Article
Fisheries
Giovanni Bearzi, Randall R. Reeves
Summary: Some marine mammals have modified their behavior to take advantage of the opportunities provided by fishing, leading to interactions that involve removing or damaging marketable organisms and bait. The use of the term "depredation" when referring to this behavior could reinforce misunderstandings and the belief that marine resources belong solely to humans. Alternative wording would prevent ambiguity and acknowledge the ecological roles of large marine predators.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Engineering, Marine
Carolyn D. Ruppel, Thomas C. Weber, Erica R. Staaterman, Stanley J. Labak, Patrick E. Hart
Summary: This study describes the quantitative factors that affect marine species in addition to received sound levels, divides marine acoustic sources into four tiers based on physical criteria, and provides evaluation methods.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Ecology
Rebecca V. Van Hoeck, Avery B. Paxton, DelWayne R. Bohnenstiehl, J. Christopher Taylor, F. Joel Fodrie, Charles H. Peterson
Summary: By comparing the soundscape and community development of two artificial reefs, passive acoustic monitoring was shown to be an effective complement to traditional monitoring methods, providing a more comprehensive view of community development.
Article
Engineering, Marine
Matteo Sanguineti, Carlo Guidi, Vladimir Kulikovskiy, Mauro Gino Taiuti
Summary: Passive acoustic monitoring of cetaceans provides unique behavioral information at great depths and long ranges, but real-time data collection, transfer, and analysis are challenging. Two methods include hydrophone systems under buoys for wireless data transmission and acoustic detector networks integrated within submarine neutrino telescopes.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Guillaume Chandelier, Jeremy J. Kiszka, Violaine Dulau-Drouot, Claire Jean, Thomas Poirout, Vanessa Estrade, Mathieu Barret, Jacques Fayan, Sebastien Jaquemet
Summary: Tropical oceans with oligotrophic eco-systems often have oceanic islands that favor the aggregation of species and biomass. The waters surrounding La Reunion in the Southwest Indian Ocean host a diverse range of marine species, including seabirds, pelagic teleosts, elasmobranchs, delphinids, and sea turtles. Stable isotope analysis reveals that these species have different trophic roles and utilize multiple foraging habitats. The findings highlight the mechanisms that limit competition and the importance of understanding the structure of marine vertebrate communities.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Physics, Multidisciplinary
Xianghao Hou, Jianbo Zhou, Yixin Yang, Long Yang, Gang Qiao
Summary: This paper presents a solution for the 3D passive underwater uncooperative target tracking problem in a time-varying non-Gaussian environment, using a distributed passive underwater buoys observing system and an adaptive particle filter to overcome the low observability drawback and achieve good results.
Article
Multidisciplinary Sciences
Gianpiero Russo, Marco Valerio Nicotera
Summary: This paper discusses the issue of soil movements around deep excavations in urban environments and presents various methods for predicting ground movements. It reviews existing 2D semi-empirical methods and modifies and combines them to develop a new 3D analytical description of the subsidence trough. The proposed method is validated through numerical simulations and real case studies in sand, demonstrating its effectiveness.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Marine
Jie Lin, Dong-Sheng Jeng, Hongyi Zhao, Yuan Gao, Junwei Liu, Yakun Guo
Summary: This paper reviews the recent research progress on seabed liquefaction around marine structures under the combined wave and current loading. Two main research approaches are described, followed by a detailed discussion on two available liquefaction mechanisms and criteria. The development of wave and current-induced seabed liquefaction around marine structures is then presented. Furthermore, recently developed protection measures for structures and their surrounding seabed are summarized, and several future research perspectives are suggested.
Article
Environmental Sciences
Clinton Factheu, Athena M. M. Rycyk, Sevilor Kekeunou, Lucy W. W. Keith-Diagne, Eric A. A. Ramos, Mumi Kikuchi, Aristide Takoukam Kamla
Summary: The African manatee is a hard-to-detect, data-deficient, and endangered species that lives in marine and freshwater systems in Western and Central Africa. Traditional visual surveys have difficulty in detecting this species. The invasion of Giant Salvinia further limits their detectability, impacting their movements and habitat. In order to assess detection methods, vessel surveys were conducted in Lake Ossa, Cameroon using visual point scans, 360 degrees sonar scans, and passive acoustic monitoring. Passive acoustics proved to be the most successful method, followed by sonar scans and visual point scans. Water depth and transparency significantly influenced manatee detection likelihood. Passive acoustic methods are recommended for future surveys to enhance African manatee detections.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Civil
Huidong Li, Zhiqun Daniel Deng, Jun Lu, Jayson J. Martinez, Bingbin Wu, Xiaoqin Zang
Summary: Most marine renewable energy (MRE) technologies are still in their infancy and face uncertainties in terms of their impacts on the marine environment and species. Current monitoring technologies for marine animals' behavior have limitations in identifying and studying individual animals. A new miniaturized acoustic transmitter has been developed with improved signal strength and service life, as well as increased detection range. Evaluation of the transmitter's performance and field testing results are presented.
