Article
Agriculture, Dairy & Animal Science
Andreia Torres-Pereira, Helder Araujo, Fabio L. Matos, Jorge Bastos-Santos, Sara Sa, Marisa Ferreira, Jose Martinez-Cedeira, Alfredo Lopez, Marina Sequeira, Jose Vingada, Catarina Eira
Summary: The study reveals that the population of Iberian harbour porpoise on the coast of Portugal is small and facing potential threats from accidental fisheries capture. Although the highest estimate was recorded in 2013, the population decreased sharply in the following years. The northern area of Portugal is identified as the most suitable habitat for the porpoises. More assessments are needed to fully understand their spatial and temporal habitat use in the Iberian Peninsula, and urgent threat mitigation measures are required.
Article
Environmental Sciences
Weilun Li, Jiansong Qiu, Peiyu Lei, Xiaohong Chen, Fei Fan, Xiaojun Deng, Yingen Dai, Yanqing Deng, Kexiong Wang, Zhigang Mei
Summary: This study aimed to investigate the activities of Phocoenidae in fresh and coastal waters by recording their echolocation clicks using a real-time passive acoustic monitoring (PAM) system. The developed Real-time Porpoise Click Detector-II (RPCD-II) was deployed under a docked fishing vessel and successfully detected signals of Yangtze finless porpoise in real-time. The results were consistent with another control device, validating the ability of RPCD-II for real-time detection in the field.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Camille Ollier, Ilona Sinn, Oliver Boisseau, Vincent Ridoux, Auriane Virgili
Summary: Estimating the detection probability of small cetaceans, this study focuses on using the Mark-Recapture Distance Sampling (MRDS) methodology to estimate visual, acoustic, and combined detection probability. The results show that passive acoustic monitoring can be used as an independent platform in MRDS to estimate the detection probability. Without correcting for detection biases, total abundance would be underestimated by a factor of two.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Alexandre N. N. Zerbini, Kimberly T. T. Goetz, Karin A. A. Forney, Charlotte Boyd
Summary: This study used distance sampling to estimate the abundance of harbor porpoises in the Southeast Alaska inland waters, and found that bycatch in the drift gillnet fishery may be unsustainable for the southern population. Monitoring the abundance and bycatch is therefore important for evaluating the potential impact of fisheries on this species in Southeast Alaska.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Tobias Schaffeld, Joseph G. Schnitzler, Andreas Ruser, Johannes Baltzer, Max Schuster, Ursula Siebert
Summary: Harbor porpoises from the North Sea periodically enter large rivers like the Elbe or the Weser. Their migration to the port of Hamburg, located 97 km upstream, is believed to be linked to the presence of anadromous prey species. Signals emitted by an acoustic flowmeter in the port, with specific characteristics, have the potential to induce temporary threshold shift (TTS) in harbor porpoise hearing. The study recommends reducing the source levels of the flowmeter to avoid potential effects on harbor porpoises, highlighting the importance of a mandatory authorization process for underwater sound use with potential effects on aquatic life.
FRONTIERS IN MARINE SCIENCE
(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
Dominik A. Nachtsheim, Sacha Viquerat, Nadya C. Ramirez-Martinez, Bianca Unger, Ursula Siebert, Anita Gilles
Summary: The North Sea is heavily impacted by human activities, affecting the abundance of harbor porpoises in the German North Sea. While there is an overall decrease in harbor porpoise abundance over the study period, specific areas like the SAC Sylt Outer Reef are experiencing significant declines, highlighting the need for further investigation and adaptive management in the region.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Biology
Andrew Olaf Shelton, Ana Ramon-Laca, Abigail Wells, Julia Clemons, Dezhang Chu, Blake E. Feist, Ryan P. Kelly, Sandra L. Parker-Stetter, Rebecca Thomas, Krista M. Nichols, Linda Park
Summary: In this study, eDNA sampling was used to estimate the abundance and distribution of Pacific hake along the west coast of the USA, and the results were compared with traditional acoustic-trawl survey. The study shows that eDNA methods can provide valuable information at a management relevant scale, especially in data or resource-limited contexts.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2022)
Article
Environmental Sciences
Melinda L. Rekdahl, Sarah G. Trabue, Carissa D. King-Nolan, Samantha Strindberg, Howard C. Rosenbaum
Summary: This study investigated the spatiotemporal distribution of harbour porpoise in the NY-NJ Harbour Estuary from 2018-2020. The results showed that harbour porpoises were present at low levels year-round, with seasonal peaks in winter to spring (February to June). Sea surface temperature and chlorophyll-a concentration were significant predictors of harbour porpoise presence, but further research is needed to understand this relationship.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Biodiversity Conservation
Slade Allen-Ankins, Donald T. McKnight, Eric J. Nordberg, Sebastian Hoefer, Paul Roe, David M. Watson, Paul G. McDonald, Richard A. Fuller, Lin Schwarzkopf
Summary: Effective monitoring tools are crucial for tracking biodiversity loss and informing management strategies. Passive acoustic monitoring has the potential to be a cheap and effective method for monitoring biodiversity, but extracting useful information from long audio recordings is still difficult.
