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Seguimiento de la migración de aves cantoras de larga distancia mediante el uso de geolocalizadores.

Bridget J M Stutchbury¹, Scott A Tarof, Tyler Done

¹Department of Biology, York University, Toronto, Ontario M3J 1P3, Canada. bstutch@yorku.ca

Science (New York, N.Y.)

|February 14, 2009

Resumen

Se rastrearon aves cantoras migratorias como los martines púrpuras y los zorros de madera utilizando geolocalizadores para mapear sus rutas neotrópicas. Los hallazgos revelan lugares de cría e invierno conectados, cruciales para la conservación en medio de cambios en el hábitat.

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Área de la Ciencia:

Ornitología Ornitología.
Ecología Ecología Ecología.
Biología de la Conservación Biología de la Conservación.

Sus antecedentes:

Las aves cantoras migratorias emprenden viajes de larga distancia entre las zonas de cría y de invierno.
Comprender las rutas de migración es vital para las estrategias efectivas de conservación.
Las aves migratorias neotrópicas se enfrentan a amenazas por la pérdida de hábitat y el cambio climático.

Objetivo del estudio:

Trazar un mapa de las rutas de migración de los martines púrpuras (Progne subis) y los zorros de madera (Hylocichla mustelina) hacia los Neotrópicos.
Evaluar la conectividad entre las poblaciones reproductoras e invernadoras de estas especies.
Para determinar el ritmo y los patrones de la migración de primavera.

Principales métodos:

Implementación de geolocalizadores a nivel de luz en individuos reproductores de martines púrpuras y zorras de madera.
Análisis de datos de geolocalización para reconstruir rutas de migración y cronometraje.
Cartografía geográfica de los territorios ocupados en invierno.

Principales resultados:

Las rutas de migración hacia los Neotrópicos fueron mapeadas con éxito para ambas especies.
Los zorros de madera de la misma población reproductora exhibieron territorios de invierno en una estrecha banda este-oeste en América Central, lo que indica una alta conectividad de la población.
El ritmo de migración de primavera fue generalmente rápido (233-577 km/día), con un individuo migrando más lento por tierra (159 km/día) en lugar de cruzar el Golfo de México.

Conclusiones:

El estudio destaca la conectividad significativa entre las zonas de cría y de invierno de las aves migratorias cantoras.
La cartografía precisa de las rutas de migración y las zonas de invierno es esencial para predecir los impactos de los cambios ambientales.
Los esfuerzos de conservación en las regiones neotropicales son críticos para la supervivencia de estas poblaciones migratorias.