Article
Food Science & Technology
Jesse Brinkhof, Bent Herrmann, Manu Sistiaga, Roger B. Larsen, Nadine Jacques, Svein Helge Gjosund
Summary: The study assesses the damage levels of cod captured with a new gear design in the Barents Sea bottom trawl fishery, and investigates the impact of the compulsory sorting grid and diamond mesh codend configuration on cod damage during capture. Results show that substituting the gear configuration can increase the probability of cod having no catch damage by 6.00% and significantly reduce the severity of all catch damage categories.
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
Engineering, Marine
Lei Yan, Bingzhong Yang, Peng Zhang, Jie Li, Teng Wang
Summary: This study conducted experiments to assess the selectivity of diamond mesh codends in capturing largehead hairtail in the Beibu Gulf. Different mesh sizes were used, and models were fitted to the catch data to determine the best fit curve. It was found that the present minimum mesh size did not match the landing size and suggestions for the optimal configuration and mesh size were made.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Marine
Bingzhong Yang, Bent Herrmann, Rong Wan
Summary: We tested and compared the selective properties of four experimental codends in order to optimize the size selectivity of demersal trawl targeting Banded Scad in the South China Sea (SCS). The results showed that the T0_30 codend presented the best size selectivity and is a potential choice for harvesting Banded Scad in the studied area. Although using the T0_35 or T90_30 codend might improve the size selectivity slightly, it could result in the loss of marketable-size individuals. Based on our study and previous research, we recommend mandating the use of T0_30 codend in the fisheries management regulation of trawl fisheries targeting Banded Scad in the SCS.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
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
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
Fisheries
Tonje K. Jensen, Jesse Brinkhof, Stein-Kato Lindberg, Torbjorn Tobiassen, Karsten Heia, Stein Harris Olsen, Roger B. Larsen, Margrethe Esaiassen
Summary: This study aimed to compare the catch quality of Northeast Atlantic cod caught using the conventional configuration and T90 turned mesh codend. The results showed that there was no significant difference in catch damage or residual blood levels between the two gears.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Manu Sistiaga, Bent Herrmann, Jesse Brinkhof, Roger B. Larsen, Juan Santos, Daniel Stepputtis, Ilmar Brinkhof, Nadine Jacques, Kristine Cerbule, Andrea Petetta, Elsa Cuende, Liz Kvalvik
Summary: Shortening codend lastridge ropes can improve size selection in diamond mesh codends, but the optimal length is uncertain. Shortened ropes can cause folding of the net, potentially affecting size selectivity.
FISHERIES RESEARCH
(2023)
Article
Fisheries
Matt K. Broadhurst, Russell B. Millar
Summary: This experiment evaluated the effects of a narrower-than-recommended hooped cover on the conventional trawl codend, as well as the impact of inserting a large panel of smaller square-shaped mesh on the size selection of eastern school whiting. The results suggest that modifying the mesh size in the codend can marginally improve size selection for the targeted fish species.
FISHERIES RESEARCH
(2022)
Review
Fisheries
Steven J. Kennelly, Matt K. Broadhurst
Summary: This paper reviews efforts over the past 30 years to identify beneficial factors and propose a way forward in otter trawling for fish, which is one of the world's most productive yet problematic fishing methods. The study found that simple modifications such as changing mesh shapes or increasing mesh opening sizes can improve the effectiveness of otter trawls in reducing bycatch, but more rigorous experimental designs and straightforward interpretation of results are needed for further progress.
