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Recent studies on the crawfish Palinurus elephas in South Wales and Cornwall

Published online by Cambridge University Press:  11 May 2009

E. Hunter ,
S. E. Shackley  and
D. B. Bennett
E. Hunter
Affiliation:
School of Biological Sciences, University of Wales, Swansea, Singleton Park, Swansea, SA2 8PP.
S. E. Shackley
Affiliation:
School of Biological Sciences, University of Wales, Swansea, Singleton Park, Swansea, SA2 8PP.
D. B. Bennett
Affiliation:
MAFF Fisheries Laboratory, Pakefield Road, Lowestoft, Suffolk, NR33 OHT.
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Extract

From May 1993 until January 1994, 788 male and 1604 female crawfish, Palinurus elephas in total, were examined from the South Wales and Cornish fisheries. Mean carapace length (CL) of Cornish crawfish was 125.6 mm for males, 132.4 mm for females and 135.0 mm for berried females, while mean CL for Welsh crawfish was 155.8 mm for males, 138.7 mm for females and 138.6 mm for berried females. The overall size distribution of male Welsh crawfish differed significantly from that observed in the Cornish population. An analysis of variance gave significant (P<0.05) differences for the factors; Site, Sex and the Sex/Site and Month/Sex interactions. Male crawfish reached greater overall size than female crawfish, but for specimens of equal CL, total lengths (TL) of females were longer than those of males. Males were heavier than females of equal CL or TL.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 76 , Issue 4 , November 1996 , pp. 963 - 983
Copyright
Copyright © Marine Biological Association of the United Kingdom 1996

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