Article
Chemistry, Multidisciplinary
Celine Artero, Simon Marchetti, Eric Bauer, Christophe Viala, Claire Noel, Christopher Koenig, Rachel Berzins, Luis Lampert
Summary: Monitoring fish species populations in very turbid environments is challenging, but acoustic cameras can help overcome this difficulty. By assessing total abundance, size structure, and spatial distribution of fish populations, acoustic cameras provide more accurate data through a combination of mobile and stationary surveys.
APPLIED SCIENCES-BASEL
(2021)
Review
Multidisciplinary Sciences
Hugo Flavio, Rochelle Seitz, David Eggleston, Jon C. Svendsen, Josianne Stottrup
Summary: This study systematically reviewed the relationships between hard-bottom habitats and commercially harvested species, indicating that these habitats have positive effects on fish reproduction and biomass, especially for cod and herring.
Article
Ecology
R. M. Connolly, K. Jinks, A. Shand, M. D. Taylor, T. F. Gaston, A. Becker, E. L. Jinks
Summary: This study uses deep learning to process and analyze acoustic data and proposes an automated underwater acoustic data analysis tool that can accurately detect and count fish populations with high reliability and accuracy. In future research, it is suggested to expand the testing range and automate species identification and counts.
Article
Engineering, Marine
Garrett J. Staines, Robert P. Mueller, Andrew C. Seitz, Mark D. Evans, Patrick W. O'Byrne, Martin Wosnik
Summary: A study tested the use of acoustic cameras to monitor the interaction between current energy converters (CECs) and fish. The results showed that the cameras were able to detect targets and observe blade strikes in turbid water. However, the difficulty of distinguishing small fish from debris in high-energy turbid rivers remains a limitation of this technology.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Mechanical
Chan Il Park
Summary: This study explored the noise characteristics and acoustic design sensitivity of a helical gear system as a model of a wind turbine gearbox. The study found that the gear force and sound pressure level of the gear system fluctuated in a fixed speed wind turbine. The sound pressure level was highly influenced by the first harmonic component of the gear force. The study also found that the sound pressure level was higher in frequency ranges for magnesium plates compared to aluminum and steel plates. Additionally, increasing the helix angle increased the shaft force and decreased the mesh stiffness, natural frequency, gear displacement peaks, and sound pressure level. The study proposed an analytically validated acoustic design sensitivity for the helical gear system.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Sander Lagerveld, Tony Wilkes, Marinka E. B. van Puijenbroek, Bart C. A. Noort, Steve C. V. Geelhoed
Summary: Seasonal movements between summer and winter areas are common in bats, but there is limited scientific knowledge on sea migration. This study used continuous ultrasonic acoustic monitoring to analyze the migration patterns of Nathusius' pipistrelle in the southern North Sea during autumn. The results showed clear spatiotemporal patterns, with peak migration occurring from mid-August to late October and most bats found near the Noord Holland coast. The study also identified wind direction, lunar phase, and offshore structures as factors influencing migration behavior.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Multidisciplinary Sciences
Eva Garcia-Seoane, Thor Klevjer, Kjell Arne Mork, Mette Dalgaard Agersted, Gavin J. J. Macaulay, Webjorn Melle
Summary: This study investigated the large-scale distribution patterns of the acoustic scattering layers and micronekton density in the Northeast Atlantic Ocean during daylight hours, revealing clear horizontal distribution patterns with higher backscatter in the south and absence of high backscatter in the north. Acoustic observations indicated that backscatter and echo densities were significantly influenced by temperature, salinity, oxygen, depth, and time of the day.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Eva Garcia-Seoane, Thor Klevjer, Kjell Arne Mork, Mette Dalgaard Agersted, Gavin J. Macaulay, Webjorn Melle
Summary: This study investigated the large-scale distribution patterns of acoustic scattering layers and micronekton density in the Northeast Atlantic Ocean during daylight hours. The research utilized hydrological data and acoustic observations to analyze the horizontal distribution of micronekton, finding distinct patterns influenced by factors such as temperature, salinity, oxygen, depth, and time.
