@article {57914, title = {Molossid unlimited: extraordinary extension of range and unusual vocalization patterns of the bat, Promops centralisAbstract}, year = {2019}, abstract = {

The big crested mastiff bat, Promops centralis, occurs in Central and South America, but knowledge of its ecology is limited due to its open space hunting strategy, making captures extremely challenging. Notwithstanding, members of the species produce echolocation calls that are easy to identify. After recording calls of P. centralis 1,500 km away from its known range in Brazil, we hypothesized that the distribution range of this species was probably greatly underestimated. To improve the accuracy of P. centralis\’ real distribution, we employed acoustic surveys throughout parts of Brazil, conducted after a bibliographic review to gather additional records, and used MaxEnt to model the species\’ potential distribution. We have found that P. centralis has a much wider distribution in South America than previously thought, adding more than 3.8 million km2 to its former known area. We also describe an unusual vocalization pattern of P. centralis, with individuals emitting at least three very distinct but highly variable calls. This study shows that bioacoustic surveys and species distribution models can complement traditional methodologies in studying species that are difficult to capture, such as P. centralis, potentially contributing to more effective conservation and management plans.

}, keywords = {big crested mastiff bat, Chiroptera, duty cycle, echolocation calls, frequency, MaxEnt, Molossidae, Social calls, species distribution modeling, vocalizations}, doi = {10.1093/jmammal/gyz167}, url = {https://academic.oup.com/jmammal/advance-article/doi/10.1093/jmammal/gyz167/5637356}, author = {Hintze, Frederico and Arias-Aguilar, Adriana and Dias-Silva, Leonardo and Delgado-Jaramillo, Mariana and Silva, Carina Rodrigues and Juc{\'a}, Thays and Mischiatti, Francyne Lyrio and Almeida, M{\'a}rcio and Bezerra, Bruna and Aguiar, Ludmilla M S and Ramos Pereira, Maria Jo{\~a}o and Bernard, Enrico}, editor = {Loeb, Susan} } @article {53026, title = {The influence of age and sex on the vocal repertoire of the Antillean manatee ( Trichechus manatus manatus ) and their responses to call playback}, journal = {Marine Mammal Science}, volume = {34}, year = {2018}, month = {Jan-07-2018}, pages = {577 - 594}, abstract = {

Limited information is available regarding the acoustic communication of Antillean manatees, however, studies have shown that other manatee taxa produce vocalizations as a method of individual recognition and communication. Here, the acoustic signals of 15 Antillean manatees in captivity were recorded, aiming to (1) describe their acoustic repertoire, (2) investigate the influence of sex and age on vocalization, and (3) examine manatee responses to call playback. Six acoustic signals ranging in mean fundamental frequencies from 0.64 kHz to 5.23 kHz were identified: squeaks and screeches were common to adult males, adult females, and juveniles; trills were common to adult males and females; whines were specific to males; creaks were specific to females; and rubbing was specific to juveniles. The structure of squeak vocalizations was significantly different between age and sex classes and screech structure was significantly different between age classes. Squeaks and screeches produced by juveniles had higher frequencies of maximum energy when compared to those produced by adult males and females. A significant increase in the vocalization rate following vocalization playbacks was found for all three age/sex groups. Our results introduce the potential of using acoustic signals in identifying and noninvasively monitoring manatees in the wild in Brazil.

}, doi = {10.1111/mms.v34.310.1111/mms.12467}, url = {http://doi.wiley.com/10.1111/mms.v34.3}, author = {Umeed, Rebecca and Niemeyer Attademo, Fernanda L{\"o}ffler and Bezerra, Bruna} }