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1 November 2000 INFLUENCE OF FEMALE AGE AND BODY MASS ON BROOD AND DUCKLING SURVIVAL, NUMBER OF SURVIVING DUCKLINGS, AND BROOD MOVEMENTS IN REDHEADS
Tina Yerkes
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Abstract

I documented brood and duckling survival, the number of surviving ducklings, and brood movements of Redheads, and examined the association between these variables and female age and body mass. Redhead brood success was 55% and duckling daily survival rates averaged 0.868. Female body mass, but not age, was related to brood and duckling survival and the number of surviving ducklings. Successful females were heavier and produced more ducklings. All brood-movement measures differed between successful and unsuccessful females, however, the distance of the first move between wetlands accounted for the most variability in brood success. Increased body mass, but not age, was associated with longer first brood movements.

Tina Yerkes "INFLUENCE OF FEMALE AGE AND BODY MASS ON BROOD AND DUCKLING SURVIVAL, NUMBER OF SURVIVING DUCKLINGS, AND BROOD MOVEMENTS IN REDHEADS," The Condor 102(4), 926-929, (1 November 2000). https://doi.org/10.1650/0010-5422(2000)102[0926:IOFAAB]2.0.CO;2
Received: 22 July 1999; Accepted: 1 April 2000; Published: 1 November 2000
KEYWORDS
Aythya americana
body mass
brood movements
brood survival
duckling survival
female age
Redhead
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