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
Fisheries
V. Puvanendran, I. Rud, M. S. W. Breiland, J. A. Arnesen, L. Axelsson
Summary: The study demonstrated that feeding Atlantic cod larvae with two Carnobacterium divergens strains significantly improved growth, survival, and disease resistance. The enrichment of carnobacteria in the feed did not significantly impact the overall microbiota diversity or composition. Despite this, the probiotic treatment positively affected the performance and welfare of cod larvae.
Article
Microbiology
Ragnhild Inderberg Vestrum, Torunn Forberg, Birgit Luef, Ingrid Bakke, Per Winge, Yngvar Olsen, Olav Vadstein
Summary: The roles of host-associated bacteria in marine larvae development have gained attention. This study found that the microbiota influences the innate immune system and gut development of Atlantic cod larvae, highlighting its important role.
Article
Chemistry, Applied
Yaqi Zhao, Xingyi Jiang, Chunya Tang, Qinchun Rao
Summary: In this study, tropomyosin from Atlantic cod fillets was purified and its structural configuration and antigenicity under different conditions were investigated. The results showed that CTM retained solubility, integrity, and antigenicity.
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
Biodiversity Conservation
Markus Brand, Lisa Spotowitz, Felix Christopher Mark, Jorgen Berge, Erlend Lindau Langhelle, Jan Marcin Weslawski, Jane Aanestad Godiksen, Philipp Fischer
Summary: This study provides the first insight into the age class composition, growth rates, and stomach content of Atlantic cod in the shallow water zone of Kongsfjorden, Svalbard. The findings suggest that these cod primarily feed on benthic food sources, supporting the hypothesis that the shallow water zone may serve as a nursery ground for Atlantic cod.
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
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
Maria Ovegard, Peter Ljungberg, Alessandro Orio, Kristin Ohman, Emilia Benavente Norrman, Sven-Gunnar Lunneryd
Summary: The Eastern Baltic stock of Atlantic cod has declined in numbers and condition due to an increase in the prevalence and intensity of the nematode Contracaecum osculatum. Higher densities of nematodes per gram of liver decrease cod's growth potential, preventing them from growing even when provided with sufficient food.
INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE
(2022)
Article
Environmental Sciences
M. Fernandez-Miguez, V. Puvanendran, E. Burgerhout, P. Presa, H. Tveiten, K. Vorkamp, O. J. Hansen, G. S. Johansson, A. S. Bogevik
Summary: This study evaluated the effects of feed containing naturally weathered microplastics from the Oslofjord on the reproductive physiology of Atlantic cod. The results showed that microplastics had some effects on the sex hormone levels and enzyme production and function of the fish, but there were no major differences in overall biometrics or gonad histology. These findings suggest that the long-term consequences of microplastics on the ecosystem should be considered.
ENVIRONMENTAL POLLUTION
(2023)
Article
Biology
Alessandro Cresci, Guosong Zhang, Caroline M. F. Durif, Torkel Larsen, Steven Shema, Anne Berit Skiftesvik, Howard I. Browman
Summary: An experiment in the North Sea shows that cod larvae orient themselves towards the source of low-frequency underwater noise generated by offshore wind turbines. This finding is important because the number of offshore wind turbines is increasing rapidly, and the continuous low-frequency noise they produce could impact marine fish, particularly during their larval stages. The experiment observed the behavior of Atlantic cod larvae in response to low-frequency sound in a Norwegian fjord.
COMMUNICATIONS BIOLOGY
(2023)
Article
Evolutionary Biology
Bjoerghild Breistein, Geir Dahle, Torild Johansen, Francois Besnier, Maria Quintela, Per Erik Jorde, Halvor Knutsen, Jon-Ivar Westgaard, Kjell Nedreaas, Eva Farestveit, Kevin Alan Glover
Summary: This study examines the population genetic structure of coastal Atlantic cod in Norway and finds that the genetically distinct migratory ecotype NEAC plays a major role in shaping the genetic connectivity among populations. Additionally, there is limited connectivity between different fjords.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Fisheries
Marit Bjornevik, Albert K. D. Imsland, Henriette Hanssen, Bjorn Roth, Erik Vikingstad, Atle Foss
Summary: This study found that alternate day feeding of Atlantic cod can significantly increase weight gain and improve feed conversion ratio, while reducing feed consumption. Feeding on alternate days can greatly reduce feeding costs without compromising biomass growth.
AQUACULTURE NUTRITION
(2021)
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.
