Diferencias en el comportamiento de forrajeo en juveniles y adultos de espátula rosada (Platalea ajaja) en el Parque Nacional Palo Verde
Fecha
2018-06
Autores
Esquivel, Carolina
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Editor
Asociación Ornitológica (Costa Rica)
Resumen
La espátula rosada, Platalea ajaja, (Aves: Threskiornithidae) tiene una técnica de forrajeo que
consiste en introducir el pico en el agua y mover la cabeza de lado a lado, en un movimiento llamado
“barrido”. Mientras realiza el barrido remueve con las patas el suelo para espantar crustáceos, peces
pequeños y larvas de insectos (Stiles y Skutch 1989). El objetivo de este estudio fue determinar si hay
diferencias en la técnica de forrajeo entre espátulas rosadas jóvenes y adultas.
Este trabajo fue realizado en la laguna del Parque Nacional Palo Verde, Costa Rica, del 11 al 13
de febrero del 2009. Las observaciones se realizaron desde la torre de observación y otros dos puntos
frente a la laguna separados por aproximadamente 150 m. Durante tres días se hicieron observaciones
de individuos focales de 9:00 a.m. a 12:00 m.d. y de 1:00 a 5:00 p.m. En las observaciones se tomó en
cuenta si los individuos eran adultos o juveniles, considerando el color de su plumaje.
The roseate spoonbill, Platalea ajaja, (Aves: Threskiornithidae) has a foraging technique that It consists of introducing the beak into the water and moving the head from side to side, in a movement called "swept". While sweeping, it stirs the ground with its paws to scare away crustaceans, fish. small and insect larvae (Stiles and Skutch 1989). The objective of this study was to determine if there is differences in foraging technique between young and adult roseate spoonbills. This work was carried out in the lagoon of the Palo Verde National Park, Costa Rica, from 11 to 13 February 2009. The observations were made from the observation tower and two other points in front of the lagoon separated by approximately 150 m. Observations were made for three days of focal individuals from 9:00 a.m. to 12:00 p.m. and from 1:00 to 5:00 p.m. In the observations it was taken into account It counts whether the individuals were adults or juveniles, considering the color of their plumage.
The roseate spoonbill, Platalea ajaja, (Aves: Threskiornithidae) has a foraging technique that It consists of introducing the beak into the water and moving the head from side to side, in a movement called "swept". While sweeping, it stirs the ground with its paws to scare away crustaceans, fish. small and insect larvae (Stiles and Skutch 1989). The objective of this study was to determine if there is differences in foraging technique between young and adult roseate spoonbills. This work was carried out in the lagoon of the Palo Verde National Park, Costa Rica, from 11 to 13 February 2009. The observations were made from the observation tower and two other points in front of the lagoon separated by approximately 150 m. Observations were made for three days of focal individuals from 9:00 a.m. to 12:00 p.m. and from 1:00 to 5:00 p.m. In the observations it was taken into account It counts whether the individuals were adults or juveniles, considering the color of their plumage.
Descripción
Palabras clave
ESPÁTULA ROSADA, ROSE SPOTLIGHT, PLATALEA AJAJA, PARQUE NACIONAL PALO VERDE, DIFERENCIAS, COMPORTAMIENTO, FORAGING, JUVENILES, ADULTS