Post-Fledging Habitat Selection by the Slender-Billed Parakeet (Enicognathus Leptorhynchus) in a Fragmented Agricultural Landscape of Southern Chile

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This article contains an examination of habitat selection by radio-tracked juvenile Slender-billed Parakeets (Enicognathus leptorhynchus) at multiple spatial scales in a fragmented agricultural landscape of southern Chile.

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7 p.

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Carneiro, Ana Paula B.; Jiménez, Jaime E. & White, Thomas H., Jr. June 22, 2011.

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This article contains an examination of habitat selection by radio-tracked juvenile Slender-billed Parakeets (Enicognathus leptorhynchus) at multiple spatial scales in a fragmented agricultural landscape of southern Chile.

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7 p.

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Abstract: Despite the importance of the post-fledging period in avian population dynamics, little is known about habitat use during this life stage. We examined habitat selection by radio-tracked juvenile Slender-billed Parakeets (Enicognathus leptorhynchus) at multiple spatial scales in a fragmented agricultural landscape of southern Chile. Using home ranges versus study area (home-range selection) and locations versus combined home range (habitat-type selection), we based spatial analyses of habitat selection on the population level. Slender-billed Parakeets made similar habitat choices across the hierarchical levels examined, except for riparian and native second-growth forests, which they avoided at the level of overall home-range selection but used in proportion to availability at the level of habitat-type selection. Farmland and pastures with high densities of scattered mature trees were the only habitats positively selected at multiple spatial scales, adding to the increasing amount of literature highlighting the value of such trees for native fauna in highly modified areas. These trees appeared to be important for the birds during the post-fledging period as sites for feeding, perching, and roosting and to facilitate movement through open agricultural landscapes.

Resumen:A pesar de la importancia del periodo posterior al abandono de los nidos en la dinámica poblacional de las aves, poco se sabe sobre el uso de hábitats durante esta etapa. El propósito de este estudio fue examinar la selección de hábitats por juveniles de Enicognathus leptorhynchus, mediante radio-telemetría, a múltiples escalas espaciales en un paisaje agrícola fragmentado en el sur de Chile. Los análisis espaciales de selección se basaron en el ámbito de hogar versus el área de estudio (selección del ámbito de hogar) y en las localizaciones versus los ámbitos de hogar combinados (selectión del hábitat) a nivel poblacional. La selección de hábitats por E. leptorhynchus fue similar para los distintos niveles jerárquicos propuestos en el presente estudio, excepto por las áreas ribereñas y los bosques nativos secundarios que fueron evitados cuando los ámbitos de hogar fueron comparados con el área de estudio, y fueron utilizadas de acuerdo a su disponibilidad cuando las localizaciones se compararon con los ámbitos de hogar combinados. Las matrices agrìcolas que tenían mayores densidades de árboles aislados fueron los únicos hábitats seleccionados positivamente en múltiples escalas espaciales, concordando con la creciente literatura que destaca la importancia de estos elementos para la fauna nativa en ambientes altamente modificados. Estos árboles parecen ser importantes para el período posterior al abandono de los nidos, ya que son usados como fuentes de alimentatión, sitios para descansar y dormideros, y para facilitar el desplazamiento a través del paisaje.

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  • The Condor: Ornithological Applications, 2012. Chicago, IL: The American Ornithological Society.

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  • Publication Title: The Condor: Ornithological Applications
  • Volume: 114
  • Pages: 166-172
  • Peer Reviewed: Yes

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  • July 5, 2010

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  • June 22, 2011

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  • June 22, 2011

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  • Aug. 29, 2017, 9:38 a.m.

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Carneiro, Ana Paula B.; Jiménez, Jaime E. & White, Thomas H., Jr. Post-Fledging Habitat Selection by the Slender-Billed Parakeet (Enicognathus Leptorhynchus) in a Fragmented Agricultural Landscape of Southern Chile, article, June 22, 2011; Chicago, Illinois. (digital.library.unt.edu/ark:/67531/metadc990945/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.