Article
Fisheries
Jon-Ivar Westgaard, Guldborg Sovik, Torild Johansen
Summary: Our study examined the genetic structure of Norway lobster (Nephrops norvegicus) in the Skagerrak-Kattegat and Norwegian Deep regions using DNA markers. We found no genetic structure within this region, but detected a shallow structure between Scotland and Iceland. Female lobsters showed greater genetic differences, indicating sex-biased dispersal. Ocean currents may connect Nephrops populations through larval drift. Despite evidence for one biological population, differences in fishing pressure and regulations support the current two-areas management regime.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Review
Environmental Sciences
Jacopo Aguzzi, Damianos Chatzievangelou, Nathan J. Robinson, Nixon Bahamon, Alan Berry, Marc Carreras, Joan Batista Company, Corrado Costa, Joaquin del Rio Fernandez, Ahmad Falahzadeh, Spyros Fifas, Sascha Floegel, Jordi Grinyo, Jonas Pall Jonasson, Patrik Jonsson, Colm Lordan, Mathieu Lundy, Simone Marini, Michela Martinelli, Ivan Masmitja, Luca Mirimin, Atif Naseer, Joan Navarro, Narcis Palomeras, Giacomo Picardi, Cristina Silva, Sergio Stefanni, Maria Vigo, Yolanda Vila, Adrian Weetman, Jennifer Doyle
Summary: The article introduces how innovative ecological monitoring technologies can be used to improve the accuracy of stock assessments for the Norway lobster. By using robotic platforms, telemetry, environmental DNA, and Artificial Intelligence tools, it is possible to better observe and count the lobsters and their burrow systems, as well as provide important insights into their burrowing behavior.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
Alfredo Garcia-de-Vinuesa, Francesc Maynou, Montserrat Demestre
Summary: The current EU fisheries policy encourages improving handling practices to increase discard survival. In the Mediterranean upper slope trawl fishery, a high percentage of discards, including Nephrops norvegicus juveniles, are returned to the sea. The survival probability of N. norvegicus discards is related to on-board vitality and varies seasonally, being particularly low in summer. Immersing N. norvegicus in cooled seawater on board during catch selection and discard time can improve discard survival rate.
Article
Environmental Sciences
Alexios Lolas, Dimitris Vafidis
Summary: The study focused on the Norway lobster fishery in Pagasitikos Gulf, finding that the local stock is over-exploited. Long-term monitoring of population dynamics, fishery, and exploitation status are crucial for sustainable management of this valuable shellfish resource. Regional policymakers should take into consideration the findings when making decisions.
Review
Biology
Jacopo Aguzzi, Simona Violino, Corrado Costa, Nixon Bahamon, Joan Navarro, Damianos Chatzievangelou, Nathan. J. J. Robinson, Jennifer Doyle, Michela Martinelli, Colm Lordan, Joan. B. B. Company
Summary: This study used VOSviewer software to investigate the research status of Norway lobsters by analyzing scientific literature published in SCOPUS. The analysis revealed that research focused on fishery performance, biological cycles, and physiology and ecotoxicology. However, there is limited knowledge about how the burrowing behavior of Norway lobsters is influenced by environmental conditions and its impact on stock assessment, which may be due to the underutilization of advanced monitoring technologies.
Article
Computer Science, Theory & Methods
Atif Naseer
Summary: Marine experts face challenges in monitoring marine species habitats, particularly in the underwater environment. Data collection of marine species also proves problematic. Traditional methods using cameras and satellite data have been replaced by underwater Autonomous Underwater Vehicles (AUVs), Remotely Operated Vehicles (ROVs), and high-definition cameras for recording underwater footage. This study focuses on the automatic detection of Nephrops norvegicus, a commercially valuable species in Europe, using deep learning techniques. The results demonstrate that deep learning techniques are beneficial for accurately assessing Nephrops norvegicus abundance.
INTERNATIONAL JOURNAL OF ADVANCED COMPUTER SCIENCE AND APPLICATIONS
(2023)
Article
Fisheries
Ryan McGeady, Colm Lordan, Anne Marie Power
Summary: This study used a biophysical larval transport model to analyze larval dispersal of Norway lobsters off the coast of Ireland, finding that different areas had varying abilities to retain and exchange larvae influenced by local hydrodynamics. It was discovered that in the Aran grounds with consistently low larval supply, there was a 3-year lagged relationship between modelled larval dispersal indices and empirical adult burrow densities.