IEEE JOURNAL OF OCEANIC ENGINEERING
(2023)
Article
Biodiversity Conservation
Lucille Chapuis, Ben Williams, Timothy A. C. Gordon, Stephen D. Simpson
Summary: The study evaluated the performance of two models of GoPro underwater action cameras as PAM recorders, finding that they can reliably capture underwater acoustic recordings. Although not directly comparable with hydrophone-derived values, metrics derived from GoPros can be valuably compared between recordings taken using the same model.
ECOLOGICAL INDICATORS
(2021)
Article
Cell Biology
Cristiana Bersaglieri, Raffaella Santoro
Summary: The nucleolus is an important subcompartment in the nucleus responsible for ribosome biogenesis. Recent studies have shown that it also plays a role in organizing the chromosomes in the nucleus. These genomic domains, called nucleolar associated domains (NADs), are characterized by repressive chromatin states. However, accurate identification of NADs has been challenging due to the lack of a membrane.
CURRENT OPINION IN CELL BIOLOGY
(2023)
Review
Acoustics
Audrey Looby, Santiago Bravo, Francis Juanes, Rodney Rountree, Amalis Riera, Hailey L. Davies, Brittnie Spriel, Sarah Vela, Laura K. Reynolds, Charles W. Martin, Kieran Cox
Summary: This study systematically reviewed the prevalence of acoustic behaviors in marine, subtropical fishes and the factors influencing their pervasiveness. The most common behavioral context associated with active sound production was disturbance, followed by aggression and reproduction. The reporting of sound production behaviors varied depending on the study environment and fish family.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Chemistry, Analytical
Jaya Shradha Fowdur, Marcus Baum, Frank Heymann
Summary: As autonomous navigation is increasingly utilized, the study emphasizes the importance of robust tracking in maritime traffic. Three marine radar datasets are provided for target detection and tracking research, along with a novel algorithm for multiple target tracking based on centroid. Performance comparison with a standard version and dataset-specific analysis are presented. The datasets are available under DLR's terms and agreements.
Article
Biology
Erica Fleishman, Danielle Cholewiak, Douglas Gillespie, Tyler Helble, Holger Klinck, Eva-Marie Nosal, Marie A. Roch
Summary: Monitoring based on sound recordings can provide valuable data for estimating ecological metrics at both individual and community levels in marine ecosystems. However, the reliability and feasibility of passive acoustic monitoring vary depending on various factors, and collaborations between researchers from different fields are crucial to improve the accuracy and applicability of these methods.
BIOLOGICAL REVIEWS
(2023)
Article
Biology
Ilias Foskolos, Michael Bjerre Pedersen, Kristian Beedholm, Astrid Sormark Uebel, Jamie Macaulay, Laura Stidsholt, Signe Brinklov, Peter Teglberg Madsen
Summary: This study found that bats are able to maintain adequate echo-to-noise ratios for prey hunting by increasing call amplitude, even when they cannot avoid masking spectrally, spatially or temporally.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Ecology
Jamie Macaulay, Al Kingston, Alex Coram, Michael Oswald, Rene Swift, Doug Gillespie, Simon Northridge
Summary: A passive acoustic monitoring system was developed to track the behavior of harbour porpoises around fishing nets. By localizing their acoustic clicks, highly detailed 3D movement data can be obtained. The study revealed various behaviors of harbour porpoises in proximity to nets, including active foraging.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
Charlotte R. Findlay, Gordon D. Hastie, Adrian Farcas, Nathan D. Merchant, Denise Risch, Ben Wilson
Summary: Pinniped depredation at aquaculture sites is a global problem. Acoustic deterrent devices (ADDs) are used to mitigate this problem, but it is unclear whether the sound emissions from ADDs can also impact non-target pinnipeds. This study used GPS tracking data and modeled maps of ADD noise to assess the sound exposure and potential auditory impairment of harbour seals. The results showed that harbour seals off the west coast of Scotland are routinely exposed to ADD noise exceeding ambient sound levels, and this chronic exposure may have negative consequences for the population. Therefore, caution should be exercised when using ADDs to minimize unintended impacts on non-target species.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Correction
Biology
Ilias Foskolos, Michael Bjerre Pedersen, Kristian Beedholm, Astrid Saermark Uebel, Jamie Macaulay, Laura Stidsholt, Signe Brinklov, Peter Teglberg Madsen
JOURNAL OF EXPERIMENTAL BIOLOGY
(2022)
Article
Environmental Sciences
Douglas Gillespie, Michael Oswald, Gordon Hastie, Carol Sparling
