01958nas a2200169 4500008004100000245011900041210006900160520135600229653001501585653002701600653001401627653001601641653001701657100003301674700003701707856004401744 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/pt-pt/node/5844702083nas a2200217 4500008004100000245009400041210006900135520138800204653002301592653001501615653001101630653001701641653001601658653002001674100002101694700002101715700002401736700002201760700002001782856006301802 2021 eng d00aIndividual-based acoustic variation of the alarm calls in the long-tailed ground squirrel0 aIndividualbased acoustic variation of the alarm calls in the lon3 a

Based on their phylogenetic position, Nearctic ground squirrels are closest relatives to the long-tailed ground squirrel Urocitellus undulates even though it has Palaearctic distribution. We aimed to investigate the variability of alarm calls of the long-tailed ground squirrel to test the individual variation in alarm calls. This species is known to produce two types of alarm calls: whistle alarms and wideband calls. Although ground squirrels are a model group for the study of vocal individuality, this phenomenon has not yet been studied in a species producing two such completely different types of alarms. Most of ground squirrel species produce either whistle or wideband alarms and this species represents a unique model for testing the degree of individual variability depending on completely different acoustic structures. We analysed 269 whistle alarms produced by 13 individuals and 591 wideband alarms from 25 individuals at the western part of Lake Baikal. A discriminant function analysis (DFA) assigned 93.5% (88.9%, cross-validated result) of whistle alarms to the correct individual and 91.4% (84%) of wideband alarms. This is the first evidence of individual variation in wideband alarms compared with whistle alarms and occurrence of vocal individuality in two warning signals of a completely different acoustic structure produced by a ground squirrel.

10aacoustic evolution10aalarm call10arodent10aSpermophilus10aUrocitellus10avocal diversity1 aGoncharov, Denis1 aPolicht, Richard1 aHambálková, Lucie1 aSalovarov, Viktor1 aHart, Vlastimil uhttps://royalsocietypublishing.org/doi/10.1098/rsos.20014702171nas a2200205 4500008004100000245008100041210006900122520153400191653001501725653002101740653003101761653001301792100001801805700001501823700001301838700001501851700001701866700002601883856005601909 2019 eng d00aHeterospecific alarm-call recognition in two warbler hosts of common cuckoos0 aHeterospecific alarmcall recognition in two warbler hosts of com3 a

Species facing similar selection pressures should recognize heterospecific alarm signals. However, no study has so far examined heterospecific alarm-call recognition in response to parasitism by cuckoos. In this study, we tested whether two sympatric host species of the common cuckoo Cuculus canorus, Oriental reed warbler Acrocephalus orientalis (ORW, main host), and black-browed reed warbler Acrocephalus bistrigiceps (BRW, rare host), could recognize each other’s alarm calls in response to cuckoos. Dummies of common cuckoo (parasite) and Eurasian sparrowhawk Accipiter nisus (predator) were used to induce and record alarm calls of the two warbler species, respectively. In the conspecific alarm-call playback experiments, ORW responded more strongly to cuckoo alarm calls than to sparrowhawk alarm calls, while BRW responded less strongly to cuckoo alarm calls than to sparrowhawk alarm calls. In the heterospecific alarm-call playback experiments, both ORW and BRW responded less strongly to cuckoo alarm calls than sparrowhawk alarm calls. BRW seemed to learn the association between parasite-related alarm calls of the ORW and the cuckoo by observing the process of ORW attacking cuckoos. In contrast, alarm calls of BRW to cuckoos were rarely recorded in most cases. BRW with low parasite pressure still developed recognition of heterospecific parasite-related alarm call. Unintended receivers in the same community should recognize heterospecific alarm calls precisely to extract valuable information.

