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根据2008年6月在吕泗渔场(31.90°N-32.10°N、121.70°E-121.95°E)海域生态环境调查资料,分析了该区饵料浮游动物种类分布、优势种、数量分布、多样性等特征。结果表明:该区共出现饵料浮游动物31种(不含浮游幼体和腔肠动物),种类数和丰度均以桡足类占据优势;该区总生物量均值为845.54mg.m-3,其中大潮时为895.58mg.m-3,分布趋势为北部高于南部,小潮时为795.49mg.m-3,分布趋势为中部较高;6月吕泗渔场饵料浮游动物优势种分别是真刺唇角水蚤(Labidocera euchaeta)、中华哲水蚤(Calanus sini-cus)、小拟哲水蚤(Paracalanus parvus)、太平洋纺锤水蚤(Acartia pacifica)、火腿许水蚤(Schmackeria poplesia)、长轴螺(Peraclis reticulata)、长额刺糠虾(Acanthomysis longirostris);大潮时真刺唇角水蚤和中华哲水蚤优势度最高均为0.19,小潮时真刺唇角水蚤优势度最高为0.40;在吕泗渔场,6月饵料浮游动物生物量较高,优势种数较多,反映出该渔场小黄鱼饵料环境的稳定性,为小黄鱼幼体生长提供了良好的饵料条件。
According to the survey data of ecological environment in the fishery area of Lusi (31.90 ° N-32.10 ° N, 121.70 ° E-121.95 ° E) in June 2008, the species distribution, dominant species, quantity distribution and diversity of zooplankton And so on. The results showed that there were 31 species of zooplankton (excluding plankton and coelenterate) in the area, and the number and abundance of species occupied the advantage of copepods. The total biomass of this area was 845.54 mg.m-3, Among them, the tide was 895.58mg.m-3, the distribution trend was higher in the north than in the south and 795.49mg.m-3 in the low tide, and the distribution trend was higher in the middle. In June, dominant species of bait zooplankton Labidocera euchaeta, Calanus sini-cus, Paracalanus parvus, Acartia pacifica, Schmackeria poplesia, Peraclis reticulata and Acanthomysis longirostris. The maximum dominance of Daphniphyllum dabryanus and Cyperus chinensis in tidewater was 0.19 and the dominance of Daphnia magna was 0.40 in low tide; In Lu Si fisheries, the biomass of zooplankton in June was higher, and the dominant species were more, which reflected the stability of the food environment of small yellow croaker and provided good feed conditions for the growth of small yellow croaker.