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

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Relation http://eprints.cmfri.org.in/1848/
http://www.willeyonlinelibrary.com
 
Title Catch composition, reproductive biology and diet of the
bramble shark Echinorhinus brucus (Squaliformes:
Echinorhinidae) from the south-eastern Arabian Sea
 
Creator Akhilesh, K V
Bineesh, K K
White, W T
Rajool Shanis, C P
Manjebrayakath, Hashim
Ganga, U
Pillai, N G K
 
Subject Shark fisheries
 
Description 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 318 cm
total length (LT) and 0·8 to 132 kg 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 187 cm LT. Litter size ranged from 10 to 36 and size at birth was between 42 and 46 cm
LT. Dietary analysis of stomach contents revealed E. brucus feeds on a variety of prey including
crustaceans (69% index of relative importance, I RI), teleosts (25·8% I RI), cephalopods (1·7% I RI)
and elasmobranchs (0·7% I RI). 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.
 
Date 2013
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/1848/1/E.brucus_JFB.pdf
Akhilesh, K V and Bineesh, K K and White, W T and Rajool Shanis, C P and Manjebrayakath, Hashim and Ganga, U and Pillai, N G K (2013) Catch composition, reproductive biology and diet of the bramble shark Echinorhinus brucus (Squaliformes: Echinorhinidae) from the south-eastern Arabian Sea. Journal of Fish Biology, 83 (5). pp. 112-127.