SCIENTIFIC REPORTS
(2023)
Article
Fisheries
Francois Martignac, Jean-Luc Bagliniere, Dominique Ombredane, Jean Guillard
Summary: This study aims to assess the effectiveness of Sonar5-Pro for detecting and describing fish passages in a high fish diversity river in low flow conditions. The tool's accuracy was evaluated by comparing Sonar5-Pro outputs with manual analysis, showing it successfully detects fish moving into the detection beam and has a certain level of efficiency in detecting fish swimming direction.
AQUATIC LIVING RESOURCES
(2021)
Article
Biodiversity Conservation
Inge van der Knaap, Hans Slabbekoorn, Hendrik Winter, Tom Moens, Jan Reubens
Summary: Excluding data from single receivers allows for evaluation of receiver setup suitability for target species movement patterns, and careful handling of data can reduce potential biases in acoustic positional telemetry studies.
ANIMAL BIOTELEMETRY
(2021)
Article
Biodiversity Conservation
Bobbi J. Estabrook, Jamey T. Tielens, Ashakur Rahaman, Dimitri W. Ponirakis, Christopher W. Clark, Aaron N. Rice
Summary: As offshore wind energy areas (WEAs) continue to develop along the US Atlantic coast, there is a growing concern for the potential conflict with vulnerable wildlife, such as the Critically Endangered North Atlantic right whales (NARWs). This study focuses on assessing the impact of construction and operational activities on NARWs, taking into account their spatial, temporal, and acoustic overlaps. The research highlights the importance of baseline distribution data and data-driven policies to guide management decisions and minimize risks. The results show the variability of NARW occurrence patterns within and near the Massachusetts and Rhode Island-Massachusetts Offshore WEAs and emphasize the influence of existing noise conditions on NARW communication and detectability.
ENDANGERED SPECIES RESEARCH
(2022)
Article
Zoology
Maria Eduarda Gomes Guedes, Tiago Gabriel Correia
Summary: This study applied different biomarkers to males and females of Anableps anableps to analyze their physiological differences in different seasons. The results showed that males and females exhibited differences in biomass, metabolism, and blood biochemical indicators in different seasons, suggesting a seasonal asynchronism in the allocation of energy resources at different times of their life cycle.
NEOTROPICAL ICHTHYOLOGY
(2021)
Article
Fisheries
Kevin Mack, Holly White, Fred C. Rohde
Summary: Research indicates that in the Albemarle Sound in North Carolina, the Chowan River and its tributaries serve as the major spawning rivers for American Shad.
NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT
(2021)
Article
Marine & Freshwater Biology
Ralf van Hal, Tobias van Kooten, Adriaan D. Rijnsdorp
JOURNAL OF SEA RESEARCH
(2016)
Article
Marine & Freshwater Biology
Maarten F. de Jong, Martin J. Baptist, Ralf van Hal, Ingeborg J. de Boois, Han J. Lindeboom, Piet Hoekstra
ESTUARINE COASTAL AND SHELF SCIENCE
(2014)
Article
Biodiversity Conservation
Lorna R. Teal, Ralf van Hal, Tobias van Kooten, Piet Ruardij, Adriaan D. Rijnsdorp
GLOBAL CHANGE BIOLOGY
(2012)
Article
Marine & Freshwater Biology
Doug Beare, Adriaan D. Rijnsdorp, Mette Blaesberg, Ulrich Damm, Josefine Egekvist, Heino Fock, Matthias Kloppmann, Christine Rockmann, Alexander Schroeder, Torsten Schulze, Ingrid Tulp, Clara Ulrich, Ralf van Hal, Tobias van Kooten, Marieke Verweij
JOURNAL OF SEA RESEARCH
(2013)
Article
Multidisciplinary Sciences
Loes J. Bolle, Christ A. F. de Jong, Stijn M. Bierman, Pieter J. G. van Beek, Olvin A. van Keeken, Peter W. Wessels, Cindy J. G. van Damme, Hendrik V. Winter, Dick de Haan, Rene P. A. Dekeling
Article
Fisheries
Daniel Oesterwind, Bianca T. C. Bobowski, Anika Brunsch, Vladimir Laptikhovsky, Ralf van Hal, Anne F. Sell, Graham J. Pierce
FISHERIES RESEARCH
(2020)
Article
Fisheries
Olvin Alior van Keeken, Ralf van Hal, Hendrik Volken Winter, Ingrid Tulp, Arie Benjamin Griffioen
FISHERIES MANAGEMENT AND ECOLOGY
(2020)
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
Multidisciplinary Sciences
Hendrik Volken Winter, Olvin Alior M. van Keeken, Frank M. Kleissen, Edwin Matheus M. Foekema
Summary: This study investigated the behavioral responses and blocking effect of sewage treatment plant effluent plumes on the downstream migration of silver eels in the Eems canal in the Netherlands. 59% of the silver eels showed avoidance responses when confronted with the effluent plume, and 86% of them eventually passed the study site. The variation in discharge volumes and flow velocity allowed for migratory windows where silver eels could pass while avoiding direct contact with the plume.
