To Winter East or West? Heterogeneity in Winter Philopatry in a Central-Arctic Population of King Eiders

Mehl, Katherine R.; Alisauskas, Ray T.; Hobson, Keith A.; Kellett, Dana K.

doi:10.1650/7356

Cited by 35 publications

(14 citation statements)

References 34 publications

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“…To date, no long-tailed ducks marked on wintering areas on the Atlantic coast or Great Lakes have bred west of the Kent Peninsula, Nunavut, Canada (Mallory et al 2006;Sea Duck Joint Venture 2015a). Based on these results, and similar to king and common eiders (Mehl et al 2004;Dickson 2012a, b), the boundary between breeding areas for Pacific and Atlantic populations of long-tailed ducks is likely well east of the Beaufort Sea somewhere in central Arctic Canada.…”

Section: Discussionsupporting

confidence: 63%

Migration characteristics of long-tailed ducks (Clangula hyemalis) from the western Canadian Arctic

Bartzen¹,

Dickson²,

Bowman

2016

Polar Biol

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Section: Discussionsupporting

confidence: 63%

Migration characteristics of long-tailed ducks (Clangula hyemalis) from the western Canadian Arctic

Bartzen¹,

Dickson²,

Bowman

2016

Polar Biol

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“…Our results are broadly applicable to these species, however, because birds from these two breeding populations originate from wintering areas representative of the species' entire range in North America. Eiders from Karrak Lake (Canada) are known to winter from the Pacific to the Atlantic [24], and scoters from Redberry Lake (Canada) show a similar eastwest distribution, albeit at lower latitudes [25]. We caution readers to view estimates of survival from the present study only in the context of the effect of blood trace metals on survival.…”

Section: Discussionmentioning

confidence: 83%

Survival rates and blood metal concentrations in two species of free‐ranging North American sea ducks

Wayland

Drake

Alisauskas

et al. 2008

Enviro Toxic and Chemistry

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Abstract-Populations of several species of North American sea ducks have declined in the past few decades. Exposure to environmental contaminants, particularly metals, has been proposed as one of many possible factors contributing to these declines. Population dynamics are influenced by survival rates and breeding effort. In the present study, we examined the relationships between blood metal concentrations (Cd, Pb, Se, and Hg) and apparent annual survival and recapture probabilities (the latter as a surrogate for breeding effort) in adult females of two sea duck species, the king eider (Somateria spectabilis) and the white-winged scoter (Melanitta fusca), both of which have experienced declines in continental population during in recent years. No support was found for the hypothesis that exposure of white-winged scoters to these metals or of king eiders to Cd, Se, and Pb adversely affected probabilities of apparent annual survival. We detected a weak negative relationship ( ϭ Ϫ0.833) between Hg and annual survival ␤ of king eiders, but the 90% confidence interval of the slope estimate overlapped zero (Ϫ2.439 to ϩ0.672). Recapture probabilities were unrelated to concentrations of Cd, Se, and Pb in either species. Evidence indicated that Hg concentrations affected recapture probability in white-winged scoters ( ϭ Ϫ194.77; 90% confidence interval, Ϫ203.770 to Ϫ185.778). Mercury levels were low ␤ in both species, and blood samples may not adequately represent long-term exposure to Hg. Therefore, conclusions regarding Hg effects on these birds should be considered with caution.

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“…resident or local vs. distant) be generally classified isotopically, so that a good estimate of isotopic variance associated with these populations can be established. Then, statistical inference based on tests such as discriminant function analyses (Alisauskas and Hobson 1992;Mehl et al 2004) can provide probability of assignment of individuals (see also Royle and Rubenstein in press;Hebert and Wassenaar 2004). Overall, the utility of using deuterium assays of birds in Europe based on the GSD δD p pattern is not quite as encouraging for North America, which has so far shown much less variance associated with the δD f /δD p relation (e.g., Hobson and Wassenaar 1997;Kelly et al 2001;but see Chamberlain et al 1997;.…”

Section: Applications To Wildlife Studies In Europementioning

confidence: 99%

Using stable hydrogen and oxygen isotope measurements of feathers to infer geographical origins of migrating European birds

Hobson¹,

Bowen

Wassenaar³

et al. 2004

Oecologia

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191

190

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Successful application of stable-hydrogen isotope measurements (deltaDf) of feathers to track origins of migratory birds and other wildlife requires a fundamental understanding of the correlation between deltaDf and deuterium patterns in rainfall (deltaDp) over continental scales. A strong correlation between deltaDp and deltaDf has been confirmed for birds and insects in North America, but not yet for other continents. Here, we compare deltaDf data from resident European birds to new deltaDp basemaps for Europe. Three maps, representing growing-season and mean annual deltaDp estimates from an elevation-explicit, detrended interpolation model and growing-season deltaDp estimates from simple Kriging, all indicate that strong isotope gradients occur across Europe with a general depletion occurring in a northeast direction. The feather data, representing 141 individuals of 25 avian species from 38 sites, ranged from -131 to -38 per thousand. Regression analysis showed that strong correlations existed between both mean annual and growing-season deltaDp estimated by detrended interpolation and deltaDf of non-aquatic and non-corvid birds (r2=0.66 and 0.65, respectively). We also examined mean annual and growing-season delta18Op vs. delta18Of for our samples. Both oxygen regressions were similar (r2=0.56 and 0.57, respectively) but poorer than for deuterium. Our study reveals that deltaD measurements of feathers from migratory birds in Europe may be used to track their origin and movements, and so provide a powerful investigative tool for avian migration research in Europe.

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To Winter East or West? Heterogeneity in Winter Philopatry in a Central-Arctic Population of King Eiders

Cited by 35 publications

References 34 publications

Migration characteristics of long-tailed ducks (Clangula hyemalis) from the western Canadian Arctic

Migration characteristics of long-tailed ducks (Clangula hyemalis) from the western Canadian Arctic

Survival rates and blood metal concentrations in two species of free‐ranging North American sea ducks

Using stable hydrogen and oxygen isotope measurements of feathers to infer geographical origins of migrating European birds

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