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Las especies de aves cantoras que muestran un aprendizaje vocal más complejo resuelven mejor los problemas y tienen
Jean-Nicolas Audet1,2, Mélanie Couture1,3, Erich D Jarvis1,2,3,4
1The Rockefeller University Field Research Center, Millbrook, NY, USA.
Science (New York, N.Y.)
|September 14, 2023
Resumen
El aprendizaje vocal complejo en las aves se correlaciona con una mayor capacidad de resolución de problemas y un mayor tamaño cerebral. Esto sugiere que los mecanismos cognitivos compartidos subyacen al aprendizaje vocal y a las habilidades de resolución de problemas en las aves cantoras.
Área de la Ciencia:
- Conocimiento comparativo
- Neuroetología
- Evolución del lenguaje
Sus antecedentes:
- El aprendizaje vocal complejo es crucial para el lenguaje humano y a menudo está relacionado con la cognición avanzada.
- Los estudios previos sobre el vínculo de aprendizaje cognitivo-vocal dentro de las especies no son concluyentes.
- Faltan comparaciones entre especies del aprendizaje vocal y las habilidades cognitivas.
Objetivo del estudio:
- Investigar la relación entre las habilidades de aprendizaje vocal y las habilidades cognitivas en diferentes especies de aves.
- Para probar la hipótesis de que un mayor aprendizaje vocal está asociado con funciones cognitivas mejoradas.
- Explorar posibles mecanismos compartidos que subyacen al aprendizaje vocal, la cognición y el tamaño del cerebro.
Principales métodos:
- Se evaluaron las habilidades cognitivas (solución de problemas, aprendizaje asociativo/reversible, autocontrol) en 214 individuos de 23 especies de aves.
- Incluidas las aves cantoras silvestres y domésticas, además de las especies que no aprenden a cantar.
- Controlado para variables no cognitivas y antecedentes filogenéticos.
Principales resultados:
- Las especies con mayores habilidades de aprendizaje vocal demostraron habilidades superiores de resolución de problemas.
- Se encontró una correlación positiva entre el aprendizaje vocal y el tamaño relativo del cerebro.
- Estos hallazgos se mantuvieron significativos después de controlar los factores de confusión.
Conclusiones:
- La capacidad de aprendizaje vocal se asocia con una mayor capacidad de resolución de problemas y cerebros más grandes en las aves cantoras.
- Los resultados apoyan los fundamentos genéticos y cognitivos compartidos para el aprendizaje vocal, la resolución de problemas y la evolución del cerebro.
- Este estudio proporciona evidencia entre especies para los correlatos cognitivos del aprendizaje vocal.
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