Morphometric Role on Length-Length and Length Weight Relationship of Sulphur goatfish (Upeneus sulphureus, Cuvier, 1829) From Mandapam Coast, Southern India.

The length to length relationship (LLR) and length weight relationship (LWR) in fishes has a key role in estimation of biomass which is a basic and old age routine for assessment of fisheries. In the present study is engrossed on the morphometric aspects of Upeneus sulphureus from Mandapam coast. Thirty-four morphometric parameters were noted for LLR. All the morphometric parameters were extremely significant with head length and total length at 1 % with p < 0.01 in males but in case of females and juveniles not all the parameters were found to be significant they do have certain limitations in the LLR depending on the sex. The LWR equations are as follows Log W = -0.837 + 2.051 Log L, Log W = -1.544+ 2.712 Log L and Log W = 1.520 - 0.107 Log L in males, females and juveniles. While comparing the slope and elevations in linear regression between males and females was found to be non-significant. From our study it is evident that the LLR had a proficient role in understanding the different aspects with regard to the morphology dissimilarity among the different sexes which is a progressive tool for sex determination.