António N. Pinheiro
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View article: Fishways in Portugal: Status, Main Findings and Research Needs
Fishways in Portugal: Status, Main Findings and Research Needs Open
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,…
View article: Stopping invaders: Moving towards a selective vertical slot fishway to prevent the passage of non-native cyprinids
Stopping invaders: Moving towards a selective vertical slot fishway to prevent the passage of non-native cyprinids Open
Invasive fish species are a major driver of freshwater ecosystem degradation across the globe. This urgent problem is particularly tough to manage in dammed rivers, where the reestablishment of longitudinal connectivity for native fish is …
View article: A Comparative Assessment of Reynolds Averaged Navier–Stokes and Large-Eddy Simulation Models: Choosing the Best for Pool-Type Fishway Flow Simulations
A Comparative Assessment of Reynolds Averaged Navier–Stokes and Large-Eddy Simulation Models: Choosing the Best for Pool-Type Fishway Flow Simulations Open
Fishways are an important solution for mitigating the ecological impacts of river barriers, with their hydrodynamics playing a key role in their effectiveness. Computational fluid dynamics (CFD) is now one of the main tools to predict and …
View article: Macrobrachium amazonicum (Decapoda, Palaemonidae): geographic distribution, new occurrences and biogeographic insights
Macrobrachium amazonicum (Decapoda, Palaemonidae): geographic distribution, new occurrences and biogeographic insights Open
The shrimp Macrobrachium amazonicum (Heller, 1862) is a widely distributed native species in South America. This study presents an updated geographic distribution of the species through a systematic review of primary and secondary data, as…
View article: Life cycle assessment of laboratory-scale chitosan production: comparison of high-pressure processing-assisted and conventional methods
Life cycle assessment of laboratory-scale chitosan production: comparison of high-pressure processing-assisted and conventional methods Open
Chitosan is in high demand due to its wide range of applications, resulting in a reliable market. Conventional chemical extraction methods of chitosan are harsh, require strong acids and bases, and produce toxic waste products. High-pressu…
View article: The hide-and-seek effect of pulsed-flows in a potamodromous cyprinid fish
The hide-and-seek effect of pulsed-flows in a potamodromous cyprinid fish Open
The artificial pulsed-flows impact associated with hydropower production on the downstream biological and physical processes has been extensively addressed, showing that it may cause fish drift while changing fish habitat selection toward …
View article: Debating the Rules: An Experimental Approach to Assess Cyprinid Passage Performance Thresholds in Vertical Slot Fishways
Debating the Rules: An Experimental Approach to Assess Cyprinid Passage Performance Thresholds in Vertical Slot Fishways Open
Throughout the world, emerging barriers in river systems block longitudinal connectivity for migrating fish, causing significant impacts by precluding them from carrying out vital life cycle activities. Fishways are still the main mitigati…
View article: Seasonal and Size-Related Fish Microhabitat Use Upstream and Downstream from Small Hydropower Plants
Seasonal and Size-Related Fish Microhabitat Use Upstream and Downstream from Small Hydropower Plants Open
Hydropower can have significant impacts on riverine ecosystems due to hydropeaking (i.e., artificial rapid and short-term fluctuations in water flow and water levels downstream and upstream of hydropower stations) that negatively affect do…
View article: Vertical Slot Fishways: Incremental Knowledge to Define the Best Solution
Vertical Slot Fishways: Incremental Knowledge to Define the Best Solution Open
River artificial fragmentation is arguably the most imperilling threat for freshwater-dependent fish species. Fish need to be able to freely move along river networks as not only spawning grounds but also refuge and feeding areas may be sp…
View article: Mitigating the hydropeaking using flow refuge: an experimental case-study
Mitigating the hydropeaking using flow refuge: an experimental case-study Open
The artificial pulsed flows occurring downstream of hydropower plants due to electricity demand, i.e. hydropeaking, affect habitat selection by fish. This effect is particularly unknown for cyprinids, which are the most representative fres…
View article: River Network Connectivity—An Holistic Approach to Improve the Sustainability of Fish Populations
River Network Connectivity—An Holistic Approach to Improve the Sustainability of Fish Populations Open
Rivers are intrinsically linked with human settlement and civilization development. This has forced upon rivers a multitude of pressures. Arguably, one of the most pervasive pressures is river network fragmentation. The consequent loss of …
View article: A Matter of Approach: Analysis of the Flow Refuge Preferences of Iberian Barbels during Pulsed Flows in Flume Conditions
A Matter of Approach: Analysis of the Flow Refuge Preferences of Iberian Barbels during Pulsed Flows in Flume Conditions Open
To fight against global warming, we have to change our ways of consuming energy. Due to its low carbon impact and strong dispatchability, hydroelectric production will be one of the bases of this transition. However, peak electricity deman…
View article: EcoPeak4Fish: A Multidisciplinary Project Targeting the Protection of Fish Populations Affected by Hydropeaking
EcoPeak4Fish: A Multidisciplinary Project Targeting the Protection of Fish Populations Affected by Hydropeaking Open
