Article
Environmental Sciences
Bingzhong Yang, Bent Herrmann
Summary: In demersal trawl fisheries of the South China Sea, size selectivity and catch efficiency of four codends for mantis shrimp were tested. Results showed that the codend with a 35-mm mesh size had the highest size selectivity but also incurred significant loss of legal individuals.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Evolutionary Biology
Laura M. Benestan, Quentin Rougemont, Caroline Senay, Eric Normandeau, Eric Parent, Rick Rideout, Louis Bernatchez, Yvan Lambert, Celine Audet, Genevieve J. Parent
Summary: This study utilized genomic markers and demographic modeling to investigate the population structure, distribution patterns, and speciation history of two cryptic redfish species, revealing their genetic distinctiveness and the influence of spatial distribution and depth on genomic variation.
EVOLUTIONARY APPLICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Bingzhong Yang, Bent Herrmann
Summary: This study tested and compared the size selectivity and catch efficiency of four codends for shrimp trawl fishery in the South China Sea. The results showed that increasing mesh sizes or applying specific mesh shapes can improve catch efficiency and size selectivity. Based on the findings, the T0 codend with a mesh size of 35 mm or the T90 codend with a mesh size of 30 mm are recommended as potential choices to mitigate the issue of undersized individuals. This study has important implications for gear-based management in the specific shrimp trawl fishery of the South China Sea.
Article
Environmental Sciences
Tomas Araya-Schmidt, Shannon M. Bayse, Paul D. Winger, Mark R. Santos
Summary: This study investigated the behavior of juvenile redfish in response to bycatch reduction devices (BRDs) called Nordmore grids. It found that over half of the redfish passed through the bar spacings of the grids and were retained. The results of the study suggest that the duration of time in front of the grid and the upward or steady grid reactions of the redfish significantly affected their retention.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
S. M. Bayse, P. D. Winger
Summary: A combination of qualitative and quantitative approaches were used to describe the behavior and escape of redfish in a T90 mesh codend of a demersal trawl. The study revealed that redfish behavior plays a crucial role in their escape mechanics, with several concentrated events where hundreds of redfish escape simultaneously from the codend. Importantly, these escapes occur at depth, reducing redfish mortality once they enter the trawl. Previous research using T0 mesh codends assumed that most redfish escape at the surface, which likely leads to high mortality due to the physoclistic biology of redfish. These findings further support the use of T90 mesh codends to reduce fishing mortality of redfish.
FISHERIES RESEARCH
(2023)
Article
Oceanography
Jesse Brinkhof, Roger B. Larsen, Bent Herrmann
Summary: This study compared the size selectivity and catch efficiency of two diamond-meshed codends turned 90 degrees (T90) with two different mesh sizes (135 and 145 mm) with those of a sorting grid followed by a diamond-mesh codend. The results showed that using a diamond-mesh codend is a more advantageous alternative to the sorting grid method in terms of catch efficiency and selectivity.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Engineering, Marine
Zhaohai Cheng, Paul D. Winger, Shannon M. Bayse, David Kelly
Summary: This study investigated and compared the hydrodynamic performance of different-sized codends and explored the impact of small-mesh covers using flume tank testing. The results showed that flow velocity decreased along the length of the codend, with T0 codend exhibiting a more pronounced effect. Increasing the mesh size of T90 codends did not significantly affect flow velocity. A new parameter, mesh circularity, was introduced to describe mesh opening. The results provide fundamental knowledge for understanding and improving selectivity of trawls in marine fisheries, especially regarding the masking effects of the cover net on the codend.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Fella Moualek, Dominic Belanger, Mathieu Babin, Genevieve J. Parent, Dominic E. Ponton, Marc Amyot, Caroline Senay, Dominique Robert, Zhe Lu
Summary: Mercury pollution, particularly in the form of methylmercury, poses a significant threat to the environment. This study investigated the distribution of methylmercury and total mercury in the muscle of deep-sea redfish and assessed the associated health risks for humans consuming redfish. The study found that factors such as fish length, muscle moisture, and nitrogen levels influenced the concentrations of methylmercury in redfish muscle. However, the average fish consumption rate by the general population is not expected to have adverse effects.
ENVIRONMENTAL POLLUTION
(2023)
Article
Multidisciplinary Sciences
Roger B. Larsen, Bent Herrmann, Manu Sistiaga, Jesse Brinkhof, Kristine Cerbule, Eduardo Grimaldo, Mark J. M. Lomeli
Summary: The introduction of NordmOre grid in shrimp trawls has reduced the bycatch of non-target species. This study estimated and compared the size selectivity of NordmOre grids with different bar spacings and found that reducing bar spacing can significantly reduce fish bycatch while only marginally affecting the catch efficiency of Northern shrimp.
Article
Engineering, Marine
Svetlana A. Murzina, Viktor P. Voronin, Tatjana R. Ruokolainen, Dmitrii V. Artemenkov, Alexei M. Orlov
Summary: By comparing the lipid and fatty acid profiles of beaked redfish caught in the wild and those from commercial supermarkets, this study evaluated the health implications of this popular food and calculated nutritional quality indexes. The results showed that commercial products had slightly degraded lipid quality and higher thrombogenicity index.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Environmental Sciences
Matt K. Broadhurst, Ian A. Knuckey, Russell B. Millar
Summary: Investigated the use of larger and more T90 meshes in an Australian fish-trawl codend to improve size selection and reduce discards of deepwater flathead. Larger-meshed codends caught fewer immature flathead but lost some larger fish. The discard percentage in this fishery is likely to remain high (>75%), and efforts to improve selection should consider other modifications besides codend changes.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Fisheries
Hannes Hoffle, Benjamin Planque
Summary: Beaked redfish is a commercially important species that produces living offspring. The natural mortality of this species has been assessed using various estimators, but the results have been highly variable. The estimators developed for other taxa may not be suitable for beaked redfish, indicating the need for further investigation.