Article
Environmental Sciences
Olvin Alior van Keeken, Arie Benjamin Griffioen, Nicola Stella Henriette Tien, Hendrik Volken Winter
Summary: Habitat fragmentation and migration barriers have led to the decline of European eel population. A study was conducted to investigate the migration patterns of silver eels in the North Sea Canal basin using acoustic telemetry and mark-recapture methods. It was found that 55% of silver eels passed barriers between polders and canals, and 46% passed the barrier complex at IJmuiden to reach the sea. Silver eel escapement to the North Sea averaged 81,629 individuals per year, with 14.3% mortality at the pumping station in IJmuiden. The study highlighted the importance of addressing barriers and implementing mitigation measures for eel management.
RIVER RESEARCH AND APPLICATIONS
(2023)
Article
Ecology
Casper H. A. van Leeuwen, Joep J. de Leeuw, Olvin A. van Keeken, Joey J. J. Volwater, Ferdi Seljee, Roland van Aalderen, Willie A. M. van Emmerik, Elisabeth S. Bakker
Summary: The construction of islands and deep sand excavations in Lake Markermeer in the Netherlands has attracted omnivorous and piscivorous fish species, providing new habitats for reproduction and nursery. The piscivorous fish species have become permanent residents.
Article
Environmental Studies
Samuel Shephard, Ralf van Hal, Ingeborg de Boois, Silvana N. R. Birchenough, Jo Foden, Joey O'Connor, Steve C. V. Geelhoed, Gert Van Hoey, Francisco Marco-Rius, David G. Reid, Matthias Schaber
Article
Environmental Sciences
Emily Curren, Sandric Chee Yew Leong
Summary: Microplastics in marine ecosystems serve as microhabitats for diverse toxic plankton species, including viable resting cysts of dinoflagellates. The diversity of plankton communities on the plastisphere is influenced by anthropogenic factors. This study highlights the importance of plastics as vectors for the transport of harmful opportunistic species in the marine environment.
MARINE ENVIRONMENTAL RESEARCH
(2024)
Article
Environmental Sciences
Vladimir G. Dvoretsky, Alexander G. Dvoretsky
Summary: The Barents Sea, as the largest Arctic shelf region, plays a vital role in supporting commercial fisheries. The ecosystem of this region is significantly influenced by both warm Atlantic Water (AW) and cold Arctic Water (ARW), resulting in distinct frontal zones. This study found that copepod populations, particularly herbivorous copepods, were most abundant and productive in the Polar Front, as well as in the eastern frontal zones. The geographic positions of sampling stations, depth, and chlorophyll a concentration were identified as the main factors influencing copepod biomass and production.
MARINE ENVIRONMENTAL RESEARCH
(2024)
Article
Environmental Sciences
Alberto Rovellini, Charlotte L. Mortimer, Matthew R. Dunn, Elizabeth A. Fulton, Jamaluddin Jompa, Abdul Haris, James J. Bell
Summary: This study compared the structural complexity of coral- and sponge-dominated areas of an Indonesian coral reef using 3D photogrammetry. The results showed that smaller-scale refugia were reduced in sponge-dominated reefs, potentially impacting smaller reef fauna.
MARINE ENVIRONMENTAL RESEARCH
(2024)