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Anthony J. Gaston
Carleton University
186Publications
43H-index
5,418Citations
Publications 186
Newest
#1Karen L. Foster (Trent University)H-Index: 9
#2Birgit M. Braune (Carleton University)H-Index: 34
Last.Mark L. Mallory (Acadia University)H-Index: 18
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Abstract The historic influence of interannual weather and climate variability on total mercury concentrations (THg) in the eggs of two species of Arctic seabird in the Canadian High Arctic was investigated. Time series of THg in the eggs of northern fulmars (Fulmarus glacialis) and thick-billed murres (Uria lomvia) from Prince Leopold Island span 40 years (1975–2014), making these among the longest time series available for contaminants in Arctic wildlife and uniquely suitable for evaluation of...
A recent review of bird distributions in Nunavut demonstrated that Mansel Island, in northeastern Hudson Bay, is one of the least known areas in the territory. Here, current information on the birds of Mansel Island is summarized. A list published in 1932 included 24 species. Subsequent visits by ornithologists since 1980 have added a further 17 species to the island’s avifauna. The list includes 17 species for which breeding has been confirmed and 10 for which breeding is considered probable. T...
#1Mark L. Mallory (Acadia University)H-Index: 3
#2Anthony J. Gaston (Carleton University)H-Index: 43
Last.Allison Patterson (McGill University)H-Index: 1
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The Canadian Arctic hosts millions of marine birds annually, many of which aggregate in large numbers at well-defined sites at predictable times of the year. Marine habitats in this region will be ...
#1Karen L. Foster (Trent University)H-Index: 9
#2Birgit M. Braune (Carleton University)H-Index: 34
Last.Mark L. Mallory (Acadia University)H-Index: 18
view all 4 authors...
Changing climate can influence the transport of chemical pollutants into Arctic regions and their fate once there. However, the influence of weather or climate variables on organochlorine accumulation in Arctic wildlife, including seabirds, and associated time scale are poorly understood. We assessed the interannual relationships between a suite of weather/climate variables for time lags of 0 to 10 yr and organochlorine pollutant concentrations spanning 1975–2014 in eggs of two seabird species (...
#1Birgit M. Braune (Carleton University)H-Index: 34
#2Anthony J. Gaston (Carleton University)H-Index: 43
Last.Mark L. Mallory (Acadia University)H-Index: 3
view all 3 authors...
Abstract We compared temporal trends of legacy organochlorine pesticides and PCBs in eggs of five seabird species breeding at Prince Leopold Island in the Canadian high Arctic. Concentrations of most of the major organochlorine groups/compounds have either declined (e.g. Σ 35 PCB, ΣDDT, ΣCBz, ΣCHL, octachlorostyrene) or shown no consistent directional change (e.g. heptachlor epoxide) since 1975 in eggs of thick-billed murres ( Uria lomvia ), northern fulmars ( Fulmarus glacialis ) and black-legg...
#1Birgit M. Braune (Carleton University)H-Index: 34
#2Shoshanah Jacobs (U of G: University of Guelph)H-Index: 6
Last.Anthony J. Gaston (Carleton University)H-Index: 43
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Abstract Contaminant concentrations may vary among sequentially-laid eggs in multi-egg clutches, and this variation has implications for the interpretation of contaminant concentrations in monitoring programs. The thick-billed murre ( Uria lomvia ) is a key species for monitoring contaminants in the Canadian Arctic and lays only a single egg per year. Therefore, the potential issue of intra-clutch variation in contaminant concentrations is avoided. However, if the egg is removed or lost early in...
#1Anthony J. GastonH-Index: 43
#2Marc-Andre CyrH-Index: 1
Last.Kieran O'DononvanH-Index: 1
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Bylot Island, part of Sirmilik National Park, supports two major breeding colonies of intermingled Thick-billed Murres ( Uria lomvia ) and Black-legged Kittiwakes ( Rissa tridactyla ): at Cape Hay near the northwest tip and at Cape Graham Moore at the opposite end of the island. Although the size of these colonies has been estimated previously, there is no information on how the estimates were made, except for Thick-billed Murres at Cape Hay in 1977, when the numbers were based on sampling only ...
#1Kyle H. Elliott (McGill University)H-Index: 8
Last.Flemming Merkel (AU: Aarhus University)H-Index: 16
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AbstractThe duration of parental care in animals varies widely, from none to lifelong. Such variation is typically thought to represent a trade-off between growth and safety. Seabirds show wide variation in the age at which offspring leave the nest, making them ideal to test the idea that a trade-off between high energy gain at sea and high safety at the nest drives variation in departure age (Ydenberg’s model). To directly test the model assumptions, we attached time-depth recorders to murre pa...
#1Joshua T. Cunningham (U of G: University of Guelph)H-Index: 1
#2Maryline Le Vaillant (CNRS: Centre national de la recherche scientifique)H-Index: 9
Last.Kyle H. Elliott (McGill University)H-Index: 8
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Several biological functions, such as reproductive success, peak during middle age in long-lived vertebrates. One possible mechanism for that peak is improved foraging performance during middle age, after a period of youthful inexperience and before senescence. Age may be particularly important in relating foraging behaviour to fitness for diving animals as altered skeletal muscle contraction efficiency or cardiovascular function could play a strong role at the scale of a single dive. Miniaturiz...
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