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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on May 29, 2008
ICES Journal of Marine Science: Journal du Conseil 2008 65(6):979-981; doi:10.1093/icesjms/fsn080
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Crown Copyright © 2008. Published by Oxford Journals on behalf of the International Council for the Exploration of the Sea. All rights reserved

Fecundity of Northeast Atlantic spurdog (Squalus acanthias)

Jim R. Ellis and Jennie Keable

Cefas Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK

Correspondence to J. R. Ellis: tel: +44 1502 524300; fax: +44 1502 513865; e-mail: jim.ellis{at}cefas.co.uk

Ellis, J. R., and Keable, J. 2008. Fecundity of Northeast Atlantic spurdog (Squalus acanthias). – ICES Journal of Marine Science, 65: 979–981.

A large catch of mature, female spurdog (Squalus acanthias) was made on 22 November 2005 in the Irish Sea. Examination of a subsample of 202 of these fish (82–117-cm total length, L) indicated that 28% were carrying near-term pups, 70% year one pups, and 1% candles. Uterine fecundity (F) for those fish that were not considered to have aborted pups (n = 179) ranged from 3 to 21 and increased with total length, where F = 0.428 L–31.87. The upper limits of these fecundity estimates are the highest recorded for spurdog in the Northeast Atlantic. These data are discussed in relation to previously published fecundity estimates and the possibility of a density-dependent increase in fecundity.

Keywords: Irish Sea, reproductive biology, spiny dogfish, Squalidae

Received 29 January 2008; accepted 17 April 2008; advance access publication 29 May 2008.


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