Sex and age-class differences in calls of Siberian wapiti Cervus elaphus sibiricus

Volodin, Ilya A.; Sibiryakova, Olga V.; Volodina, Elena V.

doi:10.1016/j.mambio.2015.09.002

Cited by 26 publications

(31 citation statements)

References 51 publications

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“…In contrast, sexual dimorphism of the larynx in polygynous red deer and North American elk, both species with very prominent male acoustic rutting display, is poorly expressed (Frey et al, ; Frey and Riede, ). Male and female vocalizations are similar in fundamental frequency (Volodin et al, ) and hinds are capable of producing call patterns that strongly resemble stag rutting calls (Feighny et al, ; Volodin et al, ). Taken together, the above quoted results demonstrate that sexual selection for male acoustic display during the rut does not obligatorily lead to the evolution of sexually dimorphic vocal organs.…”

Section: Discussionmentioning

confidence: 99%

The postnatal ontogeny of the sexually dimorphic vocal apparatus in goitred gazelles (Gazella subgutturosa)

Efremova

Frey

Volodin

et al. 2016

Journal of Morphology

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This study quantitatively documents the progressive development of sexual dimorphism of the vocal organs along the ontogeny of the goitred gazelle (Gazella subgutturosa). The major, male-specific secondary sexual features, of vocal anatomy in goitred gazelle are an enlarged larynx and a marked laryngeal descent. These features appear to have evolved by sexual selection and may serve as a model for similar events in male humans. Sexual dimorphism of larynx size and larynx position in adult goitred gazelles is more pronounced than in humans, whereas the vocal anatomy of neonate goitred gazelles does not differ between sexes. This study examines the vocal anatomy of 19 (11 male, 8 female) goitred gazelle specimens across three age-classes, that is, neonates, subadults and mature adults. The postnatal ontogenetic development of the vocal organs up to their respective end states takes considerably longer in males than in females. Both sexes share the same features of vocal morphology but differences emerge in the course of ontogeny, ultimately resulting in the pronounced sexual dimorphism of the vocal apparatus in adults. The main differences comprise larynx size, vocal fold length, vocal tract length, and mobility of the larynx. The resilience of the thyrohyoid ligament and the pharynx, including the soft palate, and the length changes during contraction and relaxation of the extrinsic laryngeal muscles play a decisive role in the mobility of the larynx in both sexes but to substantially different degrees in adult females and males. Goitred gazelles are born with an undescended larynx and, therefore, larynx descent has to develop in the course of ontogeny. This might result from a trade-off between natural selection and sexual selection requiring a temporal separation of different laryngeal functions at birth and shortly after from those later in life. J. Morphol. 277:826-844, 2016. © 2016 Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 99%

The postnatal ontogeny of the sexually dimorphic vocal apparatus in goitred gazelles (Gazella subgutturosa)

Efremova

Frey

Volodin

et al. 2016

Journal of Morphology

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“…Whereas in the Iberian red deer, the maximum fundamental frequency of hind oral calls (0.21 kHz) is much lower than in 4‐month‐old calves (0.57 kHz; Volodin et al, ); in the Siberian wapiti, the age‐related differences in the maximum fundamental frequency and duration are lacking (Table ). Moreover, whereas the oral calls of 5–6 months adolescents became nearly two times longer compared to the neonates recorded on the same farm during the calving season of the same year (from the mean 0.29–0.47 s), their maximum fundamental frequency remained similar (from 1.56 kHz to 1.45 kHz; Volodin et al, ). The lack of variation in maximum fundamental frequency is important, as this variable is most resistant against degradation in the environment among other frequency variables, encoding individual identity (Maciej, Fischer, & Hammerschmidt, ; Matrosova et al, ).…”

Section: Discussionmentioning

confidence: 94%

“…The f0 contour was extracted using a cross‐correlation algorithm (to Pitch (cc) command in Praat). The time steps in the analysis were 0.005 s for adolescents and 0.01 s for hinds; the lower and upper limits of the f0 range were 100–2000 Hz (following Volodin et al, ). A preliminary visual analysis of the spectrograms in Avisoft showed that the lower limit was lower than the minimum f0 for calls of either hinds or adolescents.…”

