| XU Zhaoli,CHAO Min,CHEN Yaqu. 2004. Distribution characteristics of zooplankton biomass in the East China Sea. Acta Oceanologica Sinica, (2):337－346 |
| Distribution characteristics of zooplankton biomass in the East China Sea |
| Distribution characteristics of zooplankton biomass in the East China Sea |
| Received:October 11, 2003 Revised:March 06, 2004 |
| DOI： |
| Key words:zooplankton total biomass diet biomass East China Sea fishing ground of Engraulis japonicus |
| 中文关键词: zooplankton total biomass diet biomass East China Sea fishing ground of Engraulis japonicus |
| 基金项目: |
| Author Name | Affiliation | E-mail | | XU Zhaoli | East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China
Key and Open Laboratory of Marine and Estuarine Fisheries of Ministry of Agriculture of China, Shanghai 200090, China | xiaomin@public4.sta.net.cn | | CHAO Min | East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China
Key and Open Laboratory of Marine and Estuarine Fisheries of Ministry of Agriculture of China, Shanghai 200090, China | | | CHEN Yaqu | East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai 200090, China
Key and Open Laboratory of Marine and Estuarine Fisheries of Ministry of Agriculture of China, Shanghai 200090, China | |
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| Abstract: |
| 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/m3 in four seasons, autumn (86.18 mg/m3) being greater than summer (69.18 mg/m3) greater than spring (55.67 mg/m3) greater than winter (50.33 mg/m3). The average value of diet zooplankton biomass is 40.9 mg/m3. 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/m3) 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/m3)area of diet zooplankton in the middle-southern part of East China Sea or the edge of its waters. |
| 中文摘要: |
| 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/m3 in four seasons, autumn (86.18 mg/m3) being greater than summer (69.18 mg/m3) greater than spring (55.67 mg/m3) greater than winter (50.33 mg/m3). The average value of diet zooplankton biomass is 40.9 mg/m3. 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/m3) 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/m3)area of diet zooplankton in the middle-southern part of East China Sea or the edge of its waters. |
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