Aquatic Invasions (2010) Volume 5, Issue 3: 263-284 doi: 10.3391/ai.2010.5.3.04 Open Access © 2010 The Author(s). Journal compilation © 2010 REABIC Proceedings of the Symposium on non-native freshwater species introduction in the Iberian Peninsula 12-13 November 2009, Pamplona, Spain Review Review and new records of non-indigenous freshwater invertebrates in the Ebro River basin (Northeast Spain) Javier Oscoz1*, Pedro Tomás2 and Concha Durán3 1Department of Zoology y Ecology, Faculty of Sciences, University of Navarra, P.O. Box 177, E-31080, Pamplona, Navarra, Spain 2Laboratorio de Ensayos Técnicos S.A., Polig. Ind. Valdeconsejo, C/Aneto, Parcela 8-A, E-50410 Cuarte de Huerva, Zaragoza, Spain 3Área Calidad de Aguas, Confederación Hidrográfica del Ebro, Paseo Sagasta 24-28, E-50071, Zaragoza, Spain E-mail:
[email protected] (JO),
[email protected] (PT),
[email protected] (CD) *Corresponding author Received: 5 December 2009 / Accepted: 19 July 2010 / Published online: 30 August 2010 Abstract This paper is the first attempt to compile a list of the non-indigenous aquatic invertebrate species currently known to occur in the Ebro River basin (Northeast Spain). A total of 23 exotic aquatic species have been recorded in this area, and one more (the branchiobdellida Xironogiton victoriensis) may also be present in this Iberian basin. Due to the negative impacts that biological invasions cause to ecosystems and to human activities, it is important to state the introduction pathways and prevent the spread of already introduced species. In order to fight against biological alien species invasions, development of national strategies on invasive alien species and international cooperation are considered essential.