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Growth of organism means a change in length or weight or both with increasing age. Age and
growth are closely linked. Scales from, fresh specimens preserved in the freezer were collected from
about the middle flank of the fish just under the dorsal fin and above the lateral line. The scales were
cleaned with cold water and will be observed under a binocular microscope. The number of growth
rings on scales was counted. A total of 22 fishes were collected ranging in length between 26cm to
51cm in total length. The age was recorded 1 to 1+ year in group 1 (20cm to 30cm), 1+ to 2 years
for group 2 (31cm to 40cm), 2, 2+ and 3 years for group 3 (41cm to 50). The age ranges from 1 to 3
years in examined material. The Length weight equations were computed, during the period of
March to May 2014. The sample was ranged between 26 to 51 cm length and 150 to 1600 g weight
of Labeo rohita obtained from the various fishermen. The correlation coefficient was 0.978 and it
was highly significant (p<0.001). This indicated a close relationship between length and weights.
The condition factor (K) was calculated from pooled data for different length groups. The minimum
and maximum values of ‘K’ were observed between 0.85 to 1.34. The average weight 775.82 gm was
noticed. The maximum value of condition factor was observed in the 41.3 cm length and weight 950
gm which may be attributed to the maturity.
Keywords: Scales, Labeo rohita, Condition factor, Correlation coefficient