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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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Cambios de trayectoria impulsados por el clima y migración de larga distancia basada en la memoria

Zhongru Gu1,2,3, Shengkai Pan1,2, Zhenzhen Lin1,2

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Resumen
Este resumen es generado por máquina.

Los investigadores rastrearon 56 halcones peregrinos a través de Eurasia, revelando cinco rutas de migración distintas. El gen ADCY8 está vinculado a la distancia migratoria, con la memoria a largo plazo potencialmente impulsando su evolución en estas aves del Ártico.

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Área de la Ciencia:

  • Ecología aviar
  • La genética evolutiva
  • Biología de la conservación

Sus antecedentes:

  • Las zonas de cría del Ártico acogen anualmente a millones de aves migratorias.
  • Comprender las rutas de migración de las aves y su base genética es crucial, especialmente para las poblaciones árticas.
  • La formación, el mantenimiento y el futuro de estas rutas bajo el cambio ambiental siguen siendo poco conocidos.

Objetivo del estudio:

  • Investigar la formación y el mantenimiento de las rutas migratorias de los halcones peregrinos del Ártico euroasiático (Falco peregrinus).
  • Identificar los determinantes genéticos de la distancia migratoria en estas poblaciones.
  • Evaluar el impacto potencial del cambio climático en la migración del halcón peregrino del Ártico.

Principales métodos:

  • Seguimiento por satélite de 56 halcones peregrinos de 6 poblaciones árticas de Eurasia.
  • Secuenciación completa del genoma de 35 individuos de 4 poblaciones.
  • Análisis de las divergencias ambientales y las asociaciones genéticas.

Principales resultados:

  • Se identificaron cinco rutas de migración distintas en toda Eurasia, probablemente formadas por cambios climáticos pasados (del último máximo glacial al Holoceno).
  • Las diferencias ambientales contemporáneas parecen mantener la distinción de la ruta.
  • El gen ADCY8 se asoció significativamente con las diferencias a nivel de población en la distancia migratoria, con evidencia que sugiere la memoria a largo plazo como un agente selectivo.

Conclusiones:

  • Las rutas de migración están moldeadas por los cambios climáticos históricos y mantenidas por la divergencia ambiental actual.
  • La variación genética en ADCY8 influye en la distancia migratoria, potencialmente vinculada a rasgos cognitivos como la memoria a largo plazo.
  • El cambio climático representa una amenaza para las zonas de reproducción y las estrategias de migración del halcón peregrino ártico, lo que requiere esfuerzos de conservación basados en procesos ecológicos y evolutivos.