저염도에서 생육가능한 미생물 probiotics가 저염분 양식의 흰다리새우(Litopenaeus vannamei)의 성장 및 면역능에 미치는 영향
Effect of low salinity probiotics on the growth and non-specific immunity of whiteleg shrimp Litopenaeus vannamei cultured under low salinity conditions
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The whiteleg shrimp Litopenaeus vannamei can survive in a wide range of salinity (1-40 psu). However, such variation, particularly at low salinity (1-5 psu), can affect various physiological changes such as survival rates, non-specific immunity and disease resistance. In this study, growth, non-specific immunity and disease resistance were measured following simultaneous oral feeding and addition of probiotic microbes into culture water for 73 day period. The salinity of the culture water was maintained at 3 psu by periodical salt additions. The result shows that survival rate increased significantly (5.6 vs. 15.4%) after 73 day rearing. Significant increases were identified in reactive oxygen species (ROS) production and phenol oxidase (PO) activity. However, superoxide dismutase (SOD) activity was not influenced. When the shrimp was artificially challenged with Vibrio alginolyticus, slight mortality reduction was observed in the probiotics-treated group (100 vs. 79%). In conclusion, the production of cultured whiteleg shrimp at low salinity might be increased by probiotics survivable at low salinity levels.
Abstract
The whiteleg shrimp Litopenaeus vannamei can survive in a wide range of salinity (1-40 psu). However, such variation, particularly at low salinity (1-5 psu), can affect various physiological changes such as survival rates, non-specific immunity and disease resistance. In this study, growth, non-specific immunity and disease resistance were measured following simultaneous oral feeding and addition of probiotic microbes into culture water for 73 day period. The salinity of the culture water was maintained at 3 psu by periodical salt additions. The result shows that survival rate increased significantly (5.6 vs. 15.4%) after 73 day rearing. Significant increases were identified in reactive oxygen species (ROS) production and phenol oxidase (PO) activity. However, superoxide dismutase (SOD) activity was not influenced. When the shrimp was artificially challenged with Vibrio alginolyticus, slight mortality reduction was observed in the probiotics-treated group (100 vs. 79%). In conclusion, the production of cultured whiteleg shrimp at low salinity might be increased by probiotics survivable at low salinity levels.
참고문헌 (28)
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