Review
Environmental Sciences
Magnus Aune, Evgeniia Raskhozheva, Hector Andrade, Starrlight Augustine, Alexei Bambulyak, Lionel Camus, JoLynn Carroll, Andrey V. Dolgov, Haakon Hop, Denis Moiseev, Paul E. Renaud, Oystein Varpe
Summary: The article summarizes current data and knowledge on polar cod from the Russian sector of the Barents Sea, discussing key knowledge needs for management of the species and identifying important knowledge gaps.
MARINE ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Anjali Gopakumar, Julia Giebichenstein, Evgeniia Raskhozheva, Katrine Borga
Summary: This study quantified mercury concentrations, carbon, and nitrogen stable isotope ratios in polar cod, Atlantic cod, and capelin sampled from the North-West and North-East Barents Sea. The research found that mercury concentrations varied between species and regions, but remained below toxicity thresholds for fish health and human consumption. Atlantic cod in the North-East had the highest mercury concentrations due to its larger size, higher trophic position, and benthopelagic feeding, while polar cod in the North-East had higher mercury concentrations than in the North-West, likely due to differences in food web structure and mercury exposure.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Studies
Trond Bjorndal, Torben Foss, Gordon R. Munro, Mogens Schou
Summary: This paper discusses the potential impact of Brexit on quota sharing between Norway, the UK, and the EU, with Norway and the UK having agreed on a framework fisheries agreement but still unable to reach agreement on quota sharing and access for 2021. Additionally, there is uncertainty surrounding the conflict between Norway and the EU over cod quotas in the SPZ.
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
Biology
Simo Njabulo Maduna, Jon Aars, Ida Floystad, Cornelya F. C. Klutsch, Eve M. L. Zeyl Fiskebeck, Oystein Wiig, Dorothee Ehrich, Magnus Andersen, Lutz Bachmann, Andrew E. Derocher, Tommi Nyman, Hans Geir Eiken, Snorre B. Hagen
Summary: Climate change-induced loss of Arctic sea ice is predicted to have negative impacts on genetic diversity and gene flow in ice-dependent species like polar bears. A study on polar bears in the Svalbard Archipelago showed a loss in genetic diversity and an increase in genetic differentiation, attributed to habitat fragmentation caused by reduced sea ice coverage leading to increased inbreeding within local populations. This highlights the importance of genetic monitoring for developing adaptive management strategies for polar bears and other ice-dependent species.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Fisheries
Joel M. Durant, Natalia Yaragina, Leif Christian Stige
Summary: This study investigated the spatiotemporal variability of juvenile Atlantic cod growth and survival using Barents Sea bottom survey data, finding that the location within the Barents Sea where age-1 cod are distributed affects their growth and survival. Year-classes in the western Barents Sea had higher mortality but faster growth compared to those distributed farther east, indicating a significant role of distribution in the survival and growth of age-1 cod.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Environmental Sciences
Vladimir Kudryavtsev, Anastasiia Stokoz, Kirill Khvorostovsky
Summary: In this study, the sea surface height anomalies caused by polar lows in the Barents Sea were investigated using satellite altimeter measurements and model simulations. The observed anomalies were shaped like troughs with the lowest height at the center of the polar lows and were well distinguished within one day after the passage. A simplified model successfully reproduced the observed anomalies along most satellite altimeter tracks.
Article
Environmental Sciences
Michael S. Bank, Quang Tri Ho, Randi B. Ingvaldsen, Arne Duinker, Bente M. Nilsen, Amund Maage, Sylvia Frantzen
Summary: The study evaluates the effects of climate change dynamics on mercury temporal trends in Northeast Arctic cod using long-term ocean temperature, sea ice extent, and mercury concentration data. The findings suggest that despite significant changes in temperature and sea ice extent, mercury bioaccumulation in Northeast Arctic cod did not show major increases or decreases. This highlights the complex and context-specific nature of mercury bioaccumulation and its relationship with climate change.
ENVIRONMENTAL POLLUTION
(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
Raphaelle Descoteaux, Elizaveta Ershova, Owen S. Wangensteen, Kim Praebel, Paul E. Renaud, Finlo Cottier, Bodil A. Bluhm
Summary: This study investigated the taxonomic composition and seasonal distribution of meroplankton in the Barents Sea, finding a high diversity of species yearround with abundance peaking in August and November. Different species dominated larval abundance and taxon diversity across the Polar Front, with higher total abundance in the south and greater taxon richness in the north. New knowledge on seasonal patterns of meroplanktonic species has implications for understanding environment-biotic interactions in the changing Arctic.
FRONTIERS IN MARINE SCIENCE
(2021)
Review
Oceanography
Doreen Kohlbach, Lukas Smik, Simon T. Belt, Haakon Hop, Anette Wold, Martin Graeve, Philipp Assmy
Summary: Microalgae growing within and attached to Arctic sea ice can serve as a nutritious food resource for under-ice fauna, particularly during the bottom ice-algal bloom in spring. Trophic marker analysis of pelagic and ice-associated organic matter, as well as amphipods and polar cod, revealed dietary preferences and trophic associations to the sea-ice habitat during spring, indicating a valuable role of ice algae as a nutritional carbon source.
