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Los grajos (Corvus frugilegus) pueden mostrar flexibilidad vocal espontánea cuando se exponen a sonidos rítmicos de
K Martin1,2, M Tomasek3,4, A Hivet3
1Ecole Normale Supérieure de Lyon, 69007, Lyon, France. killian.martin@ens-lyon.fr.
Animal cognition
|January 26, 2026
Resumen
Los grajos muestran cierta flexibilidad vocal cuando se exponen a sonidos rítmicos, y algunos individuos ajustan sus cantos al tempo y al compás. Se necesita más investigación para confirmar la sincronización vocal en estas aves.
Área de la Ciencia:
- Comportamiento Animal; Bioacústica; Biología Evolutiva
Sus antecedentes:
- La musicalidad en humanos implica la sincronización auditivo-rítmica, conocida como arrastre.; Si bien los primates no humanos tienen un arrastre limitado, las aves exhiben habilidades avanzadas, lo que sugiere una evolución convergente.; La investigación del arrastre en córvidos sociales como los grajos puede arrojar luz sobre los orígenes evolutivos compartidos de la musicalidad.
Objetivo del estudio:
- Investigar la sincronización vocal espontánea en grajos (Corvus frugilegus).; Examinar cómo el tempo y la estructura métrica de los estímulos auditivos afectan la sincronización vocal de los grajos.; Explorar posibles orígenes evolutivos convergentes del procesamiento rítmico en aves.
Principales métodos:
- Se expuso a grajos a secuencias de sonido no biológicamente relevantes con tempo y compás variables.; Se registraron y analizaron las vocalizaciones de grajos individuales para detectar ajustes temporales.; El análisis se centró en las vocalizaciones producidas en respuesta a diferentes estímulos auditivos.
Principales resultados:
- Ocho de los once grajos examinados vocalizaron durante la estimulación auditiva.; Tres aves cantaron lo suficiente para un análisis detallado de las respuestas al tempo y al compás.; Dos individuos mostraron ajustes: uno alteró la duración de las vocalizaciones con el tempo, otro redujo los intervalos en respuesta al compás unario y al tempo lento.
Conclusiones:
- Los grajos exhiben flexibilidad vocal en respuesta a estímulos auditivos rítmicos.; Algunos grajos pueden intentar la sincronización vocal, pero no se observó una sincronización precisa.; Los grajos y otras aves cantoras son modelos valiosos para estudiar la percepción rítmica y la evolución de la musicalidad.
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