{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:11:17Z","timestamp":1790640677647,"version":"4.1.0"},"reference-count":85,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2019,11,28]],"date-time":"2019-11-28T00:00:00Z","timestamp":1574899200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Anatomy"],"published-print":{"date-parts":[[2020,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A retractable larynx and adaptations of the vocal folds in the males of several polygynous ruminants serve for the production of rutting calls that acoustically announce larger than actual body size to both rival males and potential female mates. Here, such features of the vocal tract and of the sound source are documented in another species. We investigated the vocal anatomy and laryngeal mobility including its acoustical effects during the rutting vocal display of free\u2010ranging male impala (<jats:italic>Aepyceros melampus melampus<\/jats:italic>) in Namibia. Male impala produced bouts of rutting calls (consisting of oral roars and interspersed explosive nasal snorts) in a low\u2010stretch posture while guarding a rutting territory or harem. For the duration of the roars, male impala retracted the larynx from its high resting position to a low mid\u2010neck position involving an extensible pharynx and a resilient connection between the hyoid apparatus and the larynx. Maximal larynx retraction was 108\u00a0mm based on estimates in video single frames. This was in good concordance with 91\u2010mm vocal tract elongation calculated on the basis of differences in formant dispersion between roar portions produced with the larynx still ascended and those produced with maximally retracted larynx. Judged by their morphological traits, the larynx\u2010retracting muscles of male impala are homologous to those of other larynx\u2010retracting ruminants. In contrast, the large and massive vocal keels are evolutionary novelties arising by fusion and linear arrangement of the arytenoid cartilage and the canonical vocal fold. These bulky and histologically complex vocal keels produced a low fundamental frequency of 50\u00a0Hz. Impala is another ruminant species in which the males are capable of larynx retraction. In addition, male impala vocal folds are spectacularly specialized compared with domestic bovids, allowing the production of impressive, low\u2010frequency roaring vocalizations as a significant part of their rutting behaviour. Our study expands knowledge on the evolutionary variation of vocal fold morphology in mammals, suggesting that the structure of the mammalian sound source is not always human\u2010like and should be considered in acoustic analysis and modelling.<\/jats:p>","DOI":"10.1111\/joa.13114","type":"journal-article","created":{"date-parts":[[2019,11,28]],"date-time":"2019-11-28T08:02:37Z","timestamp":1574928157000},"page":"398-424","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Savannah roars: The vocal anatomy and the impressive rutting calls of male impala (<i>Aepyceros melampus<\/i>) \u2013 highlighting the acoustic correlates of a mobile larynx"],"prefix":"10.1111","volume":"236","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6759-761X","authenticated-orcid":false,"given":"Roland","family":"Frey","sequence":"first","affiliation":[{"name":"Department of Reproduction Management Leibniz Institute for Zoo and Wildlife Research Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6278-0354","authenticated-orcid":false,"given":"Ilya A.","family":"Volodin","sequence":"additional","affiliation":[{"name":"Faculty of Biology Department of Vertebrate Zoology Lomonosov Moscow State University Moscow Russia"},{"name":"Scientific Research Department Moscow Zoo Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9755-4576","authenticated-orcid":false,"given":"Elena V.","family":"Volodina","sequence":"additional","affiliation":[{"name":"Scientific Research Department Moscow Zoo Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kseniya O.","family":"Efremova","sequence":"additional","affiliation":[{"name":"Pirogov Russian National Research Medical University Moscow Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vera","family":"Menges","sequence":"additional","affiliation":[{"name":"Department of Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0686-0701","authenticated-orcid":false,"given":"Ruben","family":"Portas","sequence":"additional","affiliation":[{"name":"Department of Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3490-1515","authenticated-orcid":false,"given":"J\u00f6rg","family":"Melzheimer","sequence":"additional","affiliation":[{"name":"Department of Evolutionary Ecology Leibniz Institute for Zoo and Wildlife Research Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guido","family":"Fritsch","sequence":"additional","affiliation":[{"name":"Department of Reproduction Management Leibniz Institute for Zoo and Wildlife Research Berlin Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina","family":"Gerlach","sequence":"additional","affiliation":[{"name":"Hannover Zoo Hannover Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katja","family":"von D\u00f6rnberg","sequence":"additional","affiliation":[{"name":"Hannover Zoo Hannover Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2019,11,28]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1093\/beheco\/3.1.25"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ympev.2013.02.015"},{"issue":"3","key":"e_1_2_7_4_1","first-page":"51","article-title":"Praat: doing phonetics by computer","volume":"5","author":"Boersma P","year":"2013","journal-title":"Version"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1186\/1741-7007-8-35"},{"key":"e_1_2_7_6_1","volume-title":"Cytologie, Histologie und mikroskopische Anatomie des Menschen","author":"Bucher O","year":"1997"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsbl.2007.0244"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1121\/1.2896758"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0020329"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1242\/jeb.061358"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.anbehav.2012.09.034"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cub.2013.10.069"},{"key":"e_1_2_7_13_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0070279"},{"key":"e_1_2_7_14_1","unstructured":"ChildG(1965)Behaviour of large mammals during the formation of Lake Kariba. 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