Article
Environmental Sciences
Andrew S. Vowles, Paul S. Kemp
Summary: Artificial light at night (ALAN) is a pervasive form of environmental pollution that can negatively impact the critically endangered European eel. This study found that European eels exposed to high levels of ALAN were more likely to reject illuminated routes, less likely to choose illuminated channels when given a choice, and moved downstream more rapidly when selecting the illuminated route. These findings provide a basis for future research and highlight the ecological impacts of ALAN as a significant environmental pollutant.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Satish Kumar Koushlesh, Canciyal Johnson, Uttam Kumar Sarkar, Archan Kanti Das, Basanta Kumar Das, Lianthuamluaia Lianthuamluaia, Mishal Puthiyottil, Bablu Kumar Naskar
Summary: This study aims to understand the spatio-temporal dynamics in habitat ecology and fish assemblage in a riverine-reservoir cascade system and determine the relationship of habitat transition and fish distribution. The study reveals the fish diversity in the river stretch and interface region, as well as the correlation between environmental variables and fish abundance. Furthermore, science-based management recommendations are provided for fisheries enhancement and sustainable management of tropical large reservoirs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Fisheries
Olvin Alior van Keeken, Ralf van Hal, Hendrik Volken Winter, Tony Wilkes, Arie Benjamin Griffioen
Summary: The study found that most European eels passing through pumping stations in Friesland, the Netherlands, pass the stations within a day, while a few eels may stay for several weeks. Prioritizing pumping stations based on degree of blockage, mortality rates, and importance for migratory fish can maximize the effectiveness of measures and mitigation taken to protect the migrating population.
FISHERIES MANAGEMENT AND ECOLOGY
(2021)
Article
Water Resources
Yujuan Mo, Hang Wan, Yanpeng Cai, Xiaodong Zhang, Ran Li, Yongyang Wang
Summary: By establishing an eco-friendly reservoir operation model, the study aims to reduce the supersaturated total dissolved gas (TDG) level and increase reservoir flow velocity in order to restore fish migration pathways.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Environmental Sciences
Billy Nzau Matondo, Jean-Philippe Benitez, Arnaud Dierckx, Severine Renardy, Xavier Rollin, Dylan Colson, Loic Baltus, Vasthi Rose Myrielle Romain, Michael Ovidio
Summary: The study examined the fitness of restocked European eel in six upland rivers and found significant differences in total length, condition factor, and density among the rivers. It was observed that a eutrophic alkaline river with greater roughness of riverbed substrates showed better performance in eel yield variables. Conductivity and total hardness were strongly associated with increased eel density.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Pranaya Kumar Parida, Lianthuamluaia, Tania Kayal, Basanta Kumar Das, Uttam Kumar Sarkar, Satish Kumar Koushlesh, Bijay Kumar Behera
Summary: GIS plays a crucial role in assessing, monitoring, and managing open water resources for fisheries in India, where reservoir fisheries development is a key program. The study on Hirakud reservoir in Odisha revealed seasonal variations in water quality parameters and a decline in fish diversity, with some species being vulnerable. Using the ARIMA model, an increasing trend in fish production was forecasted, suggesting measures like habitat protection and community participation for sustainable enhancement of fish production in the reservoir.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Joachim Pander, Christoffer Nagel, Juergen Geist
Summary: Fish passes play a crucial role in facilitating fish movement and providing important habitat functions. This study found differences in fish community structures between fluvial habitats and floodplain ponds within fish passes, with the latter serving as important juvenile habitats during summer. The integration of diverse habitat structures, such as constructed floodplain ponds, into fish passes can greatly enhance fish communities and contribute to the restoration of declining target species.
