Effects of temperature, salinity, and light on the growth performance, survival, final biomass, and digestive enzyme activities of juvenile Sipunculus nudus

被引:2
作者
Huang, Jianqiang [1 ,2 ]
Liao, Yongshan [1 ]
Zhong, Ruzhuo [1 ]
Yang, Chuangye [1 ,3 ]
Wang, Qingheng [1 ,3 ,4 ]
Deng, Yuewen [1 ,3 ,4 ,5 ]
机构
[1] Guangdong Ocean Univ, Fisheries Coll, Zhanjiang 524088, Peoples R China
[2] Chinese Acad Trop Agr Sci, Zhanjiang Expt Stn, Zhanjiang 524013, Peoples R China
[3] Guangdong Prov Engn Lab Mariculture Organism Breed, Zhanjiang 524088, Peoples R China
[4] Guangdong Prov Key Lab Aquat Anim Dis Control & Hl, Zhanjiang 524088, Peoples R China
[5] Guangdong Marine Ecol Early Warning & Monitoring L, Zhanjiang 524088, Peoples R China
关键词
Sipunculus nudus; Temperature; Salinity; Light; Growth performance; PURPLE COLOR MORPHS; SEA-CUCUMBER; ENERGY BUDGET; PHYSIOLOGICAL PERFORMANCE; DIETARY-PROTEIN; INTENSITY; WHITE; AQUACULTURE; METABOLISM; SHRIMP;
D O I
10.1016/j.aqrep.2023.101772
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Enhancing the culture technology of Sipunculus nudus by improving the environmental conditions is a crucial means to address its scarcity. This study aimed to evaluate the effects of different environmental factors on the growth performance, survival, final biomass (FB), and digestive enzyme activity of juvenile S. nudus through three separate single-factor culture experiments. The period set for all experiments was 30 days. In the temperature experiment (five groups were set up: 15 degrees C, 20 degrees C, 25 degrees C, 30 degrees C, and 35 degrees C), juvenile S. nudus obtained high growth performance in the water temperature of 25-35 degrees C, but the survival rate (SR) of the 35 degrees C group was significantly lower than those of the 25 degrees C and 30 degrees C groups (P < 0.05). The optimal water temperature for the juvenile was 27.59 degrees C by fitting the regression equation using FB as the evaluation index. In the salinity experiment (five groups were set up: 15 parts per thousand, 20 parts per thousand, 25 parts per thousand, 30 parts per thousand, and 35 parts per thousand), the juvenile S. nudus could obtain high growth performance and lipase activity in the salinity of 15-20 parts per thousand group, but the SR, protease activity, and amylase activity of 15 parts per thousand groups were significantly lower than those of the 20 parts per thousand groups (P < 0.05). By fitting the regression equation using FB as the evaluation index, the best salinity for juveniles was 19.93 parts per thousand. In the light experiment (four groups were set up: natural light, semi-shade, light, and full-shade), the growth performance, FB, and lipase activity of the juveniles in the natural light group were significantly higher than those of the three other groups (P < 0.05), whereas the SR of the full-shade group was significantly lower than those of the three other groups (P < 0.05). This study provides a theoretical basis for exploring the suitable environmental conditions for the culture of S. nudus.
引用
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页数:9
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