FISHERIES RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Viktor P. Voronin, Nina N. Nemova, Tatjana R. Ruokolainen, Dmitrii V. Artemenkov, Aleksei Y. Rolskii, Alexei M. Orlov, Svetlana A. Murzina
Summary: Changes in lipid and fatty acid profiles in muscles of beaked redfish in the North Atlantic Irminger Sea were studied, with specific dynamics in certain phospholipids being found to be depth-dependent. High concentrations of DHA and EPA were observed in beaked redfish muscles, while the MUFAs content was lower in fish sampled from greater depths.
Article
Multidisciplinary Sciences
Bingzhong Yang, Bent Herrmann, Lei Yan, Jie Li, Teng Wang
Summary: This study compared the size selectivity and exploitation pattern of six diamond-mesh codends with different mesh sizes for Southern velvet shrimp in the South China Sea. Results showed that a 25mm codend was not suitable for protecting juvenile shrimp, while a 35mm codend struck a good balance between releasing undersized shrimp and retaining legal individuals.
Article
Environmental Sciences
Andrea Petetta, Bent Herrmann, Massimo Virgili, Daniel Li Veli, Jesse Brinkhof, Alessandro Lucchetti
Summary: The study found that design changes that work for the codend of bottom trawls do not necessarily work for other parts of the trawl, and may even have negative effects.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
S. M. Bayse, C. A. Shaughnessy, A. M. Regish, S. D. McCormick
ESTUARIES AND COASTS
(2020)
Article
Marine & Freshwater Biology
Morteza Eighani, Shannon M. Bayse, Seyed Yousef Paighambari, Matt K. Broadhurst
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2020)
Article
Engineering, Marine
Gebremeskel Eshetu Kebede, Paul D. Winger, Harold DeLouche, George Legge, Zhaohai Cheng, David Kelly, Haraldur Einarsson
Article
Fisheries
Stephen Eayrs, Michael Pol, Jon Knight, Jim Ford
Article
Fisheries
Khanh Q. Nguyen, Shannon M. Bayse, Meghan Donovan, Paul D. Winger, Svein Lokkeborg, Odd-Borre Humborstad
FISHERIES RESEARCH
(2020)
Letter
Fisheries
Shannon M. Bayse, Paul D. Winger, Khanh Q. Nguyen, Meghan Donovan, Rioghnach Steiner, Scott M. Grant
FISHERIES RESEARCH
(2021)
Article
Fisheries
T. Araya-Schmidt, M. R. Santos, K. Moret, H. DeLouche, G. Legge, S. M. Bayse
Summary: This study evaluated the performance of roller footgear in reducing negative benthic impacts and fuel usage compared to non-rolling rockhopper footgear in the Northern shrimp fishery. Results showed that footgear sections rotated at low rates, with significantly longer rotation times on mixed and soft seabeds compared to hard seabeds. The findings suggest that roller footgear may not be rotating as quickly as expected, providing valuable insights for further development of innovative footgear to minimize seabed impact.
FISHERIES RESEARCH
(2021)
Article
Fisheries
M. Pol, S. Eayrs
Summary: The iconic Atlantic cod has been the focus of substantial fishing-gear research, but understanding of cod behavior during capture in bottom trawls remains limited. Research should focus on directly observing and measuring cod's reactions and sensory capabilities to improve the selectivity of bottom trawls and reduce catches of cod.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Fisheries
Andrew W. Jones, Timothy J. Miller, Philip J. Politis, David E. Richardson, Anna M. Mercer, Michael Pol, Christopher D. Roebuck
Summary: The fishing industry in the northeast US is highly interested in the quality of bottom trawl survey results, as they are crucial for setting quotas. An experiment evaluating the impact of net spread on the catchability of flatfish species found that while total catch was affected by net wing spread, there was no evidence of a wing spread effect on relative catch efficiency for any of the species.
FISHERIES RESEARCH
(2021)
Article
Fisheries
Lekelia D. Jenkins, Stephen Eayrs, Michael Pol, Katie R. Thompson
Summary: This paper identifies six themes for successful fisheries change initiatives, including engaging diverse stakeholders, articulating clear benefits to fishers, communicating with fishers, demonstrating positive change agent qualities, and executing appropriate projects. These best practices have not consistently led to widespread change, possibly due to financial constraints, lack of outcome measurement, and insufficient training in change management and human behavior theories. The paper highlights the importance of developing affective change readiness among fishers and suggests the use of change readiness theory.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Vang Y. Nguyen, Shannon M. Bayse, Haraldur Arnar Einarsson, Olafur Arnar Ingolfsson
Summary: In this study, the authors investigated the groundfish herding behavior at the trawl mouth by studying the escape location underneath the trawl. They used three collecting bags to collect escapees and compared the escape-at-length of different species in the center bag and the wing bags. The results showed that fish size, swimming capacity, and herding behavior influenced the escape location.
Article
Fisheries
Mike Pol, Christos D. Maravelias
Summary: Effective tools, techniques, and strategies to improve commercial fish catches are often overlooked or unused. This themed article set aimed to promote deeper consideration of alternative gear and spatiotemporal avoidance by encouraging research on fishers' motivations and incentives to change. However, further research is needed as little overlap among theories was found and understanding of fishers' motivations is still rudimentary. Creative ideas on these topics continue to emerge.
ICES JOURNAL OF MARINE SCIENCE
(2023)