Feeding dynamics and reproductive biology of the obtuse barracuda Sphyraena obtusata (Cuvier, 1829) from Ratnagiri, central west coast of India


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Authors

  • Shraddha D. Ranaware College of Fisheries, Ratnagiri
  • Vivek H. Nirmale
  • Bhaskar P. Bhosale
  • santosh Y. Metar
  • Prakash E. Shingare

https://doi.org/10.21077/ijf.2023.70.3.131669-04

Keywords:

Sphyraena obtusata, Ratnagiri, Carnivore, Positive allometric growth, GSI, Fecundity

Abstract

The obtuse barracuda Sphyraena obtusata (Cuvier, 1829) is a commercially important food
fish belonging to the family Sphyraenidae and landed mostly as trawl bycatch along Ratnagiri.
Investigations were carried out on the species with respect to the length-weight relationship,
condition factor, morphometrics, feeding and reproductive biology. The length-weight
relationship showed positive allometric growth in males, females and pooled individuals. All
morphometric measurements showed a high degree of correlation with total length. The gut
content analysis revealed S. obtusata to be a carnivore fish feeding mainly on fish juveniles,
fish scales, crustaceans and cephalopod appendages. The male:female sex ratio was found
to be 1:0.90. Gonado-somatic index (GSI), maturity and ova diameter studies indicated that
S. obtusata has a prolonged spawning season with individuals spawning twice in a season.
Absolute fecundity ranged from 68355 to 310615 eggs with an average of 137783 eggs. The
mean length at sexual maturity for females was found to be 22.92 cm.

Keywords:
Carnivorous fish, Fish biology, Life history,
Trophodynamics, Tropical fisheries

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Submitted

2022-12-23

Published

2023-09-30

Issue

Section

Articles

How to Cite

Feeding dynamics and reproductive biology of the obtuse barracuda Sphyraena obtusata (Cuvier, 1829) from Ratnagiri, central west coast of India. (2023). Indian Journal of Fisheries, 70(3). https://doi.org/10.21077/ijf.2023.70.3.131669-04