89 documents found, page 1 of 9
Alternative habitat use strategies in the catadromous Chelon ramada inferred by...
Pereira, E.; Daverat, F.; Quintella, B.R.; Lança, M.J.; Almeida, P.R.Otolith chemical analyses of Sr, Ba, and Ca composition were conducted on thinlip grey mullet (Chelon ramada) collected from a freshwater (n = 45) and an estuarine (n = 55) site in the Mondego River (central Portugal) using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) to investigate the species’ habitat use patterns. The reconstruction of habitats used provides evidence for a behaviora...
Fully protected marine areas linked to reduced home ranges of fishes
Ohayon, S.; Abecasis, D.; Almeida, P.R.; Alós, J.; Aspillaga, E.; Belo, A.F.; Costa, J.L.; Franco, A.; Lorenzo, M.; Ferguson, A.; Guidetti, P.Home range size is a fundamental trait that can affect the probability of fish being harvested and, at the same time, may be affected by fishing. The relationship between home range size and fishing will impact the effectiveness of fully protected areas (FPAs), as it will influence the number of fish moving into fished areas, affecting both spillover and edge effects. One hypothesis is that individuals within F...
Behaviour of the apex predator European catfish (Silurus glanis) on a recently ...
Santos, G.S.; Ribeiro, F.; Pereira, E.; Silva, A.F; Almeida, P.R.; Ribeiro, D.; Quintella, B.R.The European catfish (Silurus glanis L.) is a large, non-native, invasive freshwater species known for its high fecundity, long lifespan and significant predatory potential, possibly threatening native fish communities. While some studies exist on its spatial use, most focus on its native range and lack detailed circadian and annual activity patterns. This study uses acoustic biotelemetry to track 10 adult fish...
Conserve marine migratory species to protect ecological links between land and sea
Lassalle, G.; Lambert, P.; Darnaude, A.M.; Almeida, P.R.N/A
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...
The seaward migration of European eel at a continental scale: A Europe-wide bio...
Verhelst, P.; Righton, D.; Aarestrup, K.; Almeida, P.R.; Bašic, T.; Bolland, J.D.; Carter, L.; Coeck, J.; Costa, J.L.; Dainys, J.; Davidsen, J.G.The European eel (Anguilla anguilla L.) has a catadromous life cycle, with a single panmictic population that colonises continental Europe and northern Africa yet migrates 5000 to 9000 km to spawn in the Atlantic Ocean. It is unknown how this continental migration is organised so individual eels arrive in time for spawning with conspecifics. This meta-analysis combined tracking data from 18 water bodies in fres...
Life Águeda – Restoring River Connectivity For Migratory Fish In The Vouga Rive...
Pedro, S.; Alexandre, CM; Mateus, CS; Quintella, BR; Boavida-Portugal, J; Lança, M.J.; Belo, AF; Pereira, E; Rato, AS; Oliveira, IC; Silva, SPresentation of the results of the work carried out on this subject in the Vouga River basin
Rumo ao Mar: Avaliação Da Migração De Juvenis De Salmão-do-Atlântico (Salmo sal...
Silva, S.; Alexandre, CM; Honrado, L; Mateus, CS; Quintella, BR; Lança, M.J.; Rato, AS; Oliveira, IC; Oliveira, R; Moreira, A; Almeida, R; Raposo, IO salmão-do-atlântico (Salmo salar L., 1758) é uma espécie piscícola migradora icónica dos ecossistemas aquáticos, com um elevado valor económico e cultural, cuja área de distribuição se localiza desde o mar Báltico até ao norte da Península Ibérica. Em Portugal, as populações de salmão encontram-se no limite sul da sua distribuição e, portanto, em condições sub-ótimas associadas com o regime térmico e variaçõe...
The cross between valuing fish andsustainability of resources
Jorge, André; Almeida, Marta; Ventura, Hugo; Machado, M. Graça; Almeida, P.R.; Alexandre, C.; Lança, M.J.As members of the Animal Science and Technology group (FST), our area of intervention are: on diadromous species (migratory) in the 7 Portuguese river basins; on a very relevant exotic species in main reservoirs in Alentejo (largemouth bass) and on experimental diets for breeding of wild trout in Campelo Aquaculture Station. Diadromous fish are those that migrate between freshwater and saltwater. Only 1% of the...
Homing and movement patterns of Iberian barbel (Luciobarbus bocagei) following ...
Rato, A.S.; Alexandre, C.M.; Oliveira, R.; Silva, A.F.; Marques, J.P.; Silva, S.; Lança, M.J.; Quintella, B.R.; Almeida, P.R.Assess intraespecific diferences in residency and migration; ii) Assess fidelity to the river of origin; Iii) Identify which environmental variables influence the presence/atraction of individuals downstream Foz Tua dam