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Variation in survival and recovery rates of ring-necked ducks

Journal of Wildlife Management

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Abstract

Band recovery data were used to examine sex-specific, geographic, and temporal variations in survival and recovery rates of ring-necked ducks (Aythya collaris). Survival rates were higher (P < 0.05) for males than for females in the preseason-banded sample and in 2 of 3 postseason samples; recovery rates were higher (P < 0.05) for females in 1 postseason sample. Survival rates of postseason-banded males were highest in the Mississippi Flyway, whereas rates for females were highest in the Atlantic Flyway. The hypothesis of time-constant survival rates was rejected for all 3 samples of postseason-banded males, and 1 sample of females. The relationships of time-varying survival rates to annual indices of harvest rates and population density were examined. Survival rates of adult males in 1 postseason banding area were negatively correlated with harvest rate (r = -0.78, P < 0.01) and breeding population indices (r = -0.68, P < 0.05). The results are interpreted and discussed in terms of the hypotheses of compensatory and additive mortality, and suggestions are offered for future studies into the relationship between harvest and total mortality.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Variation in survival and recovery rates of ring-necked ducks
Series title:
Journal of Wildlife Management
Volume
47
Issue:
1
Year Published:
1983
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
127-137
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
127
Last page:
137
Number of Pages:
11