夏秋汛浙江渔场浮游动物的种类组成及数量分布

SPECIES COMPOSITION AND QUANTITATIVE DISTRIBUTION OF ZOOPLANKTON IN ZHEJIANG FISHING GROUND DURING THE FISHING SEASONS OF SUMMER AND AUTUMN

本文报道了１９９１—１９９３年夏秋汛浙江渔场浮游动物的调查结果，初步研究了该渔场浮游动物的种类组成及数量分布。结果表明。该海区的主要种类为暖水种，少数为近岸种，暖温带种，共４６种，隶属于２７科３２属。其中水母类１２种，上层鱼饵料生物３４种。主要种类为浮游甲壳类、毛颚类。１９９１—１９９３年，生物量分布不规则。总趋势是：６月—９月，高生物量区北移，调查区北部内侧高于南部。渔汛期间，浮游动物较丰富。１９９１年属丰富年景。１９９２年属中等年景，１９９２年属偏低年景。

This paper deals with the species composition and quantitative distribution of zooplankton in Zhejiang fishing ground during summer and Autumn from 1991to 1993. The results show that in this sea area, the major species are warmwater species and the minor ones are littoral and warm-temperate ones,which summing to 46 species of 32 genus of 27 families including 12 medusa and 34bait organisms of epipelagic fishes, among these planktonic crustaceons and sagitta being in the majority, that the biomass distributes irregularly during the surney years and the high biomass area is tending to move northward on the whole from the months of June to september of the years, which results in higher biomass in the northward than one in the southward, that the zooplankton is abandant during the fishing seasons, and it is regarded as highproduclion year in 1991, middle in 1992, low in 1993.