@article {58052, title = {Use of vocal signatures for the inventory of free-flying Neotropical bats}, journal = {BiotropicaBiotropica}, volume = {31}, number = {3}, year = {1999}, pages = {507-516}, abstract = {

An ongoing study is being conducted to test the efficacy of the Anabat II detector and analysis system in obtaining reliable vocal signatures for the identification of non-phyllostomid species of bats. We sampled a wide range of elevations and associated habitat types throughout Belize. Anabat provides an instantaneous output of echolocation call structure with a laptop computer. Select sequences can be saved directly to the hard drive, avoiding extraneous noise and sound distortion commonly associated with tape recorders. To date, 18 of the 37 species known or expected
to occur in the study region were identified by recognizable differences in the time-frequency characteristics of echolocation calls. In general, each family is recognizable by call structure patterns and species readily separated by frequency range parameters. Species that commute or forage at high altitudes are not susceptible to capture but are conspicuous by acoustic sampling. Further work is needed to determine limitations of the equipment, establish better sampling procedures, and develop a comprehensive library of vocal signatures incorporating the range of variation
inherent in each species. As this work progresses, we predict the addition of hitherto unknown species occurring within the study region.

}, keywords = {acoustic identification, Anabat, bats, Bauerus dubiaquercus, Chiroptera, diversity assessment, Emballonuridae, Eptesicus furinalis, inventory, Mormoopidae, Mormoops megalophylla, Myotis elegans, Neotropics, Noctilio leporinus, Pteronotus davyi, Pteronotus parnellii, Pteronotus personatus, Rhogeessa tumida, Saccopteryx bilineata, Saccopteryx leptura}, author = {O{\textquoteright}Farrell, Michael J. and Miller, Bruce W.} } @article {58026, title = {The Vocal Repertoire of Golden-Faced Sakis, Pithecia chrysocephala, and the Relationship Between Context and Call Structure}, year = {2020}, abstract = {

Vocalizations are a vital form of communication. Call structure and use may change depending on emotional arousal, behavioral context, sex, or social complexity. Pithecia chrysocephala (golden-faced sakis) are a little-studied Neotropical species. We aimed to determine the vocal repertoire of P. chrysocephala and the influence of context on call structure. We collected data June\–August 2018 in an urban secondary forest fragment in Manaus, Amazonian Brazil. We took continuous vocal recordings in 10-min blocks with 5-min breaks during daily follows of two groups. We recorded scan samples of group behavior at the start and end of blocks and used ad libitum behavioral recording during blocks. We collected 70 h of data and analyzed 1500 calls. Lowest frequencies ranged 690.1\–5879 Hz in adults/subadults and 5393.6\–9497.8Hz in the only juvenile sampled. We identified eight calls, three of which were juvenile specific. We found that, while repertoire size was similar to that of other New World monkeys of similar group size and structure, it also resembled those with larger group sizes and different social structures. The durations of Chuck calls were shorter for feeding contexts compared to hostile, but frequencies were higher than predicted if call structure reflects motivation. This finding may be due to the higher arousal involved in hostile situations, or because P. chrysocephala use Chuck calls in appeasement, similar to behavior seen in other primates. Call structures did not differ between sexes, potentially linked to the limited size dimorphism in this species. Our findings provide a foundation for further investigation of Pithecia vocal behavior and phylogeny, as well as applications for both captive welfare (stress relief) and field research (playbacks for surveys).

}, keywords = {Behavior, communication, Neotropics, Pitheciidae, Welfare}, doi = {10.1007/s10764-019-00125-7}, url = {http://link.springer.com/10.1007/s10764-019-00125-7}, author = {Muir, Jen and Barnett, Adrian and Svensson, Magdalena S.} }