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Biological observations on the bristly catshark Bythaelurus hispidus from deep waters off the south‐west coast of India
Author(s) -
Akhilesh K. V.,
White W. T.,
Bineesh K. K.,
Ganga U.,
Pillai N. G. K.
Publication year - 2013
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.12087
Subject(s) - biology , shrimp , fishery , predation , chondrichthyes , crustacean , fish <actinopterygii> , zoology , ecology
Biological data are presented for the poorly known bristly catshark Bythaelurus hispidus based on specimens collected from the by‐catch of the commercial deep‐sea shrimp trawl fishery operating in the Arabian Sea at depths of 200–500 m off the south‐west coast of India. One hundred and sixty‐two individuals, which ranged from 120 to 366 mm total length ( L T ), were collected for this study. Size‐at‐maturity ( L 50 ) for females and males was estimated at 252 and 235 mm L T , respectively. The reproductive mode of B. hispidus was aplacental viviparity, which is the rarest reproductive mode within the Scyliorhinidae and is considered to be the most advanced of the three reproductive modes occurring within this family. Dietary analysis of stomach contents revealed B. hispidus feeds on a variety of prey, primarily fishes.