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Found 10 records similar to Toxicity of the pharmaceuticals finasteride and melengestrol acetate to the mayfly Hexagenia spp.

Federal

The toxicity of pharmaceuticals finasteride (FIN) and melengestrol acetate (MGA) was assessed in chronic (42 days) sediment tests with the amphipod Hyalella azteca. Two tests were completed for each compound. Survival, growth, reproduction and sex ratio were assessed at the end of each test.

Last Updated: Jan. 24, 2022
Date Published: Nov. 25, 2021
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  amphipod, Hyalella azteca, sediments, toxicity, pharmaceuticals, finasteride, Melengestrol acetate, The New Substances Assessment and Control Bureau (NSACB), Environment
Federal

The toxicity of pharmaceuticals finasteride (FIN) and melengestrol acetate (MGA) was assessed in freshwater mussels, including an acute (48 h) aqueous tests with glochidia from Lampsilis siliquoidea, a sub-chronic (14 days) sediment test with gravid female Lampsilis fasciola, and chronic (21 and 28 days) sediment tests with juvenile L. siliquoidea. Glochidia viability was assessed in the 48 hour test; behaviour and glochidia viability were assessed in the 14 day test; and survival and burial was assessed in the 21 and 28 day tests.

Last Updated: Jan. 18, 2022
Date Published: Nov. 25, 2021
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  Freshwater mussel, Lampsilis siliquoidea, Sediment, Toxicity, Pharmaceuticals, Finasteride, Melengestrol acetate, Lampsilis fasciola, The New Substances Assessment and Control Bureau (NSACB)
Federal

The toxicity of pharmaceuticals finasteride (FIN) and melengestrol acetate (MGA) was assessed in freshwater mussels, including acute (48 h) aqueous tests with glochidia from Lampsilis siliquoidea, a sub-chronic (14 days) sediment test with gravid Lampsilis fasciola, chronic (28 days) sediment tests with juvenile L. siliquoidea, and in chronic (42 days) sediment tests with the amphipod Hyalella azteca and the mayfly Hexagenia spp. Testing with mussels assessed survival (glochidia, juvenile mussels), burial ability (juvenile mussels), and filtering and luring behaviour, and viability of brooding glochidia (gravid mussels). Testing with amphipods assessed survival, growth, reproduction and sex ratio. Testing with mayflies assessed survival and growth.

Last Updated: Jun. 15, 2022
Date Published: Oct. 18, 2021
Organization: Environment and Climate Change Canada
Formats: HTML CSV
Keywords:  Freshwater mussel (Lampsilis siliquoidea), Amphipod (Hyalella azteca), Freshwater mussel (Lampsilis fasciola), Mayfly (Hexagenia spp.), Sediment, Toxicity, Pharmaceuticals, Finasteride, Melengestrol acetate
Federal

Neonicotinoid insecticides are environmentally persistent and highly water-soluble, and thus are prone to leaching into surface waters where they may negatively affect non-target aquatic insects. Most of the research to date has focused on imidacloprid, and few data are available regarding the effects of other neonicotinoids or their proposed replacements (butenolide insecticides). The objective of this study was to assess the toxicity of six neonicotinoids (imidacloprid, thiamethoxam, acetamiprid, clothianidin, thiacloprid, and dinotefuran) and one butenolide (flupyradifurone) to Hexagenia spp. (mayfly larvae).

Last Updated: Jul. 29, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  mayfly (Hexagenia spp.), neocotinoid, sublethal effects, toxicity, Biochemicals
Federal

The dataset contains the results of a study examining the use of different flow-rate hood fans in reducing air pollution exposure during and after cooking. Tests were carried out in the Canadian Centre for Housing Technology's twin research houses, in Ottawa, Ontario. The same cooking protocol was conducted 60 times on a gas stove, testing 6 different flow rates on three different over-the-range exhaust fans, while continuously measuring ultrafine particles (UFP), Fine Particulate Matter (PM2.5), Nitrogen dioxide (NO2), and Nitrogen monoxide (NO). The fan was operated during cooking for all tests and then either turned off or left on after cooking for the duration of the three hour test.

Last Updated: Sep. 14, 2021
Date Published: Aug. 26, 2021
Organization: Health Canada
Formats: XLSX CSV TXT
Keywords:  Indoor air quality, Cooking, Fine particulate matter (PM2.5), Ultrafine particles (UFP), Nitrogen dioxide (NO2), Nitrogen monoxide (NO), Gas stove.
Federal

Radon is a radioactive gas that comes from uranium in the ground that can get into your home undetected. You can’t see it, smell it or taste it. All homes have some level of radon. The question is how much and the only way to know is to test.

Last Updated: Jan. 27, 2021
Date Published: Mar. 17, 2020
Organization: Health Canada
Formats: HTML
Keywords:  Randon, radioactive gas, health risk, test
Provincial

Get a list of COVID-19 assessment centres. Before you go, you should check if: * The centre is open * They have drive-through or walk-in testing * They will test small children or babies * You need to make an appointment * You need to speak to a staff member about your condition (prescreening) All assessment centres will test you if you would like to be tested. Call the assessment centre or your local public health unit if you have questions. You do not need a health (OHIP) card for a test.

Last Updated: Jul. 21, 2022
Date Published: May 29, 2020
Organization: Government of Ontario
Formats: HTML JSON CSV other
Keywords:  Government and Finance, Health, coronavirus, covid, testing, covid-19 testing locations, COVID-19
Federal

These data contain the results of chronic toxicity tests with perfluorooctanoic acid (PFOA) to Hyalella azteca and Fathead minnow (Pimephales promelas) to set a PFOA freshwater target concentration for cleanup of industrial sites. Citation: Bartlett AJ, De Silva AO, Schissler DM, Hedges AM, Brown LR, Shires K, Miller J, Sullivan C, Spencer C, Parrott JL. 2021. Lethal and sublethal toxicity of perfluorooctanoic acid (PFOA) in chronic tests with Hyalella azteca (amphipod) and early-life stage tests with Pimephales promelas (fathead minnow).

Last Updated: Aug. 2, 2022
Date Published: Aug. 28, 2018
Organization: Environment and Climate Change Canada
Formats: HTML CSV
Keywords:  Water quality, Environment, Fathead minnow (Pimephales promelas), Hyalella azteca, Amphipod, perfluorooctanoic acid (PFOA), toxicity, Environmental protection operations
Federal

Health Canada carries out testing and research in its investigation of chemical, flammability, mechanical and electrical hazards of consumer products. We also develop and share test methods with industry and private laboratories.

Last Updated: Mar. 2, 2021
Date Published: Sep. 18, 2018
Organization: Health Canada
Formats: HTML
Keywords:  consumer products, product safety testing, testing and research, investigation of chemical, flammability, mechanical and electrical hazards, test methods
Federal

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.

Last Updated: Feb. 21, 2022
Date Published: Sep. 10, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  fish embryo toxicity tests, embryo, bioassay, tissue culture plate, embryo movement, methodology development, fish development, Chemicals Management Plan (CMP), Contaminants
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