Literaturdatenbank
Literaturdatenbank |
|
 |
|
Martin, K. J., Alessi, S. C., Gaspard, J. C., Tucker, A. D., Bauer, G. B., & Mann, D. A. (2012). Underwater hearing in the loggerhead turtle (caretta caretta): a comparison of behavioral and auditory evoked potential audiograms. Journal of Experimental Biology, 215, 3001–3009.
Added by: Sarina Wunderlich (18 Nov 2012 17:43:43 UTC) |
| Resource type: Journal Article DOI: 10.1242/jeb.066324 BibTeX citation key: Martin2012a View all bibliographic details  |
Categories: General Keywords: Caretta, Caretta caretta, Cheloniidae, Physiologie = physiology, Schildkröten = turtles + tortoises Creators: Alessi, Bauer, Gaspard, Mann, Martin, Tucker Collection: Journal of Experimental Biology |
Views: 6/604
Views index: 14% Popularity index: 3.5% |
| Abstract |
|
The purpose of this study was to compare underwater behavioral and auditory evoked potential (AEP) audiograms in a single captive adult loggerhead sea turtle (Caretta caretta). The behavioral audiogram was collected using a go/no-go response procedure and a modified staircase method of threshold determination. AEP thresholds were measured using subdermal electrodes placed beneath the frontoparietal scale, dorsal to the midbrain. Both methods showed the loggerhead sea turtle to have low frequency hearing with best sensitivity between 100 and 400 Hz. AEP testing yielded thresholds from 100 to 1131 Hz with best sensitivity at 200 and 400 Hz (110 dB re. 1 μPa). Behavioral testing using 2 s tonal stimuli yielded underwater thresholds from 50 to 800 Hz with best sensitivity at 100 Hz (98 dB re. 1 μPa). Behavioral thresholds averaged 8 dB lower than AEP thresholds from 100 to 400 Hz and 5 dB higher at 800 Hz. The results suggest that AEP testing can be a good alternative to measuring a behavioral audiogram with wild or untrained marine turtles and when time is a crucial factor.
Added by: Sarina Wunderlich |