Please use this identifier to cite or link to this item:
Title: Colonization and dispersal rates of two non-native crayfish species (Pacifastacus leniusculus and Procambarus clarkii) in NE Portugal
Authors: Bernardo, J.M.
Costa, A.M.
Bruxelas, S.
Teixeira, Amílcar
Keywords: Pacifastacus leniusculus
Procambarus clarkia
Issue Date: 2010
Citation: Bernardo, J.M.; Costa, A.M.; Bruxelas, S.; Teixeira, A. (2010) - Colonization and dispersal rates of two non-native crayfish species (Pacifastacus leniusculus and Procambarus clarkii) in NE Portugal. Comunicação Poster. European Crayfish Meeting. Poitiers
Abstract: In 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 impact and some are actually pristine. Recently, two American crayfish species reached the area: signal crayfish (Pacfastacus leniusculus) coming from Spain and red swamp crayfish. The isolation and the natural conditions of these rivers make them particularly valuable for the study of crayfish colonization and spreading. The colonization by both species was followed throughout the last decade in the Maçãs river (Douro catchment). Sampling was undertaken every year with baited traps. The average dispersal rate of signal crayfish was approximately 2 km/year, although a great variability among sectors was observed. Coexistence of signal and red swamp crayfish was detected in a large part of the river system. Signal crayfish developed well adapted and persistent populations. The lower abundance of red swamp crayfish is apparently caused by the low winter temperatures.
Peer review: yes
Appears in Collections:ARN - Resumos em Proceedings Não Indexados ao ISI/Scopus

Files in This Item:
File Description SizeFormat 
Abstracts European Crayfish Meeting Poitiers- França.pdf75,9 kBAdobe PDFView/Open

FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.