http://www.setacjournals.org SETAC Journals EarlyView RSS Feed http://www.setacjournals.org/details/journalArticle/1458023/Time_to_get_off_the_fence_The_need_for_definitive_international_guidance_on_stat.html Abstract The use of the no observed effect concentration (NOEC) and lowest observed effect concentration (LOEC) in ecotoxicology has been consistently criticised for over 30 years. A search of the literature from the past 30 years found 22 articles challenging the validity and/or appropriateness of NOEC/LOEC data compared to only one in defence of such data. Notwithstanding this compelling weight of evidence, the NOEC and LOEC... 2012-02-03T00:00:00Z http://www.setacjournals.org/details/journalArticle/1455513/In_situ_remediation_of_contaminated_sediments_using_carbonaceous_materials_A_cri.html Abstract Carbonaceous materials (CM) such as activated carbons (AC) or biochars have been shown to significantly reduce pore water concentrations and risks by binding hydrophobic organic compounds (HOCs) present in aquatic sediments. In the present study, the authors review the current state of the art use of CM as an extensive method for sediment remediation, covering both technical and ecological angles. The review addresses how... 2012-01-30T00:00:00Z http://www.setacjournals.org/details/journalArticle/1455515/Structural_and_functional_changes_in_gill_mitochondrial_membranes_from_the_Medit.html Abstract The use of tributyltin (TBT) as a biocide in antifouling paints leads to a ruinous input of this contaminant in the aquatic environment. Human exposure to TBT mainly occurs through ingestion of contaminated seafood like filter‐feeding mollusks. Tributyltin is known to act as a membrane‐active toxicant, especially on mitochondria, on different targets and by different mechanisms. Tributyltin effects on the fatty acid... 2012-01-30T00:00:00Z http://www.setacjournals.org/details/journalArticle/1454697/Titanium_dioxide_nanoparticles_detoxify_pirimicarb_under_UV_irradiation_at_ambie.html Abstract Titanium dioxide nanoparticles (nTiO2) form reactive oxygen species (ROS) under irradiation by ultraviolet light (UV). This known photocatalytic activity may finally affect the presence and toxicity of organic environmental chemicals, which have not yet been studied at ambient UV intensity. The authors used a three‐factorial design to evaluate the interaction of the carbamate insecticide pirimicarb (initial nominal ... 2012-01-27T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452527/A_risk_assessment_for_adult_butterflies_exposed_to_the_mosquito_control_pesticid.html Abstract A prospective risk assessment was conducted for adult butterflies potentially exposed to the mosquito control insecticide naled. Published acute mortality data, exposure data collected during field studies, and morphometric data (total surface area and fresh body weight) for adult butterflies were combined in a probabilistic estimate of the likelihood that adult butterfly exposure to naled following aerial applications... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452529/Comparing_predicted_against_measured_steroid_estrogen_concentrations_and_the_ass.html Abstract Predicted concentrations of estrone, 17β‐estradiol, and 17α‐ethinylestradiol generated from a geographical information system‐based model (LF2000‐WQX) have previously been used to assess the risk of causing intersex in male fish in the rivers of England and Wales. Little measured data of sufficient quality and spatial extent have been available to verify this risk assessment. New measured data have been collected from... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452531/Neurotoxicity_of_two_Cylindrospermopsis_raciborskii_cyanobacteria_strains_to_mic.html Abstract In recent decades, toxic cyanobacterial blooms have becoming frequent in drinking water supply and have caused serious deleterious effects to domestic and wild animals, as well as humans. Two strains of the cyanobacterium species, Cylindrospermopsis raciborskii (T2 and T3), were isolated from the Billings reservoir (São Paulo, Brazil) and cultured in the laboratory for use in acute toxicity tests with mice, micro crustaceans, and fish.... