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Turkish Journal of Fisheries and Aquatic Sciences 2020, Vol 20, Num, 3     (Pages: 235-240)

Annual Variation Characteristics of Chlorophyll a in Typical Sea Cucumber Apostichopus japonicus Culture Ponds

Senhao Jiang 1 ,Boping Tang 1 ,Yichao Ren 2 ,Baoming Ge 1 ,Xinyu Tong 1-3

1 Yancheng Teachers University, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bioagriculture, Ocean and Bioengineering College, Yancheng, P.R. China
2 Qingdao Agricultural University, Marine Science and Engineering College, Qingdao, P.R. China
3 Nanjing Tech University, Biotechnology and Pharmaceutical Engineering College, P.R. China
DOI : 10.4194/1303-2712-v20_3_08 Viewed : 502 - Downloaded : 522 The annual variation features of chlorophyll a in Apostichopus japonicus culture ponds were investigated in this study. CHL-A concentration presented clear seasonal fluctuations in the ponds with annual mean value of 19.60 ± 11.29 μg L–1, in which it showed peaking value in summer time. The contributions of size-fractionated phytoplanktons to CHL-A were ordered as micro > nano > meso–macro > pico. The combined influences of SiO32–-Si, NO2-N, salinity and water temperature on CHL-A concentrations in the ponds were extremely significant (F > F0.01), in which SiO32–-Si concentration was the controller among them. Keywords : Chlorophyll a concentration, Size-fractionated structure, Ecological factor, Sea cucumber, Mariculture pond