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.
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Beal BF, Parker MR, Vencile KW (2001) Seasonal effects of intraspecific density and predator exclusion along a shore-level gradient on survival and growth of juveniles of the soft-shell clam, Marenaria L., in Maine, USA. J Exp Mar Biol Ecol 264:133–169. doi:10.1016/S0022-0981(01)00320-3
Braunschweig F, Martins F, Chambel P, Neves R (2003) A methodology to estimate renewal time scales in estuaries: the Tagus Estuary case. Ocean Dyn 53:137–145. doi:10.1007/s10236-003-0040-0
Buchanan JB (1984) Sediment analysis. In: Holme AN, McIntyre AD (eds) Methods for the Study of Marine Benthos, 2nd edn. Blackwell, Oxford, pp 41–65
Calvário J (2001) Characterization of the Tagus estuary macrobenthic communities. Bol Mus Mun Funchal 6:313–330
Gollasch S (2006) Overview on introduced aquatic species in European navigational and adjacent waters. Helgol Mar Res 60:84–89. doi:10.1007/s10152-006-0022-y
Guimarães MC, Galhano MH (1988) Ecological study of the estuary of River Lima (Portugal): II—a mud-sandy beach. Publ Inst Zool Dr Augusto Nobre 205:1–73
Powers SP, Bishop MA, Grabowski JH, Peterson CH (2006) Distribution of the invasive bivalve M. arenaria L. on intertidal flats of southcentral Alaska. J Sea Res 55:207–216. doi:10.1016/j.seares.2005.10.004
Rodrigues AM, Meireles S, Pereira T, Gama A, Quintino V (2006) Spatial patterns of benthic macroinvertebrates in intertidal areas of a southern European estuary: the Tagus, Portugal. Hydrobiologia 555:99–113. doi:10.1007/s10750-005-1109-1
Sousa R, Dias S, Antunes JC (2006) Spatial subtidal macrobenthic distribution in relation to abiotic conditions in the Lima estuary, NW of Portugal. Hydrobiologia 559:135–148. doi:10.1007/s10750-005-1371-2
Strasser M (1999) M. arenaria—an ancient invader of the North Sea Coast. Helgol Meersunters 52:309–324. doi:10.1007/BF02908905
Ysebaert T, Meire P, Coosen J, Essink K (1998) Zonation of intertidal macrobenthos in the estuaries of Schelde and Ems. Aquat Ecol 32:53–71. doi:10.1023/A:1009912103505
Part of this research was funded by the Spanish Government through the Spanish Agency for Foreign Cooperation (AECI, acronym in Spanish). We are grateful to the Lisbon Port Authority for their full cooperation and logistic support.
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Conde, A., Novais, J. & Domínguez, J. Southern limit of distribution of the soft-shell clam Mya arenaria on the Atlantic East Coast. Biol Invasions 12, 429–432 (2010). https://doi.org/10.1007/s10530-009-9460-1
- Mya arenaria
- Tagus estuary
- Ballast water