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Life sciences
2
envir
2
medicine and health care
socio
Aerial survey
1
Anas acuta
1
Animal demography
1
Anser albifrons
1
Branta hutchinsii
1
Clangula hyemalis
1
Cygnus columbianus
1
Cygnus columbianus bewickii
1
Density dependence
1
Fitness
1
Gavia spp
1
Grus canadensis
1
Lagopus spp
1
Northwest Europe
1
Russian Arctic
1
Somateria spectabilis
1
detection probability
1
distance-sampling
1
mark-recapture
1
population estimation
1
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