Evaluation of Whiteleg Shrimp (Litopenaeus vannamei)Growth and Survival in Three Salinities under RAS Conditions

whiteleg shrimp;RAS conditions;salinity;Natural Resources and Environment

Sakas, AlexisLow, Bobbi ;

University of Michigan

关键词: whiteleg shrimp;    RAS conditions;    salinity;    Natural Resources and Environment;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/123043/AlexisSakas_Thesis.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Aquaculture provides our rising global population a multitude of social, economic, and ecological benefits. A large component of the yields is whiteleg shrimp (Litopenaeus vannamei), which has expanded to over three million tons annual global production. As whiteleg shrimp tolerate a wide range of salinities, a potential method to reduce impacts is freshwater inland culture, which would decrease operational and environmental costs. This study aimed to evaluate the effectiveness of such a proposal via a long-term analysis of shrimp growth and survival in freshwater, compared to brackish or saltwater (0, 12, and 35 ppt, respectively) over a 107 day period. Based on findings of previous studies, I hypothesized equal shrimp growth and survival among treatments. Growth, survival, and biomass results in freshwater were poor compared to higher salinities (0.063 g/wk compared to 0.62 and 0.091 g/wk growth, 1% versus 63 and 72% survival, and 2 g versus 307 and 1747 g final biomass, respectively). This study confirmed that many factors are vital to the successful culture of whiteleg shrimp. Multiple regression demonstrated that water quality variables (salinity, alkalinity, dissolved oxygen (DO), and pH) were significantly correlated with dependent variables (shrimp growth, survival, and biomass) to varying degrees. Growth was negatively associated with salinity and pH, and positively associated with alkalinity and DO. Survival was positively associated with alkalinity and pH, and negatively with ammonia, while biomass had a significant positive association with DO. Growth was the sole dependent variable with a significant association with salinity. Growing shrimp was most effective in brackish water under the conditions of the present experiment, but continued research on identifying drivers of this limitation are worthwhile in order to make the valuable shrimp farming industry as sustainable as possible.