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Found 10 records similar to Chronic toxicity of azo and anthracenedione dyes to embryo-larval life stages of the Fathead minnow (Pimephales promelas)
Azo dyes are synthetic compounds used as industrial colorants, and some are predicted to be inherently toxic, bioaccumulative, and/or persistent based upon their chemical composition. This study addressed data gaps in current research which included the need to evaluate the toxicity of hydrophobic azo dyes to benthic invertebrates. The toxicity of a solvent dye, Sudan Red G (SRG), and two disperse dyes, Disperse Yellow 7 (DY7) and Disperse Orange 13 (DO13), to Hexagenia spp. and Tubifex tubifex was assessed in spiked-sediment exposures.
Propranolol is a human pharmaceutical b-blocker that has been detected in municipal wastewater effluents in low concentrations. To assess the potential of this compound to affect fish, Fathead minnow (Pimephales promelas) were exposed for a life cycle in a flow-through system to nominal propranolol concentrations. During the 162-day to 165-day exposure, no significant changes in weights or lengths were seen in Fathead minnows, although the highest concentration of propranolol did cause a 15% decrease in survival of larval and juvenile stage fish compared with controls. At maturity, there were no significant changes in condition factor, liver-somatic index, or secondary sex characteristics in propranolol-exposed male or female fish.
Substituted diphenylamine antioxidants (SDPAs) and benzotriazole UV stabilizers (BZT-UVs) are additives used in industrial and consumer products to prevent degradation or colour change of materials, but their environmental fate and disposition are not well characterized. In this study, SDPAs and BZT-UVs were analyzed in liquid and solid samples collected from wastewater treatment plants (WWTPs) in Canada to investigate the occurrence and fate of these contaminants. SDPAs and BZT-UVs were effectively removed from the liquid stream in most WWTPs mainly through sludge sorption and separation, but biotransformation, UV treatment and filtration may also contribute to removal of some contaminants in advanced treatment plants. In contrast, the removal efficiency of target contaminants using chemically assisted primary treatment was low, likely due to the short hydraulic retention time of this site.
Substituted phenylamine antioxidants (SPAs) are used in the production of a variety of consumer products (lubricants, dyes, and polymers). Substituted phenylamine antioxidants (SPAs) increase the life of consumer products by preventing the chain reaction of free radical production initiated by exposure to heat, oxygen, ozone, radiation and stress. It is important to consider that based on their physicochemical properties, substituted phenylamine antioxidants (SPAs) are likely to partition into sediment when they enter an aquatic system. Thus the most likely environmentally relevant pathway for fish to become exposed to SPAs would be through contaminated sediment.
Venlafaxine is an antidepressant and anti-anxiety drug that has been detected in municipal wastewater at low micrograms per litre (ug/L) concentrations. In this study, the nest-defense behavior of adult male fathead minnows (Pimephales promelas) was observed in fish exposed for a full lifecycle to venlafaxine nominal concentrations. Nest-defense behaviors quantified were the time taken to contact a dummy intruder fish (on a flexible stick, held near each nest) and the number of contacts made during a 1 minute period. This study is the first to assess reproductive behaviors in fish exposed to an antidepressant over a full lifecycle.
In 2006, the Government of Canada initiated the Chemicals Management Plan (CMP), which takes action regarding chemicals that are harmful to human health or the environment. One element of the CMP is Monitoring and Surveillance, which generates data on the presence and levels of chemical substances in environmental matrices. These data are used to make decisions regarding the best approach to protect Canadians and their environment from risks these substances might pose. In support of the CMP, a wastewater monitoring program was initiated in 2009 to generate data on priority substances that may be released to the environment.
Venlafaxine is an antidepressant and anti-anxiety drug that has been detected in municipal wastewater at low concentrations. To assess the potential of this compound to affect the survival, development and reproductive capacity of fish, we exposed Fathead minnow (Pimephales promelas) over a full lifecycle in a flow-through system to nominal venlafaxine concentrations. During the 167–168 day exposure, no significant changes were observed in survival, or the weights and lengths of Fathead minnows. At maturity, there were no significant differences relative to controls in condition factor, liver-somatic index, or secondary sex characteristics in the venlafaxine exposed male or female fish.
Information received in response to the notice with respect to certain aromatic amines and aromatic azo and benzidine-based substances (2011). To increase transparency and to facilitate access to information on substances in commerce in Canada, the Government of Canada is providing the summary of the information received in response to the Notice with respect to certain aromatic amines and aromatic azo- and benzidine-based substances, which was published in the Canada Gazette in December 2011. The data gathering was conducted under the Substance Groupings Initiative of the second phase of the Chemicals Management Plan (CMP), to support risk assessment and risk management activities for these substances. The information gathered under this initiative includes general information on what was received including the type of submission, the main substances reported, activities, substance functions and commercial uses reported, the main industrial sectors involved, and the scientific studies reported for each substance.
Fathead minnow (Pimephales promelas) embryos and larvae are frequently used in toxicology, including short-term embryo-only tests which often use small volumes of test solution. The effect that such conditions may have on Fathead minnow development has yet to be explicitly described. Here we compared rates of embryonic development in Fathead minnow embryos reared under standard light and temperature conditions with a range of possible methods. All methods yielded excellent control survival.
This data set contains concentrations of triclosan in wastewater Influent (INF), Effluent (EFF), Landfill Leachate (LCH), Biosolids (BIOS) and Sludge (SLG) sampled from various Wastewater Treatment Plants (WWTP's) and Landfills across Canada.