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Found 10 records similar to Novel brominated flame retardants and dechloranes in three fish species from the St. Lawrence River, Canada

Federal

Aquatic systems near major urban centers are constantly contaminated with effluent from wastewater treatment plants (WWTP). Pharmaceuticals are part of the contamination and several classes of drugs have been detected in surface waters in the last decade. To better understand the impact of those pharmaceuticals in ecosystems, the exposure to aquatic species needs to be investigated. This study presents a new simple and rugged quantitative method for the determination of several classes of drugs using plasma from Northern Pike (Esox lucius) environmentally exposed to a major but highly diluted urban effluent.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Îles de Boucherville, Îlet Vert, Northern Pike (Esox lucius), Pharmaceuticals, fish, blood plasma, Wastewater Treatment Plant (WWTP), St. Lawrence Action Plan (SLAP)
Federal

The specific composition, biomass, vertical distribution and metal content of submerged and emergent aquatic plants in the St. Lawrence were evaluated. The riparian vegetation community of the St. Lawrence is characterized by the presence of extensive wetlands in the floodplain, a border of emergent plants and vast underwater meadows dominated by American wild celery (Vallisneria americana), a strong indicator species of metal concentration.

Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

For more information on SLAP, please visit https://www.canada.ca/en/environment-climate-change/services/environmental-funding/ecosystem-initiatives/st-lawrence-action-plan.html

Last Updated: Feb. 21, 2022
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  submerged aquatic vegetation, emergent aquatic vegetation, Vallisneria americana, macrophyte, metals, indicator, St. Lawrence Action Plan (SLAP), Environment
Federal

Information received in response to the data gathering initiative on certain organic flame retardants (2013)

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 organic flame retardant substances, which was published in the Canada Gazette in March 2013. 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. To complement this summary, a compilation of the non-confidential information received is available for download in various formats.

Last Updated: Feb. 23, 2022
Date Published: Jun. 9, 2017
Organization: Environment and Climate Change Canada
Formats: DOC HTML PDF CSV XLS
Keywords:  Chemical industry, Canada Gazette, data gathering, section 71, s.71, Canadian Environmental Protection Act, CEPA 1999, chemical substances, substance grouping initiative
Federal

The epiphytic cyanobacterium Gloeotrichia pisum forms spherical colonies embedded in a gelatinous matrix that is attached to submerged aquatic vegetation. In surveys of two fluvial lakes of the St. Lawrence River conducted in 2006–2007, growth conditions and diazotrophic ability in conjunction with the biomass and condition of its supporting macrophyte, Vallisneria americana, were examined. G. pisum integrates complex, temporally variable water-quality characteristics that are dependent upon hydrology and water residence time, thus acting as an early warning indicator of incipient habitat degradation that may lead to cyanobacterial proliferation and low biomass of vascular macrophytes. Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

Last Updated: Jul. 29, 2021
Date Published: Mar. 26, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  St. Lawrence River, Lake Saint-Pierre, Lake Saint-Louis, epiphytic cyanobacteria, Gloeotichia pisum, Vallisneria americana, nitrogen depletion, indicator, St. Lawrence Action Plan (SLAP)
Federal

In this study, seven non‐specific biomarkers were compared in Spottail Shiners (Notropis hudsonius Clinton) from localities receiving urban and industrial effluents and relatively clean localities in the St Lawrence River, Canada. Pigmented macrophages are involved in a variety of functions including the detoxification and recycling of exogenous and endogenous material, responses to foreign material or infectious agents, and antigen recognition. Pigmented macrophage aggregates are focal accumulations of pigmented macrophages found in the spleen, kidney, liver and other organs of fishes. They may respond to toxicants or exposure to infectious agents such as viruses or bacteria either by increasing in number and size or by changing the shape of the aggregation.

Last Updated: Jul. 29, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Spottail Shiner (Notropis hudsonius), Fish, parasite communities, St. Lawrence Action Plan (SLAP), pigmented macrophages, St. Lawrence River, Parasites, Environment, Biota
Federal

Increased productivity from sewage effluents can enhance species richness locally. Results from a study of Spottail shiners (Notropis hudsonius) in 1999 showed that prevalence and the mean number of myxozoan parasite species per host were higher downstream of the wastewater outflow from the Island of Montreal than upstream in the St. Lawrence River, Quebec, Canada. This was attributed to organic enrichment of the sediments which presumably lead to increased densities of oligochaetes, the alternate hosts, downstream of Montreal. Spottail shiners subsequently were collected every August/early September in 2001–2004 to examine the stability and repeatability of these patterns.