Article
Fisheries
Mehis Rohtla, Maidu Silm, Jouni Tulonen, Paarn Paiste, Hakan Wickstrom, Melanie Kielman-Schmitt, Ellen Kooijman, Vaino Vaino, Redik Eschbaum, Lauri Saks, Aare Verliin, Markus Vetemaa
Summary: The study investigates the origin of eels caught in coastal waters of Estonia and Finland, as well as estimating the restocked eel escapement from Narva River Basin District. Results show that only a small percentage of coastally captured eels were originally restocked to NRBD, suggesting restocking eels to freshwaters may be ineffective, and restocking eels to coastal waters directly connected to the sea may be more successful.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Fisheries
Roman Lyach
Summary: This study analyzed the effects of minimum legal angling size, eel stocking, fishing effort, and environmental and biological factors on eel yield. The results showed that an increased minimum legal angling size led to decreased eel yield and a lower percentage of eel in the overall fish harvested. The eel yield was strongly correlated to fishing effort.
Article
Green & Sustainable Science & Technology
Ruben van Treeck, Johannes Radinger, Richard A. A. Noble, Franz Geiger, Christian Wolter
Summary: Hydroelectricity is crucial for decarbonizing global energy production, but it poses threats to rivers and fish populations. The European Fish Hazard Index serves as an assessment tool to evaluate the risks of hydropower plants on fish species, aiding in mitigating their impact on fish populations.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Fisheries
Eamonn S. Lenihan, T. Kieran McCarthy, Colin Lawton
Summary: Riverine dams and weirs provide silver eels with multiple migration routes during their downstream migrations, and understanding route selection is crucial for estimating silver eel escapement. Research on a water-regulating weir on the lower River Shannon in Ireland revealed that eel route selection was passive and influenced by the proportion of flow diverted to each route. Eels exhibited slow swimming speeds, primarily being carried by the current, which suggests potential for strategically altering hydropower-generating protocols to enhance silver eel passage via safer routes and improve survival rates.
MARINE AND FRESHWATER RESEARCH
(2021)
Article
Environmental Sciences
Francisco Javier Bravo-Cordoba, Ana Garcia-Vega, Juan Francisco Fuentes-Perez, Leandro Fernandes-Celestino, Sergio Makrakis, Francisco Javier Sanz-Ronda
Summary: Most freshwater fish require unobstructed river movements to complete their life cycles. This study investigated bidirectional movements through a small run-of-the-river hydropower plant with a fishway, focusing on the Iberian barbel as the target species. The results showed diverse fish movements and supported the use of fishways as a mitigation tool for small hydropower facilities.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2023)
Article
Marine & Freshwater Biology
Marta Rodriguez-Rey, Benjamin Whittaker
Summary: The environmental factors shaping the ecological niche of lumpfish at a global scale are not well-understood. Through Species Distribution Models, we found that nitrate concentration, ice cover, diffuse attenuation, and temperature predicted the probability of lumpfish occurrence. As sea temperatures rise under climate change, the distribution of lumpfish is expected to shift northward, affecting fisheries and conservation efforts.
Article
Environmental Sciences
David M. Norris, Michael E. Colvin, Leandro E. Miranda, Marcus A. Lashley
Summary: Environmental management often involves decision-making under uncertainty, such as the case of planting mudflats as supplemental fish habitat in flood control reservoirs. Different reservoirs have varying optimal planting decisions depending on elevation contours. The study provides a quantified basis for establishing best management practices.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Arie Benjamin Griffioen, Olvin Alior van Keeken, Alicia Lianne Hamer, Hendrik Volken Winter
Summary: The passage success of sea lampreys and their behavior in the vicinity of man-made structures like marine-freshwater barriers are not well understood. A study in the Netherlands used acoustic transmitters to track 25 sea lampreys and found that passage success was low, with most sea lampreys showing exploratory searching behavior before leaving the area when unsuccessful.
RIVER RESEARCH AND APPLICATIONS
(2022)
Article
Environmental Sciences
Nils Teichert, Bastien Bourillon, Kyoko Suzuki, Anthony Acou, Alexandre Carpentier, Mari Kuroki, David Righton, Thomas Trancart, Laure-Sarah Virag, Alan Walker, Tsuguo Otake, Eric Feunteun
Summary: Eels exhibit a high level of phenotypic plasticity in response to biogeographical drivers and local conditions. This study provides a biogeographical snapshot of eel life-history traits, showing geographical and salinity variations. Eels grow faster and migrate earlier in southern Europe, suggesting local growth conditions play a larger role in silvering process than fish age. Eels with a brackish life-history grow faster, reach larger size-at-age, and have better condition, indicating the importance of brackish areas for eel production. However, a large proportion of the variation in life-history traits remains unexplained, implying other drivers at the catchment scale.
