Abstract
Mass-banding of geese may disrupt family groups, at least temporarily, and could potentially affect survival of goslings. Thus, we assessed the importance of changes in gosling body condition to prefledging gosling mortality and family group structure following mass-banding in the lesser snow goose (Chen caerulescens caerulescens), at La Perouse Bay, Manitoba, 1984-91. Mean observed brood size decreased (P < 0.01) in all years following banding for all observed broods (by 29-94%) and for resighted individuallymarked broods (by 33%). Banded broods also were smaller (P < 0.001) than non-banded broods after banding drives in two of 4 years (by 23-28%). Brood-mixing and adoption, following banding, were not common (occurring in a minimum of 2% of broods)
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