Length-based population dynamics of the near threatened shark Scoliodon laticaudus Muller andHenle, 1838 from north-eastern Arabian Sea, India

Y. Gladston; K. V. Akhilesh; S. M. Ajina; S. K. Chakraborty; A. K. Jaiswar; Latha Shenoy

doi:10.21077/ijf.2025.72.2.155057-04

Authors

Y. Gladston Scientist
K. V. Akhilesh Senior Scientist
S. M. Ajina Scientist
S. K. Chakraborty Principal scientist
A. K. Jaiswar Principal scientist
Latha Shenoy Principal scientist

https://doi.org/10.21077/ijf.2025.72.2.155057-04

Keywords:

Length-based population dynamics, S. laticaudus, North eastern arabian sea

Abstract

Spadenose shark Scoliodon laticaudus is a common shark species landed as a bycatch from various gears used in the north-eastern Arabian Sea, India. Length-based stock assessment was done for S. laticaudus landed from trawl nets operated from New Ferry Wharf and Versova and trawled at 20-50 m depths from August 2016 to May 2018. Altogether 2237 specimens of S. laticaudus were sampled for the study, of which males contributed 46.80% (n= 1047) and females 53.20% (1190) with a sex ratio of 1:1.3. Length range observed was 170 to 590 mm for males and 163 to 610 mm for females. S. laticaudus has a relatively faster growth rate with a K value of 0.64 yr-1, t0 of -0.364 yr and an asymptotic length (L∞) of 674 mm.

Keywords: Carcharhinid sharks, Exploitation, Maharashtra, Spadenose shark, Stock assessment

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