LENGTH- WEIGHT RELATIONSHIP (LWR) AND CONDITION FACTOR OF Amblyceps apangi NATH & DEY FROM ARUNACHAL PRADESH, INDIA

Abstract

Length-weight relationship of Amblyceps apangi had been carried out from streams of Dikrong River Arunachal Pradesh, during January 2014 to December 2015 . The co-efficient of regression (b) was recorded as 2.213 (males); 2.376 (females); 2.312 in pooled (both sexes). The result reveals that females have better growth than males and both sexes signify a negative allometric growth pattern . The highest Condition factor ‘K’ value (0.82 ±0.24) for male was found in November and minimum (0.45 ± 0.12) was observed in July. In case of female, the highest value (0.95 ± 0.11) was recorded in November and lowest (0.50 ± 0.09) was noticed in June. Again, the highest K values (0.83 ± 0.16) of male was found in 61-70 mm while in females the highest (0.86 ± 0.13) was in 51-60 mm. The lowest values for both male (0.38 ± 0.07) and female (0.36 ± 0.03) were observed in 141-150 mm. The Relative Condition factor (Kn) value did not show any variation with respect to monthly and size grouping. The result indicates that both the sex was found in a good condition. Moreover, the K values were encountered with GSI values during the quiescent and degenerative phases of the reproductive cycle but minimum K values coincides with the increased GSI during the recrudescent phases both the sexes. Coefficient of correlation (r) shows more or less similar trend in all male, female and pooled. The correlation coefficient ‘r’ was found to be 0.906 (males); 0.949 (females) and 0.934 (pooled). This result indicates that there was a good correlation between length and weight of the fish.