BIOTIC Species Information for Cerastoderma glaucum
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| Researched by | Nicola White | Data supplied by | MarLIN | ||||||||||||
| Refereed by | Dr Richard S.K. Barnes | ||||||||||||||
| Taxonomy | |||||||||||||||
| Scientific name | Cerastoderma glaucum | Common name | Lagoon cockle | ||||||||||||
| MCS Code | W1962 | Recent Synonyms | Cardium lamarckii | ||||||||||||
| Phylum | Mollusca | Subphylum | |||||||||||||
| Superclass | Class | Pelecypoda | |||||||||||||
| Subclass | Order | Veneroida | |||||||||||||
| Suborder | Family | Cardiidae | |||||||||||||
| Genus | Cerastoderma | Species | glaucum | ||||||||||||
| Subspecies | |||||||||||||||
| Additional Information | No text entered | ||||||||||||||
| Taxonomy References | Howson & Picton, 1997, | ||||||||||||||
| General Biology | |||||||||||||||
| Growth form | Bivalved |
Feeding method | Active suspension feeder |
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| Mobility/Movement | Burrower |
Environmental position | Infaunal |
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| Typical food types | No text entered | Habit | Free living | ||||||||||||
| Bioturbator | Flexibility | None (< 10 degrees) | |||||||||||||
| Fragility | Robust | Size | Small-medium(3-10cm) | ||||||||||||
| Height | Insufficient information | Growth Rate | 9.6 mm/year | ||||||||||||
| Adult dispersal potential | 100-1000m | Dependency | Independent | ||||||||||||
| Sociability | Solitary | ||||||||||||||
| Toxic/Poisonous? | No | ||||||||||||||
| General Biology Additional Information | The species exists in two forms, a typical thin-shelled variety found in brackish lagoon habitats and a thicker shelled variety occurring in estuaries. Growth rate during the first year takes place at a mean of 9.6 mm per year in Essex. Thereafter growth rate decreases to 4.9 mm in the second year and 2.5 mm in the third year (Boyden, 1972). | ||||||||||||||
| Biology References | Barnes, 1973, Boyden, 1972, Boyden & Russel, 1972, Barnes, 1980b, Barnes, 1994, Brock, 1979, Rygg, 1970, Ansell et al., 1981, | ||||||||||||||
| Distribution and Habitat | |||||||||||||||
| Distribution in Britain & Ireland | Orkney, Firth of Forth, East Anglia, Deben & Orwell estuaries, south coast of England, south Wales, the west coast of Scotland, and south and west coasts of Ireland. | ||||||||||||||
| Global distribution | Occurs from Norway and the Baltic to the Mediterranean and Black Seas. | ||||||||||||||
| Biogeographic range | Not researched | Depth range | Shallow | ||||||||||||
| Migratory | Non-migratory / Resident | ||||||||||||||
| Distribution Additional Information | The adult and juvenile populations are distributed differently. Juveniles (0.5-10 mm) attach to filamentous algae by means of byssus threads. When they reach a certain age, they migrate to the adult free-living sediment population (Labourg & Lasserre, 1980). | ||||||||||||||
| Substratum preferences | Coarse clean sand Fine clean sand Sandy mud Muddy sand Mud |
Physiographic preferences | Estuary Isolated saline water (Lagoon) |
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| Biological zone | Lower Eulittoral Sublittoral Fringe |
Wave exposure | Sheltered Very Sheltered |
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| Tidal stream strength/Water flow | Weak (<1 kn) |
Salinity | Low (<18 psu) Variable (18-40 psu) |
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| Habitat Preferences Additional Information | |||||||||||||||
| Distribution References | Labourg & Lasserre, 1980, Barnes, 1973, Boyden, 1972, Boyden & Russel, 1972, Barnes, 1980b, Barnes, 1994, Brock, 1979, Rygg, 1970, Ansell et al., 1981, Seaward, 1982, Seaward, 1990, Anonymous, 1999(s), | ||||||||||||||
| Reproduction/Life History | |||||||||||||||
| Reproductive type | Gonochoristic |
Developmental mechanism | Planktotrophic |
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| Reproductive Season | May to July | Reproductive Location | Insufficient information | ||||||||||||
| Reproductive frequency | Annual episodic | Regeneration potential | No | ||||||||||||
| Life span | 3-5 years | Age at reproductive maturity | Insufficient information | ||||||||||||
| Generation time | Insufficient information | Fecundity | Insufficient information | ||||||||||||
| Egg/propagule size | Insufficient information | Fertilization type | Insufficient information | ||||||||||||
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| Reproduction Preferences Additional Information | Veliger larvae have a pelagic life of from 11 to 30 days. Newly settled young attach temporarily by byssus threads to filamentous algae before becoming buried in the top few centimetres of sediment. Gametogenesis occurs in early spring and spawning takes place from May to July. Individuals live for about five years. | ||||||||||||||
| Reproduction References | Barnes, 1973, Rygg, 1970, Ansell et al., 1981, | ||||||||||||||
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