NE Portugal is one of the most isolated and low populated regions of Western Europe. Recently, two American crayfish species reached this area: signal crayfish Pacifastacus leniusculus coming from Spain and red swamp crayfish Procambarus clarkii in its northward expansion. The dispersion of both species was followed throughout the last decade in river Maçãs (Douro catchment). Our results support the hypothesis ...
Gestão Ambiental dos Sistemas Fluviais: Aplicação à bacia hidrográfica do rio Sado. Ictiofauna do Rio Sado: características gerais e valor de conservação.
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