
handle: 11336/33318
El Loro Hablador (Amazona aestiva) se encuentra bajo una intense presión producto de la destrucción de su hábitat y la remoción de adultos y pichones para el comercio de mascotas. Mientras que estimaciones de éxito reproductivo y supervivencia de pichones han sido producidas en estudios previos, la supervivencia de los volantones es desconocida. Entre enero y abril de 2007, equipamos con radio-collares y monitoreamos 18 volantones correspondientes a ocho nidos de Loro Hablador. Monitoreamos las aves con transmisores por un promedio de 33 ± 20.9 (SD) días (rango: 11–87) desde que abandonaron exitosamente el nido hasta que murieron, desaparecieron del área de estudio o falló el transmisor. La supervivencia durante este período fue 94% (n = 18) y la única muerte, que ocurrió 11 días posteriores al abandono del nido, fue causada por un ave rapaz. Durante febrero, perdimos la señal de 15 de los 17 volantones supervivientes a un promedio de 27.3 ± 7.3 (SD) días (rango: 16–37) posteriores al abandono del nido. Perdimos las señales de los hermanos al mismo tiempo, indicando una dispersión de los grupos familiares desde el área de estudio. Las señales perdidas no pudieron ser relocalizadas durante el resto del período de estudio. Estudios adicionales se necesitan para definir la supervivencia de los juveniles sobre un periodo de tiempo mayor, asi como elucidar la dirección y distancia de viaje de las aves que abandonan el área natal después de la temporada reproductiva.
Blue-fronted Parrots (Amazona aestiva) are under intense pressure from habitat destruction and removal of adults and chicks for the pet trade. While estimates of nesting success and nestling survival of Blue-fronted Parrots have been produced in previous studies, the survival of fledglings is unknown. During January–April 2007, we monitored 18 radio-collared Blue-fronted Parrots from eight wild nests. We monitored radio-collared birds for an average of 33 ± 20.9 (SD) days (range: 11–87) postfledging, until death, disappearance from the study area, or failure of the collar. Survival during this period was 94% (n = 18) and the single mortality, which occurred 11 days post-fledging, was due to predation by a raptor. During February, we lost the signals for 15 of 17 surviving fledglings at an average of 27.3 ± 7.3 (SD) days (range: 16-37) post-fledging. We lost the signals for siblings concurrently, indicating a dispersal of family groups from the study area. The lost signals could not be relocated during the remainder of the study period. Additional studies are needed to define the survival of juveniles over a longer period as well as to elucidate the direction and distance of travel for birds that leave the natal area after the breeding season.
Fil: Berkunsky, Igor. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto Multidisciplinario de Ecosistemas y Desarrollo Sustentable; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Faegre, Sarah. University of Washington; Estados Unidos
Chaco, Parrots, Blue-fronted parrot, https://purl.org/becyt/ford/1.6, Movements, https://purl.org/becyt/ford/1
Chaco, Parrots, Blue-fronted parrot, https://purl.org/becyt/ford/1.6, Movements, https://purl.org/becyt/ford/1
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