The effect of rearing media salinity on survival, growth, and blood glucose of juvenile mahseer (Tor soro)

Abstract

Optimization of Mahseer (Tor soro) rearing water media supports seed mass production. This study aims to obtain optimal salinity for production performance in rearing Tor soro. The research was conducted at the Wet Laboratory of the Research Institute for Freshwater Aquaculture and Fisheries Extension Bogor. The test fish was Tor soro with 1-2 cm in body length. Experimental design using completely randomized design with four treatments of salinity: 0, 2, 4, and 6 ppt and three replications each. Twelve aquarium glasses with a volume of 50 L each as experiment containers and stocking density was one fish/L. Tubifex worms were fed at satiation, fish were reared within 40 days. The observed parameters were survival rate, absolute growth and length, specific weight growth rate, blood glucose level, and osmolarity. Data analysis using ANOVA test and Duncan for post hoc test. Water quality parameters, blood glucose, and osmolarity were analyzed descriptively. The results showed that two ppt of media salinity is optimal for the rearing of Tor soro to obtain the maximum of production performance (survival rate, absolute growth, and length, specific growth rate) and the best condition for blood glucose and level osmotic work.