Pacific oysters crassostrea gigas (Thunberg) of possible French origin in natural spat in the British Isles
Article first published online: 29 JUN 2006
Copyright © 1995 John Wiley & Sons, Ltd
Aquatic Conservation: Marine and Freshwater Ecosystems
Volume 5, Issue 3, pages 173–177, September 1995
How to Cite
Child, A. R., Papageorgiou, P. and Beaumont, A. R. (1995), Pacific oysters crassostrea gigas (Thunberg) of possible French origin in natural spat in the British Isles. Aquatic Conserv: Mar. Freshw. Ecosyst., 5: 173–177. doi: 10.1002/aqc.3270050302
- Issue published online: 29 JUN 2006
- Article first published online: 29 JUN 2006
- Manuscript Revised: 25 JUL 1995
- Manuscript Received: 22 MAY 1995
- 1Hatchery-reared Pacific oysters (Crassostrea gigas) grown in the British Isles and Guernsey originate from an introduction through quarantine of small numbers of oysters from British Columbia, Canada.
- 2Previous electrophoretic analysis of samples of these oysters have shown the glucose phosphate isomerase locus to be monomorphic.
- 3Recent analysis of oysters from a commercial hatchery in Guernsey revealed a second allele at low frequencies which was unexpected and was thought to indicate the presence of oysters from another stock.
- 4Samples of hatchery-reared oysters from France showed that they were highly polymorphic and carried the unexpected allele and four others.
- 5A natural spatfall of oysters from the River Teign (Devon) was sampled and these carried three alleles which were also found in the French C. gigas. This suggests that there has been movement of C. gigas possibly of French origin into this river.
- 6This finding and its implications in terms of conservation and management are discussed.