1 resultado para Tonal Sounds
em Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España
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Resumo:
Las crías Caretta caretta durante la eclosión y antes de salir del nido, emiten sonidos asociados a crujido y raspado del corion, así como chillidos, silbidos y tos, en un rango de frecuencia entre los 300 y 2600 Hz. No obstante, los silbidos y chillidos, que pueden ser asociables a un sistema de vocalización, se emiten a una frecuencia (1500-2600 Hz) mucho mayor al rango de sensibilidad descrito para esta especie (250-1000 Hz) y por tanto imperceptibles para ellas. Sin embargo, los sonidos producidos como consecuencia de ejercicios de respiración y expulsión de arena de las vías respiratorias, acompañados de tos (300-1200 Hz), por parte de las crías recién eclosionadas, son los únicos sonidos que podrían servir de señal y estimulación a la eclosión del resto de crías en el nido. ABSTRACT The hatchlings Caretta caretta, during the eclosion and before the abandon of their nest, produce sounds associated to creakling and scrape of the eggshell, and howl, whistle and cough, in a frequency range between 300 and 2600 Hz. Nevertheless, the howls and whistles, that could be associated to a vocalization apparatus, were emitted at a higher frequency (1500-2600 Hz) than the auditory range describe for this species (250-1000 Hz), and therefore probably inaudible for them. However, sounds generated as a consequence of breathing exercises and sand expulsion from the airways through coughs (300- 1200 Hz), by the recently hatched turtles, could be used as signal or stimulus for the hatch of the reminder eggs in the nest.