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Factors influencing the occurrence and distribution of Corbiculafluminea (Müller, 1774) in the River Lima estuary

Published online by Cambridge University Press:  15 February 2009

R. Sousa ,
C. Antunes  and
L. Guilhermino
R. Sousa
Affiliation:
CIIMAR – Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas 289, 4050-123 Porto, Portugal. ICBAS – Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Departamento de Estudos de Populações, Laboratório de Ecotoxicologia, Lg. Prof. Abel Salazar 2, 4099-003 Porto, Portugal.
C. Antunes
Affiliation:
CIIMAR – Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas 289, 4050-123 Porto, Portugal. Aquamuseu do Rio Minho ? Parque do Castelinho, 4920-290 Vila Nova de Cerveira, Portugal.
L. Guilhermino
Affiliation:
CIIMAR – Centro Interdisciplinar de Investigação Marinha e Ambiental, Rua dos Bragas 289, 4050-123 Porto, Portugal. ICBAS – Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Departamento de Estudos de Populações, Laboratório de Ecotoxicologia, Lg. Prof. Abel Salazar 2, 4099-003 Porto, Portugal.
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Abstract

This study evaluated the status of the Asian clam Corbicula fluminea (Müller, 1774) in the River Lima estuary (Portugal), which it first invaded in 2002. During the summers of 2004 and 2005, spatial and temporal variations in the abundance, biomass and population structure of C. fluminea were investigated in this estuary. This species was present in a limited intertidal area of the estuary and was rarely found in the subtidal zone. Its abundance and biomass were considerably lower than those found in other estuarine systems. Based on these studies it appears that salinity fluctuations and possibly other factors such as nutrients and environmental contaminants are keeping this invasive species from reaching its full potential. Given the lower abundance and biomass recorded and the restrict distribution of the species in this estuary, the eradication of this nonindigenous invasive species is still possible. The findings of this study may be useful for the management of this species not only in the River Lima estuary but also in other locations it may invade.

Keywords

Lima estuaryCorbicula flumineanonindigenous invasive speciespopulation structure
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 42 , Issue 3 , September 2006 , pp. 165 - 171
Copyright
© Université Paul Sabatier, 2006

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