AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Calyptraea chinensis | |
Date of the first record (?) | 1949 - 1956 References: Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Southern R (1915) Clare Island Survey, Part 67. Marine Ecology. Prceedings of the Royal Irish Academy 31: 1-10. Comments: First recognised in Ireland by CB Duggan in an oyster survey in January 1963. Its appearance is thought to be related to the import of oysters from Brittany over the period 1949-1956. Earlier detailed surveys in Ballynakill and Clew bays did not reveal this snail (Southern, 1915). |
Recipient region (?) | Country: Ireland LME: 24. Celtic-Biscay Shelf LME sub-region: Celtic seas References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Colgan N (l9ll) Marine mollusca. Clare Island Survey. Part 22 Proceedings of the Royal Irish Academy 3l: l-36. Minchin D, Nunn J (2006) Further range extensions of the marine gastropod Calyptraea chinensis (L.) in Ireland. Irish Naturalists’ Journal. 28 (5): 200-203. Comments: The first record was from Clew Bay in the region where oyster layings from Brittany had taken place. The area had been extensively surveyed in the early 1900s and this species was not known to occur at that time. The species has now extended its range to Ballinakill Harbour, Cork Harbour, Galway Bay and Strangford Lough. |
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Source region (?) | Country: France --> LME: 24. Celtic-Biscay Shelf; LME sub-region: Biscay Gulf References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Comments: The consignments of half-grown Ostrea edulis imported from Brittany is the most likely source of the Clew Bay population. |
Pathway / Vector (?) | Level of certainty: Highly likely Pathway: Culture activities Vector: (Highly likely) Regional stock movement References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Minchin D, Nunn J (2006) Further range extensions of the marine gastropod Calyptraea chinensis (L.) in Ireland. Irish Naturalists’ Journal. 28 (5): 200-203. Comments: Transport with oyster stock is the most likely explanation. The species is often associated with attachment to the shells of bivalves. |
Habitat type (?) | Aquaculture sites Estuary Marine Protected Area (MPA) Sheltered coastal area Strait/Sound References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Minchin D, Nunn J (2006) Further range extensions of the marine gastropod Calyptraea chinensis (L.) in Ireland. Irish Naturalists’ Journal. 28 (5): 200-203. |
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Wave exposure (?) | Sheltered Comments: All of the localities where the species has been recorded inshore have been in sheltered localities |
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Salinity range (?) | Venice system: 6. Polymixohaline [18-30psu] 7. Euhaline [30-40psu] Comments: While the salinities have not been measured where the species occurs it is currently found in coastal waters where salinities might dip below to the upper levels of polymixohaline on occasion. |
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Temperature range (?) | Not entered |
Zonation / Substratum (?) | Benthic: Littoral (Benthic) Sublittoral beyond photic zone Sublittoral within photic zone Substratum: Biogenic (living or nonliving) Hard (cobbles to bedrock) Soft (mud to pebbles) References (not structured): Minchin D, McGrath D and Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Comments: all recent inshore records relate to past or present or adjacent sites to where imported or transferred oysters have been laid. |
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Reproductive duration (?) | Unknown References (not structured): Minchin D, Nunn J (2013) Rapid assessment of marinas for invasive alien species in Northern Ireland. A report undertaken for the Northern Ireland Environment Agency, Belfast. 96pp. Comments: Not studied but brood have been noted during August in Strangford Lough. The species does not have a free swimming larval stage, the young are released as crawlers. | |
Reproductive seasonality (?) | Not entered | |
Migration pattern (?) | Not relevant References (not structured): Minchin D, Nunn J (2013) Rapid assessment of marinas for invasive alien species in Northern Ireland. A report undertaken for the Northern Ireland Environment Agency, Belfast. 96pp. Comments: The species has an entirely benthic life but pheromone induced clustering may occur. |
Population status (?) | Common (Moderate level of certainty) References (not structured): Minchin D, McGrath D, Duggan CB (1987) Calyptraea chinensis (Mollusca: Gastropoda) on the west coast of Ireland: a case of accidental introduction? Journal of Conchology 32(5): 297-301. Minchin D, Nunn J (2006) Further range extensions of the marine gastropod Calyptraea chinensis (L.) in Ireland. Irish Naturalists’ Journal. 28 (5): 200-203. Minchin D, Nunn J (2013) Rapid assessment of marinas for invasive alien species in Northern Ireland. A report undertaken for the Northern Ireland Environment Agency, Belfast. 96pp. Mc Comments: The first records of this species were from Clew Bay almost certainly followed imports of oysters from Brittany , France used for stocking of the wild beds. The population in Ballinakill Bay was probably arose as a result of movements of oysters from Clew Bay, ~50 km to the north. Those found in Galway Bay may also be from Clew Bay. The Cork Harbour population is likely to have been imported with oysters from Loch Ryan, Scotland which in turn, and according to McMillan (1968), may have been introduced from Brittany. The Strangford population source is unknown but is again most probably as a result of oyster movements, perhaps with small oysters imported from Guernsey. |
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Species status (?) | Non-indigenous species References (not structured): Minchin D, Nunn J (2006) Further range extensions of the marine gastropod Calyptraea chinensis (L.) in Ireland. Irish Naturalists’ Journal. 28 (5): 200-203. Urra J, Rueda JL, Gofas S, Marina P, Salas C (2012) A species-rich molluscan assemblage in a coralligenous bottom of the Alboran Sea (south-western Mediterranean): intra-annual changes and ecological considerations. Journal of the Marine Biological Association of the United Kingdom 92(4): 665-677. Comments: The species is native to the Atlantic Iberian coast and Bay of Biscay to Brittany. |
Created by | Dan Minchin |
Last update by | Dan Minchin, 2022-03-09 |