecological taxonomic structure of fishes in the sea area were analyzed and compared with those of different latitudes in China. The results showed that spring (May) There were 21 species of fish, and the dominant species were warm warm species (9 species), accounting for 45.2% and 72.9% of the total mantissa and total mass of the season respectively. The dominant species were mainly warm-temperate small yellow croaker, (21 species) appeared in large numbers, accounting for 75.2% and 71.7% of the total number of mandarin fish and the total mass of the season,鲚 and etc. became the dominant species.Analysis of variance showed that there were significant differences in temperature and salinity of Luosi fishing ground in two seasons, resulting in the replacement of fish species, showing warm-temperature species, coastal species and offshore species gradually decreased, while warm species and estuaries Growing trend.