02029nas a2200169 4500008004100000245011900041210006900160520135600229653001501585653002701600653001401627653001601641653001701657100003301674700003701707856011501744 2021 eng d00aThe Acoustic behavior of the Brazilian Caatinga big rodent is incongruent to its actual position in Hidrochaerinae0 aAcoustic behavior of the Brazilian Caatinga big rodent is incong3 a

Our knowledge about the acoustic behavior of Caviinae species drove us to investigate Kerodon rupestris’s (Caviidae: Hydrochoerinae) repertoire. This species is endemic to Caatinga and states as vulnerable in the Brazilian list of endangered species. We recorded sounds uttered by individuals from Santa Luzia, State of Paraíba, Brazil. We promoted interactions among 13 animals during intra and intersexual pairing sessions, under undisturbed interactions in captivity, and in free-living conditions. We found a repertoire of 13 call types, most of them (all except three) shared with Cavia and only five possibly shared also with Hydrochoerus: (1) Close contact and cohesion: tonal and noisy contact calls, tweet, slow-whistle; (2) Social regulation (incitement, subordination or auto-defense): whine, peep-squeak, yelp; (3) Offensive aggression and status display: roar, snort, and teeth-chattering (4) Warning or intimidation: alarm-whistle, drrr, and drumming; (5) Courtship: purr and slow-whistle. The similarity of Kerodon signals to Hydrochoerinae species, despite the ecological differences, needs to be understood in comparative phylogenetic studies tracing back the origin of the courtship display in Caviidae. Thus, future research should focus on playback studies to test signals' biological function hypothesis.

10aalarm call10aHystricognathi rodents10asemi-arid10asocial life10avocalization1 aAlencar-Jr, Raimundo, Novaes1 aMonticellia, Patrícia, Ferreira uhttps://bio.acousti.ca/content/acoustic-behavior-brazilian-caatinga-big-rodent-incongruent-its-actual-position01876nas a2200205 4500008004100000022001300041245008800054210006900142260001600211520104000227653001401267653002601281653001901307653001801326653002001344653001701364100002001381700003601401856023301437 2018 eng d a0376635700aEvidence of individual discrimination in the maned wolf long-distance extended-bark0 aEvidence of individual discrimination in the maned wolf longdist cJan-12-20183 a

The acoustic channel is an efficient long-distance signalling system that may be especially effective for animals moving in the dark in a vast home range. The maned wolf’s extended-bark is a long-range vocalization that functions as a mechanism to increase spatial distance among conspecifics as well as to enable pair-mate reunion. Individual variations in this vocalization have been reported, but the possibility that they can be perceived and used by the species has never been tested. In our study, we used ABAB playback experiments to test if captive maned wolves could perceive individual variations. We ran 19 playback sessions with ten different subjects from six different zoos. After discarding nine sessions that did not fulfil minimal experimental conditions, in all except two of the ten valid trials, the subjects responded with displaying Oriented Attention. To our knowledge, this is the first demonstration that the maned wolf is capable of discriminating among extended-barks of different individuals.

10aacoustics10aChrysocyon brachyurus10adiscrimination10aindividuality10apsychoacoustics10avocalization1 aFlora, Balieiro1 aPatrícia, Ferreira, Monticelli uhttps://linkinghub.elsevier.com/retrieve/pii/S0376635718301906https://api.elsevier.com/content/article/PII:S0376635718301906?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0376635718301906?httpAccept=text/plain02371nas a2200241 4500008004100000022001300041245005800054210005800112260001600170520149800186653002101684653002101705653001801726653002401744653002701768653001901795100001801814700001501832700001601847700001501863700001801878856023301896 2018 eng d a0376635700aComponents of variation in female common cuckoo calls0 aComponents of variation in female common cuckoo calls cJan-10-20183 a

