Encontrados 5 documentos, a visualizar página 1 de 1
Investigating Population Structure of Sea Lamprey (Petromyzon marinus, L.) in W...
Lança, M.J.; Machado, Maria; Mateus, C.S.; Lourenço, M.; Ferreira, A.F.; Quintella, B.R.; Almeida, P.R.This study hypothesizes the existence of three groups of sea lamprey Petromyzon marinus L. in Portugal (North/Central group, Tagus group, and Guadiana group), possibly promoted by seabed topography isolation during the oceanic phase of the life cycle. Within this context, our purpose was to analyze the existence of a stock structure on sea lamprey populations sampled in the major Portuguese river basins using b...
Lampreys of the Iberian Peninsula: distribution, population status and conserva...
Mateus, C.S.; Rodríguez-Muñoz, R.; Quintella, B.R.; Alves, M.J.; Almeida, P.R.The 3 lamprey species, sea lamprey Petromyzon marinus L., European river lamprey Lampetra fluviatilis L. and European brook lamprey L. planeri Bloch, that inhabit the Iberian Peninsula are of conservation concern. They are considered either Vulnerable, Critically Endangered, and even Extinct in different regions of this area mainly due to habitat loss and population fragmentation. Although several other factors...
Can heart tissue fatty acid profile be used as a tool to discriminate sea lampr...
Lança, M.J.; Machado, M.; Ferreira, R.; Alves-Pereira, I.; Mateus, C.; Quintella, B.R.; Almeida, P.R.This study proposes to evaluate the use of heart tissue fatty acid signature and multivariate analysis of fatty acid profile as a possible discriminating tool for sea lamprey P. marinus populations sampled in Portuguese river basins. Local fisherman collected adult sea lampreys in eight Portuguese river basins (Minho, Lima, Cávado, Douro, Vouga, Mondego, Tagus and Guadiana) at the beginning of their spawning mi...
Developments in fish telemetry
Almeida, Pedro R.; Quintella, B.R.; Costa, M.J.; Moore, A.Freshwater and marine ecosystems continue to be the focus of significant environmental change associated with an expanding human population and a rapidly changing climate. Many organisms within these environments, and fish in particular, are susceptible to increasing pressures, ranging from exploitation to modifications and loss of habitat. In order to manage and conserve these populations and protect biodivers...
Avaliação das necessidades em água doce do estuário do Guadiana (Portugal) com ...
Almeida, Pedro R.; Costa, M.J.; Costa, J.L.; Quintella, B.R.; Bettencourt, A.M.The importance of the freshwater inflows to the estuarine and adjoining coastal waters fish communities are put in evidence and a relationship between the commercial fisheries landings and freshwater inflow is presented. For the period between 1988 and 2000, twenty-one different equations were obtained, relating fish catches landed at the Vila Real de Santo António harbor, and the freshwater flow of the River G...
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