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| Seasonal Environment Changes in Sediments of Sea Cucumber Aquaculture Ponds in Liaodong Bay |
| WANG Bai,CHEN Zhong,GUAN Xiaoyan,JIANG Bei,GAO Shan,JIANG Jingwei,LI Nan,ZHOU Zunchun |
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Abstract The oxygenated (OBP) and unoxygenated (UOP) at bottom ,the temperature ,sulfide content , pH and Eh at three layers (-5~0 cm ,-10~ -5 cm ,-15~ -10 cm) of the sediment were detected in summer ,autumn ,in 2013 ,and winter ,spring in 2014 ,meanwhile the temperature ,salinity ,DO ,pH , Eh of the sea surface and bottom water in the pond were detected to study the seasonal benthic environ‐ment changes of sea cucumber A postichopus j aponicus aquaculture ponds .The temperature ,sulfide con‐tent ,pH and Eh of sediment were compared between the pond without diseases (PO) and pond with disea‐ses (PD) during ice melted period .The results showed that there were significantly change in values of pH ,and reducibile oxidation‐reduction potential ,and in sulfide content in different layers in different sea‐sons in the sediments in both OBP and UOP .The sulfide content of the OBP sediment were significant lower than that in the UOP at the different seasons .There was correlationship between the oxidation‐re‐duction environment of sediment and the physic‐chemical environment of bottom sea water .Compared to the PO ,the pH of PD sediment was weakly acidic ,the oxidation‐reductionenvironment of the PD sediment was weak reduction features ,and the sulfide content of the PD sediment was significantly higher during ice melted period .T he findings provide basic data for ecological health cultivation and scientific management of sea cucumber aquaculture .
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Received: 25 June 2016
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