Dynamics of an Abra alba population (bivalve-scrobiculariidae) in the Bay of Brest |
| |
| Authors: | C Hily H Le Bris |
| |
| Institution: | Université de Bretagne Occidentale, Laboratoire D''Océanographie Biologique, Brest, France |
| |
| Abstract: | The Abra population studied, lived in a muddy-sand Melinna palmata community in the vicinity of the harbour of Brest. There were two periods of spawning in the year: June to August and end of autumn. Individuals 12 mm long can spawn after the first winter. Recruitment was regularly observed in 1 mm mesh sieves in May and September–October. Growth rings were formed in winter; a second growth ring in summer was correlated with spawning. The modal analysis showed a decreasing growth rate and maximum length for the successive cohorts over the three years surveyed. Growth characteristics observed in this population seem to be due to disturbances brought about by neighbouring dredgings which had just ended at the beginning of the study. |
| |
| Keywords: | Biological interactions demography |
| 本文献已被 ScienceDirect 等数据库收录！ |
