Length-Weight relationship and Condition factor of Parluciosoma daniconius (Hamilton) from the upper Assam, India

Length-weight relationship of Parluciosoma daniconius (Ham.) had been carried out from two different waterbodies of upper Assam during 2011-2013. The co-efficient of regression (b) was recorded as 1.104 in juveniles; 1.86 in males; 2.12 in females. The result reveals that females have better growth than males and juvenile. Again, the 'b' value of male was found to be highest (1.348) in 7-8 cm and its lowest (1.087) in 4-5 cm. The highest 'b' value (2.427) of female was recorded in 3-4 cm while the lowest (1.393) in 5-6 cm. Further, the 'b' value of male was found to be highest (1.051) in monsoon while lowest (1.004) in post-monsoon. In female, it was ranged from 1.145 (monsoon) and 1.033 (pre-monsoon). In overall, both the sexes of P. daniconius also did not follow the cube law (b=3) and show allometric growth. The lowest Condition factor 'K' for male (1.010) was recorded in 6-7 cm and highest (1.578) in 3-4 cm while, for female the lowest (1.019) was in 7-8 cm and highest (1.952) in 3-4 cm. Again, the highest 'K' (1.242) was found in post-monsoon and lowest (1.019) in winter for male while, for females 'K' value fluctuated from 1.099 to 1.186 during monsoon and winter. Coefficient of correlation (r) shows more or less similar trend in all length groups as well as in seasons for male and female.