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Found 10 records similar to Monitoring of contaminants in ringed seals from the Canadian Arctic and Labrador

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 concentrations of contaminants in seawater influence what is detected in marine mammals and seabirds and levels and time trends of the contaminants in the ocean has been identified as a knowledge gap by the Northern Contaminants Program (NCP). Samples were analyzed for persistent organic pollutants (POPs) including brominated flame retardants (BFRs), perfluorinated substances and mercury. Repeated sampling at the same location and time of year will help develop temporal trend information for contaminants seawater. 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: Feb. 21, 2022
Date Published: Aug. 28, 2018
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  Arctic, Northwest Passage, North Open Polynya, Hudson Strait, Hudson Bay, Bering Strait, Chukchi Sea, Mackenzie Bay, Lancaster Sound
Federal

Ringed seals (Phoca hispida) have been used as bioindicator species of environmental contamination in Canada since the 1970s. In the present study, seals were harvested during subsistence hunts in four regions of the Canadian Arctic: Beaufort Sea, Arctic Archipelago, Hudson Bay, and coastal Labrador. An extensive suite of persistent organic pollutants (POPs) was determined in seal blubber collected for multiple years between 1972 and 2016. Results from this long-term study indicate geographical differences in the contaminant concentrations in seals and the significant general decrease of most POPs, including polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT) and related compounds, chlordanes (CHL), and hexachlorocyclohexanes (HCH) over time in ringed seals.

Last Updated: Jul. 29, 2021
Date Published: Jun. 4, 2019
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Northwest Territory, Inuvialuit, Nunavut, Nunavik, Nunatsiavut, Labrador, Canadian High Arctic, Northern Contaminants Program (NCP), community-based monitoring
Federal

The purpose of this study is to examine trends over time of mercury and other trace elements, as well as legacy and new persistent organic pollutants (POPs) in landlocked Arctic char collected annually from lakes near the community of Resolute Bay on Cornwallis Island (Amituk, Char, North, Small, and Resolute) and in Lake Hazen in Quttinirpaaq National Park on Ellesmere Island. The project is also examining links between climate warming and increases or decreases in mercury concentrations in landlocked char. Sampling of water and Arctic char was aided by local people between 2005 and 2007. Many scientific publications have been produced from this project, and results have been discussed in the Canadian Arctic Contaminants Assessment Report III (2013): Persistent Organic Pollutants in Canada's North, Canadian Arctic Contaminants Assessment Report III (2012): Mercury in Canada’s North, and the Synopsis of Research Conducted under the 2015–2016 and 2014-2015 Northern Contaminants Program.

Last Updated: Feb. 21, 2022
Date Published: Apr. 8, 2014
Organization: Environment and Climate Change Canada
Formats: PDF HTML
Keywords:  Northern Contaminants Program (NCP), Arctic Char, Fishes, Mercury, Contaminants, Persistent Organic Pollutants (POP), Char Lake, Cornwallis Island, Ellesmere Island
Federal

This dataset contains the ambient dissolved concentrations of organophosphate esters (OPEs) and polybrominated diphenyl ethers (PBDEs) in North Atlantic Ocean (Greenland Sea) as well as a summary of the passive polyethylene samplers (PEs) deployed. Organophosphate esters (OPEs) have been found in remote environments at unexpectedly high concentrations, but very few measurements of OPE concentrations in seawater are available, and non are available in subsurface seawater. Passive polyethylene samplers (PEs) deployed on deep-water moorings in the Fram Strait and in surface waters of Canadian Arctic lakes and coastal sites were analyzed for a suite of common OPEs. Organophosphate esters are poorly understood contaminants in remote marine environments.

Last Updated: Jul. 23, 2021
Date Published: Oct. 19, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Oceans, Environment, Biota, Nature and Biodiversity - Contaminants
Federal

Fisheries and Oceans Canada and Environment and Climate Change Canada (Northern Contaminants program) have been working with Nunavut community Hunters and Trappers Organizations and theNunavut Wildlife Management Board consistently since 1980 to collect samples from harvested ringed seals. The majority of seals were measured in the field by Inuit hunters who recorded date of kill, sex and blubber depth at sternum (0.5 cm). The data from the harvested animals are used to evaluate stressors and overall seal health, in the Canadian Arctic.

Last Updated: Sep. 14, 2020
Date Published: Jul. 1, 2020
Organization: Fisheries and Oceans Canada
Formats: PDF CSV ESRI REST
Keywords:  Marine Habitat, Arctic Ocean, Baffin Bay, Canadian Basin, Hudson Bay and James Bay, Hudson Strait and Ungava Bay, Fisheries resources, Mammals, Marine biology
Federal

This record contains two datasets: 1. Raw unfiltered geographic coordinates and accuracy estimates of ringed seals tagged in the Western Canadian Arctic and 2. The location estimate from state-space models using a 12-hr time step. In total, 17 ringed seals were captured, measured, weighed, and tagged with satellite-linked transmitters (SDR-10, SDR-16, SPLASH) in June and July of 1999, 2000, and 2010.

Last Updated: Oct. 28, 2021
Date Published: Oct. 4, 2021
Organization: Fisheries and Oceans Canada
Formats: PDF CSV ESRI REST
Keywords:  Seals/Sea Lions/Walruses, Beaufort Sea, Aquatic wildlife, Marine biology
Federal

This dataset contains concentrations of perfluoroalkyl substances (PFAS) in seawater sampled in various locations in the Arctic ranging from 2005-2008. Perfluoroalkyl acids (PFAAs) are ubiquitous contaminants of marine, freshwater and terrestrial environments, including remote arctic wildlife. Slow, and long-range oceanic transport from source regions in the northern hemisphere is hypothesized to be among the major pathways contributing to PFAA contamination in remote marine environments. The Arctic Ocean is influenced by Pacific and Atlantic seawater as well as riverine outflows.

Last Updated: Jul. 29, 2021
Date Published: Sep. 4, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Arctic, Bering Strait, Chukchi Sea, Mackenzie Bay, Amundsen Gulf, Coronation Gulf, Victoria Strait, Barrow Strait, Resolute Bay
Federal

This dataset contains 2005 concentrations of total mercury (THg), gaseous elemental mercury (GEM), methylated mercury, dimethyl mercury (DMHg) in the water column of the Canadian Arctic. Mercury in the Arctic is an important environmental and human health issue. The reliance of Northern peoples on traditional foods, such as marine mammals, for subsistence means that they are particularly at risk from mercury exposure. Mercury concentrations on biological organisms have increased since the onset of the industrial age and are controlled by a combination of abiotic factors, food web dynamics and structure, as well as animal behavior.

Last Updated: Jul. 29, 2021
Date Published: Aug. 28, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Arctic, Northwest Passage, North Open Polynya, Hudson Strait, Hudson Bay, Mercury, Northern Contaminants Program (NCP), Contaminants, Marine Food Web
Federal

Temporal trends and climate related parameters affecting the fate of legacy persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were examined in landlocked Arctic char from four lakes in the Canadian Arctic. Among biological parameters, lipid content was a key factor explaining the concentration of most POPs in Arctic char. Legacy PCBs and OCPs generally showed declining trends of concentrations in Arctic char, consistent with past restriction on uses and emissions of POPs. However, increases in lake primary productivity (measured as chlorophyll a) exerted a dilution effect on POPs concentrations in Arctic char.

Last Updated: Jul. 23, 2021
Date Published: Jun. 19, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Northern Contaminants Program (NCP), Arctic Char, Fishes, Persistent organic pollutants (POPs), Char Lake, Cornwallis Island, Ellesmere Island, Kent Peninsula, Lake Amituk
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