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Una forma diferente de visión del color en el camarón mantis
Hanne H Thoen1, Martin J How, Tsyr-Huei Chiou
1Queensland Brain Institute, University of Queensland, Brisbane, Queensland 4072, Australia.
Science (New York, N.Y.)
|January 25, 2014
Resumen
El camarón mantis posee ojos complejos con 12 fotorreceptores, pero exhiben una pobre discriminación del color. Su sistema visual único probablemente utiliza la señalización temporal y los movimientos oculares para el reconocimiento de color, no la visión de color convencional.
Área de la Ciencia:
- * Investigación comparativa de la visión.
- * Comportamiento animal y biología sensorial.
Sus antecedentes:
- * Los crustáceos estomatópodos (camarones mantis) exhiben sistemas visuales excepcionalmente complejos.
- * Estos animales poseen hasta 12 tipos distintos de fotorreceptores, que cubren un amplio espectro desde la luz ultravioleta profunda hasta el rojo lejano (300720 nm).
- * El significado funcional de esta complejidad cromática sigue siendo un misterio científico, ya que supera la diversidad de fotorreceptores que se encuentran en los seres humanos.
Objetivo del estudio:
- * Para investigar la base funcional de la visión compleja de los colores del camarón mantis.
- * Para determinar si su sistema visual emplea la codificación convencional de color-oponente para la discriminación de colores finos.
Principales métodos:
- * Se llevaron a cabo experimentos de comportamiento para evaluar las habilidades de discriminación de longitud de onda en estomatópodos.
- * Análisis de los mecanismos de procesamiento visual, incluidos los movimientos oculares y la señalización temporal.
Principales resultados:
- * Los estomatópodos demostraron un rendimiento sorprendentemente pobre en las pruebas de discriminación de longitud de onda conductual.
- * Los resultados descartaron la participación de un sistema de codificación de color oponente convencional para la discriminación de color.
- * La evidencia sugiere que se emplea un nuevo sistema de visión en color.
Conclusiones:
- * Es probable que los camarones mantis utilicen un sistema único de visión del color basado en la señalización temporal y el escaneo de los movimientos oculares.
- * Este sistema permite una forma de reconocimiento de color en lugar de una discriminación de color fino.
- * El estudio revela un mecanismo previamente desconocido de la percepción del color en el reino animal.
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