Abstract
This paper aims to set the record straight regarding the first observations of Corbicula fluminea (Muller, 1775) in the Guadiana River Basin. According to the available data, C. fluminea was first observed in 1988 and not in 2006 as suggested by Perez-Bote and Fernandez (2008). The first observations of C. fluminea in the Guadiana estuary were reported in 2000. In 2003, C. fluminea was already well established in the estuary and in many rivers and streams. C. fluminea is likely to expand its current biogeographic distribution in Portugal, since suitable lentic habitats for colonization will be crea ted by the implementation of the “National program of dams with high hydraulic potential”, which should be concluded by 2016.
Highlights
The Asian clam Corbicula fluminea (Müller, 1774) is one of the 100 worst invasive species in Europe (DAISIE 2009)
Pérez-Bote and Fernández (2008) stated that C. fluminea was first recorded in the Guadiana River Basin in June 2006, more precisely in the rivers Lacarón and Lobón and in the Montijo reservoir
In March 2000, the first observations of C. fluminea in the Guadiana estuary were registered in Guerreiros do Rio (37o23'52"N, 7o26'45"W), during a survey to identify the bivalves occurring along the first 40 kilometers of the estuary (Chícharo et al 2000)
Summary
The Asian clam Corbicula fluminea (Müller, 1774) is one of the 100 worst invasive species in Europe (DAISIE 2009). Pérez-Bote and Fernández (2008) stated that C. fluminea was first recorded in the Guadiana River Basin (southwestern Iberian Peninsula, Figure 1) in June 2006, more precisely in the rivers Lacarón and Lobón and in the Montijo reservoir. Pérez-Quintero (1990) had already registered the presence of C. fluminea in Rivera Grande de la Golondrina (Lower Guadiana River basin) in 1988.
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