As a result of nuclear accidents and weapons tests, the radionuclides Cs-137 Sr-90 are common contaminants in aquatic ecosystems. Concentration ratios (CR) based on concentrations stable Cs Sr biota media used for estimation transfer their radioisotopes radiation dose calculations environmental human safety assessments. Available element-specific CRs vary by over an order magnitude similar organisms, thus affecting estimates proportionally. The variation could be reduced if they were better...

A method was developed for the extraction of lipids and analysis halogenated phenols alkylphenols in marine organisms. The efficiency evaluated by comparing extractable lipid content recovery 13 added from three different species (herring, cod, blue mussel), with corresponding results well-established procedures, Bligh Dyer (B&D), Smedes (S), Jensen (J) methods. J new method, centrifugation (Jc), gave phenol recoveries 80-100% all species, whereas B&D S methods relatively low most acidic...

Thiamine deficiency is a large contributor to reduced reproduction success among salmonids throughout the northern hemisphere. In Scandinavia, this disorder known as M74; while in North America, it early mortality syndrome (EMS). The fluctuates magnitude from year year. During years with high prevalence of disorder, salmonid hatcheries that stock various aquatic systems maintain population size experience difficulties filling their quotas without thiamine treatment alevins. monitored both by...

Persistent and semi-persistent halogenated compounds cause health problems for the animals occupying upper level of food web in Baltic Sea. Atlantic salmon (Salmo salar), being a top piscivore Sea, has been observed to carry large body burden toxins. Here, mixture nine belonging different groups was created, based on composition toxins serum. The toxicokinetic properties were studied zebrafish (Danio rerio) embryos achieve same proportions between internal doses as salmon. Toxicity evaluated...

Abstract The growing knowledge of the impact halogenated phenolic compounds on hormonal and metabolic systems has led to an increased interest in exposure potential effects these wildlife. In present study, a screening procedure was developed detect quantify serum plasma from marine A mass spectral library containing selective ion monitoring data created using gas chromatography electron capture negative ionization spectrometry. were accompanied with retention indices increase specificity...

Abstract Standard aquatic toxicity tests of chemicals are often limited by the chemicals’ water solubility. Liposomes have been widely used in pharmaceutical industry to overcome poor pharmacokinetics and biodistribution. In this work, liposomes were synthesized an ecotoxicological context, as a tool assure stable dosing technically challenging zooplankton. Three with distinctly different characteristics successfully incorporated into liposomes: Tetrabromobisphenol A (TBBPA, log K ow 5.9, p...

The Baltic Sea is one of the world's most contaminated seas with long-standing adverse health status its wildlife such as salmon, resulting in reduced fecundity and increased mortality. While effects have been reported among wild fish from Sea, toxicity mechanisms underlying these adversities, chemical effect drivers mediating them are poorly understood. To address this knowledge gap, we utilized zebrafish (Danio rerio) embryo model to determine molecular functional brought on by exposure a...

Abstract Over the last two decades, occurrence of hydroxylated polybrominated diphenyl ethers (OH-PBDEs) has been observed to be nearly ubiquitous among Baltic Sea filamentous macroalgae. High concentrations are continuously recorded red, green, and brown algae. Several these algae species ephemeral, when large parts colonies decay at end their lifecycles, OH-PBDEs expected largely partition sediment. In this study, fate in sediment was investigated, with focus on effect reductive...

In the disturbed Baltic Sea ecosystem, several animal species display failing health related to exposure toxic compounds, reduced energy metabolism and immune system disorders. order investigate possible associations between fish chemicals affecting defence, levels of algal toxins (bromophenols, hydroxylated polybrominated diphenyl ethers nodularin), perfluorinated alkyl substances (PFAS) thiamine (vitamin B1) were determined in European flounder (Platichthys flesus). Several biomarkers...