Summary
South American male toads Bufo chilensis emit a release call in contact with other individuals and a soft amplectic call, B. spinulosus males emit a release call while isolated in breeding areas, and B. arenarum produces a release call plus an intense mating call. Release calls of the 3 species measure 72–86 dB SPL RMS at 20 cm in front of the animal and the mating call of B. arenarum is 84–87 dB SPL at 4 m.
Audiograms obtained with multiunit recordings in the torus semicircularis (TS) show a low frequency region (LFR), centered at 352, 356 and 491 Hz, and a high frequency region (HFR), centered at 1199, 1161 and 1423 Hz, in B. chilensis, B. spinulosus and B. arenarum, respectively. Center frequencies (CFs) in the HFR are in gross correspondence with average dominant frequencies (DFs) of the vocalizations of these species. Best thresholds (BTs) in the HFR are similar between B. chilensis and B. arenarum while in B. spinulosus average BTs are 10.8 and 13.5 dB higher, respectively. The similar auditory thresholds between B. chilensis and B. arenarum denote a conservative nature of auditory sensitivity among these anura.
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Abbreviations
- AP :
-
amphibian papilla
- BP :
-
basilar papilla
- BT :
-
best threshold
- CF :
-
center frequency
- DF :
-
dominant frequency
- HFR :
-
high frequency region
- LFR :
-
low frequency region
- TS :
-
torus semi-circularis
- SPL :
-
sound pressure level
References
Blair WF (1972) Evidence from hybridization. In: Blair WF (ed) Evolution in the genus Bufo. Univ Texas Press, Austin London, pp 196–232
Brown LE, Guttman SI (1970) Natural hybridization between the toads Bufo arenarum and Bufo spinulosus in Argentina. Am Midl Nat 83:160–166
Brzoska J, Walkowiak W, Schneider H (1977) Acoustic communication in the grass frog (Rana t. temporaria L.): calls, auditory thresholds and behavioral responses. J Comp Physiol A 118:173–186
Capranica RR, Frishkopf LS, Nevo E (1973) Encoding of geographic dialects in the auditory system of the cricket frog. Science 182:1272–1275
Capranica RR, Moffat AJM (1983) Neurobehavioral correlates of sound communication in anurans. In: Ewert JP, Capranica RR, Ingle D (eds) Advances in vertebrate neuroethology. Plenum Press, New York, pp 701–730
Duellman WE, Trueb L (1986) Biology of amphibians. McGraw-Hill, New York
Hillery CM (1984) Seasonality of two midbrain auditory responses in the treefrog, Hyla chrysoscelis, Copeia 1984:844–852
Hubl L, Schneider H (1979) Temperature and auditory thresholds: bio-acoustic studies of the frogs Rana r. ridibunda, Hyla a. arborea and Hyla a. savignyi (Anura, Amphibia). J Comp Physiol 130:17–27
Jaslow AP, Hetherington TE, Lombard RE (1988) Structure and function of the amphibian middle ear. In: Fritzsch B, Ryan MJ, Wilczynski W, Hetherington TE, Walkowiak W (eds) The evolution of the amphibian auditory system. Wiley, New York, pp 69–91
Lewis ER (1978) Comparative aspects of the anuran auditory papillae. Scan Electr Microsc 2:633–642
Lewis ER, Lombard ER (1988) The amphibian inner ear. In: Fritzsch B, Ryan MJ, Wilczynski W, Hetherington TE, Walkowiak W (eds) The evolution of the amphibian auditory system. Wiley, New York, pp 93–124
Lewis ER, Baird RA, Leverenz EL, Koyama H (1982) Inner ear: Dye injection reveals peripheral origins of specific sensitivities. Science 215:1641–1643
Loftus-Hills JJ (1973) Comparative aspects of auditory function in Australian anurans. Aust J Zool 21:353–367
Loftus-Hills JJ, Johnstone BM (1970) Auditory function, communication, and the brain-evoked response in anuran amphibians. J Acoust Soc Am 47:1131–1138
Lombard ER, Straughan IR (1974) Functional aspects of anuran middle ear structures. J Exp Biol 61:71–93
Martin WF (1972) Evolution of vocalization in the genus Bufo. In: Blair WF (ed) Evolution in the genus Bufo. Univ Texas Press, Austin London, pp 196–232
