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Survival of Female White-cheeked Pintails During Brood Rearing in Puerto Rico

Marisel Lopez-Flores1,2, J. Brian Davis1,*, Francisco J. Vilella3, Richard M. Kaminski1,José A. Cruz-Burgos1,4, and Joseph D. Lancaster1

1Department of Wildlife, Fisheries and Aquaculture, Box 9690, Mississippi State, Mississippi, MS 39762, USA. 2Current address - US Fish and Wildlife Service, Puerto Rican Parrot Recovery Program Sub-Office, Box 1600, Río Grande, Puerto Rico 00745, USA. 3US Geological Survey, Mississippi Cooperative Fish and Wildlife Research Unit, Department of Wildlife, Fisheries and Aquaculture, Box 9691, Mississippi State, Mississippi, MS 39762, USA. 4Current address - US Fish and Wildlife Service, Caribbean Ecological Services Field Office, PO Box 491, Boquerón, Puerto Rico 00622, USA. *Corresponding author.

Caribbean Naturalist, No. 10 (2014)

Abstract
Anas bahamensis (White-cheeked Pintail) is widely distributed across the Caribbean islands and South America. The species is classified as threatened in Puerto Rico and a species of least concern across most of its range. Little demographic data exist for the species, particularly during the breeding season. During 2000–2002, we radiomarked 31 incubating females at the Humacao Nature Reserve (Humacao) in southeastern Puerto Rico and estimated daily and interval survival rates of females during brood rearing. Only one of 31 birds died; the average ± 95% CI daily survival rate of pintails was 0.998 ± 0.989–0.999 for all years, and interval survival was 0.913 ± 0.527–0.987 for a 60-day brood-rearing period. High survival of females suggests their mortality during brood rearing does not influence White-cheeked Pintail populations at Humacao, but further studies of reproductive and annual ecology are needed.

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