ECOLOGICAL INDICATORS
(2023)
Article
Biodiversity Conservation
Jericho C. Whiting, Bill Doering, Ken Aho
Summary: Due to white-nose syndrome and wind energy development, monitoring the population fluctuations of bats has become crucial. This study investigated the relationship between recorded acoustic data from bats exiting hibernacula and the number of bats counted in caves. The results showed that passive acoustic data can serve as an index of bat abundance in caves in temperate climate zones.
ECOLOGICAL INDICATORS
(2022)
Article
Multidisciplinary Sciences
Douglas B. Sigourney, Annamaria Deangelis, Danielle Cholewiak, Debra Palka
Summary: Visual line transect (VLT) surveys and passive acoustic monitoring (PAM) are important methods for monitoring and studying marine mammals. This study presents a framework to combine these data streams to estimate abundance and derive an estimate of availability bias. Three methods were evaluated and the results showed that the CMR-DS method was the least biased and most precise.
Article
Marine & Freshwater Biology
Ugur Ozsandikci, Suleyman Ozdemir
Summary: Reliable information on the abundance and distribution of cetaceans in the Sinop region was obtained through boat-based visual observations. The study found that the highest number of Black Sea harbor porpoises, bottlenose dolphins, and common dolphins were observed in the spring. These findings provide valuable insights for future conservation strategies.
MARINE MAMMAL SCIENCE
(2023)
Article
Marine & Freshwater Biology
Thomas Taupp
Summary: Harbor porpoises are present year-round in the anthropogenically modified Ems Estuary, with their occurrence mainly explained by season, tide, and noise level. Their presumed feeding activity is detected in almost half of the positive blocks, indicating the importance of the estuary as a regular feeding area.
MARINE MAMMAL SCIENCE
(2022)
Article
Ecology
Ben C. Stevenson, Paul van Dam-Bates, Callum K. Y. Young, John Measey
Summary: Spatial capture-recapture (SCR) models are commonly used to estimate animal population density. This study introduces a new SCR model for estimating call rate and animal density from acoustic surveys, eliminating the need for additional fieldwork. The method demonstrates low bias, high precision, and accurate results consistent with previous studies.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Biodiversity Conservation
Elizabeth A. Becker, Karin A. Forney, Jessica Redfern, Jay Barlow, Michael G. Jacox, Jason J. Roberts, Daniel M. Palacios
DIVERSITY AND DISTRIBUTIONS
(2019)
Editorial Material
Marine & Freshwater Biology
Emily T. Griffiths, Jennifer L. Keating, Jay Barlow, Jeffrey E. Moore
MARINE MAMMAL SCIENCE
(2019)
Article
Biochemistry & Molecular Biology
Andrew D. Foote, Michael D. Martin, Marie Louis, George Pacheco, Kelly M. Robertson, Mikkel-Holger S. Sinding, Ana R. Amaral, Robin W. Baird, Charles Scott Baker, Lisa Ballance, Jay Barlow, Andrew Brownlow, Tim Collins, Rochelle Constantine, Willy Dabin, Luciano Dalla Rosa, Nicholas J. Davison, John W. Durban, Ruth Esteban, Steven H. Ferguson, Tim Gerrodette, Christophe Guinet, M. Bradley Hanson, Wayne Hoggard, Cory J. D. Matthews, Filipa I. P. Samarra, Renaud de Stephanis, Sara B. Tavares, Paul Tixier, John A. Totterdell, Paul Wade, Laurent Excoffier, M. Thomas P. Gilbert, Jochen B. W. Wolf, Phillip A. Morin
Article
Multidisciplinary Sciences
Armando M. Jaramillo-Legorreta, Gustavo Cardenas-Hinojosa, Edwyna Nieto-Garcia, Lorenzo Rojas-Bracho, Len Thomas, Jay M. Ver Hoef, Jeffrey Moore, Barbara Taylor, Jay Barlow, Nicholas Tregenza
