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Dispersal and coexistence of two non-native crayfish species (Pacifastacus leni...
Bernardo, J.M.; Costa, A.M.; Bruxelas, S.; Teixeira, AmílcarNE 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 ...
Coexistência de duas espécies exóticas de lagostins (Pacifastacus leniusculus e...
Costa, A.M.; Bruxelas, S.; Bernardo, J.M.; Teixeira, AmílcarEm Portugal existia uma única espécie europeia de lagostim de água doce, Austropotamobius pallipes, o lagostim-de-patas-brancas, que se considera actualmente extinta no país. No nordeste de Portugal continental onde anteriormente ocorria esta espécie, os cursos de água estão actualmente a ser colonizados por duas espécies de lagostins norte americanos. Na década de 70, proveniente de Espanha onde foi intenciona...
Interacção entre duas espécies exóticas de lagostins (pacifastacus leniusculus ...
Teixeira, Amílcar; Costa, A.M.; Bernardo, J.M.; Bruxelas, S.; Nogueira, Mónica Sofia ReisNo rio Maçãs (bacia do Rio Douro), no Nordeste de Portugal, coexistem duas espécies de lagostins exóticos, o lagostim vermelho da Louisiana (Procambarus clarkii) e o lagostim sinal (Pacifastacus leniusculus). Para estudar o movimento e padrão de actividade de ambas as espécies foi desenvolvida uma experiência num espaço confinado (300 x 100 cm) e aplicada a técnica da PIT-telemetria (Passive Integrated Technolo...
Colonization and dispersal rates of two non-native crayfish species (Pacifastac...
Bernardo, J.M.; Costa, A.M.; Bruxelas, S.; Teixeira, AmílcarIn Europe, a generalized regression of the native crayfish was observed during the past decades. Simultaneously, several non-native species spread in most countries. In Portugal, the red swamp crayfish, Procambarus clarkii, is now occurring in most inland waters. The NE Portugal is one of the most isolated and low populated regions of Western Europe. Most rivers in these region present low levels of human impac...
Colonization of Rio Maçãs (North Portugal) by two exotic crayfish, Pacifastacus...
Costa, A.M.; Bruxelas, S.; Bernardo, J.M.; Teixeira, AmílcarIn Portugal there was only one European crayfish species, the white clawed Austropotamobius pallipes. During the last decades, a sharp regression of these populations took place and the species is presently considered extinct in Portugal. Coming from Spain, two American species invaded the Portuguese freshwaters. The red swamp crayfish, Procambarus clarkii, a sub-tropical species, extremely resistant to severe ...
Movement and interaction of two exotic crayfish (Pacifastacus leniusculus and P...
Teixeira, Amílcar; Costa, A.M.; Bernardo, J.M.; Bruxelas, S.The coexistence of two exotic crayfish species (Procambarus clarkii and Pacifastacus leniusculus) was observed in a stretch of Rio Maçãs (Douro basin, Northeast of Portugal). The red swamp crayfish, P. clarkii, a sub-tropical species, was first detected in 1979 in Rio Caia (Alentejo) and from there rapidly spread through most freshwater bodies. This species is extremely resistant to severe climatic conditions, ...
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