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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
PubMed
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.

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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.