Browsing by Subject "Non-native species"

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    Inter-population variability in growth and reproduction of invasive bleak Alburnus alburnus (Linnaeus, 1758) across the Iberian Peninsula
    (CSIRO Publishing, 2018-03-26) Latorre, Dani; Masó, Guillem; Verdiell Cubedo, David; Tarkan, Ali Serhan; Vila Gispert, Anna; Copp, Gordon H.; Cucherousset, Julien; da Silva, Eduardo; Fernández Delgado, Carlos; García Berthou, Emili; Miranda, Rafael; Oliva Paterna, Francisco J.; Ruiz Navarro, Ana; Serrano, José M.; Almeida, David; Didáctica de las Ciencias Experimentales
    The native European freshwater cyprinid fish, common bleak Alburnus alburnus (Linnaeus, 1758), is an invasive non-native fish in the Iberian Peninsula, where it threatens the valuable endemic fish fauna. Despite the bleak’s invasive status, there is a dearth of studies on the biological traits of non-native populations in Europe’s Mediterranean region, and the present study aimed to compare bleak growth and reproductive traits across the principal rivers of Iberia with those from a native ‘reference’ bleak population in France. Non-native bleak from the River Tagus had the highest back-calculated total lengths (TLs), growth rate and body condition, but the lowest reproductive investment and smallest egg size of all studied populations. Whereas, these latter two traits were the highest in the River Ebro, where fecundity was the lowest for all Iberian rivers. The youngest age and the smallest TL at maturity were observed in the River Ebro. The River Segura had the lowest back-calculated TLs and growth rate, the highest fecundity and proportion of females, and the oldest age at maturity. Population traits of bleak in the River Saoˆne (the native ‘reference’ population) were generally different from those in Iberian rivers, except for the River Ebro. This wide inter-population variability contributes to the species’ successful establishment in novel habitats.
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    Primeras citas de la lucioperca, Sander (= Stizostedion)lucioperca (Linnaeus, 1758) y del alburno, Alburnus alburnus (Linnaeus,1758) en las cuencas extremeñas de los ríos Tajo y Guadiana, SO de la Península Ibérica
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 2004) Pérez-Bote, José Luis; Roso Romero, Rafael; Pula, Héctor J.; Díaz, Fátima; López, María Teresa; Sin departamento asociado; Facultad de Biología
    Con este trabajo el conocimiento de la distribución de la lucioperca y del alburno se extiende a las cuencas extremeñas de los ríos Tajo y Guadiana. Hasta la fecha se ha encontrado una distribución muy localizada para ambas especies, pero parece que han iniciado su fase expansiva en ambas cuencas. La hipótesis más probable para justificar la presencia de esas especies puede estar relacionada con introducciones realizadas por pescadores deportivos.