FISHERIES OCEANOGRAPHY
(2022)
Article
Ecology
Maria Vigo, Joan Navarro, Ivan Masmitja, Jacopo Aguzzi, Jose Antonio Garcia, Guiomar Rotllant, Nixon Bahamon, Joan B. Company
Summary: Norway lobsters are important marine resources for European fisheries, but overfishing has led to declines in populations, particularly in the Mediterranean Sea. Implementing no-take marine reserves may help reverse this trend. Study on the spatial movements and behavior of Norway lobsters in these reserves provides valuable information for conservation and management. The findings suggest that small no-take marine areas focused on recovering Norway lobster populations can be effective.
MARINE ECOLOGY PROGRESS SERIES
(2021)
Article
Environmental Sciences
Simone Franceschini, Alessandro Cau, Lorenzo D'Andrea, Maria Cristina Follesa, Tommaso Russo
Summary: Plastic waste dumped in the marine environment has severe impacts on ecosystems, society, and the economy. Recent studies have shown the contamination of marine organisms by microplastics originating from macroplastic degradation. This research investigated the relationship between potential sources of microplastics and ingestion by benthic crustaceans, highlighting the importance of considering plastic fate in marine environments and its impacts on biota and seafood quality.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Fisheries
Henry W. Slesser, Clive N. Trueman
Summary: Ensuring sustainability of world fisheries is crucial. Traceability of seafood from harvest to sale is important for management and protection. Isotope-based geolocation can accurately identify catch location of marine organisms.
JOURNAL OF SHELLFISH RESEARCH
(2021)
Article
Fisheries
Fabian Zimmermann, Alf Ring Kleiven, Merete Vik Ottesen, Guldborg Sovik
Summary: This study compares commercial landings of Norway lobster with data collected through a citizen science project by recreational fishers. The results show that recreational fishing can act as an early indicator of emerging commercial fisheries, highlighting the importance of collecting information from non-commercial fishers. Such data can provide baseline information and contribute to stock assessment.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2022)
Article
Environmental Sciences
Ester Carreras-Colom, Joan E. Cartes, Oriol Rodriguez-Romeu, Francesc Padros, Montserrat Sole, Michael Grelaud, Patrizia Ziveri, Cristina Palet, Anna Soler-Membrives, Maite Carrasson
Summary: This study assesses plastic ingestion and tissue levels of potentially toxic metallic elements in Nephrops norvegicus, as well as the health condition of the species. The results show that plastic fibers are commonly found in the stomachs of N. norvegicus, but their health condition does not seem to be negatively affected by anthropogenic pollutant levels.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Haleigh Joyce, Roisin Nash, Fiona Kavanagh, Thomas Power, Jonathan White, Joao Frias
Summary: The retention times of microplastic fibers in the gastrointestinal tract of Nephrops norvegicus vary depending on their length, with larger fibers being retained for longer periods. This study also assesses the size-dependent relationship of microplastic fibers for N. norvegicus under controlled conditions.
MARINE POLLUTION BULLETIN
(2022)
Article
Computer Science, Information Systems
Atif Naseer, Enrique Nava Baro, Sultan Daud Khan, Yolanda Vila, Jennifer Doyle
Summary: This article introduces an automated system based on deep neural networks for detecting and counting Norwegian lobster burrows, aiming to improve efficiency. The authors conducted experiments using advanced deep learning models and found that the Inception model achieved higher precision and recall rates.
CMC-COMPUTERS MATERIALS & CONTINUA
(2022)
Article
Environmental Sciences
C. A. Stenton, E. L. Bolger, M. Michenot, J. A. Dodd, M. A. Wale, R. A. Briers, M. G. J. Hartl, K. Diele
Summary: This study investigates the combined effects of anthropogenic sound pollution and waterborne cadmium on the Norway lobster at different biological levels. The results show that the interactions between cadmium and sound playbacks synergistically increase larval mortality, while sound playbacks alone are antagonistic to cadmium toxicity. Cadmium exposure delays larval development and affects swimming behavior in the presence of sound playbacks. The detrimental effects are believed to be caused by oxidative stress, with cellular metallothionein acting as the main protective mechanism.
MARINE POLLUTION BULLETIN
(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
Multidisciplinary Sciences
Elsa Cuende, Manu Sistiaga, Bent Herrmann, Luis Arregi
Summary: This study examines the size selectivity and catch patterns of different gear combinations in the Basque bottom trawl fishery. The results demonstrate the significant impact of design changes in square mesh panels and codends on the size selectivity and catch patterns of hake and blue whiting. The study suggests prioritizing research on codend size selectivity and the addition of selection devices once good selective properties are achieved.
