8 documents found, page 1 of 1
Fishways in Portugal: status, main findings and research needs
Santos, J.M.; Quaresma, A.L.; Romão, F.; Amaral, S.D.; Mameri, D.; Santo, M.; Bochechas, J.; Telhado, A.; Godinho, F.N.; Pádua, J.; Pinheiro, P.J.Anthropogenic barriers fragment Portuguese rivers, threatening endemic freshwater fish communities. This study compiled national inventories and peer-reviewed research (2002–2024) to quantify fishway implementation, evolution and typology, while evaluating fish performance from published research. One hundred fishways built between 1950 and 2024 were recorded, half of which were constructed after the implementa...
Upstream movement of juvenile eels (Anguilla anguilla L.) in a southwestern Eur...
Monteiro, R.M.; Domingo, I.; Almeida, P.R.; Costa, J.L.; Pereira, E.; Belo, A.F.; Portela, T.; Telhado, A.; Quintella, B.R.The upstream movement of juvenile eels (median total length (TL) = 138 mm) in the Mondego River, Portugal, was analysed between January 2017 and August 2019. A total of 12,019 individuals (TL ranging from 60 to 287 mm) were counted and measured on an eel ladder at Coimbra weir, 44 km upstream from the river mouth, during their upstream movements. Although eels were counted throughout the year, a clear seasonal ...
Migratory Patterns of Two Potamodromous Fish Species Assessed through Fish-Pass...
Rato, Ana Sofia; Alexandre, Carlos; Pedro, Sílvia; Mateus, Catarina; Pereira, Esmeralda; Belo, Ana Filipa; Quintella, Bernardo R.; Quadrado, Maria F.The Iberian barbel (Luciobarbus bocagei Steindachner, 1864) and the Iberian nase (Pseudochondrostoma polylepis Steindachner, 1864) are two potamodromous species that migrate upstream in freshwater environments to reproduce. Thus, river fragmentation is a major threat to these species, and fish passes are one of the most-used mitigation measures to restore the longitudinal connectivity of impounded rivers, enabl...
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 ...
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 ...
Temporal patterns of the catadromous thinlip grey mullet migration in freshwater
Pereira, E.; Quintella, B.; Lança, M.J.; Alexandre, C.; Mateus, C.; Pedro, S.; Belo, A.; Rato, A.; Quadrado, M.; Baptista, C.; Telhado, A.Abstract The thinlip grey mullet (Chelon ramada Risso, 1827) is a catadromous fish that per forms massive migrations to freshwater habitats for feeding purposes that can assume a structuring role on riverine ecology due to the biomass involved in these movements. Seasonal movements of thinlip grey mullet through a vertical slot fish pass located in River Mondego (Portugal) were continuously monitored between 20...
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 ...
Performance of a vertical slot fish pass for the sea lamprey Petromyzon marinus...
Pereira, E.; Quintella, B.R.; Mateus, C.S.; Alexandre, C.M.; Belo, A.D.F.; Telhado, A.; Quadrado, M.F.; Almeida, P.R.In 2011, a vertical-slot fish pass was built at the Coimbra Açude-Ponte dam (Mondego River, Portugal), approximately 45 km upstream from the river mouth. The performance of this infrastructure for sea lamprey passage was evaluated between 2011 and 2015 using several complementary methodologies, namely radio telemetry [conventional and electromyogram (EMG)], passive integrated transponder (PIT) telemetry and ele...