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Tests for senescent decline in annual survival probabilities of common pochards, Aythya ferina

Ecology

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Abstract

Senescent decline in survival probabilities of animals is a topic about which much has been written but little is known. Here, we present formal tests of senescence hypotheses, using 1373 recaptures from 8877 duckling (age 0) and 504 yearling Common Pochards (Aythya ferina) banded at a Latvian study site, 1975-1992. The tests are based on capture-recapture models that explicitly incorporate sampling probabilities that, themselves, may exhibit timeand age-specific variation. The tests provided no evidence of senescent decline in survival probabilities for this species. Power of the most useful test was low for gradual declines in annual survival probability with age, but good for steeper declines. We recommend use of this type of capture-recapture modeling and analysis for other investigations of senescence in animal survival rates.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Tests for senescent decline in annual survival probabilities of common pochards, Aythya ferina
Series title:
Ecology
Volume
78
Issue:
4
Year Published:
1997
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1009-1018
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Ecology
First page:
1009
Last page:
1018