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
Agriculture, Dairy & Animal Science
Niels Madsen, Rasmus Ern, Aage Kristian Olsen Alstrup
Summary: This paper focuses on the importance of discard survival studies (DSS) in EU fisheries and how to comply with animal welfare regulations in experiments. The field of DSS is influenced by animal research welfare requirements and is expected to become more restrictive in the future due to growing public concern for fish welfare.
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
Green & Sustainable Science & Technology
Giovanni Codotto, Massimo Pizzol, Troels J. Hegland, Niels Madsen
Summary: The results of life cycle assessment (LCA) studies are influenced by modeling choices and data used. This study investigates the combined effect of modeling choices and variability on the uncertainty of LCA results of fish products.
JOURNAL OF INDUSTRIAL ECOLOGY
(2023)
Article
Fisheries
Miguel Petrere Jr, Davi Butturi-Gomes
Summary: This short communication aims to raise awareness about the misuse of confidence intervals in Ecology and Fisheries statistical models that ignore the lack of independence.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Peter-John F. Hulson, Benjamin C. Williams
Summary: This study evaluates the impact of considering ageing error and growth variability on the determination of input sample size (ISS) in statistical catch-at-age assessment models. The results show that including these sources of uncertainty decreases the ISS determined through bootstrap methods. This indicates that there is more variability in age composition and conditional age-at-length data than previously accounted for. Including these sources of uncertainty improves the estimation of ISS and subsequently improves the quality of stock assessment models.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jason M. Cope
Summary: Fishery resource assessment is a complex and challenging task, but with the use of different analysis methods and tools, effective management guidance can be provided even with limited data and resources.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Regina L. Cunha, Joana I. Robalo, Sara M. Francisco, Ines Farias, Rita Castilho, Ivone Figueiredo
Summary: Recent advances in genomics have greatly contributed to the assessment of fish stocks by providing precise identification of genetic boundaries. This study used a genotyping-by-sequencing approach to reveal the existence of an additional genetic cluster of blackspot seabream in the northeast Atlantic, which was not previously identified. Factors such as ocean circulation patterns and local upwelling may play a role in the genetic differentiation observed in this study.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Huihua Lee, Mark N. Maunder, Kevin R. Piner
Summary: Estimating growth is important for fish population assessment. Integrated assessment models and the influence of misfitting size composition data have renewed interest in how growth is modeled. The available data types control how the length-at-age relationship is estimated. Estimating length-at-age is complex due to multiple sources of biological variability and difficulties in obtaining representative samples.
FISHERIES RESEARCH
(2024)
Article
Fisheries
A. Ladino, I. Perez-Arjona, V. Espinosa, M. Chillaron, V. Vidal, L. M. Godinho, G. Moreno, G. Boyra
Summary: This study examines the acoustic properties of skipjack tuna and Atlantic mackerel, both bladderless pelagic fish species, and explains the significant differences observed. The research shows that the differences in material properties of their tissues predict a more than 10 dB greater reduced target strength in skipjack compared to mackerel at certain frequencies.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Nelly Pena-Cutimbo, Cristel Cordero-Maldonado, Clara Ortiz-Alvarez, Joanna Alfaro-Shigueto, Jeffrey C. Mangel
Summary: Bycatch is a global problem for marine megafauna. This study assessed the bycatch interactions of the Peruvian artisanal purse-seine fishery in 2019 and found that all taxa groups were affected by bycatch. Dusky dolphins, guanay cormorants, and eagle rays were the most frequently reported bycatch species.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Jen-Ming Liu, Po-Yuk So
Summary: The set-net fishery is an environmentally friendly fishery posing little risk to the marine ecosystem. This study identified ocean temperature, sea surface factors, and climatic factors as the main factors affecting the installation of set-nets.
FISHERIES RESEARCH
(2024)
Article
Fisheries
Josie L. Palmer, Carina Armstrong, Hasan D. Akbora, Damla Beton, Cigdem Caglar, Brendan J. Godley, Kristian Metcalfe, Meryem Ozkan, Robin T. E. Snape, Annette C. Broderick
Summary: Small-scale fisheries are vital for global food security and cultural heritage, but the lack of information hampers effective management and mitigation of ecological impacts. This study provides the first comprehensive overview of the small-scale fishery fleet in Northern Cyprus. The fleet operates mainly over the continental shelf, using static and demersal gear types, and catches a diverse range of species, some of which are threatened. The findings can be used to improve fisheries management and conservation measures.
FISHERIES RESEARCH
(2024)
