DefinePK

Abstract

<jats:p>Considering importance of acoustics studies in population biology, 500 calls of the Indian House Crow (Corvus
splendens) were recorded in morning - mid-afternoon hours (January-February, 2009) from 23 sites of urban
areas of Potahar (Punjab, Pakistan). Calls were recorded using Sony CFS 1030 S sound records (sampling rate =
48 KHz) and edited using Sound Analysis Pro (Version 1.02). software using FFT method rate 50%, data
window 9.27 ms, advanced window 1.36 ms. Through editing of calls, we selected 60 (37 ƃƃ, 17 ƂƂ, 6
Juvenile ƃƃ) good quality spectrograms for detailed analysis. Spectrograms were characterized by rapid
frequency modulations using 6 (call pitch, mean pitch goodness, mean frequency of the calls, frequency of
modulations, mean amplitude modulation, mean wiener entropy) acoustic parameters. Significance of difference
was analysed using Multivariate and Discriminate Function Analysis. Calls could be assigned to correct
individual in 10.8% males, 21.0% females, and 42.9% juveniles, which was significantly higher than percentage
of correct classification per chance. Calls could be attributes to correct sex in 88.5% and to correct age group in
80.6% of cases.</jats:p>