@article {53349, title = {Effects of hydroelectric turbine noise on the behaviour of Leporinus taeniatus (Characiformes: Anostomidae) in captivity}, journal = {Journal of Ethology}, year = {2018}, month = {Oct-11-2019}, abstract = {

Hydroelectric power plants (HPP) constitute one of the main forms of energy generation in the world, and its operation produces underwater noise through generators and turbines, which can potentially impact the aquatic fauna. Anthropogenic noise is a stressful factor and can affect behaviour, physiology and acoustic communication of many animal species. However, the noise impact produced by HPP on fishes has not been studied yet. In this research we investigated the noise impact of hydroelectric turbines on the behaviour of Leporinus taeniatus held captive in Brazil. We tested the hypothesis that noise could disturb fishes\’ behaviour by affecting school organization, fish position in the tank and the speed of swimming. Two groups of 10 individuals were exposed to 30 sessions of noise played at an intensity of 100 dB re 1 \µPa, during 40 s on days 0, 7 and 14. Behavioural data were obtained before, during, and after noise exposure. Results showed that the fish swam significantly faster, moving to the bottom and swimming in depolarised shoals during noise exposure in both groups. Temporal analysis showed that during noise exposure fish swam faster, were less stationary and used the bottom of the tanks more throughout sampling period. These data provide evidence that fish behaviour can be affected by the aversive stimulus of the noise of a hydroelectric turbine in operation. It also suggests that sound pollution issues should be taken into consideration when regulating the use of natural areas for HPP.

}, keywords = {anthropogenic noise, Brazil, Characins, Fish behaviour, Hydroelectric impact, S{\~a}o Francisco River basin}, issn = {0289-0771}, doi = {10.1007/s10164-018-0568-6}, url = {http://link.springer.com/10.1007/s10164-018-0568-6}, author = {Duarte, Marina H. L. and Melo, Rafael M. C. and Marina D. A. Scarpelli and Carvalho, Thiago M. A. and Padovese, Linilson R. and Bazzoli, Nilo and Rizzo, Elizete} } @article {53334, title = {Geographic variation in the advertisement call of Trachycephalus typhonius Anura: Hylidae) based on South American samples}, journal = {Zootaxa}, volume = {4521}, year = {2018}, month = {Feb-11-2019}, pages = {404}, abstract = {

Previously described calls of Trachycephalus typhonius (Linnaeus, 1758) correspond to several populations from Central and South America, but in general, these descriptions were brief and often based on a single recorded individual. Here, based on an expressive sample, we re-describe the advertisement calls of T. typhonius using recordings from populations in Brazil and Argentina. Additionally, we discuss geographical variation of calls, comment on their frequency band structure and compare calls with those described for other species of Trachycephalus. Calls of 32 males were recorded and temporal and spectral features of 269 calls were measured. To search for discrimination among three populations sampled we used the Random Forest (RF) model, Multidimensional Scaling Analysis (MDS) and Wilcoxon-Mann-Whitney Rank Sum Test. The advertisement calls of T. typhonius consist of a multipulsed note of 343\–540 ms of duration, emitted at regular intervals, with up to three emphasized frequency bands. Dominant frequency ranged between 1705\–2750 Hz. Calls from Rond\ônia (Brazil) were significantly different from those recorded in Argentina and Minas Gerais (Brazil) in relation to pulse rate and dominant frequency. Populations from Minas Gerais and Argentina differed in dominant frequency of calls. Such population differences can be partly attributed to differences in prevalence of calling sites (immersed in water vs. perches on vegetation), but can also hint at the existence of cryptic species diversity under this taxon.

}, keywords = {Amazon Milk Frog, Amphibia, Argentina, Brazil, call structure, differentiation, vocalizations}, issn = {1175-5326}, doi = {10.11646/zootaxa.4521.310.11646/zootaxa.4521.3.6}, url = {https://biotaxa.org/Zootaxa/issue/view/zootaxa.4521.3https://biotaxa.org/Zootaxa/article/view/zootaxa.4521.3.6}, author = {V{\'\i}ctor Hugo Zaracho and Leonardo Dionel Aguiar and Ariovaldo A. Giaretta} } @article {53068, title = {The acoustic gymnastics of the dwarf dog-faced bat (Molossops temminckii) in environments with different degrees of clutter}, journal = {Journal of Mammalogy}, volume = {99}, year = {2018}, month = {Nov-29-2018}, pages = {965 - 973}, abstract = {

Molossops temminckii is the only species of the Molossidae capable of exploring background-cluttered space. We tested the hypothesis that M. temminckii uses the clutter rejection strategy in cluttered environments and determined whether the echolocation calls of this species show large-scale geographic variation. We recorded echolocation calls of 10 individuals of M. temminckii using 4 treatments with different degrees of clutter. We compared individuals recorded in Venezuela with individuals recorded in Brazil to verify geographic variation in calls. In the cluttered environments, M. temminckii emitted short downward frequency-modulated calls with short pulse intervals. In the uncluttered environments, M. temminckii emitted long upward frequency-modulated calls with longer intervals and shorter bandwidth. The decreased pulse duration and interval in cluttered environments support the hypothesis that M. temminckii uses the clutter rejection strategy. Additionally, we found that in Brazil, M. temminckii emits shorter calls with higher minimum frequency compared with bats recorded in Venezuela, indicating large-scale geographic variation, probably because of environmental factors.

}, keywords = {bat echolocation, Brazil, Cerrado, Molossidae, vocal plasticity, vocal repertoire}, issn = {0022-2372}, doi = {10.1093/jmammal/gyy070}, url = {https://academic.oup.com/jmammal/article/99/4/965/5071805}, author = {Oliveira, Thiago F and Ramalho, Daniel F and Mora, Emanuel C and Aguiar, Ludmilla M S} } @article {47331, title = {Contribution to the taxonomy of Gryllus Linnaeus, 1758 in South America: Part I: Redescription of Gryllus argentinus Saussure, 1874 (Orthoptera, Grylloidea, Gryllidae)}, journal = {Entomological Science}, volume = {14}, year = {2011}, month = {Jan-01-2011}, pages = {87 - 93}, abstract = {

The genus Gryllus includes 82 described species that occur in America from Canada to Argentina as well as in several areas of Africa, Europe and Asia. There are 12 species in South America, which were described in the nineteenth century based on a small number of samples and inconsistent characters such as body coloration and external morphology. The aim of this article is to redescribe Gryllus argentinus Saussure, 1874 collected in the urban areas of Pelotas, Cap\ão do Le\ão and Rio Grande, in the state of Rio Grande do Sul, southern Brazil, highlighting phallic sclerites, calling song and body morphometry. We designate the lectotype male, provide a combination of diagnostic characteristics and discuss the taxonomic situation of South American Gryllus species.

}, keywords = {bioacoustics, Brazil, cricket, genitalia, insects, pars stridens}, doi = {10.1111/ens.2011.14.issue-110.1111/j.1479-8298.2010.00412.x}, url = {http://doi.wiley.com/10.1111/ens.2011.14.issue-1}, author = {Luciano de P. Martins and Zefa, Edison} }