02430nas a2200265 4500008004100000022001400041245012500055210006900180260001600249520154900265653002401814653001101838653001401849653001901863653002501882653003101907100002601938700002401964700002901988700002802017700002702045700001802072700001902090856005502109 2018 eng d a0289-077100aEffects of hydroelectric turbine noise on the behaviour of Leporinus taeniatus (Characiformes: Anostomidae) in captivity0 aEffects of hydroelectric turbine noise on the behaviour of Lepor cOct-11-20193 a

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.

10aanthropogenic noise10aBrazil10aCharacins10aFish behaviour10aHydroelectric impact10aSão Francisco River basin1 aDuarte, Marina, H. L.1 aMelo, Rafael, M. C.1 aScarpelli, Marina, D. A.1 aCarvalho, Thiago, M. A.1 aPadovese, Linilson, R.1 aBazzoli, Nilo1 aRizzo, Elizete uhttp://link.springer.com/10.1007/s10164-018-0568-602418nas a2200253 4500008004100000022001400041245012700055210006900182260001600251300000800267490000900275520156600284653002101850653001301871653001401884653001101898653001901909653002001928653001801948100002601966700002901992700002802021856011502049 2018 eng d a1175-532600aGeographic variation in the advertisement call of Trachycephalus typhonius Anura: Hylidae) based on South American samples0 aGeographic variation in the advertisement call of Trachycephalus cFeb-11-2019 a4040 v45213 a

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 Rondônia (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.

10aAmazon Milk Frog10aAmphibia10aArgentina10aBrazil10acall structure10adifferentiation10avocalizations1 aZaracho, Víctor Hugo1 aAguiar, Leonardo, Dionel1 aGiaretta, Ariovaldo, A. uhttps://biotaxa.org/Zootaxa/issue/view/zootaxa.4521.3https://biotaxa.org/Zootaxa/article/view/zootaxa.4521.3.602011nas a2200253 4500008004100000022001400041245012800055210006900183260001600252300001400268490000700282520121100289653002101500653001101521653001201532653001501544653002101559653002101580100002401601700002301625700002101648700002601669856006201695 2018 eng d a0022-237200aThe acoustic gymnastics of the dwarf dog-faced bat (Molossops temminckii) in environments with different degrees of clutter0 aacoustic gymnastics of the dwarf dogfaced bat Molossops temminck cNov-29-2018 a965 - 9730 v993 a

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.

10abat echolocation10aBrazil10aCerrado10aMolossidae10avocal plasticity10avocal repertoire1 aOliveira, Thiago, F1 aRamalho, Daniel, F1 aMora, Emanuel, C1 aAguiar, Ludmilla, M S uhttps://academic.oup.com/jmammal/article/99/4/965/507180501514nas a2200217 4500008004100000245017200041210006900213260001600282300001200298490000700310520079700317653001701114653001101131653001201142653001401154653001201168653001801180100002801198700001701226856005301243 2011 eng d00aContribution to the taxonomy of Gryllus Linnaeus, 1758 in South America: Part I: Redescription of Gryllus argentinus Saussure, 1874 (Orthoptera, Grylloidea, Gryllidae)0 aContribution to the taxonomy of Gryllus Linnaeus 1758 in South A cJan-01-2011 a87 - 930 v143 a

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, Capão do Leão 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.

10abioacoustics10aBrazil10acricket10agenitalia10ainsects10apars stridens1 aMartins, Luciano, de P.1 aZefa, Edison uhttp://doi.wiley.com/10.1111/ens.2011.14.issue-1