Methylmercury (MeHg) is a potent neurotoxin that bioaccumulates in seafood. Co-occurrence of selenium (Se) may affect the bioavailability and toxicity MeHg organisms. Here we report concentrations total mercury (Hg) Se 17 teleost fish species (n = 8459) sampled during 2006-2015 from North East Atlantic Ocean (NEAO) evaluate variation effects geography. Mean Hg concentration ranged 0.04 mg kg-1 ww mackerel (Scomber scombrus) blue whiting (Micromesistius poutassou) to 0.72 ling (Molva...

The contents of total arsenic and inorganic were determined in fillet samples Northeast Artic cod, herring, mackerel, Greenland halibut, tusk, saithe Atlantic halibut. In total, 923 individual fish analysed. mostly caught the open sea off coast Norway, from 40 positions. determination was carried out by inductively coupled plasma mass spectrometry following microwave-assisted wet digestion. high-performance liquid chromatography–ICP-MS dissolution samples. concentrations found for varied...

Iodine is a trace element required for the production of thyroid hormones, essential metabolism, growth and brain development, particularly in first trimester pregnancy. Milk lean fish are main dietary sources iodine Norwegian diet. Thus, aim present study was to provide updated analysed values concentration six species, 27 selected iodine-rich dairy foods hen’s eggs. The concentrations wild species varied between 18 μg/100 g (Atlantic halibut) 1,210 (pollack). cow milk 12 19 eggs 23 43 g....

Liver and muscle tissue of tusks (Brosme brosme) have been analyzed for their THg MeHg concentrations Hg isotopic signatures tracing pollution along the Norwegian coast. Clear differences between types locations were established. At five eight locations, concentration in exceeded maximum allowable level 0.5 mg kg–1 wet weight. δ202Hg values both indicated that speciation affects bulk signature. Tusk liver seems to be more sensitive immediate changes anthropogenic inorganic Hg, while rather...

Oily seafood is an important food source which contains several key nutrients beneficial for human health. On the other hand, oily also persistent organic pollutants (POPs), including dioxin-like compounds (DLCs) polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like-polychlorinated biphenyls (dl-PCBs), potentially detrimental to For a comprehensive comparison of adverse health effects consumption, risk-benefit analyses are necessary. Risk-benefit require...

Hardangerfjord is one of the longest fjords in world and has historical mercury (Hg) contamination from a zinc plant its inner sector. In order to investigate extent Hg transferred abiotic biotic ecosystem compartments, monomethylmercury (MeHg) concentrations were measured seawater, sediment, seafood commonly consumed by humans. Although total seawater been described previously, this investigation reports novel MeHg data for Norwegian fjords. Total biota increased towards point source...

Marine fish from the North East Atlantic Ocean (NEAO) are nutrient rich and considered a valuable economic resource. However, marine also major dietary source of several contaminants, including persistent organic pollutants (POPs) heavy metals. Using one world's largest seafood datasets (n > 25,000 individuals), comprising 12 commercially important species collected during 2006-2019 in NEAO, we assessed co-occurrence elements POPs, evaluated potential risks to human consumers. Several...

Bioaccumulation of persistent organic pollutants (POPs) in marine fish may pose a health risk to human consumers. Using data from ∼8400 individuals 15 species collected the North-East Atlantic Ocean (NEAO), we assessed concentrations individual POP congeners, including dioxins, polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs). POPs analyses were performed with accredited methods using high-resolution gas chromatography/high-resolution mass spectrometry,...

Brominated flame-retardants (BFRs) such as polybrominated diphenyl ethers (PBDE) and hexabromocyclododecane (HBCD) are considered hazardous to human health. Due their persistence, they still present in the environment biota seafood is major contributor of BFRs exposure. Here, we used data from >9700 samples wild farmed fish, fish feed ingredients collected North Atlantic between 2006 2016 aiming investigate factors influencing risk assessments BFRs. most representative number analyses, PBDEs...

Seafood plays a central role in global food and nutrition security. However, there is lack of data on the concentration nutrients contaminants fish other seafood, especially low- middle-income countries. In order to assess potential risks benefits associated with seafood intake, reliable up-to-date composition crucial. The quality affected by several factors, such as sampling protocols suitability methods applied for sample preparation analysis. this paper, we describe methodology related...

Primary production and species' lipid contents in Arctic ecosystems are notoriously seasonal. Additionally, seasonal migration patterns of fish may alter prey availability thus diet. Taking the southern Barents Sea as a study region PCBs model contaminants, we examined to what extent each these factors cause bioaccumulation change throughout year. Data on physiology standing stocks multiple trophic levels were used estimated season-specific carbon budgets by inference also corresponding...