PROGRESS IN OCEANOGRAPHY
(2022)
Review
Oceanography
Hein Rune Skjoldal, Elena Eriksen, Harald Gjosaeter, Oystein Skagseth, Dmitry Prozorkevich, Vidar S. Lien
Summary: This study investigated the spatial and temporal variation of 0-group fish in the Barents Sea. The results showed significant differences in length among different species, with climate variability and warming having a strong impact on 0-group length. Food availability also played a significant role.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Fisheries
Geir Ottersen, Rebecca E. Holt
Summary: This study examines the impact of the spawning stock on the connection between the environment and recruitment, and its significance for the dynamics of cod populations. The findings support earlier hypotheses and provide stronger evidence for the relationship. Furthermore, the study emphasizes the importance of considering environmental status in fisheries management advice.
FISHERIES OCEANOGRAPHY
(2023)
Article
Fisheries
Aurore Receveur, Martina Bleil, Steffen Funk, Sven Stoetera, Ulf Graewe, Michael Naumann, Cyril Dutheil, Uwe Krumme
Summary: The western Baltic Sea cod (WBC) stock is at historically low levels due to overfishing and low recruitment. While stable stock assessment metrics suggest potential for recovery with appropriate fisheries management, changing environmental conditions may negatively impact WBC and pose challenges for resource management.
ICES JOURNAL OF MARINE SCIENCE
(2022)
Review
Oceanography
Elena Eriksen, Hein Rune Skjoldal, Andrey V. Dolgov, Espen Strand, Felicia Keulder-Stenevik, Irina P. Prokopchuk, Tatiana A. Prokhorova, Dmitry Prozorkevich, Aleksander N. Benzik
Summary: The study found that the trophic structure of fish communities in the Barents Sea shows some variations in both spatial and seasonal aspects. However, the main groups of piscivores, planktivores, and benthivores remain consistent across seasons. Planktivores, especially, show clear signs of seasonality as they rely on the 'pulse' of new generations of zooplankton, such as Calanus finmarchicus, developing in spring and summer.
PROGRESS IN OCEANOGRAPHY
(2021)
Review
Oceanography
Elena Eriksen, Hein Rune Skjoldal, Harald Gjosaeter, Raul Primicerio
PROGRESS IN OCEANOGRAPHY
(2017)
Article
Biodiversity Conservation
Elena Eriksen, Mats Huserbraten, Harald Gjosaeter, Frode Vikebo, Jon Albretsen
Article
Ecology
Soledad Alvarez, Ignacio Gestoso, Patricio Ramalhosa, Joao Canning-Clode
Summary: The introduction of non-indigenous species poses a threat to coastal biodiversity, with maritime traffic as a primary vector. This study compares the performance of three methods and evaluates their attributes to develop improved strategies for monitoring and mitigating the impact of non-indigenous species.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)
Article
Ecology
Ya-Qin Zhang, Chun-Hui Gong, Xiang-Hua Qi, Wen-Jun Wang, Peng-Tao Cao, Qiang Li, Peng Wang, Yi Yang
Summary: This study investigated the concentrations of heavy metals in marine organisms from Gaogong Island in Lianyungang and evaluated the associated health risks. The results showed significant variations in heavy metal concentrations among different sampling months and marine organisms. However, the assessed health risks from consuming these marine organisms were found to be within acceptable thresholds.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)
Article
Ecology
Bo Yang, Huina Zheng, Zhouping Cui, Hao Sun, Baolin Liao, Ziqiang Xie, Bogui Chen, Jin Zhou, Baohua Xiao
Summary: This study found that coral transplantation on the "chessboard" reef and natural substrate in Dapeng Bay was successful, with corals on the reef showing better growth advantage. Temperature and suspended particulate matter were identified as the main factors affecting the health and growth of transplanted corals.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)
Review
Ecology
Bilal Mghili, Mohamed Ben -Haddad, Ouafae Zerrad, Nelson Rangel-Buitrago, Mustapha Aksissou
Summary: This review critically analyzes the available literature on plastic pollution in Morocco's marine environment. It discusses the abundance, composition, and sources of plastic litter, as well as the impact on the biota and ecosystem services. The review highlights the limited studies conducted and the scarcity of data, particularly regarding the prevalence of microplastics. It also emphasizes the considerable threat plastic litter poses to Moroccan biodiversity.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)
Article
Ecology
Khaled M. Abdelsalam, Mohamed F. Nour Eldeen, Mohamed H. Mona, Fayez A. Shoukr, Mona M. El Gamal
Summary: This research paper investigates the biodiversity of macro-benthic invertebrates collected along the eastern coast of Egypt. The study found a total of 118 taxa, with Mollusca being the most diverse and Arthropoda being the most dominant phylum. The most prevalent species was the stomatopod Erugosquilla massavensis. Eleven species were newly recorded in the Egyptian Mediterranean Sea. It is recommended to establish national monitoring programs to record any new alien species in the study area.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)
Article
Ecology
Haruka Nakano, Maria Belen Alfonso, Suppakan Jandang, Keiri Imai, Hisayuki Arakawa
Summary: This study evaluated the level of microplastic pollution in marine environments around Japan using the pollution load index, polymer risk index, and pollution risk index. The results showed low to moderate pollution levels in each area, but predicted an increase in pollution levels in the future. The study highlights the importance of taking action to prevent additional plastic pollution and the need for continued monitoring of microplastics in the environment.
REGIONAL STUDIES IN MARINE SCIENCE
(2024)