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Distribution characteristics of zooplankton biomass in the East China Sea

文献类型： 外文期刊

作者： Xu, ZL 1 ; Chao, M 2 ; Chen, YQ 2 ;

作者机构： 1.Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China

2.Chinese Acad Fisheries Sci, E China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China; Minist Agr, Key & Open Lab Marine & Estuarine Fisheries, Shanghai 200090, Peoples R China

关键词： zooplankton;total biomass;diet biomass;east china sea;fishing ground of engraulis japonicus

期刊名称：ACTA OCEANOLOGICA SINICA （ 影响因子：1.431； 五年影响因子：1.445 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： On the basis of the data of oceanographic survey in the East China Sea in four seasons during 1997～2000 (23°30'～33°00'N, 118°30'～128°E), the variation of total biomass and diet biomass of zooplankton and their spatial-temporal distribution and relationship with the fishing ground of Engraulis japonicus are approached and analyzed. The results show that the average biomass is 65.32 mg/m~3 in four seasons, autumn (86.18 mg/m~3) being greater than summer (69.18 mg/m~3) greater than spring (55.67 mg/m~3) greater than winter (50.33 mg/m~3). The average value of diet zooplankton biomass is 40.9 mg/m~3. The trends of horizontal distribution both in the total biomass and the diet biomass of zooplankton are similar. The high biomass region (250～500 mg/m~3) is very limited, only accounting for 1% of the investigation area. Seasonal variation of the biomass is very remarkable in the west and north parts of East China Sea coastal waters ( 29°30'N,125°E). The horizontal distribution of diet zooplankton depends on the abundance distribution of crustacean. The distribution of diet zooplankton is related to the fishing ground of Engraulis japonicus and the high-density area of young fish and larval. In spring, the central fishing ground of Engraulis japonicus (>100 kg/h) and the high-density area of young fish and larval (>100 individuals per net) are located at the same place of high-density (100～250 mg/m~3)area of diet zooplankton in the middle-southern part of East China Sea or the edge of its waters.

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