Literaturdatenbank
Literaturdatenbank |
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Vasil'ev, B. D., & Smirnov, S. V. (1981). Auditory sensitivity of turtles. Moscow University biological sciences bulletin, 36(4), 9–14.
Added by: Sarina Wunderlich (18 Nov 2012 17:47:10 UTC) |
| Resource type: Journal Article BibTeX citation key: Vasilev1981 View all bibliographic details  |
Categories: General Keywords: akustische Kommunikation = acoustic communication, Emydidae, Emys, Emys orbicularis, Physiologie = physiology, Schildkröten = turtles + tortoises, Testudinidae, Testudo, Testudo graeca Creators: Smirnov, Vasil'ev Collection: Moscow University biological sciences bulletin |
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| Abstract |
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Testudinidae The middle ear of turtles, which perceives sounds in air by means of the normal tympanal-stapedial principle, is distinguished by an extremely thick tympanal membrane; a long, monolithic columellar system that penetrates the quadrate bone; and poor adaptive variabilty of the auditory analyzer. Experiments were conducted to determine the characteristics of the middle-ear elements in four species of Euro-Asian turtles: the fresh-water turtle (Emys orbicularis), Caspian turtle (Clemmys caspica), the steppe tortoise (Testudo horsfieldi), and the spur-thighed Mediterranean land tortoise (Testudo graeca). The evoked potentials recorded from the medullary auditory nucleus of these species indicated that their perception of sounds was limited to a narrow range of low frequencies (100-150 Hz), and that their capacity for discriminating the character of auditory stimuli (noise and pure tones) and evaluation of their amplitude-frequency and temporal parameters is limited.
Added by: Sarina Wunderlich |