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Observation of intraspecific nest usurpation of the Yellow-shouldered Blackbird (<em>Agelaius xanthomus</em>) in southwestern Puerto Rico
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Abstract Identifying behaviors that can be detrimental to the reproduction of an endangered species should be of high priority for any conservation effort. This could lead to the development and implementation of new conservation strategies that may significantly increase the breeding success of these species. We document the first report of intraspecific nest usurpation for the Yellow-shouldered Blackbird (Agelaius xanthomus) in southwestern Puerto Rico. On 16 September 2020, an adult violently removed a 14–16-day-old nestling from an Artificial Nesting Structure in the Pitahaya mangrove forest.
Keywords Agelaius xanthomus, infanticide, intraspecific competition, nest usurpation, nesting behavior, Puerto Rico
Resumen Observación de un evento de usurpación intraespecífica de nido de Agelaius xanthomus en el suroeste de Puerto Rico • La identificación de conductas que pueden ser perjudiciales para la reproducción de especies en peligro de extinción debe ser una prioridad absoluta en cualquier esfuerzo de conservación. Esto podría resultar en el desarrollo e implementación de nuevas estrategias que podrían aumentar significativamente el éxito reproductivo de estas especies. Documentamos el primer registro de usurpación intraespecífica de nido para Agelaius xanthomus en la región suroeste de Puerto Rico. El 16 de septiembre de 2020, un adulto expulsó violentamente un pichón de 14 a 16 días de nacido de una estructura de nidificación artificial en el manglar de Pitahaya.
Palabras clave Agelaius xanthomus, competencia intraespecífica, comportamiento de nidificación, infanticidio, Puerto Rico, usurpación de nido
Résumé Observation de l’usurpation intraspécifique d’un nid par le Carouge de Porto Rico (Agelaius xanthomus) dans le sud-ouest de Porto Rico • L’identification des comportements pouvant nuire à la reproduction d’une espèce menacée doit être une priorité absolue pour tout effort de conservation. Cela pourrait conduire à l’élaboration et à la mise en œuvre de nouvelles stratégies de conservation susceptibles d’accroître considérablement le succès de reproduction de ces espèces. Nous documentons la première observation d’usurpation intraspécifique d’un nid par le Carouge de Porto Rico (Agelaius xanthomus) dans le sud-ouest de Porto Rico. Le 16 septembre 2020, un adulte a violemment expulsé un oisillon âgé de 14 à 16 jours d’une structure de nidification artificielle dans la mangrove de Pitahaya.
Mots clés Agelaius xanthomus, compétition intraspécifique, comportement de nidification, infanticide, Porto Rico, usurpation de nid
Title: Observation of intraspecific nest usurpation of the Yellow-shouldered Blackbird (<em>Agelaius xanthomus</em>) in southwestern Puerto Rico
Description:
Abstract Identifying behaviors that can be detrimental to the reproduction of an endangered species should be of high priority for any conservation effort.
This could lead to the development and implementation of new conservation strategies that may significantly increase the breeding success of these species.
We document the first report of intraspecific nest usurpation for the Yellow-shouldered Blackbird (Agelaius xanthomus) in southwestern Puerto Rico.
On 16 September 2020, an adult violently removed a 14–16-day-old nestling from an Artificial Nesting Structure in the Pitahaya mangrove forest.
Keywords Agelaius xanthomus, infanticide, intraspecific competition, nest usurpation, nesting behavior, Puerto Rico
Resumen Observación de un evento de usurpación intraespecífica de nido de Agelaius xanthomus en el suroeste de Puerto Rico • La identificación de conductas que pueden ser perjudiciales para la reproducción de especies en peligro de extinción debe ser una prioridad absoluta en cualquier esfuerzo de conservación.
Esto podría resultar en el desarrollo e implementación de nuevas estrategias que podrían aumentar significativamente el éxito reproductivo de estas especies.
Documentamos el primer registro de usurpación intraespecífica de nido para Agelaius xanthomus en la región suroeste de Puerto Rico.
El 16 de septiembre de 2020, un adulto expulsó violentamente un pichón de 14 a 16 días de nacido de una estructura de nidificación artificial en el manglar de Pitahaya.
Palabras clave Agelaius xanthomus, competencia intraespecífica, comportamiento de nidificación, infanticidio, Puerto Rico, usurpación de nido
Résumé Observation de l’usurpation intraspécifique d’un nid par le Carouge de Porto Rico (Agelaius xanthomus) dans le sud-ouest de Porto Rico • L’identification des comportements pouvant nuire à la reproduction d’une espèce menacée doit être une priorité absolue pour tout effort de conservation.
Cela pourrait conduire à l’élaboration et à la mise en œuvre de nouvelles stratégies de conservation susceptibles d’accroître considérablement le succès de reproduction de ces espèces.
Nous documentons la première observation d’usurpation intraspécifique d’un nid par le Carouge de Porto Rico (Agelaius xanthomus) dans le sud-ouest de Porto Rico.
Le 16 septembre 2020, un adulte a violemment expulsé un oisillon âgé de 14 à 16 jours d’une structure de nidification artificielle dans la mangrove de Pitahaya.
Mots clés Agelaius xanthomus, compétition intraspécifique, comportement de nidification, infanticide, Porto Rico, usurpation de nid.
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