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Influence of Brood Rearing on Female Mallard Survival and Effects of Harness-Type Transmitters (Evaluación del Efecto de Transmisores en Arneses en la Crianza de Patitos y en la Supervivencia de Hembras de Anas platyrhynchos)
by
W. Lee Tucker
, Bergmann, Peter J.
, Flake, Lester D.
in
Age structure
/ Anas platyrhynchos
/ Animal nesting
/ Ducklings
/ Female animals
/ Freshwater
/ Mortality
/ Predation
/ Radio transmitters
/ Survival rates
/ Transmitters
/ Waterfowl
1994
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Influence of Brood Rearing on Female Mallard Survival and Effects of Harness-Type Transmitters (Evaluación del Efecto de Transmisores en Arneses en la Crianza de Patitos y en la Supervivencia de Hembras de Anas platyrhynchos)
by
W. Lee Tucker
, Bergmann, Peter J.
, Flake, Lester D.
in
Age structure
/ Anas platyrhynchos
/ Animal nesting
/ Ducklings
/ Female animals
/ Freshwater
/ Mortality
/ Predation
/ Radio transmitters
/ Survival rates
/ Transmitters
/ Waterfowl
1994
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Influence of Brood Rearing on Female Mallard Survival and Effects of Harness-Type Transmitters (Evaluación del Efecto de Transmisores en Arneses en la Crianza de Patitos y en la Supervivencia de Hembras de Anas platyrhynchos)
by
W. Lee Tucker
, Bergmann, Peter J.
, Flake, Lester D.
in
Age structure
/ Anas platyrhynchos
/ Animal nesting
/ Ducklings
/ Female animals
/ Freshwater
/ Mortality
/ Predation
/ Radio transmitters
/ Survival rates
/ Transmitters
/ Waterfowl
1994
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Influence of Brood Rearing on Female Mallard Survival and Effects of Harness-Type Transmitters (Evaluación del Efecto de Transmisores en Arneses en la Crianza de Patitos y en la Supervivencia de Hembras de Anas platyrhynchos)
Journal Article
Influence of Brood Rearing on Female Mallard Survival and Effects of Harness-Type Transmitters (Evaluación del Efecto de Transmisores en Arneses en la Crianza de Patitos y en la Supervivencia de Hembras de Anas platyrhynchos)
1994
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Overview
A total of 62 Mallard (Anas platyrhynchos) females were captured at their nests in eastern South Dakota during 1990 and 1991. Females were captured on an island, a peninsula cut off from the mainland by excavation, and a peninsula protected by an electric fence that deters mammals. Loop harnesses were used to attach radio transmitters to females to evaluate possible effects of marking females on survival of their ducklings and to determine the influence of brood rearing on female survival. No difference was found in duckling (P = 0.999) or brood (P = 0.458) (e.g., one or more ducklings alive in brood) survival to 7 d for females marked from 1 d prior to hatch to immediately post hatch (still in nest) compared with those marked at 3-9 d before hatch (P = 0.081). There also were no differences in survival by age class between marked broods that did not suffer total mortality and unmarked broods (P > 0.05). If survival of broods was influenced by harness attachments on females, it likely occurred in females suffering total brood loss early in brood rearing. Marked females with broods had poorer survival to 21 d than marked females that had lost or abandoned their clutches or broods (73.5% vs. 100%, P < 0.001). /// Durante el 1990 y 1991 se capturaron, en sus nidos, un total de 62 individuos de Anas platyrhynchos en un estudio que se llevó a cabo en Dakota del Sur. Las hembras fueron capturadas en islas, penínsulas separadas por excavación de tierra firme y una península protegida de mamíferos depredadores por una verja electrificada. Se utilizaron arneses en forma de lazo para montar los radiotransmisores a hembras y evaluar el posible efecto de los artefactos en la supervivencia de los patitos y la influencia de la crianza en la supervivencia de la hembra. No se encontraron diferencias significativas en la supervivencia de patitos (P = 0.999) o camadas (P = 0.458) (ej. uno o más patitos vivos en cada camada) hasta los siete días de edad para hembras marcadas el día previo al eclosionamiento o un día inmediatamente después (todavía en el nido) esto en comparación a hembras a las cuales se les colocó el radiotransmisor 3-9 días previo al eclosionamiento (P = 0.081). Tampoco se encontró diferencia en la supervivencia de patitos (arreglados en grupos por edades) entre camadas que no sufrieron mortalidad total y camadas no marcadas (P > 0.05). Si acaso hubo influencia de los radiotransmisores en la supervivencia de las camadas, ésta ocurrió en hembras que perdieron toda la camada poco tiempo después del eclosionamiento. Las hembras con camadas, que fueron marcadas, tuvieron una supervivencia menor (hasta los 21 días), que aquellas (también con radiotransmisores) que perdieron o abandonaron sus nidos o sus patitos a bien temprana edad (73.5% vs. 100%, P < 0.001).
Publisher
Association of Field Ornithologists, Inc
Subject
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