A comparative analysis of the acoustic structure of separation calls of Mongolian wild horses (Equus ferus przewalskii) and domestic horses (Equus caballus)

Alberghina, Daniela; Caudullo, Eugenia; Bandi, Namkhai; Panzera, Michele

doi:10.1016/j.jveb.2014.04.008

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…Similarly to the closely related domestic horse, it produces three main types of calls: squeals, nickers and whinnies 28 – 31 . First analyses of this species’ calls seem to suggest that Przewalski’s stallions’ separation calls tend to be shorter than those produced by domestic stallions, while Przewalski’s mares’ separation calls show a lower frequency than those produced by domestic mares 28 , 29 . However, these two studies only focused on nickers and squeals and on a limited sample size and number of acoustic parameters.…”

Section: Introductionmentioning

confidence: 99%

Vocal expression of emotional valence in Przewalski’s horses (Equus przewalskii)

Maigrot

Hillmann

Anne

et al. 2017

Sci Rep

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Vocal expression of emotions has been suggested to be conserved throughout evolution. However, since vocal indicators of emotions have never been compared between closely related species using similar methods, it remains unclear whether this is the case. Here, we investigated vocal indicators of emotional valence (negative versus positive) in Przewalski’s horses, in order to find out if expression of valence is similar between species and notably among Equidae through a comparison with previous results obtained in domestic horse whinnies. We observed Przewalski’s horses in naturally occurring contexts characterised by positive or negative valence. As emotional arousal (bodily activation) can act as a confounding factor in the search for indicators of valence, we controlled for its effect on vocal parameters using a behavioural indicator (movement). We found that positive and negative situations were associated with specific types of calls. Additionally, the acoustic structure of calls differed according to the valence. There were some similarities but also striking differences in expression of valence between Przewalski’s and domestic horses, suggesting that vocal expression of emotional valence, unlike emotional arousal, could be species specific rather than conserved throughout evolution.

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Section: Introductionmentioning

confidence: 99%

Vocal expression of emotional valence in Przewalski’s horses (Equus przewalskii)

Maigrot

Hillmann

Anne

et al. 2017

Sci Rep

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“…birds : Hamilton, 1962;Marler, 2004). However, several studies on terrestrial mammals reported the production of separation calls (Alberghina et al, 2014;Mumm et al, 2014).…”

Section: Acoustic Potential For Group Relocationmentioning

confidence: 99%

Diving apart together: call propagation in diving long-finned pilot whales

Kok

Kolfshoten

Campbell

et al. 2020

Journal of Experimental Biology

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Group-living animals must communicate to stay in contact. In long-finned pilot whales, there is a trade-off between the benefits of foraging individually at depth and the formation of tight social groups at the surface. Using theoretical modelling and empirical data of tagged pairs within a group, we examined the potential of pilot whale social calls to reach dispersed group-members during foraging periods. Both theoretical predictions and empirical data of tag pairs showed a potential for communication between diving and non-diving group members over separation distances up to at least 385 m (empirical) and 1800 m (theoretical). These distances are at or exceeding pilot whale dive depths recorded across populations. Call characteristics and environmental characteristics were analysed to investigate determinants of call detectability. Longer calls with a higher sound pressure level (SPL) that were received in a quieter environment were more often detected than their shorter, lower SPL counterparts within a noisier environment. In a noisier environment, calls were louder and had a lower peak frequency, indicating mechanisms for coping with varying conditions. However, the vulnerability of pilot whales to anthropogenic noise is still of concern as the ability to cope with increasing background noise may be limited. Our study shows that combining propagation modelling and actual tag recordings provides new insights into the communicative potential for social calls in orientation and reunion with group members for deep-diving pilot whales.

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Equine Communicative Behavior

Beaver¹

2019

Equine Behavioral Medicine

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A comparative analysis of the acoustic structure of separation calls of Mongolian wild horses (Equus ferus przewalskii) and domestic horses (Equus caballus)

Cited by 6 publications

References 23 publications

Vocal expression of emotional valence in Przewalski’s horses (Equus przewalskii)

Vocal expression of emotional valence in Przewalski’s horses (Equus przewalskii)

Diving apart together: call propagation in diving long-finned pilot whales

Equine Communicative Behavior

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