Encontrados 16 documentos, a visualizar página 1 de 2
A dataset of acoustic measurements from soundscapes collected worldwide during ...
Challéat, Samuel; Farrugia, Nicolas; Froidevaux, Jérémy S. P.; Gasc, Amandine; Pajusco, Nicolas; Abrahams, Carlos R.; Acevedo-Charry, OrlandoPolitical responses to the COVID-19 pandemic led to changes in city soundscapes around the globe. From March to October 2020, a consortium of 261 contributors from 35 countries brought together by the Silent Cities project built a unique soundscape recordings collection to report on local acoustic changes in urban areas. We present this collection here, along with metadata including observational descriptions o...
Passability of potamodromous species through a fish lift at a large hydropower ...
Mameri, Daniel; Rivaes, Rui; Oliveira, João M.; Pádua, João; Ferreira, Teresa; Santos, José M.River fragmentation by large hydropower plants (LHP) has been recognized as a major threat for potamodromous fish. Fishways have thus been built to partially restore connectivity, with fish lifts representing the most cost-effective type at high head obstacles. This study assessed the effectiveness with which a fish lift in a LHP on the River Lima (Touvedo, Portugal), allows potamodromous fish—Iberian barbel (L...
Mito-nuclear sequencing is paramount to correctly identify sympatric hybridizin...
Sousa-Santos, Carla; Pereira, Ana M.; Branco, Paulo; Costa, G.J.; Santos, José M.; Ferreira, Teresa; Lima, Cristina S.; Doadrio, IgnacioBackground. Hybridization may drive speciation and erode species, especially when intrageneric sympatric species are involved. Five sympatric Luciobarbus species—Luciobarbus sclateri (Günther, 1868), Luciobarbus comizo (Steindachner, 1864), Luciobarbus microcephalus (Almaça, 1967), Luciobarbus guiraonis (Steindachner, 1866), and Luciobarbus steindachneri (Almaça, 1967)—are commonly identified in field surveys b...
Mito-nuclear sequencing is paramount to correctly identify sympatric hybridizin...
Santos, Carla Sousa; Pereira, Ana Martins; Branco, Paulo; Costa, Gonçalo J.; Santos, José M.; Ferreira, Maria Teresa; Lima, Cristina M.Background. Hybridization may drive speciation and erode species, especially when intrageneric sympatric species are involved. Five sympatric Luciobarbus species—Luciobarbus sclateri (Günther, 1868), Luciobarbus comizo (Steindachner, 1864), Luciobarbus microcephalus (Almaça, 1967), Luciobarbus guiraonis (Steindachner, 1866), and Luciobarbus steindachneri (Almaça, 1967)—are commonly identified in field surveys b...
How does season affect passage performance and fatigue of Potamodromous Cyprini...
Romão, Filipe; Santos, José M.; Katopodis, Christos; Pinheiro, António N.; Branco, PauloMost fishway studies are conducted during the reproductive period, yet uncertainty remains on whether results may be biased if the same studies were performed outside of the migration season. The present study assessed fish passage performance of a potamodromous cyprinid, the Iberian barbel (Luciobarbus bocagei), in an experimental full-scale vertical slot fishway during spring (reproductive season) and early-a...
Importance of considering riparian vegetation requirements for the long-term ef...
Rivaes, Rui; Boavida, Isabel; Santos, José M.; Pinheiro, António N.; Ferreira, Maria TeresaEnvironmental flows remain biased toward the traditional biological group of fish species. Consequently, these flows ignore the inter-annual flow variability that rules species with longer lifecycles and therefore disregard the long-term perspective of the riverine ecosystem. We analyzed the importance of considering riparian requirements for the long-term efficiency of environmental flows. For that analysis, w...
Feeding ecology of the Ruivaco Achondrostoma oligolepis, a portuguese endemic c...
Santos, José M.; Encina, Lourdes; Oliveira, João Manuel; Teixeira, AmílcarThis study assessed the feeding ecology of the ruivaco Achondrostoma oligolepis, a Portuguese endemic resident cyprinid fish whose dietary habits are virtually unknown. Samples were taken seasonally in three medium-sized rivers representing a gradient of temporality. The stomach contents of 97 individuals (42-126 mm total length, TL) were analysed. Although there was no significant overall variation in diet com...
Modelling stream-fish functional traits in reference conditions: regional and l...
Oliveira, João Manuel; Segurado, Pedro; Santos, José M.; Teixeira, Amílcar; Ferreira, Maria T.; Cortes, Rui M.V.Identifying the environmental gradients that control the functional structure of biological assemblages in reference conditions is fundamental to help river management and predict the consequences of anthropogenic stressors. Fish metrics (density of ecological guilds, and species richness) from 117 least disturbed stream reaches in several western Iberia river basins were modelled with generalized linear models...
Cyprinid swimming behaviour in response to turbulent flow
Silva, Ana T.; Katopodis, Christos; Santos, José M.; Ferreira, Maria Teresa; Pinheiro, António N.Turbulence is a complex phenomenon which commonly occurs in river and fishway flows. It is a difficult subject to study, especially biologically, yet turbulence may affect fish movements and fish passage efficiency. Studies on quantifying fish responses to turbulence, particularly within fishways, are lacking. This study investigated the swimming behaviour of 140 adult Iberian barbel (Luciobarbus bocagei) of tw...
Cyprinid swimming behaviour in response to turbulent flow
Silva, Ana T.; Katopodis, Christos; Santos, José M.; Ferreira, Maria Teresa; Pinheiro, António T.Turbulence is a complex phenomenon which commonly occurs in river and fishway flows. It is a difficult subject to study, especially biologically, yet turbulence may affect fish movements and fish passage efficiency. Studies on quantifying fish responses to turbulence, particularly within fishways, are lacking. This study investigated the swimming behaviour of 140 adult Iberian barbel (Luciobarbus bocagei) of tw...