ROYAL SOCIETY OPEN SCIENCE
(2019)
Article
Ecology
Regina A. Guazzo, Alisa Schulman-Janiger, Michael H. Smith, Jay Barlow, Gerald L. D'Spain, Dennis B. Rimington, John A. Hildebrand
MARINE ECOLOGY PROGRESS SERIES
(2019)
Article
Acoustics
Emily T. Griffiths, Frederick Archer, Shannon Rankin, Jennifer L. Keating, Eric Keen, Jay Barlow, Jeffrey E. Moore
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2020)
Letter
Multidisciplinary Sciences
Zhigang Mei, Peilin Cheng, Kexiong Wang, Qiwei Wei, Jay Barlow, Ding Wang
Article
Ecology
Elizabeth A. Becker, James Carretta, Karin A. Forney, Jay Barlow, Stephanie Brodie, Ryan Hoopes, Michael G. Jacox, Sara M. Maxwell, Jessica Redfern, Nicholas B. Sisson, Heather Welch, Elliott L. Hazen
ECOLOGY AND EVOLUTION
(2020)
Article
Ecology
Jay Barlow, Gregory S. Schorr, Erin A. Falcone, David Moretti
MARINE ECOLOGY PROGRESS SERIES
(2020)
Article
Marine & Freshwater Biology
K. Alexandra Curtis, Erin A. Falcone, Gregory S. Schorr, Jeffrey E. Moore, David J. Moretti, Jay Barlow, Erin Keene
Summary: Bayesian mark-recapture estimates were used to determine survival, abundance, and trends of Cuvier's beaked whales in a Navy training range off southern California. The study found that the deep-diving beaked whale family is particularly vulnerable to mid-frequency active sonar and that low sighting probabilities hinder research on the population-level impacts of MFAS on these whales. Further monitoring and data collection are crucial for understanding the direct effects of MFAS on beaked whales and broader population outcomes.
MARINE MAMMAL SCIENCE
(2021)
Article
Environmental Sciences
Selene Fregosi, Danielle Harris, Haruyoshi Matsumoto, David K. Mellinger, Jay Barlow, Simone Baumann-Pickering, Holger Klinck
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Acoustics
Jay Barlow, Selene Fregosi, Len Thomas, Danielle Harris, Emily T. Griffiths
Summary: Multiple empirical approaches were used to estimate the population density of Cuvier's beaked whales, resulting in a narrow range of density estimates. The distance-sampling approach with snapshot-based density estimates was found to have the most stringent assumptions but would be the easiest to implement for large scale surveys. Alternative approaches to estimating detection functions help validate this approach.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Marine & Freshwater Biology
Karin A. Forney, Jeffrey E. Moore, Jay Barlow, James Carretta, Scott R. Benson
Summary: This study analyzed the long-term population trends of harbor porpoises in California and found that after the elimination of gill net impacts, the growth rates of the MOR, MRY, and SFRR stocks were 9.6%, 5.8%, and 6.1% per year respectively, with abundance in northern California stable or slightly increasing. This is the first empirical estimate of the maximum net reproductive rate for harbor porpoises.
MARINE MAMMAL SCIENCE
(2021)
Article
Biodiversity Conservation
Charlotte Boyd, Jay Barlow, Elizabeth A. Becker, Karin A. Forney, Tim Gerrodette, Jeffrey E. Moore, Andre E. Punt
DIVERSITY AND DISTRIBUTIONS
(2018)
Article
Environmental Studies
Samara M. Haver, Jason Gedamke, Leila T. Hatch, Robert P. Dziak, Sofie Van Parijs, Megan F. McKenna, Jay Barlow, Catherine Berchok, Eva DiDonato, Brad Hanson, Joseph Haxel, Marla Holt, Danielle Lipski, Haru Matsumoto, Christian Meinig, David K. Mellinger, Sue E. Moore, Erin M. Oleson, Melissa S. Soldevilla, Holger Klinck