01250nas a2200133   4500008004100000245005500041210005500096300001200151490000700163520085100170653002001021100002101041856005401062       1981                        eng d00aSound Levels of Mating Calls of Some African Frogs0 aSound Levels of Mating Calls of Some African Frogs  a166-1710 v373 aSound pressure levels of mating calls of 17 subtropical African frogs [Bufonidae Bufo gutturalis, B. garmani; Microhylidae Phrynomerus bifasciatus; Randiae Tomopterna cryptotis, T. krugerensis, Ptychadena anchietae, P. mossambica, Phrynobatrachus natalensis, P. mababiensis, Cacosternum boettgeri, Hyperolius tuberilinguis, H. argus, H. pusillus, H. marmoratus, Afrixalus brachycnemis, A. fornasinii and Kassina maculata] were measured in the field. Peak levels ranged from 92 (measured at 25 cm) to 120 dB (measured at 50 cm). No clear relationship was found between species size and call intensity. Intraspecific variation in sound pressure level of calls ranged from 0.5-10.5 dB. Successive mating calls of most individuals varied by 1.5 dB or less. The sound fields surrounding calling animals were directional in 6 of the 7 species examined.10aPhrynobatrachus1 aPassmore, N., I.  uhttps://africanamphibians.myspecies.info/node/651