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

Abstract

Length-weight relationship of Amblyceps apangi hadbeen carried out from streams of Dikrong River Aruna-chal 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 thanmales and both sexes signify a negative allometricgrowth pattern. The highest Condition factor ‘K’ value(0.82 ±0.24) for male was found in November and min-imum (0.45 ± 0.12) was observed in July. In case offemale, the highest value (0.95 ± 0.11) was recorded inNovember and lowest (0.50 ± 0.09) was noticed inJune. Again, the highest K values (0.83 ± 0.16) of malewas found in 61-70 mm while in females the highest(0.86 ± 0.13) was in 51-60 mm. The lowest values forboth male (0.38 ± 0.07) and female (0.36 ± 0.03) wereobserved in 141-150 mm. The Relative Condition fac-tor (Kn) value did not show any variation with respectto monthly and size grouping. The result indicates thatboth the sex was found in a good condition. Moreover,the K values were encountered with GSI values duringthe quiescent and degenerative phases of the reproduc-tive cycle but minimum K values coincides with the in-creased GSI during the recrudescent phases both thesexes. Coefficient of correlation (r) shows more or lesssimilar trend in all male, female and pooled. The corre-lation coefficient ‘r’ was found to be 0.906 (males);0.949 (females) and 0.934 (pooled). This result indi-cates that there was a good correlation between lengthand weight of the fish.