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- W2004686411 abstract "Localizations from 15 West Indian manatees (T.m. manatus) and 14 Amazonian manatees (T. inunguis) were recorded and selected for spectral analysis. Several physical parameters of these vocalizations were used to describe and compare the vocal repertoires of these two species. Five of those variables were used in a principal components analysis (PCA) in order to verify if the vocal parameters could be grouped by species. Both approaches (repertoire comparison and PCA) discriminated these two species. The main differences were in the limits of the fundamental frequency (range) of each species, 1.07 to 8 kHz for (T. inunguis) and 1.07 to 4.98 kHz for (T.m. manatus), and the number of notes per vocalization. Only the Amazonian manatee presented more than one note (1 to 4) per vocalization. The first axis of the PCA explained almost 70% of the data variation. The most important variables in this axis were related to the fundamental frequency. Therefore, the characteristics of the fundamental frequency are responsible for the discrimination of the vocal patterns of (T. inunguis) and (T.m. manatus). Such patterns are specie-specific and could be used as a taxonomic feature. [Work supported by FBPN, MacArthur Foundation, Conservation International, USFWS, and CNPq.]" @default.
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- W2004686411 date "1999-10-01" @default.
- W2004686411 modified "2023-10-08" @default.
- W2004686411 title "Vocal discrimination of two species of manatees (Trichechus inunguis) and (T. manatus manatus) in Brazil" @default.
- W2004686411 doi "https://doi.org/10.1121/1.427204" @default.
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