首页|Advertisement call of Johnstone's whistling frog Eleutherodactylus johnstonei in Brazil
Advertisement call of Johnstone's whistling frog Eleutherodactylus johnstonei in Brazil
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NSTL
Anuran advertisement calls play a role in attracting potential mates and can vary among individuals and populations. Here we describe the advertisement call of a non-native population of Eleutherodactylus johnstonei in S?o Paulo, Brazil and compare our data with other non-native populations in other countries. The advertisement calls of E. johnstonei show two-tonal frequency-modulated notes differing in spectral and temporal patterns. The first note is shorter and has lower frequencies than the second note. Our comparisons indicate that, except for the Montserrat population, the calls of the Brazilian population of E. johnstonei are similar to the other populations in terms of the call and note duration. Concerning spectral parameters, except for Bucaramanga (Colombia) and Caracas (Venezuela) populations, the dominant frequency of the first note is lower in the Brazilian population than in other localities. The advertisement call variations of E. johnstonei seem unrelated to morphological differentiation or the length of time since the population was introduced, but may reflect local female preferences or adaptation to environmental factors.
NSTL