Hydroelectricity demand is still growing due to its reduced carbon impact and strong dispatchability. Concurrently, the necessity to support self-sustainable fish populations in a cost-effective way and restore water-related ecosystems is …
View article: Hydropeaking impact assessment for Iberian cyprinids and leuciscids: An adaptation of the hydropeaking tool method
Hydropeaking impact assessment for Iberian cyprinids and leuciscids: An adaptation of the hydropeaking tool method Open
Hydropeaking negatively affects fish assemblages, but knowledge gaps still constrain our ability to rank and mitigate the impacts of different hydropower operation regimes at particular power plants. This is especially relevant for species…
View article: Hydropeaking Impact Assessment for Iberian Cyprinids: Hydropeaking Tool Adaptation
Hydropeaking Impact Assessment for Iberian Cyprinids: Hydropeaking Tool Adaptation Open
Hydropeaking negatively affects fish assemblages, but knowledge gaps still constrain our ability to rank and mitigate the impacts of different hydropower operation regimes at particular power plants. This is especially relevant for species…
View article: Modelling of Pool-Type Fishways Flows: Efficiency and Scale Effects Assessment
Modelling of Pool-Type Fishways Flows: Efficiency and Scale Effects Assessment Open
In this study, the 3D numerical modelling of flow in a pool-type fishway with bottom orifices was performed using computational fluid dynamics (CFD) software (FLOW-3D®). Numerical results were compared with experimental data obtained from …
View article: Evaluation of Low-Head Ramped Weirs for a Potamodromous Cyprinid: Effects of Substrate Addition and Discharge on Fish Passage Performance, Stress and Fatigue
Evaluation of Low-Head Ramped Weirs for a Potamodromous Cyprinid: Effects of Substrate Addition and Discharge on Fish Passage Performance, Stress and Fatigue Open
Requalification of low-head ramped weirs through the addition of substrates (retrofitting) has attracted attention in recent years. However, few studies are available on how this measure affects the negotiation of ramped weirs by fish. Thi…
View article: Multislot Fishway Improves Entrance Performance and Fish Transit Time over Vertical Slots
Multislot Fishway Improves Entrance Performance and Fish Transit Time over Vertical Slots Open
Pool-type fishways have been increasingly tested to improve fish passage performance and minimize migration delays. Designing cost-effective fishways is essential for a trade-off between water uses and successful longitudinal connectivity …
View article: Habitat Use by Pseudochondrostoma duriense and Squalius carolitertii Downstream of a Small-Scale Hydropower Plant
Habitat Use by Pseudochondrostoma duriense and Squalius carolitertii Downstream of a Small-Scale Hydropower Plant Open
Downstream of small-scale hydropower plants (SHPs), the intensity, frequency and persistence of hydropeaking events often cause an intolerable stress on fish of all life stages. Rapid increases in flow velocity result in fish avoiding unst…
View article: The public's perception of run-of-the-river hydropower across Europe
The public's perception of run-of-the-river hydropower across Europe Open
A large share of future European hydropower projects will be run-of-the-river schemes. To understand the potential for RoR hydropower development and modernization of the technology as an opportunity for sustainable decentralization, we us…
View article: Cover or Velocity: What Triggers Iberian Barbel (Luciobarbus Bocagei) Refuge Selection under Experimental Hydropeaking Conditions?
Cover or Velocity: What Triggers Iberian Barbel (Luciobarbus Bocagei) Refuge Selection under Experimental Hydropeaking Conditions? Open
The rapid river flow variations due to hydropower production during peak demand periods, known as hydropeaking, causes several ecological impacts. In this study, we assessed the potential of an overhead cover and velocity-refuge structure …
View article: Habitat Enhancement Solutions for Iberian Cyprinids Affected by Hydropeaking: Insights from Flume Research
Habitat Enhancement Solutions for Iberian Cyprinids Affected by Hydropeaking: Insights from Flume Research Open
Due to peak electricity demand, hydropeaking introduces rapid and artificial flow fluctuations in the receiving river, which alters the river hydromorphology, while affecting the downstream ecological integrity. The impacts of hydropeaking…
View article: Assessment of Retrofitted Ramped Weirs to Improve Passage of Potamodromous Fish
Assessment of Retrofitted Ramped Weirs to Improve Passage of Potamodromous Fish Open
The addition of substrates to small instream obstacles, like low-head ramped weirs, has been considered a useful management solution to retrofit those structures and enhance fish passage. Substrate dimensions and spatial arrangement, toget…
View article: Passage Performance of Potamodromous Cyprinids over an Experimental Low-Head Ramped Weir: The Effect of Ramp Length and Slope
Passage Performance of Potamodromous Cyprinids over an Experimental Low-Head Ramped Weir: The Effect of Ramp Length and Slope Open
Low-head ramped weirs are a common instream obstacle to fish movements. Fish passability of these structures, where water passes over but does not generate a waterfall, is primarily related to ramp length and slope, but their relative cont…
View article: Fish under pressure: Examining behavioural responses of Iberian barbel under simulated hydropeaking with instream structures
Fish under pressure: Examining behavioural responses of Iberian barbel under simulated hydropeaking with instream structures Open
Hydropeaking is the rapid change in the water flow downstream of a hydropower plant, driven by changes in daily electricity demand. These fluctuations may produce negative effects in freshwater fish. To minimize these impacts, previous stu…