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Titolo:
Hearing in a megachiropteran fruit bat (Rousettus aegyptiacus)
Autore:
Koay, G; Heffner, RS; Heffner, HE;
Indirizzi:
Univ Toledo, Dept Psychol, Toledo, OH 43606 USA Univ Toledo Toledo OH USA43606 oledo, Dept Psychol, Toledo, OH 43606 USA
Titolo Testata:
JOURNAL OF COMPARATIVE PSYCHOLOGY
fascicolo: 4, volume: 112, anno: 1998,
pagine: 371 - 382
SICI:
0735-7036(199812)112:4<371:HIAMFB>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIG BROWN BAT; EPTESICUS-FUSCUS; AUDITORY-SENSITIVITY; SOUND LOCALIZATION; EXTERNAL EAR; UNDERWATER AUDIOGRAM; RAT; THRESHOLDS; ECHOLOCATION; MAMMALS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
82
Recensione:
Indirizzi per estratti:
Indirizzo: Heffner, RS Univ Toledo, Dept Psychol, Toledo, OH 43606 USA Univ Toledo Toledo OH USA 43606 Psychol, Toledo, OH 43606 USA
Citazione:
G. Koay et al., "Hearing in a megachiropteran fruit bat (Rousettus aegyptiacus)", J COM PSYCH, 112(4), 1998, pp. 371-382

Abstract

The Egyptian fruit bat (Rousettus aegyptiacus) is one of the few megachiropteran bats capable of echolocation. However, it uses rudimentary tongue clicks rather than laryngeally produced echo calls. We determined the audiogram of 2 bats using a conditioned avoidance procedure with fruit puree reward. At an intensity of 60 dB sound pressure level, the bats' hearing extended from 2.25 kHz to 64 kHz, with a region of good sensitivity between 8 kHz and 45 kHz. A dip in sensitivity at 32 kHz appears to be due to pinna directionality. The hearing of Egyptian fruit bats is typical for a mammal of that size and is not as Limited as previously reported. Methodological issues, specifically training an animal to listen for low-intensity signals and imposing a significant cost for failing to report signals (i.e., misses), are discussed as the basis for the discrepancy between our results and earlier reports.

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Documento generato il 05/12/20 alle ore 22:49:55