10aalarm call10aBrood parasitism10aHeterospecific recognition10aplayback1 aYu, Jiangping1 aLu, Hailin1 aSun, Wei1 aLiang, Wei1 aWang, Haitao1 aMøller, Anders, Pape uhttp://link.springer.com/10.1007/s10071-019-01307-902566nas a2200229 4500008004100000245021900041210006900260520168300329653001502012653001902027653001702046653002202063653002402085100002402109700002702133700002402160700002202184700002802206700002602234700002202260856005402282 2019 eng d00aPhylogenetic relationship and variation of alarm call traits of populations of red‐cheeked ground squirrels ( Spermophilus erythrogenys sensu lato) suggest taxonomic delineation0 aPhylogenetic relationship and variation of alarm call traits of 3 a

Distribution area and taxonomic borders within the species complex Spermophilus erythrogenys sensu lato remain questionable. Early evidence suggests that red‐cheeked ground squirrels of Southeast Kazakhstan are remarkably different in terms of the acoustic structure of their alarm calls from the red‐cheeked ground squirrels of the Kurgan region in Russia. In this study, we analyzed the differences in the acoustic structure of the alarm call and mitochondrial DNA (complete control region, 1005–1006 bp and complete cytochrome b gene, 1140 bp) in 3 populations of red‐cheeked ground squirrels (Tara, Altyn‐Emel and Balkhash), all located within areas isolated by geographical barriers in Southeast Kazakhstan. We found that the alarm call variables were similar between the 3 study populations and differed by the maximum fundamental frequency (8.46 ± 0.75 kHz) from the values (5.62 ± 0.06 kHz) reported for the red‐cheeked ground squirrels from the Kurgan region of Russia. Variation in mtDNA control region was only 3% and variation in cytochrome b gene was only 2.5%. Phylogenetic trees based on cytochrome b gene polymorphism of 44 individuals from the study area and adjacent territories indicated 3 clades with high (98–100%) bootstrap support: “intermedius,” “brevicauda” and “iliensis”). We conclude that the 3 study populations in Southeast Kazakhstan belong to the clade intermedius and suggest a taxonomical revision of the species complex Spermophilus erythrogenys sensu lato, including analyses of nuclear DNA and alarm calls for populations of the brevicauda and iliensis clades.

10aalarm call10acontrol region10acytochrome b10amitochondrial DNA10avocal communication1 aMatrosova, Vera, A.1 aIVANOVA, Anastasia, D.1 aVolodina, Elena, V.1 aVolodin, Ilya, A.1 aAlexandrov, Dmitry, Yu.1 aSibiryakova, Olga, V.1 aErmakov, Oleg, A. uhttps://onlinelibrary.wiley.com/toc/17494877/14/401847nas a2200253 4500008004100000022001300041245006100054210006100115260001600176300001400192490000800206520094800214653001501162653001201177653003001189653002301219653002801242653001201270653001401282653001701296100002501313700002201338856023301360 2018 eng d a0003347200aWorking hypotheses on the meaning of general alarm calls0 aWorking hypotheses on the meaning of general alarm calls cJan-08-2018 a113 - 1180 v1423 a

General calls are present in the vocal repertoire of a great number of animal species. Because of their lack of context specificity, they are typically argued to possess blurred meaning, or even no meaning at all. Although recent animal cognition studies have demonstrated a growing interest in these vocalizations, there is currently no clear definition of general calls, and their meaning is seldom discussed. Here, we propose a definition of general calls, and review various hypotheses regarding their meaning, focusing on alert contexts. We first discuss the hypothesis that general alarm calls have a general alert meaning. Second, we review an alternative view, that general calls in fact have a specific meaning. With this review, we encourage further research that could help delve into the mechanisms underlying vocal production and comprehension and would improve our understanding of general and specific calls in animals.

10aalarm call10acontext10afunctional referentiality10ageneral alarm call10ainformativity principle10aMeaning10asemantics10avocalization1 aDezecache, Guillaume1 aBerthet, Mélissa uhttps://linkinghub.elsevier.com/retrieve/pii/S0003347218301908https://api.elsevier.com/content/article/PII:S0003347218301908?httpAccept=text/xmlhttps://api.elsevier.com/content/article/PII:S0003347218301908?httpAccept=text/plain