Now at Solway Marine Investigations, Grove Cottage, Birkby, Maryport, Cumbria CA 15 ORG.
Growth and maturation of roker Raja clavata L. in the Solway Firth
Article first published online: 24 JAN 2006
Journal of Fish Biology
Volume 23, Issue 1, pages 43–48, July 1983
How to Cite
Nottage, A. S. and Perkins, E. J. (1983), Growth and maturation of roker Raja clavata L. in the Solway Firth. Journal of Fish Biology, 23: 43–48. doi: 10.1111/j.1095-8649.1983.tb02880.x
- Issue published online: 24 JAN 2006
- Article first published online: 24 JAN 2006
- (Received 25 May 1982, Accepted 2 September 1982)
Two hundred and seventy-one Raja clavata taken by otter trawl from the Solway Firth were examined for size, sex and state of maturity. Size relationships for both sexes were similar. Total length and disc width were linearly related as were disc width with wing width. Males and females appear to mature at 42 and 45 cm disc width respectively. The Solway population is heavily exploited by an unrestricted commercial fishery and a considerable proportion (48·6%) of the presently retained catch is immature. It is suggested that fishing pressure has brought about a reduction in the size at which female fish mature.