Patterns of variation in survival rates of lesser snow geese / Charles Mackenzie Francis.
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TextSeries: Thesis ; (Ph.D.)Publication details: Kingston, ON : Queen's University, 1990.Description: vii, 69 leaves : maps ; 28 cmOnline resources: Abstract: I estimated variation in survival rates of lesser snow geese (Anser caerulescens caerulescens) in relation to age, breeding status, sex,time, and migration route, using hunter recoveries and recaptures from 350,000 geese banded on breeding grounds, migration stop-overs, and wintering grounds. Survival rates of goslings were usually much lower than those of adults, but varied among years and breeding colonies.Gosling mortality appeared to occur mainly on the breeding grounds or the first stage of autumn migration; after reaching stop-over sites,young geese were more vulnerable to hunters, but survival rates were only slightly lower than those of adults. Yearling geese remained significantly more vulnerable to hunters and had lower survival rates than adults. In contrast, older non-breeding geese were significantly less vulnerable to hunters than breeding adults, although their survival rates did not appear to be higher. Breeding adults caught for the first time averaged slightly low
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Thesis(Ph.D.)--Queen's University, 1990.
"November 1990."
Includes bibliographical references (leaves 65-69).
I estimated variation in survival rates of lesser snow geese (Anser caerulescens caerulescens) in relation to age, breeding status, sex,time, and migration route, using hunter recoveries and recaptures from 350,000 geese banded on breeding grounds, migration stop-overs, and wintering grounds. Survival rates of goslings were usually much lower than those of adults, but varied among years and breeding colonies.Gosling mortality appeared to occur mainly on the breeding grounds or the first stage of autumn migration; after reaching stop-over sites,young geese were more vulnerable to hunters, but survival rates were only slightly lower than those of adults. Yearling geese remained significantly more vulnerable to hunters and had lower survival rates than adults. In contrast, older non-breeding geese were significantly less vulnerable to hunters than breeding adults, although their survival rates did not appear to be higher. Breeding adults caught for the first time averaged slightly low