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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
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 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 zooplank ton depends on the