Increased cadmium concentrations in claw meat were demonstrated after cooking and freezing practices of whole brown crabs. This was investigated crabs from two different locations along the Norwegian coast, one with normal high concentration. For both locations, crabs, samples fresh raw showed lowest values followed by raw-boiled frozen-thawed-boiled. Cadmium levels separately cooked claws comparable to low crab. Claws taken frozen before thawing had compared off carapace thawing. clearly...

Fish and seafood may play an important role for nutrition food security as they contain essential vitamins, minerals, fatty acids. The aim of this study was to describe the nutrient composition, including acids, amino in commonly consumed fish species (fillet- whole samples) sampled off Northwest African coast. Furthermore, we assessed species' contributions recommended intake (RNI) values from World Health Organization (WHO). Samples commercially (Sardina pilchardus, Engraulis encrasicolus,...

Hg pollution released from the U-864 submarine sunk during WWII and potential introduction of that into marine food chain have been studied by a combination quantitative MeHg determination isotopic analysis via cold vapor generation multicollector inductively coupled plasma-mass spectrometry (CVG-MC-ICP-MS) in sediment Cancer pagurus samples. The could be unequivocally linked with metallic present wreck. Crabs were collected at wreck location 4 nmi north south, their brown claw meat analyzed...

The Northeast Arctic cod (Gadus morhua) is the world's northernmost stock of Atlantic and considerable ecological economic importance. are widely distributed in Barents Sea, an environment that supports a high degree ecosystem resiliency food web complexity. Here using 121 years ocean temperature data (1900-2020), 41 sea ice extent information (1979-2020) 27 total mercury (Hg) fillet concentration (1994-2021, n = 1999, ≥71% Methyl Hg, 20) from Sea ecosystem, we evaluate effects climate...

Fillets from a total of 1245 Northeast Atlantic mackerel (Scomber scombrus) sampled in different fishing areas the during 2007–2016 were analysed for mercury, cadmium, arsenic and lead using ICPMS. Mercury levels varied <0.01 to 0.36 mg/kg wet weight (ww) with mean 0.046 ww significantly higher Skagerrak than North Sea, Norwegian Sea west Scotland. Cadmium concentrations <0.002 0.16 value 0.015 ww. Only 0.24 % fish exceeded EU's maximum cadmium respectively. Arsenic between 0.43 6.9 2.2...

Demand for n-3 polyunsaturated fatty acids (n-3 PUFAs) exceeds supply. Large-scale studies on effects of season and geography PUFAs in marine fish from the Northeast Atlantic Ocean (NEAO) may be used to optimize utilization improve nutrition security. Using a sinusoid model, seasonal cycles were determined found species-specific clearly pronounced pelagic zooplankton feeding species. The Greenland halibut showed very little variation. PUFA content North Sea autumn-spawning (NSAS) herring...

Abstract Chlorophyll a, meteorology and hydrography were sampled during a 3 year period in Altafjord Porsangerfjord. The analysis demonstrated decoupling between spring bloom progression the classical 'Sverdrup' regulators, i.e. there was no correlation biomass critical depth, mixed or station depth irradiance. only significant linear magnitude day length. We also observed correlations log chlorophyll irradiance heat flux. From early March to mid-May, length increases from 7 24 h area,...

Abstract In January 2006 it was reported from Russia that Greenland halibut (Reinhardtius hippoglossoides) caught in the Barents Sea had shown mercury levels exceeding European Union's upper limit of 0.5 mg/kg wet weight (ww) for this species. These findings were confirmed a small study same area. To gain more knowledge, larger initiated to investigate off coast northern Norway. A total 320 area May 2006. Individual fish filleted and analysed mercury, arsenic, cadmium lead. Round varied...

Brown crab Cancer pagurus is appreciated as seafood in several European countries. However, cadmium levels crabs can be elevated and their consumption may pose a hazard for human health. To assess if poses threat to food safety Norway, were sampled at two different locations along the Norwegian coast: one South of Norway North Norway. Cadmium determined tissues (claw meat, hepatopancreas inner meat). highlight specific risk factors cadmium, concentration was related exogenous (location,...

Mercury (Hg) pollution in the ocean is an issue of global concern, however bioaccumulation regimes this ubiquitous pollutant marine apex predators have important knowledge gaps. Our fish length and stable isotope (δ15N δ13C) normalized data Greenland halibut (GH) (Reinhardtius hippoglossoides) showed that Hg fillet tissue decreased by ~35–50 %, over a ten-year period from 2006 to 2015 (n = 7 individual sampling years). was predominantly methylmercury form (>77 %). Results Bayesian...