Effects of light intensity on growth, digestion and immunity of green, white and purple sea cucumber Apostichopus japonicus Selenka
LI Jing1, LIU Jialiang1, CAO Xuebin1*, WANG Fuchen1, LI Junhua1, ZHENG Longhua1, GUO Zhicheng1, SUN Luping1, LIU Shilin2
1.National Algae and Sea Cucumber Engineering Technique Research Center, Shandong Oriental Ocean Sci-Tech Company Limited, Yantai 264003, China; 2.Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Abstract: White, green and purple sea cucumber Apostichopusjaponicus Selenka with body weight of some 5.3 g were cultured in a water tank at light intensity of 20 000, 1000, 25-50, 5-10 lx and 0 lx(dark, control group)at water temperature of 14-16 ℃ for 90 days to investigate the effects of light intensity on growth, digestion and immunity of the sea cucumber.The results showed that light significantly affected growth rate, and activities of digestive enzymes and immune-related enzymes(P<0.05).The intense light or complete darkness was not conducive to the growth of the sea cucumber, specially the former.There was significantly higher amylase activity in white sea cucumber than that in green and purple sea cucumber at light intensity of 5-10 lx at which the white sea cucumber had the maximal specific growth rate(SGR).The maximal SGR and protease activity were observed in green and purple sea cucumber exposed to light intensity of 25-50 lx, indicating that the protease activity was basically consistent with the growth rate.There was the same effect of light intensity on intestinal acid phosphatase and alkaline phosphatase activities in different colored sea cucumber, the maximal activities in the green and purple sea cucumber under the light intensity of 25-50 lx, and in the white sea cucumber at 5-10 lx, which is consistent with the specific growth rate.The superoxide dismutase(SOD)activity was shown to be different among the three colored sea cucumber, the maximal activity of SOD in dark conditions.The findings indicated that the best growth performance of sea cucumber was found under 5-50 lx light intensity.
李静, 刘佳亮, 曹学彬, 王福辰, 李君华, 郑龙华, 郭治诚, 孙路平, 刘石林. 光照对白刺参、青刺参和紫刺参生长、消化及免疫的影响[J]. 大连海洋大学学报, 2020, 35(2): 184-189.
LI Jing, LIU Jialiang, CAO Xuebin, WANG Fuchen, LI Junhua, ZHENG Longhua, GUO Zhicheng, SUN Luping, LIU Shilin. Effects of light intensity on growth, digestion and immunity of green, white and purple sea cucumber Apostichopus japonicus Selenka. Journal of Dalian Ocean University, 2020, 35(2): 184-189.
2020, Vol. 35 