Investigations on bird vocalizations have largely focused on males. Female vocalizations are widespread in birds but few studies have investigated female vocal characteristics, particularly in non-Passeriformes. In this study, we use new field recordings from China, and calls available from an online sound library to examine temporal patterns, call consistency and geographical variation in vocalizations of female common cuckoos Cuculus canorous. The peak in vocal activity (both male and female) was in the morning, which contrasts to what would be predicted if the sole function of the female call was to distract the attention of hosts after parasitizing a host’s nest in the afternoon. Both male and female common cuckoos were more vocally active in sunny weather, than rainy weather. We also found larger intra-individual variation in female rather than in male calls, which may benefit female cuckoos by increasing stimulation to host species. Peak frequency of female calls decreased with increased latitude, while differences in female call features were not associated with geographic distance. In summary, our findings that female calls are used in the morning, rather than at peak egg laying, yet are highly variable and show little geographic patterns suggest that the function of these female calls may be more variable and intricate than previously thought. However, because research on female vocalizations is underrepresented, future studies are still needed.

10aacoustic signals10acall consistency10acommon cuckoo10afemale vocalization10ageographical variation10avocal activity1 aDeng, Zhuqing1 aLloyd, Huw1 aXia, Canwei1 aLiang, Wei1 aZhang, Yanyun uhttps://linkinghub.elsevier.com/retrieve/pii/S0376635718302997https://api.elsevier.com/content/article/PII:S0376635718302997?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0376635718302997?httpAccept=text/plain02625nas a2200205 4500008004100000022001300041245006400054210006400118260001600182300001400198490000800212520182300220653002302043653002302066653002402089653002202113100002702135700002402162856023302186 2018 eng d a0376635700aSing softly to evoke a response only from a recent intruder0 aSing softly to evoke a response only from a recent intruder cJan-12-2018 a244 - 2490 v1573 a

Low-amplitude soft songs have been described in many birds, but in most species, research has addressed only broadcast songs. Soft songs may have a similar or distinctive structure in comparison to broadcast songs produced in order to defend a territory and attract females. In some species, such soft songs were found to be produced in an aggressive context and were the best predictors of conflict escalation and later physical attack. However, such observations are not consistent across all species studied. Several hypotheses have been put forward to explain the function(s) of soft songs and why they are so quiet. Studies on the ortolan bunting (Emberiza hortulana) show that males produce soft songs similar in structure to broadcast songs during close interactions with conspecific intruders. However, experiments with the playback of loud and soft songs as well as taxidermic mount presentation revealed that soft song in this species does not fulfil aggressive signal criteria. Here we performed an experiment with two loudspeakers simulating movements of the intruder in order to test whether the soft songs are used to evoking a response from a nearby but not localised rival. We found that males responded with similar strength to songs played back from single and double speaker systems. Simultaneously, males produced more soft songs during and just after the phase of the experiment in which we simulated short flights of the intruder. Our results indicate that soft songs might be used during close interactions with rivals without being an aggressive signal and are used as short-range signals to check if the rival is still around. Our results also provide an alternative explanation of soft song behaviour in comparison to the hypotheses of eavesdropping avoidance and readiness to fight.

10aAggressive signals10aEmberiza hortulana10aplayback experiment10aTerritory defence1 aJakubowska, Aleksandra1 aOsiejuk, Tomasz, S. uhttps://linkinghub.elsevier.com/retrieve/pii/S0376635718301335https://api.elsevier.com/content/article/PII:S0376635718301335?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0376635718301335?httpAccept=text/plain00562nas a2200157 4500008004100000022001300041245008800054210006900142260001600211100002300227700002400250700002000274700002400294700002000318856006600338 2017 eng d a0376635700aWhy do caterpillars whistle at birds? Insect defence sounds startle avian predators0 aWhy do caterpillars whistle at birds Insect defence sounds start cJan-02-20171 aDookie, Amanda, L.1 aYoung, Courtney, A.1 aLamothe, Gilles1 aSchoenle, Laura, A.1 aYack, Jayne, E. uhttp://linkinghub.elsevier.com/retrieve/pii/S0376635716303655