Article
Immunology
Verena Mertes, Alexander Kashulin Bekkelund, Leidy Lagos, Elia Ciani, Duncan Colquhoun, Hanne Haslene-Hox, Havard Sletta, Henning Sorum, Hanne Cecilie Winther-Larsen
Summary: The study tested isolated membrane vesicles as potential vaccine candidates for francisellosis in fish, but did not observe protective immunity in Atlantic cod and tilapia after vaccination. Further research is needed to understand the development of immunological memory in different fish species.
Article
Fisheries
Jerome Chladek, Daniel Stepputtis, Andreas Hermann, Peter Ljungberg, Paco Rodriguez-Tress, Juan Santos, Jon Christian Svendsen
Summary: Fish pots have lower catch efficiency than gillnets and trawls, but using transparent acrylic triggers can significantly improve catch efficiency, especially for Atlantic cod. Transparent acrylic fingers have higher entry-to-exit ratios compared to conventional Neptune fingers, and combining them with funnels further enhances catch efficiency.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Food Science & Technology
Line Skontorp Meidell, Ana Karina Carvajal, Turid Rustad, Eva Falch
Summary: Large quantities of marine raw material are lost on-board deep-sea vessels due to fast quality degradation. This study investigated the effect of raw material freshness and sorting on the quality, composition, and yield of thermally produced oil from cod residuals on a commercial trawler. The results showed that longer storage time resulted in higher oil yields, but an undesired emulsion formed after 4 days of storage. However, both viscera and liver could be stored for up to 2 days and still meet quality criteria for food applications.
Article
Fisheries
Velmurugu Puvanendran, Trilochan Swain, Helge Tveiten, Oyvind J. Hansen, Atle Mortensen
Summary: Larval cod require live prey for growth and survival, and prey concentration and feeding frequency are important factors. Water exchange rates and current also influence prey resident time and larval behavior. High water current induces stress and cortisol levels, while an intermediate rearing protocol leads to better growth and survival.
AQUACULTURE INTERNATIONAL
(2023)
Article
Food Science & Technology
Huilin Yu, Junhui Zhang, Honghao Li, Yan Zhao, Shengyao Xia, Yang Qiu, Jiajin Zhu
Summary: This study found that electron beam irradiation can effectively inactivate SARS-CoV-2 and improve the quality indicators of Atlantic cod, but it also has some effects on the hardness, chewiness, and color of the fish.
Article
Cell Biology
Synne Arstad Bjornestad, Monica Hongro Solbakken, Kjetill S. Jakobsen, Sissel Jentoft, Oddmund Bakke, Cinzia Progida
Summary: Until recently, it was believed that MHC genes and their associated immune components had been conserved since their evolutionary emergence. However, sequencing of the Atlantic cod genome revealed a loss of MHC class II genes and an extreme expansion of MHC class I genes. These findings suggest a possible functional shift from MHC class II to MHC class I.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2023)
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
Agriculture, Dairy & Animal Science
Nina Sandlund, Renate Johansen, Ingrid U. Fiksdal, Ann Cathrine B. Einen, Ingebjorg Modahl, Britt Gjerset, Oivind Bergh
Summary: Viral haemorrhagic septicaemia virus (VHSV) is a globally important group of viruses infecting a wide range of fish species, with recent initiatives to re-establish Atlantic cod as an aquaculture species. Studies show that Atlantic cod has limited ability to be infected by VHSV and has low susceptibility to the genotype III strain of this virus.
Article
Food Science & Technology
Rodrigo Melgosa, Marta Marques, Alexandre Paiva, Ana Bernardo, Naiara Fernandez, Isabel Sa-Nogueira, Pedro Simoes
Summary: This study investigated the valorization of Atlantic cod frames through subcritical water extraction and hydrolysis, yielding protein-rich extracts with potential anti-inflammatory properties and mineralized residues suitable for biomedical and tissue engineering applications.
Article
Environmental Sciences
Elin Sorhus, Charlotte L. Nakken, Carey E. Donald, Daniel M. Ripley, Holly A. Shiels, Sonnich Meier
Summary: Crude oil and single components like Phenanthrene can cause cardiotoxicity by interfering with excitation-contraction coupling. This study shows that the timing of exposure greatly affects the severity of cardiac dysfunction, with late exposure causing more severe abnormalities than early exposure. Early exposure to Phenanthrene had no effect on cardiac development and function.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
A. Gimpel, K. M. Werner, F. -D. Bockelmann, H. Haslob, M. Kloppmann, M. Schaber, V. Stelzenmueller
Summary: Evaluating the ecological effects of offshore wind farm expansion is crucial for understanding socio-ecological trade-offs and informing area-based management. However, little is known about the impact on demersal fish. This study found that wind turbine piles with scour protection can serve as feeding grounds and spawning areas for Atlantic cod, suggesting positive effects on local cod populations and contributing to the urgently needed observational evidence.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Ilya I. Gordeev, Yuri I. Bakay, Marina Yu. Kalashnikova, Andrey D. Logvinenko, Olga R. Emelianova, Sergey G. Sokolov
Summary: Atlantic cod and American plaice are commercially valuable species in the Barents Sea and are found to carry the nematodes from the Phocanema genus. The high abundance of Phocanema in these fish provides a convenient opportunity to study the genetic structure of these populations. Genetic analysis revealed that most of the isolated juveniles belonged to the species P. bulbosum. Furthermore, there were no significant differences found between the groups from different hosts and catch areas.
