Corophium sextonae

Phylum: Crustacea
Class: Eumalacostraca
Order: Amphipoda
Species name: Corophium sextonae Crawford 1937
Synonyms: None
Common name: None
Date of introduction and origin
Corophium sextonae was first introduced into Plymouth, Devon, in the 1930s (Crawford 1937) from New Zealand (Hurley 1954). A secondary introduction to Ireland occurred by the late 1970s or early 1980s (Costello 1993). This species naturally occurs in New Zealand.
Method of introduction
Reasons for success
Rate of spread and methods involved
Details of its spread are unknown, but there was possible natural spread from UK to Ireland (M. Costello pers. comm.).
It is found in the southern and western British Isles (Moore 1978), north to Scotland. Its distribution elsewhere in Europe is not clear, however, it is found in Ireland (Costello et al. 1989; Costello & Kelly 1991).
Factors likely to influence spread and distribution
These are unknown, but possibly temperature is important.
Effects on the environment
It has apparently negligible effects, although Spooner (1951) considered that its increase in abundance in the Plymouth area was linked to a decrease in abundance of the native Corophium bonnellii (not used for other sp.).
Effects on commercial interests
Control methods used and effectiveness
None used.
Beneficial effects
None known.
Costello, M.J. 1993. Biogeography of alien amphipods occurring in Ireland, and interactions with native species. In: Proceedings of the First European Crustacean Conference, 1992. Crustaceana, 65: 287-299.
Costello, M.J., Holmes, J.M.C., McGrath, D., & Myers, A.A. 1989. A review and catalogue of the Amphipoda (Crustacea) in Ireland. Irish Fisheries Investigations, Series B (Marine), 33: 1-70.
Costello, M.J., & Kelly, K.S., eds. 1993. Biogeography of Ireland: past, present and future. Dublin, Irish Biogeographical Society. (Occasional Publication, No. 2.)
Costello, M.J., Kelly, K.S. 1991. The biogeographic richness of the Amphipoda. In: The Ecology of Lough Hyne: proceedings of a conference 4-5 September 1990, ed. by A.A. Myers, C. Little., M.J Costello & J.C. Partridge, 157-162. Dublin, Royal Irish Academy.
Crawford, G.I. 1937. A review of the amphipod genus Corophium, with notes on the British species. Journal of the Marine Biological Association of the United Kingdom 21: 589-630.
Hayward, P.J., & Ryland, J.S. eds. 1990. The marine fauna of the British Isles and north-west Europe. 2 vols. Oxford, Clarendon Press.
Hurley, D.E. 1954. Studies on the New Zealand amphipod fauna. No 7. The family Corophiidae, including a new species of Paracorophium. Transactions of the Royal Society of New Zealand, 82: 431-460.
Moore, P.G. 1978. Turbidity and kelp holdfast Amphipoda. I. Wales and southwest England. Journal of Experimental Marine Biology and Ecology, 32: 53-96.
Spooner, G.M. 1951. Amphipoda. In: Plymouth marine fauna, 3rd ed.. 207-234. Plymouth, Marine Biological Association.
Acknowledgements (contributions from questionnaire)
Dr M.J. Costello, University of Dublin.