A new system for the culture and stock enhancement of sea cucumber,Apostichopus japonicus (Selenka),in cofferdams |
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| Authors: | Libin Zhang Hongsheng Yang Qiang Xu Kun Xing Peng Zhao Chenggang Lin |
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| Affiliation: | 1. Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China;2. Dalian Fisheries University, Dalian, China;3. Chinese Academy of Sciences, Graduate University, Beijing, China;4. College of Marine Life Sciences, Ocean University of China, Qingdao, China |
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| Abstract: | A new multilayer, plate‐type system for the culture and stock enhancement of sea cucumbers in cofferdam was developed. To optimize and evaluate the system, four experimental designs were implemented using polyethylene (PE)‐corrugated sheets of various colours, interval spacing and shapes/styles. Results showed that a system equipped with black PE‐corrugated sheets attracted more animals than either blue, green, transparent or a selection of mixed sheets (six transparent sheets in the upper layer and five black sheets in the lower layer) (P<0.05). Also, more animals gathered in the system with oblique‐angled sheets (30° to the base plate) than either a wavy (the bottom and every second sheet was at an angle of 10° to the base plate) or parallel arrangement (P<0.05), and more animals assembled in the system with 2 cm between sheets than spacings of 3, 4 or 5 cm (P<0.05). As expected, the upper layers of the systems attracted more animals than lower layers in most cases except for those with transparent and mixed oblique‐angled sheets with a 3 cm spacing (P<0.05). Thus, a system with black, oblique‐angled‐corrugated sheets and 2 cm spacing is recommended for Apostichopus japonicus (Selenka) culture and stock enhancement in cofferdams or ponds. |
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| Keywords: | sea cucumber Apostichopus japonicus culture system stock enhancement |
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