Summary: This article reports on the design and performance of a seabed mounted sensor platform for monitoring the fine scale movements of cetaceans and pinnipeds around operational tidal turbines. The system uses high-frequency multibeam active sonars for tracking animals in the horizontal plane and offsetting the vertical angle of the sonars to resolve a vertical component. It also utilizes hydrophones for measuring angles to cetacean echolocation clicks. The system proved highly reliable during field tests and will be deployed close to an operational turbine.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Ecology
Thomas Webber, Douglas Gillespie, Timothy Lewis, Jonathan Gordon, Tararak Ruchirabha, Kirsten F. Thompson
Summary: Passive acoustic surveys are popular for surveying marine species, but data analysis is time-consuming and expensive. Researchers have developed a semi-automatic workflow to reduce the time and cost for analysts.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Ecology
Kaitlin J. Palmer, Sam Tabbutt, Douglas Gillespie, Jesse Turner, Paul King, Dominic Tollit, Jessica Thompson, Jason Wood
Summary: There is significant support for offshore wind development in US waters, but some planned sites overlap with critical habitat for endangered right whales. In order to manage the interactions between marine mammals and human activities, exclusion zones and passive acoustic monitoring are important tools. Researchers have developed a three-hydrophone system that provides real-time information about the location of marine mammals with respect to exclusion zones. Field trials showed that the system can effectively monitor exclusion zones and improve false alarm rates.
METHODS IN ECOLOGY AND EVOLUTION
(2022)
Article
Acoustics
Peter C. Conant, Pu Li, Xiaobai Liu, Holger Klinck, Erica Fleishman, Douglas Gillespie, Eva-Marie Nosal, Marie A. Roch
Summary: This work presents an open-source Matlab software package for extracting tonal signals from large acoustic data sets, and incorporates a whistle extraction algorithm into an established software package for cetacean tonal calls. The algorithm performs well on challenging species subsets and shows good generalization to new data.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
E. G. Longden, D. Gillespie, D. A. Mann, K. A. McHugh, A. M. Rycyk, R. S. Wells, P. L. Tyack
Summary: This study analyzed the changes in vessel activity and soundscape during the COVID-19 pandemic in Sarasota Bay and its impact on bottlenose dolphins. The results showed an increase in vessel activity and a decrease in dolphin whistle detection during the pandemic, indicating that the effects of the pandemic on wildlife are not consistent across different regions.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Biology
Erica Fleishman, Danielle Cholewiak, Douglas Gillespie, Tyler Helble, Holger Klinck, Eva-Marie Nosal, Marie A. Roch
Summary: Monitoring based on sound recordings can provide valuable data for estimating ecological metrics at both individual and community levels in marine ecosystems. However, the reliability and feasibility of passive acoustic monitoring vary depending on various factors, and collaborations between researchers from different fields are crucial to improve the accuracy and applicability of these methods.
BIOLOGICAL REVIEWS
(2023)
Article
Ecology
Signe M. M. Brinklov, Jamie Macaulay, Christian Bergler, Jakob Tougaard, Kristian Beedholm, Morten Elmeros, Peter Teglberg Madsen
Summary: The affordability, storage, and power capacity of compact modern recording hardware have made passive acoustic monitoring (PAM) a non-invasive, cost-effective tool for research and ecological management. However, there is a need for standardized, user-friendly, and open access automated detection and classification workflows for bats.
METHODS IN ECOLOGY AND EVOLUTION
(2023)
Article
Engineering, Marine
Douglas Gillespie, Gordon Hastie, Jessica Montabaranom, Emma Longden, Katie Rapson, Anhelina Holoborodko, Carol Sparling
Summary: Understanding the behavior of marine animals around tidal turbines is crucial for assessing their impact on individuals and populations. A study using multibeam sonar data near an operational turbine in Scotland identified tracks of marine mammals, fish, and diving birds. The data is being analyzed to study species reactions to turbine rotors and improve automated detection and classification algorithms.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Biology
I. M. Graham, D. Gillespie, K. C. Gkikopoulou, G. D. Hastie, P. M. Thompson
Summary: Mitigation measures to disperse marine mammals prior to pile-driving, such as acoustic deterrent devices and piling soft starts, have uncertain efficacy. However, through the use of portable hydrophone clusters, it has been demonstrated that harbour porpoises respond positively to these measures by swimming away from the sound sources.