REVIEWS IN FISH BIOLOGY AND FISHERIES
(2021)
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
Fisheries
Jesse Brinkhof, Manu Sistiaga, Bent Herrmann, Eduardo Grimaldo, Roger B. Larsen
Summary: The use of compulsory selectivity gear configuration in the bottom trawl fishery in the Northeast Atlantic has shown problems with performance and efficiency. A recent study compared different gear configurations and found that an alternative codend with shortened lastridge ropes and a thinner twine improved size selectivity. The study also suggested that the abundance of cod below minimum legal size in the fishing area was low, and spatial and seasonal closures combined with flexible selection devices and modern monitoring tools could be an alternative to rigid enforcement of selective fishing gear.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Environmental Sciences
Matt K. Broadhurst, Ian A. Knuckey, Russell B. Millar
Summary: Turning conventional diamond-shaped meshes 90 degrees ('T90') in trawl extensions or codends is a simple modification that has improved size selection in European fisheries. However, in the Great Australian Bight, using the T90 mesh in the anterior codend did not significantly affect catches or sizes of discarded or retained species, except for a slightly improved quality of deepwater flathead attributed to the release of abrasive debris from the codend.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Francesca Ferragut-Perello, Claudio Vasapollo, Maria Valls, Maria Teresa Farriols, Enric Massuti, Beatriz Guijarro, Sergi Joher, Marina Bibiloni-Socias, Francesc Ordines
Summary: The Spanish bottom trawl fleet in the Mediterranean uses 40 mm square mesh codends, which have low selectivity and result in high proportions of immature fish in the catches. This study evaluated the selectivity of different net configurations in the hake fishery off the northwest Iberian Peninsula. The results showed that a 52 mm square meshed codend reduced discards and improved selectivity for most commercial species, but would lead to economic losses for target species.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Bingzhong Yang, Bent Herrmann
Summary: This study compares the size selectivity and exploitation pattern of diamond-mesh codends with various mesh sizes for cocktail shrimp in the South China Sea. The findings suggest that increasing the mesh size does not significantly improve the size selectivity and exploitation pattern.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Esther Savina, Bent Herrmann, Rikke P. Frandsen, Ludvig A. Krag
Summary: This paper presents a new method for estimating the length-dependent fish capture modes in gillnets. The study focused on cod in commercial monofilament nylon gillnets and found that the capture modes were dependent on fish size. The findings have implications for improving gear selectivity and efficiency.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Oceanography
Y. E. Fakioglu, H. Ozbilgin, G. Gokce, B. Herrmann
Summary: The study aimed to modify bottom trawl fishing gears to reduce the bycatch of slow-growing marine species such as rays and skates. Sea trials showed that the modified gear significantly reduced the capture probability of guitarfish and stingrays compared to the standard gear. The results for spiny butterfly ray were inconclusive. For most target species, there was no significant reduction in catch efficiency when using the modified gear, except for common sole. The technical measure of modifying bottom trawl gears has the potential to be an efficient and cost-effective way to reduce unwanted bycatch.
OCEAN & COASTAL MANAGEMENT
(2022)
Article
Oceanography
Juan Santos, Daniel Stepputtis, Daniel Oesterwind, Bent Herrmann, Uwe Lichtenstein, Constanze Hammerl, Uwe Krumme
Summary: This study developed and tested a simple roofless design concept to reduce cod bycatch in flatfish-directed trawl fisheries. The baseline roofless design consistently reduced cod bycatch by about 75%, with minimal impact on the catch of the target species flounder and plaice. The use of the baseline roofless concept could significantly increase fishing possibilities for flatfish.
