EFFECTIVENESS OF DIFFERENT ADDITIONAL FEEDINGS ON THE GROWTH AND SURVIVAL OF MAHSEER (Tor tambra) FISH FROM THE ALAS RIVER

Abstract

Mahseer (Tor tambra) is a high-value freshwater fish species that is highly favored by both local and international markets. Its popularity is attributed to its thick flesh, distinctive taste, high oil content, and premium market value. This study aimed to evaluate the effects of different supplementary feeds on the growth performance and survival rate of mahseer originating from Alas River. The experiment employed a Completely Randomized Design (CRD) consisting of four treatments with three replicates each. The treatments included P1 (commercial pellet feed), P2 (commercial pellet feed spplemented with coconut meal), P3 (commercial pellet feed supplemented with sweet potato), P4 (commercial pellet feed supplemented with figs). The results demonstrated that P4 produced the best growth performance, with an absolute weight gain of 0.84 g, an absolute length gain of 0.99 cm, and a specific daily growth rate of 0.69%. the most efficient feed conversion ratio was also observed in P4, with a value of 1.90. Meanwhile, the highest survival rate was recorded in P1 and P3, both achieving 100% survival. Throughout the rearing period, water quality parameters remained within suitable ranges for fish culture, with temperature ranging from 24.3-26.5^oC, pH from 7.6 to 7.9, dissolved oxygen (DO) from 4.0 to 4.4 mg/L, and ammonia concentrations ranging from 0.11 to 0.66 mg/L.