STUDY ON THE LENGTH-WEIGHT RELATIONSHIP AND RELATIVE CONDITION FACTOR OF Macrobrachium assamensis (TIWARI, 1958) (DECAPODA, PALAEMONIDAE) IN RIVER SONG FROM DOON VALLEY, INDIA

The goal of this study was to look into the length-weight relationship and relative condition factor of Macrobrachium assamensis, a foothill prawn found in the spring-fed Song River in Doon Valley. According to the findings, there is a strong correlation between length and weight, for male fishes b value was 1.2602 while for female it was1.3323. Both sexes had highly significant correlation coefficient values (r=0.8583 for males and 0.9451 for females). The relative condition factor (R.C.F.) for female Macrobrachium assamensis was highest in January (0.976 ±0.071) and lowest in July (0.729 ±0.059). For male prawns, it was also highest in January (0.969 ±0.048) and lowest in July (0.708 ±0.064). The relative condition factor revealed that January was a better feeding season and that the aquatic environment was more suitable.