Review
Oceanography
Sophie A. M. Elliott, Anthony Acou, Laurent Beaulaton, Jerome Guitton, Elodie Reveillac, Etienne Rivot
Summary: Anthropogenic pressures have negatively impacted diadromous fish, especially those of commercial importance. Limited knowledge exists regarding their marine life history and distribution at sea. This study utilizes fisheries data to model the distribution and assess conservation measures for diadromous fish species.
PROGRESS IN OCEANOGRAPHY
(2023)
Article
Environmental Sciences
Nils Teichert, Anne Lize, Henrique Cabral, Anthony Acou, Thomas Trancart, Laure-Sarah Virag, Eric Feunteun, Alexandre Carpentier
Summary: The expression of life-history traits in fish is influenced by both current and past environmental conditions. This study investigates the effects of carry-over from larval traits and environmental conditions on the life-history traits of European seabass using otolith microstructure analysis. The results show that larval traits have a minor impact compared to the nursery environment on post-settlement traits.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Sophie A. M. Elliott, Noemie Deleys, Laurent Beaulaton, Etienne Rivot, Elodie Reveillac, Anthony Acou
Summary: This article presents a database of fish data in the eastern Atlantic region, covering the period from 1965 to 2019. The database includes 168,904 hauls from 46 surveys, consisting of both fisheries-dependent and-independent data. By cleaning and standardizing the data, it can contribute to improving conservation efforts and modeling techniques for data-poor diadromous fish species.
Article
Geosciences, Multidisciplinary
Viviane David, Anne Mouget, Pierre Thiriet, Corentin Minart, Yannick Perrot, Loic Le Goff, Olivier Bianchimani, Solene Basthard-Bogain, Tristan Estaque, Justine Richaume, Jean-Francois Sys, Adrien Cheminee, Eric Feunteun, Anthony Acou, Patrice Brehmer
Summary: Scientists combined split-beam and multibeam echosounders to detect and classify different fish species, and found that acoustic data significantly improved the accuracy of species classification. These acoustic methods have important implications for marine management and decision-making.
JOURNAL OF MARINE SYSTEMS
(2024)
Proceedings Paper
Environmental Sciences
Quentin Ternon, Antoine Collin, Eric Feunteun, Frederic Ysnel, Valentin Danet, Manon Guillaume, Pierre Thiriet
EUROPEAN SPATIAL DATA FOR COASTAL AND MARINE REMOTE SENSING, EUCOMARE 2022
(2023)
Article
Fisheries
Bastien Bourillon, Eric Feunteun, Anthony Acou, Thomas Trancart, Nils Teichert, Claude Belpaire, Sylvie Dufour, Paco Bustamante, Kim Aarestrup, Alan Walker, David Righton
Summary: This paper investigates the impact of sublethal chemical contamination on the expression of life history traits and related fitness of the critically endangered European eel. The study proposes a modeling approach to quantify the effects of anthropogenic pollutants on the eels. The results suggest that reducing pollutant concentrations could significantly improve the eels' fecundity.
Article
Biodiversity Conservation
Alfonso Balmori
Summary: This article discusses the potential negative effects of radio tagging on wild animals. While it is a valuable technique for gathering information, it is important to be aware of and study the possible issues it may cause to ensure the well-being of the animals.
JOURNAL FOR NATURE CONSERVATION
(2024)
Article
Biodiversity Conservation
D. F. Castillo, N. C. Caruso
Summary: Understanding the distribution and ecological niche of hog-nosed skunks is crucial for their conservation. This study used species occurrence records and environmental variables to estimate suitable areas and key factors influencing their distribution. The results showed that temperature and tree presence are important variables. Additionally, areas of high habitat suitability for hog-nosed skunks are underrepresented in protected areas.
JOURNAL FOR NATURE CONSERVATION
(2024)