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Found 10 records similar to Contaminants in Colonial Waterbird Eggs - Wood Buffalo National Park
Aquatic bird eggs are being collected for contaminants analysis. Egg collections in the Peace-Athabasca Delta area support Parks Canada’s activities at Wood Buffalo National Park and the multi-stakeholder Peace-Athabasca Ecosystem Monitoring Program. This monitoring activity employs repeated censuses of birds and builds on initial egg collections made in 2009 from Egg Island (Lake Athabasca) and Wood Buffalo National Park, with the goal of evaluating contaminant burdens, contaminant sources and changes in sources through time. Egg samples are collected from colonial waterbirds California Gulls (Larus californicus), Herring Gulls (Larus argentatus), Ring-billed Gulls (Larus delawarensis), Caspian Terns (Hydroprogne caspia) and Common Terns (Sterna hirundo) and insectivorous birds Bank Swallows (Riparia riparia), Cliff Swallows (Petrochelidon pyrrhonota) and Tree Swallows (Tachycineta bicolor) to monitor health and contaminant levels of aquatic and terrestrial birds in the oil sands region and in reference areas.
Colonial Waterbird Health and Contaminants
This dataset contains metals, including total mercury levels, stable nitrogen isotope values, polycyclic aromatic hydrocarbons, and polychlorinated dibenzodioxin (PCDDs) and polychlorinated dibenzofuran (PCDFs) levels in eggs of seven species of colonial waterbirds (California Gull, Franklin’s Gull, Herring Gull, Ring-billed Gull, Caspian Tern, Common Tern and Forster's Tern). Data are available for 1977, 2009, and 2011 – 2015 for sites located in the Peace-Athabasca Delta/western Lake Athabasca. Geographic coverage was expanded in 2014 and 2015 to include additional egg collection sites across Alberta, Saskatchewan, and the Northwest Territories. While no applicable guidelines exist for these measurements, our expert assessment is that the observed levels of mercury are not likely to pose a risk to these bird populations.
These fish-eating colonial waterbirds breed and nest in colonies on islands in and around Fathom Five National Marine Park. Five species of colonial waterbird are monitored. These birds and their eggs are effective measures of environmental contamination and aquatic ecosystem health.
Monitoring of the number of eggs and nests for the tern. Field data from 1992 to 2019. Many islands in the MANPRC are used by the terns for their nesting. The presence and great abundance of this species are characteristic of the inland ecology of the park.
Monitoring of the number of eggs and nests for the Great black-backed and European herring gulls . Field data from 1996 to 2015. Many islands in the MANPRC are used by the Great black-backed and European herring gulls for nesting. The presence of this species is characteristic of the inland ecology of the park.
The second largest concentration of common terns (Sterna hirundo) in North America is found on Tern Islands, a set of three small barrier islands separated by water at high tide located within Kouchibouguac National Park. These seabirds are indicators for the condition of coastal, marine, as well as estuarine ecosystems due to the use of these nesting and/or breeding grounds, and their reliance on the distribution of small fish populations in lagoons or along the outer beaches of barrier islands throughout the breeding season. The purpose of the common tern colony monitoring program is to determine the annual total number of nests and estimate mean clutch size in order to evaluate long-term breeding population health. The methods for this measure involve an annual systematic census on Tern Islands over a 1-2 day period in mid-to late June during the late incubation stage.
Herring gull (Larus arentatus, HERG), great blue heron (Ardea Herodias GBHE), double-crested cormorant (Phalacrocorax auritus, DCCO) and ring-billed gull (Larus delawarensis, RBGU) have been monitored in Pukaskwa National Park since 1977 as part of the colonial waterbird monitoring program. A complete count of active nests on islands found along the ~120km of coast of Pukaskwa is conducted based on the Canadian Wildlife Service (CWS) protocol. The nest count is carried out during the peak of breeding over a period of 2-3 weeks. From 1977 – 1981, surveys were conducted annually and used an island numbering system (Old Colony Number in datasheet).
The data set provides official information from the Government of Canada pertaining to the imports of Eggs and Eggs Products into Canada, subject to controls under Canada's Export and Import Permits Act (EIPA). Available reports provide import permits issuance data for Eggs and Eggs Products on a quarterly/year-to-date basis.
Red-breasted mergansers (Mergus serrator) are colonial birds found on Tern Islands, a set of three small barrier islands separated by water at high tide located within Kouchibouguac National Park. These piscivorous sea ducks are indicators for the state of the breeding islands and associated marine or estuarine ecosystems, since nest distribution and productivity is closely related to habitat conditions such as the presence of marram grass (Ammophila breviligulata) in addition to sometimes sea lyme grass (Leymus mollis) or common yarrow (Achillea millefolium); while the occurrence of the species is also linked to the scope and abundance of fish resources. The purpose of the red-breasted merganser monitoring program is to determine the annual number of nesting attempts and to measure nest success, as these are important parameters that contribute to breeding population dynamics. The methods for this measure involve an annual census in mid-August where nests (i.e., a bowl with at least one egg) are located by systematically searching the vegetated regions on Tern Islands immediately following the completion of the breeding season.
Health Canada has notified Burnbrae Farms Ltd., that it has no objection to the food use of High Pressure Processing (HPP)-treated egg salad, egg dips, and egg spreads. The Department conducted a comprehensive assessment of these HPP-treated food products according to its Guidelines for the Safety Assessment of Novel Foods.