Length-weight relation of three species of goatfish from the south-east

Vishnupriya, K M and Nair, Rekha J and Sangeetha, A T (2024) Length-weight relation of three species of goatfish from the south-east. Journal of the Marine Biological Association of India, 66 (1). pp. 103-109. ISSN 2321-7398

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Abstract

Length-weight relationship (LWR) of Upeneus guttatus (Day 1868),Upeneus sulphureus (Cuvier, 1829) and Parupeneus heptacanthus (Lacepède, 1802) was assessed from the Southwest coast of India for a study period November 2020 to August 2021. The total length of U. guttatus varied from 86 to 197 mm, and wet weight ranged from 5 to 78.5 g. Regression coefficient b for male, female, and pooled U. guttatus was found to be 3.100, 3.144, and 3.376 respectively and coefficient of determination (r 2 ) was estimated to be 0.954 (male); 0.967 (female); 0.953 (pooled). The b value of U. sulphureus was found to be 3.14 andr 2 = 0.943 (pooled) and the total length varied from 112-181mm; wet weight: 18.2 to 87.5g. The b value of P. heptacanthus was found to be 3.135 and r 2 = 0.976 (pooled) and body length varied from 133-227 mm; wet weight: 29 to 179 g. A positive allometric growth factor was observed for all species. Mathematical models such as length-weight relationships help describe the growth parameters of fish at various time intervals. This study throws light on the LWRs of three species of goatfish available in Indian waters.

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