OCEAN & COASTAL MANAGEMENT
(2022)
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
Ecology
Bent Herrmann, Kristine Cerbule, Jure Brcic, Eduardo Grimaldo, Maxime Geoffroy, Malin Daase, Jorgen Berge
Summary: Measures of biodiversity are crucial for monitoring ecosystems. Marine faunal biodiversity is often quantified using samples collected through trawling. To track changes in biodiversity, samples are collected from multiple stations. Estimation of biodiversity indices must account for spatial-temporal variation and uncertainty in sample size. The nested bootstrapping method presented here addresses these uncertainties and allows for inference of biodiversity changes.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Fisheries
Zita Bak-Jensen, Bent Herrmann, Juan Santos, Nadine Jacques, Valentina Melli, Jordan P. Feekings
Summary: This study found that the commonly used diamond-mesh codends in demersal trawls tend to have varying mesh geometry during fishing, resulting in an unclear size selection process. By comparing experimental tests, it was discovered that rigid codends with constant mesh geometry have better stability in size selection for Atlantic cod. These findings can guide the design of more suitable codends in future research.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Fisheries
Jesse Brinkhof, Manu Sistiaga, Bent Herrmann, Eduardo Grimaldo, Roger B. Larsen
Summary: The use of compulsory selectivity gear configuration in the bottom trawl fishery in the Northeast Atlantic has shown problems with performance and efficiency. A recent study compared different gear configurations and found that an alternative codend with shortened lastridge ropes and a thinner twine improved size selectivity. The study also suggested that the abundance of cod below minimum legal size in the fishing area was low, and spatial and seasonal closures combined with flexible selection devices and modern monitoring tools could be an alternative to rigid enforcement of selective fishing gear.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Oceanography
Jesse Brinkhof, Eduardo Grimaldo, Bent Herrmann, Hermann Pettersen
Summary: This study compared the effectiveness of two different sizes of sorting grids in Norway pout fishery, finding that increasing grid area can reduce unwanted by-catch species without affecting the catch efficiency of target species.
OCEAN & COASTAL MANAGEMENT
(2022)
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
Fisheries
Marina Masanovic, Bent Herrmann, Jure Brcic
Summary: This study presents a framework for integrating both the size selection processes occurring in the creel on the seabed and the fisher on the vessel. It predicts the impact of mesh size and shape on the size selection in creel fishery targeting the Norway lobster. The research demonstrates the contribution of both processes and suggests an optimal creel mesh size for efficient selection of the targeted sizes of Nephrops.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Engineering, Marine
Eduardo Grimaldo, Bent Herrmann, Enis N. Kostak, Jesse Brinkhof
Summary: A major challenge for the aquaculture sector is finding sustainable and cost-effective raw materials for feed. This study aimed to develop a more energy-efficient and efficient trawl for harvesting zooplankton. The results showed that the filtration efficiency of the net increased with increasing flow velocity and decreasing solidity and taper angle.
Article
Oceanography
Ha-Kyung Kim, In-Hwan Cho, Eun-A Hwang, Young-Hyo Kim, Jeong-Suk Moon, Bae-Kyung Park, Baik-Ho Kim
Summary: This study investigated the distribution of diatoms in 324 estuaries on the Korean Peninsula from 2016 to 2018, with a focus on the ecological impact of artificial dams. The results highlighted the complex interactions between dams, land use, and diatom communities, providing important data for ecosystem management and biodiversity conservation. Understanding the consequences of artificial dams on diatom distribution is crucial for preserving estuarine health.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Tianhang Gao, Jia Tian, Chuan Huang, Hongyu Wu, Xing Xu, Changjian Liu
Summary: This study explores the microcontainer transport service and route selection problem within the context of a new transportation corridor. A multiobjective planning model is established to minimize transportation cost, time, and carbon emissions. The findings demonstrate that the New Western Land and Sea Corridor is appealing for time-sensitive cargoes and can enhance economic benefits with supportive policies.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Jintao Ma, Zhengjie Wu, Mengqian Guo, Qiuguang Hu
Summary: With the deepening of economic globalization and regional economic integration, marine fisheries are becoming increasingly connected to national strategic interests and economic vitality. It is necessary to explore the synergistic evolution of marine fisheries economic development, environmental protection, and technological progress in order to promote sustainable and healthy development of marine fisheries.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Wenhan Ren, Yuhan Xu, Jing Ni
Summary: This paper focuses on the key role of human economic activities in the evolution of ecological security from the perspective of eco-industrial symbiosis and constructs a symbiotic system of indicators considering human economic activities and all subsystems. The research findings reveal that in China's coastal areas, the socio-economic development index shows a stable upward trend, the environmental capacity index remains stable, and the ecological impact index shows a fluctuating and undulating trend.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Xiao Zhou
Summary: This study develops a spatial risk assessment approach for maritime transportation in China using machine learning and geospatial big data. The study identifies wave height, rainfall, and sea surface temperature as the most influential factors affecting navigational safety. It also analyzes the matching relationship between coastal search and rescue resources and maritime transportation risks.
