Influence of salinity on the growth and body composition of juvenile Tiger Shrimp, Penaeus monodon

Varghese, Binu and Laxminarayana, A and Daniel, S D (2020) Influence of salinity on the growth and body composition of juvenile Tiger Shrimp, Penaeus monodon. Journal of Aquatic Biology and Fisheries, 8. pp. 47-51. ISSN 2321–340X

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Abstract

Giant tiger prawn dominated the global shrimp aquaculture industry before giving way to Pacific white shrimp in the early 21st century. This study evaluated the influence of salinity on the survival, growth and body composition of early juveniles. They were exposed to salinities ranging from freshwater (0‰) to marine (35‰) under ambient rearing conditions. Response parameters like survival, growth and body compositions were tested over the salinity range of 0, 10, 20, 30, and 35 ‰. The survival obtained was above 95% except in freshwater, wherein total mortality was observed by the third week of rearing. Growth was found to vary with salinity significantly and was found to be higher at 20‰ with an SGR of 7.31. Apart from its role in survival and growth, salinity was found to influence body composition. It was observed that body protein and carbohydrate content showed significant variations with the salinity. The body protein content was high at 20 ‰ with 14.45 mg/100mg wet weight, and carbohydrate of 1.01mg/ 100mg at 30 ‰. However, variations in lipid, ash, and moisture content did not have any significant difference. Though found insignificant, the lipid content was higher (2.15 mg/100mg) at lower salinity of10‰. The present study provides insights into the possible impact of rearing environment on the physiological and biochemical changes in this species.

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