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
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 : 3400 - Downloaded : 2412 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