Call and be counted! Can we reliably estimate the number of callers in the indri's (Indri indri) song?

ABSTRACT: Estimating the number of animals participating in a choral display may contribute reliable information on animal population estimates, particularly when environmental or behavioral factors restrict the possibility of visual surveys. Difficulties in providing a reliable estimate of the number of singers in a chorus are many (e.g., background noise masking, overlap). In this work, we contributed data on the vocal chorusing of the indri lemurs (Indri indri), which emit howling cries, known as songs, uttered by two to five individuals. We examined whether we could estimate the number of emitters in a chorus by screening the fundamental frequency in the spectrograms and the total duration of the songs, and the reliability of those methods when compared to the real chorus size. The spectrographi

SUBMITTER: Torti V 

PROVIDER: S-EPMC6075759 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature