【摘要】 根据1981年春(5月)、夏(8月)、秋(11月)、冬(2月)4个航次在黄海南部和东海海域(28°-34°N,127°E以西)的中网标本,研究了中小型桡足类-拟哲水蚤属(ParacalanusGenus)优势种丰度的季节变化和平面分布。本次调查中拟哲水蚤属由小拟哲水蚤(P.parvus)、强额拟哲水蚤(P.crassirostris)、针刺拟哲水蚤(P.aculeatus)和瘦拟哲水蚤(P.gracilis)4个种组成,种群数量皆表现出明显的季节变化。小拟哲水蚤是其中最重要的优势种,其种群数量占拟哲水蚤属的73.92%～86.18%,对浮游动物的总数量变动起着关键作用。拟哲水蚤属总丰度的平面分布特点是:沿岸水域的数量比外海水域高,且皆与表层温度和盐度的变化趋势相反。更多还原

【Abstract】 Based on the samples of medium and small size zooplanktons collected by the National Marine Bureau in May, August, November and February, 1981, standing for spring, summer, autumn, and winter respectively, the seasonal variation of meso small copepods (Paracalanus genus) and its dominant species in the southern Yellow Sea and East China Sea (28°-34°N and the west of 127°E) were studied. Paracalanus Genus was composed of P.parvus, P.crassirostris, P.aculeatus and P.gracilis, in which P. parvus predominated in species, accounting for 73.92%-86.18% of Paracalanus genus and played a main role in the variation of zooplankton abundance. It can be featured that the general abundance in horizontal distribution (ind·m -3 )of Paracalanus genus in coastal waters was higher than that in high sea and showed negatively correlating with the variations of sea surface temperature and salinity in the four seasons.更多还原