Southern limit of distribution of the soft-shell clam Mya arenaria on the Atlantic East Coast

作者：Conde Anxo^*; Novais Julio; Dominguez Jorge

来源：Biological Invasions, 2010, 12(3): 429-432.

DOI：10.1007/s10530-009-9460-1

• Mya arenaria
• Tagus estuary
• Ballast water

The invasive soft-shell clam Mya arenaria was recorded for the first time in the Tagus estuary, central Portugal. Propagules of the soft-shell clam were probably unintentionally introduced into the Tagus estuary through ballast water. Mya arenaria was observed in muddy sands in the upper intertidal zone. The assemblage in which the soft-shell clam was observed was composed of typical estuarine species such as the gastropod Hydrobia ulvae, the bivalve Scrobicularia plana and several polychaete species. The population density of Mya arenaria in the finding area was 40 ind m(-2) with a fresh biomass of 163.5 g FW m(-2).

• 出版日期2010-3