Interaction Effects of Temperature and Salinity on Survival and Growth of Juvenile Scallop “Bohai Red”
ZHANG Yuan1,2, ZHU Zhanhao1, YAO Gaoyou1, SU Xiaoying1,2, LIU Xiaokun1 , LIUFU Shaomei3, FANG Jiaxi4, CHEN Nansheng5, WANG Chunde6, LIU Zhigang1,2
1. College of Fisheries, Guangdong Ocean University, Zhanjiang 524088, China; 2. Guangdong Engineering Research Center of Healthy Breeding for Economic Invertebrates in the South China Sea, Zhanjiang 524088, China; 3. Zhanjiang Silverwave Marine Biotechnology Co., Ltd., Zhanjiang 524022, China; 4. Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong 999077, China; 5. Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby V5A 1S6, Canada; 6. College of Marine Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
Abstract：The central composite experimental design and response surface analysis were used to study the combined effect of temperature (16—28 ℃) and salinity (22—34) on survival and growth of juvenile scallop “Bohai Red”. The results showed that the linear and quadratic effects of temperature and quadratic effects of salinity on juvenile survival rate, and the growth rates of shell length and body weight were very significant (P<0.01). The liner effects of salinity, the interaction effect of temperature and salinity on juvenile survival rate were significant (P<0.05), without significant on the growth rates of shell length and body weight of juveniles (P>0.05). By response surface analysis, a model equation was established for the relationship of juvenile survival rate, the growth rates of shell length and body weight to the two factors, with r2 of 0.9696, 0.9969 and 0.9966, correlation coefficients of 0.9391, 0.9938 and 0.9932 and prediction coefficients of 0.7622, 0.9726 and 0.9662, respectively. The three models had a good fit, which was used to predict the survival rate, the growth rates of shell length and body weight of juveniles of scallop "Bohai Red". After software optimization, the suitable model under the combined influence of temperature and salinity was obtained. The best results of the growth rates of shell length and body weight were observed temperature of 22.65 ℃, and salinity of 28.51, with survival rate of 95.33%, and the shell length growth rate of 197.50 μm/d, the body weight growth rate of 21.58 mg/d and reliability of 0.975.
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2022, Vol. 41 
