Developmental changes of nasal and oral calls in the goitred gazelle <Emphasis Type="Italic">Gazella subgutturosa</Emphasis>, a nonhuman mammal with a sexually dimorphic and descended larynx |
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Authors: | Kseniya O Efremova Ilya A Volodin Elena V Volodina Roland Frey Ekaterina N Lapshina Natalia V Soldatova |
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Institution: | (1) Department of Vertebrate Zoology, Faculty of Biology, Lomonosov Moscow State University, Vorobievy Gory, 12/1, Moscow, 119991, Russia;(2) Scientific Research Department, Moscow Zoo, B. Gruzinskaya, 1, Moscow, 123242, Russia;(3) Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke Str., 17, Berlin, 10315, Germany;(4) Ecocenter “Djeiran”, Bukhara, Republic of Uzbekistan |
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Abstract: | In goitred gazelles (Gazella subgutturosa), sexual dimorphism of larynx size and position is reminiscent of the case in humans, suggesting shared features of vocal
ontogenesis in both species. This study investigates the ontogeny of nasal and oral calls in 23 (10 male and 13 female) individually
identified goitred gazelles from shortly after birth up to adolescence. The fundamental frequency (f0) and formants were measured
as the acoustic correlates of the developing sexual dimorphism. Settings for LPC analysis of formants were based on anatomical
dissections of 5 specimens. Along ontogenesis, compared to females, male f0 was consistently lower both in oral and nasal
calls and male formants were lower in oral calls, whereas the first two formants of nasal calls did not differ between sexes.
In goitred gazelles, significant sex differences in f0 and formants appeared as early as the second week of life, while in
humans they emerge only before puberty. This result suggests different pathways of vocal ontogenesis in the goitred gazelles
and in humans. |
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