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Catch composition, reproductive biology and diet of the bramble shark Echinorhinus brucus (Squaliformes: Echinorhinidae) from the south-eastern Arabian Sea

journal contribution
posted on 2023-05-19, 08:24 authored by Akhilesh, KV, Bineesh, KK, White, WT, Shanis, CPR, Hashim, M, Ganga, U, Pillai, NGK
Fishery and biological data are presented for the poorly known bramble shark Echinorhinus brucus (Squaliformes: Echinorhinidae), from the deep waters of the south-eastern Arabian Sea. A total of 5318 individuals from by-catch landings of deep-water bottom set longlines, gillnets and shrimp trawl fisheries operating at depths of 200-1200m were recorded between January 2008 and December 2011 at the Kochi Fisheries Harbour (Kerala). A total of 431 individuals, from 46 to 318cm total length (LT) and 0·8 to 132kg total mass (MT), were examined to determine biological data for this species. The LT at which 50% were mature (LT50) for females and males was estimated at 189 and 187cm LT. Litter size ranged from 10 to 36 and size at birth was between 42 and 46cm LT. Dietary analysis of stomach contents revealed E. brucus feeds on a variety of prey including crustaceans (69% index of relative importance, IRI), teleosts (25·8% IRI), cephalopods (1·7% IRI) and elasmobranchs (0·7% IRI). This study provides the first detailed biological data for this species and also highlights the extent of the by-catch fishery for this species in Indian waters.


Publication title

Journal of Fish Biology










Institute for Marine and Antarctic Studies


Blackwell Publishing Ltd

Place of publication

9600 Garsington Rd, Oxford, England, Oxon, Ox4 2Dg

Rights statement

2013 The Fisheries Society of the British Isles

Repository Status

  • Restricted

Socio-economic Objectives

Marine biodiversity

Usage metrics

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