OCEAN & COASTAL MANAGEMENT
(2024)
Review
Oceanography
X. Yang, Z. Y. Lin, W. J. Zhang, S. Xu, M. Y. Zhang, Z. D. Wu, B. Han
Summary: The study highlights the increasing importance of Arctic navigation safety and identifies gaps in the application of risk assessment methodologies. It calls for decision-oriented modelling techniques and bridging the gap between academic research and practical application.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Vladimir J. Alarcon, Anna C. Linhoss, Christopher R. Kelble, Paul F. Mickle, Alexandra Fine, Enrique Montes
Summary: Estuaries and coastal areas are undergoing rapid changes due to climate change and sea level rise. This research presents a salinity transport model for Biscayne Bay and investigates the potential impacts of altered precipitation, increased salinity/temperature, and sea level rise on bay salinity. The findings suggest that current restoration plans may not be sufficient to maintain current salinity conditions, and management measures such as urban greening, artificial groundwater recharge, and water consumption reduction should be considered.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Manuel Vargas-Yanez, Ana Reeves-Bueno, Sara Fernandez-Topham, Francina Moya, Enrique Ballesteros, Cristina Alonso, Teresa Perez-Sanchez, Patricia Romero-Fernandez, Silvia Sanchez-Aguado, Ricardo Felix Sanchez-Leal, M. Carmen Garcia-Martinez
Summary: This study analyzed the phytoplankton communities in the upper 100 m of the Gulf of Cadiz and the Alboran Sea using time series data. The results show that these two regions can be considered as two differentiated bioregions, with the latter having higher productivity.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Donna Dimarchopoulou, Ioannis Keramidas, Konstantinos Tsagarakis, Vasiliki Markantonatou, Ghassen Halouani, Athanassios C. Tsikliras
Summary: The study shows that spatiotemporal simulation modeling is an effective tool for investigating management options in ecosystem-based fisheries management. It demonstrates that fisheries restricted areas can help rebuild the biomass of exploited stocks, but their effectiveness depends on the size and location of the areas. The study also suggests that a parallel reduction in total fishing effort is necessary to achieve the highest benefits of protection.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Junita D. Karlsen, Ludvig Ahm Krag, Bent Herrmann
Summary: Fisheries management is transitioning from a single-species approach to an ecosystem-based approach to address the complexities of mixed-species fisheries. A dual compartment codend concept can provide a complex selectivity profile and allow for flexible adjustments at sea, improving compliance with management objectives.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Yi-Zhuo Zhang, Cheng Xue, Na Wang, Gang Chen
Summary: This paper evaluates typical coastal provinces and cities in China, constructing an evaluation indicator system and clarifying the regional differences in the sustainable development capacity of China's marine fisheries industry. The results show that Shandong Province and Fujian Province have advantages in sustainable development, while Tianjin, Hebei Province, and Shanghai have room for improvement.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Caimao Tan, Tiantian Qin, Junliang He, Yu Wang, Hang Yu
Summary: This study addresses the storage space allocation problem of container yards based on the dual-cycle operation mode. A mixed integer programming model is established to optimize container transportation distance. The results show that dual-cycle operation can decrease transportation distance and the space allocation method based on it is more effective than traditional methods. The study also provides management insights for container ports and suggests effective solutions for bottleneck problems.
OCEAN & COASTAL MANAGEMENT
(2024)
Article
Oceanography
Haye H. Geukes, Peter M. van Bodegom, Alexander P. E. van Oudenhoven
Summary: This study aims to identify and explore the information requirements at different stages of the decision-making process of coastal nature-based solutions (NbS). The study found substantial differences in information requirements across the decision-making stages, with values and indicators becoming more specific and concrete as the stages progressed. The study also suggests that future changes in the information required for decision-making on coastal NbS can be anticipated and prepared for.
OCEAN & COASTAL MANAGEMENT
(2024)