Last Updated: Jul. 28, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Spottail Shiner (Notropis hudsonius), Fish, parasite communities, Myxozoans, St. Lawrence Action Plan (SLAP), St. Lawrence River, Parasites, Environment, Biota
Federal

Parasite communities were examined in Johnny Darters (Etheostoma nigrum) collected from five localities in the St. Lawrence River in southwestern Quebec: two reference localities, one polluted locality upstream of the Island of Montreal and downstream of industrial and agricultural activity, and two polluted localities downstream of the Island of Montreal in the plume from the wastewater treatment facility. Fish from the upstream polluted locality had the highest parasite species richness and total parasite numbers, and fish from the downstream polluted localities the lowest. Differences between reference and polluted localities were mainly due to higher abundances of the brain-encysting trematode, Ornithodiplostomum sp., at the reference localities. Differences between upstream and downstream polluted localities were mainly due to a higher diversity and abundance of trematodes in fish at the upstream locality

Supplemental Information

The St. Lawrence Action Plan (SLAP) 2011 to 2026 (see http://planstlaurent.qc.ca/en/home.html) is the latest Canada-Quebec Agreement on the St. Lawrence and builds on the four previous agreements implemented since 1988.

Last Updated: Feb. 5, 2019
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Johnny Darter (Etheostoma nigrum), Fish, parasite communities, St. Lawrence Action Plan (SLAP), St. Lawrence River, Parasites, Environment, Biota, Nature and Biodiversity - Contaminants
Federal

The Richelieu River, Quebec, is a highly-regulated waterway subject to numerous anthropogenic influences from municipal effluents and agricultural activities. Parasite communities in 234 spottail shiners (Notropis hudsonius) were examined from 4 localities in late spring 2003 and 2004. Parasite component community similarity among localities could not be directly linked to available upstream water quality measurements or anthropogenic activity and was best explained by precipitation. This study suggests that fish parasite species composition and richness in the Richelieu River are influenced by environmental parameters which in turn ultimately are driven by a combination of climatic conditions and anthropogenic activities in the watershed.

Last Updated: Jul. 29, 2021
Date Published: May 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Spottail Shiner (Notropis hudsonius), Fish, parasite communities, precipitation, St. Lawrence Action Plan (SLAP), Richelieu River, Parasites, Environment, Biota
Federal

Concentrations of alternative flame retardants and polybrominated diphenyl ethers (PBDEs) were analyzed in ringed seal (Phoca hispida) blubber collected across the Canadian Arctic during subsistence hunts between 1998 and 2013. The presence of flame retardants in ringed seals suggests their persistence and their continuous inputs in the Canadian Arctic environment. Monitoring and research on the effects of these contaminants in seals are warranted given the importance of this species in Arctic marine food webs and for local communities. Supplemental Information

The Northern Contaminants Program (NCP, http://www.science.gc.ca/eic/site/063.nsf/eng/h_7A463DBA.html) was established in 1991 in response to concerns about human exposure to elevated levels of contaminants in wildlife species that are important to the traditional diets of northern Aboriginal peoples.

Last Updated: Jul. 22, 2021
Date Published: May 22, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Nature and Biodiversity - Contaminants, Arctic
Federal

The Canadian Environmental Sustainability Indicators CESI program provides data and information to track Canada's performance on key environmental sustainability issues. The Polybrominated Diphenyl Ethers PBDEs in Fish and Sediment indicators identify the drainage regions where concentrations are within or have exceeded the Federal Environmental Quality Guidelines FEQGs for PBDEs in fish and sediment. The FEQGs were developed under the Chemicals Management Plan and are used in various ways. In this report they are used to evaluate the significance of monitoring data.

Last Updated: Jan. 7, 2019
Date Published: Jan. 28, 2015
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  environmental indicators, water, water quality, pressures on water quality, water pollution, fish, fish tissue, sediment, chemicals
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