Tropical Ecology and Conservation [Monteverde Institute]


Amber Carr



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Publication Date

June 2006


The Resplendent Quetzal (Trogonidae) lives in the cloud forests of Central America. In Costa Rica, nest boxes have been placed in the Monteverde Cloud Forest Preserve to increase the population sizes of these birds, which are listed as near threatened by C.I.T.E.S. Cameras placed inside the boxes from 2000 to 2003 as web cams and captured stills inside the nests. I used these four years of captured images and made external observations of two nests to study if there were differences in parental investment for incubation and rearing. I found evidence that 1. During incubation the female spent more total time in the nest than the male (Nest 2 tied p-value =0.0001). 2. The male had significantly more visits per day during incubation than the female (Nest 3 tied p-value =0.0360 and Nest 4 tied p-value =0.0391). 3. The female had significantly more visits per day during rearing than the male (Nest 1 tied p-value =0.0209). 4. The female and male had significantly more total time in the nest for incubation than rearing (Nest 1 female tied pvalue = < 0.0001 male tied p-value =0.001 and Nest 8 female tied p-value =0.02853 and male tied p-value = <0.001) and the mean visits were significantly higher for incubation than rearing for both males and females (Nest 1 female tied p-value =<0.0001 and male tied p-value = < 0.0001, Nest 6 female tied p-value = 0.0315, and Nest 8 female tied p-value = 0.0285 and male tied p-value = < 0.0001). 5. The female had a significantly higher number of visits to the nest during rearing than incubation (Nest 1 tied p-value =0.0097 and Nest 6 tied p-value =0.0031). These results suggest that the female invests more in the young than the male. The female might be willing to invest more in her young due to the fact that she initially invests more in her egg than the male does in his sperm. The study of the nesting behavior of these birds is important to their conservation. Fledging success of their young will be what determines whether their populations will be threatened by extinction. El Quetzal (Trogonidae) vive en los bosques nubosos de América Central. En Costa Rica se han instalado cajas para nidos en la Reserva Biológica del Bosque Nuboso de Monteverde para aumentar las poblaciones de estas aves que están clasificadas como amenazadas en C.I.T.E.S. Se instalaron cámaras dentro de las cajas del año 2000 al 2003 y se tomaron fotos del interior de los nidos. Yo usé estos cuatro años de fotos y observé dos nidos para determinar si había alguna diferencia en la inversión paternal en la incubación y cría de los polluelos. Se encontró evidencia de que: 1. La hembra paso más tiempo en el nido que el macho durante la incubación (p del Nido 2 =0.0001); 2. El macho tuvo más visitas por día que la hembra durante la incubación (p del Nido 3 =0.0360 y p del Nido 4 =0.0391); 3. La hembra tuvo más visitas por día que el macho durante el período de crianza (p del Nido 1 =0.0209); 4. La hembra y el macho tuvieron más tiempo total dentro del nido durante la incubación que durante la crianza (p del Nido 1 para la hembra =<0.0001, p del Nido 1 para el macho =0.001 y p del Nido 8 para la hembra =0.02853 y para el macho=<0.001) y las visitas promedio fueron significativamente más altas durante la incubación que durante la crianza tanto para los machos como para las hembras (p del Nido 1 para la hembra = < 0.0001 y para el macho = < 0.0001, p del Nido 6 para la hembra =0.0315, y Nido 8 para la hembra =0.0285 y para el macho = < 0.0001). 5. La hembra presentó un número mayor de visitas al nido durante la crianza (p del Nido 1=0.0097 y p del Nido 6 = 0.0031). Estos resultados sugieren que la hembra invierte más tiempo que el macho en los polluelos. Es posible que la hembra invierta más tiempo en sus polluelos porque ha invertido más en sus huevos que lo que el macho ha invertido en su esperma. El estudio del comportamiento de anidación de los quetzales es importante para su conservación. La sobrevivencia de los polluelos será lo que determine si sus poblaciones serán amenazadas por la extinción.


Student affiliation : Department of Ecology and Environmental Sciences, University of Maine Born Digital



Holding Location

Monteverde Institute IMVI



Nesting behavior in the resplendent quetzal (Pharomachrus mocinno: Trogonidae)



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