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Los cuervos "cuentan" el número de vocalizaciones que generan ellos mismos
Diana A Liao1, Katharina F Brecht1, Lena Veit2
1Animal Physiology, Institute of Neurobiology, University of Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany.
Science (New York, N.Y.)
|May 23, 2024
Resumen
Los cuervos pueden producir un número específico de vocalizaciones (de una a cuatro) basadas en señales, demostrando habilidades numéricas y control vocal. Sus vocalizaciones sugieren planificación y detección de errores durante el conteo.
Área de la Ciencia:
- Etología cognitiva
- Comunicación con los animales
- Psicología comparada
Sus antecedentes:
- Producir vocalizaciones con propósito requiere habilidades numéricas y control vocal.
- La existencia de tales habilidades en animales no humanos sigue siendo en gran medida inexplorada.
Objetivo del estudio:
- Investigar si los cuervos poseen la capacidad de una producción vocal flexible y guiada numéricamente.
- Para determinar si los cuervos pueden asociar señales arbitrarias con vocalizaciones específicas.
Principales métodos:
- A los cuervos se les presentaron señales visuales arbitrarias vinculadas a valores numéricos (de uno a cuatro).
- Se registraron y analizaron las vocalizaciones producidas por los cuervos en respuesta a las señales.
- Se examinaron las características acústicas de las vocalizaciones y secuencias individuales para inferir los procesos cognitivos.
Principales resultados:
- Los cuervos producen secuencias flexibles de una a cuatro vocalizaciones correspondientes a las señales presentadas.
- Las propiedades acústicas de la vocalización inicial predijeron la longitud total de la secuencia, lo que sugiere una planificación.
- Las características acústicas de las unidades vocales indicaban su posición en la secuencia y revelaban errores de conteo.
Conclusiones:
- Los cuervos muestran habilidades numéricas sofisticadas y control vocal, lo que les permite producir vocalizaciones con propósito.
- Los hallazgos sugieren que los cuervos participan en la planificación y el monitoreo de errores durante la producción de la secuencia vocal, similar a contar.
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