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452533/Comparative_effects_of_the_herbicides_chlortoluron_and_mesotrione_on_freshwater_.html Abstract Extensive use of herbicides in agriculture is accompanied by the risk of environmental contamination of aquatic ecosystems. The present study shows in detail the effects of the herbicides chlortoluron and mesotrione on three microalgae species: two chlorophyceae (Pediastrum tetras, Ankistrodesmus fusiformis) and one diatom (Amphora coffeaeformis). The authors calculated the IC50 of one chlorophyceae and the diatom. The order of... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452535/Tissue_distribution_and_human_exposure_of_perfluorinated_compounds_by_consumptio.html Abstract In the present study, the levels of 14 perfluorinated compounds (PFCs) were analyzed in the blood, liver, muscle, brain, and eggs of popular farmed freshwater fish from Beijing. Perfluorooctane sulfonate (PFOS) was the predominant compound in all samples, with the highest concentration at 70.7 ng/g wet weight. The highest mean levels of PFOS in all tissues were observed in bighead (1.48‐22.5 ng/g wet wt) and the lowest in... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452537/Survival_mobility_and_membranebound_enzyme_activities_of_freshwater_planarian_Du.html Abstract Surfactants are a major class of emerging pollutants widely used in large quantities in everyday life and commonly found in surface waters worldwide. Freshwater planarian was selected to examine the effects of different surfactants by measuring mortality, mobility, and membrane‐bound enzyme activities. Among the 10 surfactants tested, the acute toxicity of betaine and polyethylene glycol (PEG‐200) to planarians were... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452539/Effects_of_progesterone_on_reproduction_and_embryonic_development_in_the_fathead.html Abstract High concentrations (375 ng/L) of the steroid hormone progesterone (P4) were measured in snowmelt runoff associated with large livestock feeding operations in Wisconsin. To gain insights into the potential endocrine disrupting effects of P4 in fish, experiments were conducted to evaluate the effects of short‐term exposure to environmentally relevant concentrations of P4 on reproduction and embryonic development in the... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452541/Bioaccumulation_of_waterborne_Ni_in_Dreissena_polymorpha__A_stable_isotope_exper.html Abstract The effect of Ca, Zn, and dissolved natural organic matter (NOM) on waterborne Ni accumulation was investigated in a freshwater mussel. An enriched stable metal isotope tracer was required to accurately measure the Ni uptake rate. Zebra mussels were exposed to environmentally relevant concentrations of 62Ni (from 0.5‐8µg/L) for 48 h in media spiked with Ca, Zn, or dissolved NOM. The 62Ni uptake was inhibited by Ca (from 0.138 ± 0.021... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452543/Effects_of_fish_on_mercury_contamination_of_macroinvertebrate_communities_of_gra.html Abstract Mercury is an environmental contaminant that negatively affects the health of vertebrate consumers such as fish, birds, and mammals. Although aquatic macroinvertebrates are a key link in the trophic transfer of Hg to vertebrate consumers, Hg contamination in macroinvertebrate communities has not been well studied. The purpose of the present study was to examine how Hg in macroinvertebrate communities is affected by the... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452545/Acclimation_of_lifehistory_traits_to_experimental_changes_in_environmental_conta.html Abstract One adaptive mechanism aquatic populations use to facilitate tolerance to environmental contaminants is acclimation. Polychlorinated biphenyls are a globally ubiquitous class of persistent organic contaminants and have been linked to reproductive impairments in fish. The authors used female brown bullhead to test whether acclimation of reproductive life‐history traits occurs in response to changes in sum polychlorinated... 2012-01-25T00:00:00Z http://www.setacjournals.org/details/journalArticle/1452547/Impact_of_fullerene_particle_interaction_on_biochemical_activities_in_fermenting.html Abstract It has become a concern that increasing applications of fullerene (C60) particles for industrial, in particular, medical practices can pose potential risks to the ecosystem because of their excellent ability of electron uptake and reactivity in living organisms. In the present study, the authors explored the molecular interactions between bacterial cells and C60 nanoparticles: nano‐C60 aggregates and fullerenol, and their impact on... 2012-01-25T00:00:00Z