23 documents found, page 1 of 3
Avaliação socioeconómica e cultural da pesca do salmão-do-atlântico em Portugal
Raposo, I.; Silva, S.; Alexandre, C.M.; Stratoudakis, Y.; Belo, A.F.; Mateus, C.S.; Lança, M.J.; Almeida, P.R.O salmão-do-atlântico (Salmo salar) é uma espécie anádroma emblemática do Hemisfério Norte e autóctone em Portugal. Segundo a IUCN o seu estatuto de conservação global é Pouco Preocupante (LC), mas em Portugal encontra-se classificado como Criticamente em Perigo (CR), sendo provavelmente a população desta espécie mais ameaçada à escala global. A sua abundância na Europa diminuiu em toda a área nativa, fruto de ...
Evidence of genetic segregation among meagre (Argyrosomus regius) Atlantic spaw...
Almeida, R.; Mateus, C.S.; Alves, M.J.; Marques, J.P.; Pereira, J.; Prista, N.; Cabral, H.; Almeida, P.R.; Quintella, B.R.The meagre Argyrosomus regius, one of the largest sciaenidae in the world, is a valuable resource for fisheries and aquaculture. Despite its socioeconomic relevance, knowledge about population dynamics and wild stocks is still scarce, and conservation risks are associated with overexploitation. Two genetic distinct groups, one in the North Atlantic Ocean and one in the eastern Mediterranean Sea, were identified...
Fish pass use by shads (Alosa alosa L. and Alosa fallax (Lacépède, 1803)): impl...
Belo, A.F.; Cardoso, G.; Pereira, E.; Quintella, B.R.; Mateus, C.S.; Alexandre, C.; Batista, C.; Telhado, A.; Quadrado, M.F.; Almeida, P.R.Fish pass monitoring is essential to ensure the device's effectiveness as a mitigation measure for river impoundment, guaranteeing the longitudinal continuity of rivers, which is particularly important for diadromous fish that depend on obligatory migrations to freshwater reproduction (anadromous) or feeding areas (catadromous) to complete their life cycle. The upstream migration of the anadromous allis (Alosa ...
Management of anadromous lampreys: Common threats, different approaches.
Clemens, B. J.; Arakawa, H.; Baker, C.; Coghlan, S.; Kucheryavyy, A.; Lampman, R.; Lança, M.J.; Mateus, C.S.; Miller, A.; Nazari, H.; Pequeno, G.Ten anadromous lamprey species (Petromyzontiformes) are recognized around the world, including four species in the Southern Hemisphere and six in the Northern Hemisphere. Eleven threats to these anadromous lampreys have been identified: climate change, shifting oceanographic regimes, artificial barriers, low water quantity/flow management, habitat degradation, poor water quality, reduced habitat availability, h...
Fish pass use by shads (Alosa alosa L. and Alosa fallax [Lacépède, 1803]): Impl...
Belo, A.F.; Cardoso, G.; Pereira, E.; Quintella, B.R.; Mateus, C.S.; Alexandre, C.M.; Batista, C.; Telhado, A.; Quadrado, M.F.; Almeida, P.R.Fish pass monitoring is essential to ensure the device's effectiveness as a mitigation measure for river impoundment, guaranteeing the longitudinal continuity of rivers, which is particularly important for diadromous fish that depend on obligatory migrations to freshwater reproduction (anadromous) or feeding areas (catadromous) to complete their life cycle. The upstream migration of the anadromous allis (Alosa ...
Living on the Edge: Management and Conservation of Atlantic Salmon at the South...
Alexandre, C.; Silva, S.; Mateus, C.S.; Lança, M.J.; Quintella, B.R.; Belo, A.F.; Domingues, A.; Rato, A.S.; Oliveira, R.; Moreira, A.; Pereira, J.Atlantic salmon (Salmo salar L.) are an emblematic anadromous fish species that inhabit marine and freshwater ecosystems in the Northern Hemisphere. In Portugal, the southern limit of its global distribution range, the species is classified as Critically Endangered (CR), and occurs only in the Minho and Lima rivers, which hold the most abundant populations, with occasional confirmed occurrences in the Cávado an...
LIFE Agueda—Gaining Habitat for Migratory Fish in the Vouga River Basin
Pedro, S.; Alexandre, C.M.; Mateus, C.S.; Quintella, B.R.; Lança, M.J.; Belo, A.F.; Pereira, E.; Rato, A.S.; Oliveira, I.; Silva, S.; Almeida, P.R.Habitat loss and overfishing are the most significant threats to diadromous fish, most of them of high socioeconomic and conservationist importance, such as Alosa alosa, Alosa fallax, Petromyzon marinus and Anguilla anguilla. The main objective of the LIFE Águeda project (LIFE16 ENV/PT/000411) is the removal of hydro-morphological pressures towards the reestablishment of conditions for a good ecological status,...
A vida no limite: gestão e conservação das populações de salmão do Atlântico em...
Alexandre, C.; Silva, S.; Bedmar, S.; Quintella, B.R.; Mateus, C.S.; Lança, M.J.; Almeida, P.R.As ações nacionais de gestão e conservação de salmão do Atlântico são habitualmente prejudicadas pelo pouco conhecimento que temos sobre as nossas populações. Este projeto pretende contribuir para melhorar o conhecimento sobre o salmão em Portugal, através de uma parceria entre cientistas e pescadores. Abordagens integradas, em contexto nacional, desenvolvidas recentemente e focadas nas espécies anádromas, most...
Proposals for optimizing sea lamprey passage through a vertical-slot fishway
Pereira, E.; Cardoso, G.R.; Quintella, B.R.; Mateus, C.S.; Alexandre, C.M.; Oliveira, R.; Belo, A.D.F.; Telhado, A.; Quadrado, M.F.; Batista, C.Movement of sea lamprey through a vertical‐slot fishway (built at the Coimbra dam,in central Portugal) was continuously monitored between 2013 and 2016 by a videorecording system. Visual count data were used to quantify the overall successfulmovements and identify seasonal and circadian patterns of fishway use. Explicativemodels (Boosted Regression Trees) were used to study the relationship between frequencyof ...
Environmental and ecological indicators of fish mass-mortality phenomena in med...
Alexandre, C.M.; Silva, A.F.; Marques, J.P.; Pereira, E.; Belo, A.D.F.; Sá, C.; Tracana, A.; Mateus, C.S.; Quintella, B.R.; Lança, M.J.; Almeida, P.R.Reservoirs are the preferred locations for anglers in Mediterranean regions. However, such ecosystems are impaired by a set of characteristics and phenomena that can constrain the suitable management and exploitation of related goods and services, especially in the current climate change context. In these reservoirs, eutrophication is one of the main water quality problem. These systems are often affected by la...