Section: Methodsmentioning

confidence: 99%

“…Siberian wapiti are hiders within about 2 weeks after births; from 2 weeks to 3 months of age, they are opportunistic followers and from 3 months onwards permanently follow their mothers (Fedosenko, ; own unpublished observations). Hinds and calves produce contact calls in calm situations, probably for supporting mother‐offspring contact; these calls can be heard by humans from a distance of up to 100 m (Fedosenko, ; Volodin et al, ). Hinds drive away and bite yearlings and adults that approach their hider young, but they never seem to defend them against people in the wild (Fedosenko, ) or in enclosures (our unpublished observations) as do, for example, the white‐tailed or mule deer Odocoileus hemionis (Lingle, Rendall, & Pellis, ; Lingle, Rendall, Wilson, et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Hinds drive away and bite yearlings and adults that approach their hider young, but they never seem to defend them against people in the wild (Fedosenko, ) or in enclosures (our unpublished observations) as do, for example, the white‐tailed or mule deer Odocoileus hemionis (Lingle, Rendall, & Pellis, ; Lingle, Rendall, Wilson, et al, ). In enclosures, hinds produce high‐arousal contact and bugle calls when researchers approach their hider young (Volodin et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Advertising individual identity by mother and adolescent contact calls in Siberian wapiti Cervus elaphus sibiricus

Sibiryakova

Volodin

Volodina³

2018

Ethology

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Individualistic contact calls facilitate mother‐offspring reunion after separation. However, in many mammals, both the acoustic structure and individuality of contact calls differ between mother and young. In contrast, in Siberian wapiti Cervus elaphus sibiricus, contact calls are similar in the acoustics between mother and young, whereas effects of this similarity on vocal individuality were not investigated. In this study, we analyzed acoustic differences between closed‐mouth (nasal) and open‐mouth (oral) contact calls and examined individuality of the most usual oral calls of 19 Siberian wapiti (9 hinds and 10 5–6‐month adolescents) emitted in response to mother‐offspring separation. In the oral calls, the values of frequency and power variables were higher than in the nasal calls. Calls of hinds and adolescents did not differ by the maximum fundamental frequency and duration, whereas the peak frequency was higher in the young. Discriminant function analysis (DFA) based on 11 acoustic variables of oral calls accurately classified to individual 92.5% of hind calls and 96.9% of adolescent calls (chi‐square test for differences between hinds and adolescents, p = 0.19). Variables mainly contributing to vocal identity (duration, start, and maximum fundamental frequency) were the same in calls of mothers and adolescents. We conclude that similarities in the acoustics calls of mothers and adolescents mean that they do not differ in their potential for encoding individual identity, suggesting a mutual process of mother‐offspring vocal recognition in Siberian wapiti.

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Flawed mothering or infant signaling? The effects of deficient acoustic cues on ovine maternal response

Morton

Hinch

Small

et al. 2018

Developmental Psychobiology

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The neonate distress cry, which displays a similar acoustic structure across a range of mammalian species, is highly effective in attracting, even compelling, parental care. However, if this cry is defective, as found in human and rodent neonates with poor neurobehavioral function, is the signal less enticing? Using playback recordings of a ewe's own co-twins as stimuli in a two choice test, we compared the preference of each sheep dam for acoustic features of lamb distress calls to assess the impact of signal quality on maternal response. The results of this study indicate that lamb vocalizations with acoustic parameters reflecting poor vocal fold engagement and arousal were less likely to be preferred by their dam. Additionally, these calls were associated with delayed vocal initiation and poor infant survival behavior suggestive of subtle cognitive deficit; and support the possibility that, as in deer and rodents, ovine vocalizations within a specific fundamental frequency range may well be a trigger for optimal maternal behavior. This research has important implications for understanding failed maternal-young interactions in ungulate and other species, and for verifying standardization of infant stimuli used in maternal behavior studies.

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Sex and age-class differences in calls of Siberian wapiti Cervus elaphus sibiricus

Cited by 26 publications

References 51 publications

The postnatal ontogeny of the sexually dimorphic vocal apparatus in goitred gazelles (Gazella subgutturosa)

The postnatal ontogeny of the sexually dimorphic vocal apparatus in goitred gazelles (Gazella subgutturosa)

Advertising individual identity by mother and adolescent contact calls in Siberian wapiti Cervus elaphus sibiricus

Flawed mothering or infant signaling? The effects of deficient acoustic cues on ovine maternal response

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