Moffat AJM, Capranica RR (1978) Middle ear sensitivity in anurans and reptiles measured by light scattering spectroscopy. J Comp Physiol 127:97–107
Mohneke R, Schneider H (1979) Effect of temperature upon auditory thresholds in two anuran species, Bombina v. variegata and Alytes o. obstetricans (Amphibia, Discoglossidae). J Comp Physiol A 130:9–16
Narins PM, Zelick R (1988) Effects of noise on auditory processing and behavior. In: Fritzsch B, Ryan MJ, Wilczynski W, Hetherington TE, Walkowiak W (eds) The evolution of the amphibian auditory system. Wiley, New York, pp 511–536
Penna M, Veloso A (1981) Acoustical signals related to reproduction in the spinulosus species group of Bufo (Amphibia, Bufonidae). Can J Zool 59:54–60
Penna M, Robles L, Vargas C (1986) Auditory responses in the eighth nerve of a mating call-less toad, Bufo chilensis (Amphibia: Bufonidae). Comp Biochem Physiol 84A:625–631
Roberts WM, Robles L, Hudspeth AJ (1986) Correlation between the kinetic properties of ionic channels and the frequency of membrane-potential resonance in hair cells of the bullfrog. In: Moore BCJ, Paterson RD (eds) Auditory frequency selectivity. Plenum Press, New York London, pp 89–95
Robertson JGM (1984) Acoustic spacing by breeding males of Uperoleia rugosa (Anura: Leptodactylidae). Z Tierpsychol 57:209–214
Ryan MJ, Wilczynski WW (1988) Coevolution of sender and receiver: effect on local mate preference in cricket frogs. Science 240:1786–1788
Shofner WP, Feng AS (1981) Post-metamorphic development of the frequency selectivities and sensitivities of the peripheral auditory system of the bullfrog, Rana catesbeiana. J Exp Biol 93:181–196
Shofner WP, Feng AS (1984) Quantitative light and scanning electron microscopic study of the developing auditory organs in the bullfrog: Implications on their functional characteristics. J Comp Neurol 224:141–154
Sullivan BK, Wagner WE (1988) Variation in advertisement and release calls, and social influences on calling behavior in the Gulf Coast toad (Bufo valliceps). Copeia 1988:1014–1020
Veloso A, Penna M (1981) Interacción genómica en hibridos de Bufo (Amphibia-Bufonidae). Arch Biol Med Exp 14:89
Walkowiak W (1980) Sensitivity, range and temperature dependence of hearing in the grass frog and fire-bellied toad. Behav Process 5:363–372
Walkowiak W (1988) Two auditory filter systems determine the calling behavior of the fire-bellied toad: a behavioral and neurophysiological characterization. J Comp Physiol A 164:pp 31–41
Walkowiak W, Capranica RR, Schneider H (1981) A comparative study of auditory sensitivity in the genus Bufo (Amphibia). Behav Process 6:223–237
Wells KD (1977) The social behavior of anuran amphibians. Anim Behav 25:666–693
Wilczynski WW, Capranica RR (1984) The auditory system of anuran amphibians. Prog Neurobiol 22:1–38
Wilczynski WW, Zakon HH, Brenowitz EA (1984) Acoustic communication in spring peepers. Call characteristics and neurophysiological aspects. J Comp Physiol A 155:577–584
Wilczynski WW, Resler C, Capranica RR (1988) Tympanic and extratympanic sound transmission in the leopard frog. J Comp Physiol A 161:659–669
Zakon HH, Wilczynski WW (1988) The physiology of the anuran eighth nerve. In: Fritzsch B, Ryan MJ, Wilczynski W, Hetherington TE, Walkowiak W (eds) The evolution of the amphibian auditory system. Wiley, New York, pp 125–156
Zelick R, Narins PM (1985) Temporary threshold shift, adaptation, and recovery characteristics of frog auditory nerve fibers. Hearing Res 17:161–176
Zweifel RG (1968) Effects of temperature, body size, and hybridization on mating calls of toads, Bufo a. americanus and Bufo woodhousii fowleri. Copeia 1968:269–285
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Penna, M., Palazzi, C., Paolinelli, P. et al. Midbrain auditory sensitivity in toads of the genus Bufo (amphibia — bufonidae) with different vocal repertoires. J Comp Physiol A 167, 673–681 (1990). https://doi.org/10.1007/BF00192661
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DOI: https://doi.org/10.1007/BF00192661