Demographics of a heavily exploited deep water shark Echinorhinus cf. brucus (Bonnaterre, 1788) from the south-eastern Arabian Sea


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Authors

  • K.V Akhilesh Central Marine Fisheries Research Institute
  • C. Anulekshmi Central Marine Fisheries Research Institute
  • K.K. Bineesh Andaman and Nicobar Regional Centre, Zoological Survey of India (ZSI), Andamans, India
  • U. Ganga Central Marine Fisheries Research Institute
  • N. G. K. Pillai

https://doi.org/10.21077/ijf.2019.67.1.92453-02

Abstract

In the absence of direct consumption importance and considering as low value bycatch, many vulnerable non-target species, especially slow growing deep water fauna, are overlooked in tropical fisheries research and management. The bramble shark Echinorhinus cf. brucus (Bonnaterre, 1788) is one such species, subjected to a significant non-targeted deep water fishery off southern India. A length frequency based stock assessment of bramble shark caught in trawl fisheries from the south-eastern Arabian Sea suggests that, E. cf. brucus is a moderately slow growing (K=0.12 year-1) and moderately long lived shark species (Tmax = 25 years, L¥= 333 at corresponding age of 55 years) which is overexploited (M=0.17, Z=0.39) in the region. In view of resilience capacity and vulnerability of deep sea fisheries, improved research and monitoring programmes are urgently required to ensure a sustainable future for India’s expanding deep-sea and distant water fisheries.

Keywords: Bycatch, Deep sea, Indian Ocean, India, Population dynamics, Shark fishery, Sustainability 

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Submitted

2019-08-06

Published

2020-03-31

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Articles

How to Cite

Akhilesh, K., Anulekshmi, C., Bineesh, K., Ganga, U., & Pillai, N. G. K. (2020). Demographics of a heavily exploited deep water shark Echinorhinus cf. brucus (Bonnaterre, 1788) from the south-eastern Arabian Sea. Indian Journal of Fisheries, 67(1). https://doi.org/10.21077/ijf.2019.67.1.92453-02