Article
Environmental Sciences
Andre S. Bogevik, Elisabeth Ytteborg, Alexander Klevedal Madsen, Ann-Elise Olderbakk Jordal, Odd Andre Karlsen, Ivar Ronnestad
Summary: In this study, polyethylene (PE) microplastics were added to Atlantic cod feeds at 1%, either in their original form or spiked with PCB-126. After a 4-week period, cod fed spiked PE showed a higher concentration of PCB-126 in liver and muscle samples compared to control and fish ingesting virgin PE. The expression of hepatic cyp1a was higher in cod fed spiked PE, indicating an accumulation of PCB-126 in the liver. Moreover, both spiked PE and virgin PE had an effect on the skin, suggesting a reduced skin barrier in fish fed a diet containing PE.
MARINE POLLUTION BULLETIN
(2023)
Article
Ecology
Steffen Funk, Nicole Funk, Jens-Peter Herrmann, Hans-Harald Hinrichsen, Uwe Krumme, Christian Moellmann, Axel Temming
Summary: Understanding individual growth in commercially exploited fish populations is crucial for stock assessment and fisheries management. Traditional methods for estimating fish growth have limitations, while bioenergetic modeling provides an alternative approach that can explain the effects of environmental changes on growth. A bioenergetic model for Western Baltic cod was developed, which successfully reproduced seasonal growth patterns and highlighted the potential negative impact of climate change on cod growth.
ECOLOGY AND EVOLUTION
(2023)
Article
Fisheries
Jerome Chladek, Daniel Stepputtis, Andreas Hermann, Isabella M. F. Kratzer, Peter Ljungberg, Paco Rodriguez-Tress, Juan Santos, Jon C. Svendsen
Summary: The study found that design parameters such as funnel color, presence, and length significantly impact the efficiency of fish pots for Atlantic cod. Transparent funnels had the highest entrance passage rates, and funnel presence increased entrance encounter rates. Additionally, the use of an infrared camera revealed a diurnal pattern in cod-pot interactions, emphasizing the importance of vision in guiding these interactions.
FISHERIES RESEARCH
(2021)
Article
Environmental Studies
Jan Atle Knutsen, Alf Ring Kleiven, Esben Moland Olsen, Halvor Knutsen, Sigurd Heiberg Espeland, Tonje Knutsen Sordalen, Susanna Huneide Thorbjornsen, Jeffrey A. Hutchings, Albert Fernandez-Chacon, Mats Huserbraten, David Villegas-Rios, Kim Tallaksen Halvorsen, Portia Joy Nillos Kleiven, Thomas Kiland Langeland, Even Moland
Summary: Research shows that reducing fishing pressure in marine protected areas (MPAs) has positive effects globally. In southern Norway, the implementation of lobster reserves has been successful in protecting lobster populations and attracting public attention. The lobster reserves have become an important supplement to traditional fisheries management over the past two decades, with more than 50 reserves established in Norway.
Biographical-Item
Fisheries
Rebekah A. Oomen, Halvor Knutsen, Even Moland, Esben Moland Olsen, Jan Atle Knutsen, Louis Bernatchez, Nils Chr. Stenseth, Paul Hart
FISH AND FISHERIES
(2022)
Article
Marine & Freshwater Biology
Mehis Rohtla, Even Moland, Anne Berit Skiftesvik, Eva B. Thorstad, Sebastian Bosgraaf, Esben M. Olsen, Howard I. Browman, Caroline M. F. Durif
Summary: Like many animals, the northern temperate eel can enter a dormancy-like state during the winter. The timing of dormancy is mainly related to photoperiod and less to temperature. In a fjord in Southern Norway, the European eel exhibited dormancy from late October or November until mid-April, with over 50% of eel becoming dormant when day length was less than 9 hours.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Fisheries
Kurt Johansen, Esben Moland Olsen, Tormod Haraldstad, Robert Arlinghaus, Erik Hoeglund
Summary: We found a positive relationship between fish size and angler satisfaction level when sea trout was caught, but no clear support for a positive relationship between catch outcome and angler satisfaction. Additionally, 52% of the captured sea trout were voluntarily released, unrelated to fish size.
NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT
(2022)
Article
Multidisciplinary Sciences
Tormod Haraldstad, Torbjorn Forseth, Esben M. Olsen, Thrond O. Haugen, Erik Hoglund
Summary: This study provides empirical support for the sequential imprinting hypothesis in Atlantic salmon, suggesting that the migration route during the smolt stage can have a significant impact on the subsequent spawning migration. These findings emphasize the importance of ensuring the successful return of adult salmon to their natal spawning grounds.
