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Anthony J. Gaston
Carleton University
EcologySeabirdUria lomviaArcticBiology
224Publications
47H-index
7,415Citations
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Publications 222
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Many studies of cavity-nesting birds in North America are conducted in large continental forests and much less is known about them in island ecosystems. We describe a 29-year study of tree species, nest site characteristics, and fledge dates of cavity-nesting birds on a small island in Haida Gwaii, British Columbia (BC). Seven cavity-nesting bird species were documented on East Limestone Island and 463 nests were found in 173 different trees. Nest trees were significantly taller and had a greate...
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#1Anthony J. GastonH-Index: 47
#2S. B. C. DechesneH-Index: 1
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#1Anthony J. GastonH-Index: 47
#2Akiko ShojiH-Index: 10
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#1Anthony J. GastonH-Index: 47
#2J. Mark HipfnerH-Index: 22
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We describe observations of Humpback Whales ( Megaptera novaeangliae ) made along the west side of central Hecate Strait, British Columbia, during the spring and summer of 1990–2018. From none in March, the frequency of sightings increased from early April to a peak in May, then fell in June with few in July. The frequency of sightings during the peak period (1 May–20 June) increased over the course of the study at a mean rate of 6% a year, similar to increases recorded elsewhere in British Colu...
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#1Karen L. Foster (Trent University)H-Index: 10
#2Birgit M. Braune (Carleton University)H-Index: 34
Last. Mark L. Mallory (Acadia University)H-Index: 19
view all 4 authors...
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...
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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...
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#1Mark L. Mallory (Acadia University)H-Index: 3
#2Anthony J. Gaston (Carleton University)H-Index: 47
Last. Nora C. Spencer (Acadia University)H-Index: 2
view all 12 authors...
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 ...
1 CitationsSource
#1Karen L. Foster (Trent University)H-Index: 10
#2Birgit M. Braune (Carleton University)H-Index: 34
Last. Mark L. Mallory (Acadia University)H-Index: 19
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 (...
2 CitationsSource
#1Birgit M. Braune (Carleton University)H-Index: 34
#2Anthony J. Gaston (Carleton University)H-Index: 47
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. Σ35PCB, 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-legged kit...
8 CitationsSource
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