SCIENTIFIC REPORTS
(2022)
Article
Marine & Freshwater Biology
Katherine Dunlop, Arved Staby, Terje van der Meeren, Nigel Keeley, Esben M. Olsen, Raymond Bannister, Jon Egil Skjaeraasen
Summary: This study provides valuable insights into the habitat associations of juvenile coastal cod, saithe, pollack, goldsinny wrasse, and corkwing wrasse, with sublittoral biotic habitats and substrates, which is essential for the protection and management of commercially important demersal fish species.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Evolutionary Biology
David Villegas-Rios, Carla Freitas, Even Moland, Esben M. Olsen
Summary: The effects of marine reserves on protected populations are well-established, but their impact on behavioral traits is not well-understood. In this study, the individual spatial behavior of Atlantic cod within a marine reserve and a control site was monitored using acoustic telemetry. The results showed complex changes in survival and behavioral responses, indicating the need for more integrated approaches to understand the effects of marine protected areas.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Fisheries
Carmela de Benito-Abello, Luis Bentes, Ines Sousa, Marie Pedaccini, David Villegas-Rios, Esben Moland Olsen, Jorge M. S. Goncalves, Barbara Horta E. Costa
Summary: The study investigated the intraspecific spatial behavior variation of Diplodus sargus, a harvested fish, and identified four behavior types: residents, commuters, seasonal visitors, and single users. It demonstrates how acoustic telemetry can assist spatial conservation and fisheries management, and suggests that incorporating individual variation in behavior information into MPA design and implementation can increase the resilience of protected populations.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Zoology
Rebekah A. Oomen, Halvor Knutsen, Esben M. Olsen, Sissel Jentoft, Nils Chr Stenseth, Jeffrey A. Hutchings
Summary: Temperature greatly affects the physiology of Atlantic cod larvae, with high temperatures leading to an early onset of stress response, increased growth and mortality, and reduced fitness. The upregulation of thousands of transcripts in response to warming might act as an energetic drain for the larvae.
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2022)
Article
Fisheries
Kate McQueen, Justin J. Meager, Daniel Nyqvist, Jon Egil Skjaeraasen, Esben Moland Olsen, Orjan Karlsen, Petter H. Kvadsheim, Nils Olav Handegard, Tonje Nesse Forland, Lise Doksaeter Sivle
Summary: Seismic airgun surveys do not displace cod from their spawning grounds, according to a study using acoustic telemetry arrays.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Article
Fisheries
Keno Ferter, Hakon Ottera, Mary Christman, Alf Ring Kleiven, Marc Simon Weltersbach, Sofie Gundersen, Christine Djonne, Otte Bjelland, Bruce Hartill, Jeremy Lyle, Kieran Hyder, Trude Borch, Jon Helge Volstad
Summary: Marine recreational fishing in Norway faces challenges in estimating catches due to its long coastline and large tourist fishery. This study conducted surveys to monitor recreational anglers, estimate their catches, and evaluate the fishery in Troms and Hordaland County. The results showed differences in catches between the two regions and revealed that recreational anglers in Hordaland harvest more cod in coastal waters than commercial fishers. This study provides valuable information for developing monitoring methods and supporting science-based fisheries management.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Environmental Studies
Susanna Huneide Thorbjornsen, Ann-Elin Waroy Synnes, Ingrid Disch Loset, Alf Ring Kleiven
Summary: Ghost fishing is an animal welfare issue and a waste of food and ecosystem resources. Through a citizen science project, lost fishing gear was retrieved and the most hazardous gear types were identified. These results can inform future clean-up initiatives and management responses.
Article
Ecology
Marie Pedaccini, Ines Sousa, Luis Bentes, Carmela DeBenito-Abello, Pedro G. Lino, Even Moland, Jorge M. S. Goncalves, Barbara Horta e. Costa
Summary: This study focuses on the reproductive behavior of Diplodus sargus, a harvested fish, within a small no-take zone in Portugal, using acoustic telemetry. The study finds short-term and synchronised wider movements associated with environmental factors triggering reproduction in this species. Different behavioral groups of fish may aggregate and spawn simultaneously, contributing to the maintenance of behavioral polymorphisms and the species' evolutionary adaptability.
MARINE ECOLOGY PROGRESS SERIES
(2023)
Article
Ecology
Christopher T. Monk, Michael Power, Carla Freitas, Philip M. Harrison, Michelle Heupel, Anna Kuparinen, Even Moland, Colin Simpfendorfer, David Villegas-Rios, Esben M. Olsen
Summary: This study investigated the correlation between behavior type and diet in a protected population of Atlantic cod. By using acoustic telemetry and stable isotope compositions, the researchers determined the behavior and diet of the cod. The study further explored whether there were survival costs associated with behavior and diet.
JOURNAL OF ANIMAL ECOLOGY
(2023)
