Giant pandas attend to androgen-related variation in male bleats

Charlton, Benjamin D.; Swaisgood, Ronald R.; Zhang, Zhihe; Snyder, Rebecca J.

doi:10.1007/s00265-012-1345-0

Cited by 22 publications

(11 citation statements)

References 43 publications

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“…humans [ 10 , 18 ]), a trait that can impact females’ preference (e.g. giant pandas [ 19 ]). Frequency parameters predict reproduction success of the few species investigated (humans [ 20 , 21 ], red deer [ 22 ], fallow deer [ 23 ]).…”

Section: Introductionmentioning

confidence: 99%

Mares Prefer the Voices of Highly Fertile Stallions

et al. 2015

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We investigated the possibility that stallion whinnies, known to encode caller size, also encoded information about caller arousal and fertility, and the reactions of mares in relation to type of voice. Voice acoustic features are correlated with arousal and reproduction success, the lower-pitched the stallion’s voice, the slower his heart beat and the higher his fertility. Females from three study groups preferred playbacks of low-pitched voices. Hence, females are attracted by frequencies encoding for large male size, calmness and high fertility. More work is needed to explore the relative importance of morpho-physiological features. Assortative mating may be involved as large females preferred voices of larger stallions. Our study contributes to basic and applied ongoing research on mammal reproduction, and questions the mechanisms used by females to detect males’ fertility.

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Section: Introductionmentioning

confidence: 99%

Mares Prefer the Voices of Highly Fertile Stallions

et al. 2015

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“…There is growing evidence that indexical information originating from biomechanical constraints operating on signal production plays an important role in animal vocal communication (Fitch and Hauser 2002, Reby and McComb 2003, Taylor and Reby 2010, Charlton et al 2011). For example, the acoustic structure of vocalizations conveys information about caller traits such as body size (birds: Appleby and Redpath 1997, anurans: Bee et al 1999, mammals: Charlton et al 2009), hormonal status (Beani et al 1995, Charlton et al 2012) or age (Ballintijn and ten Cate 1997). In order to evaluate the origins and function of such indexical information, it is crucial to consider how vocal signals are produced.…”

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confidence: 99%

Anatomical bases of sex‐ and size‐related acoustic variation in herring gull alarm calls

Hardouin¹,

Thompson²,

Stenning³

et al. 2013

Journal of Avian Biology

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Hardouin, Loïc A, Thompson, Richard, Stenning, Martyn and Reby, David (2014) Anatomical bases of sex-and size-related acoustic variation in herring gull alarm calls. Journal Of Avian Biology, 45 (2). pp. [157][158][159][160][161][162][163][164][165][166] This version is available from Sussex Research Online: http://sro.sussex.ac.uk/50507/ This document is made available in accordance with publisher policies and may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the URL above for details on accessing the published version. Copyright and reuse:Sussex Research Online is a digital repository of the research output of the University.Copyright and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable, the material made available in SRO has been checked for eligibility before being made available.Copies of full text items generally can be reproduced, displayed or performed and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. h e hypothesis that anatomical or physiological factors can constrain the production of vocalizations is supported by an increasing number of examples from a range of taxa, where acoustic variation is related to sex, body-size or condition. In this study, we combine anatomical and acoustic investigations in herring gulls Larus argentatus to 1) identify co-variation between sex, body size and the dimensions of the vocal apparatus and 2) test the possible eff ect of this co-variation on interindividual variation in the acoustics of alarm calls. We found that the vocal apparatus was sexually dimorphic, with males having longer trachea and bigger vibratile membranes than females. We also identifi ed a relationship between the head -bill length -a secondary sexual trait -and the length of the trachea in males only. However, we failed to identify corresponding sex-and body-size related variation in the acoustic components of alarm calls. We suggest that this absence of a relationship between anatomical and acoustic dimensions may refl ect the lack of biomechanical constraints exerted during the production of alarm calls, and that such relationships are more likely to be expressed in this species ' sexual calls, whose production is characterised by more pronounced, ritualised postures that are more likely to highlight inter-individual size variation.

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“…The vocal repertoire of adult giant pandas ranges from intensity-graded agonistic vocalizations (Nie et al, 2012) to information-rich affiliative vocalizations (Kleiman and Peters, 1990). For example, characteristics of female chirps vary according to female reproductive stage (Charlton et al, 2010a), and characteristics of bleats contain information about male androgen levels and size (Charlton et al, 2011(Charlton et al, , 2012(Charlton et al, , 2009b, female age (Charlton et al, 2009b) and the identity of male and female callers (Charlton et al, 2009a,c). Male copulation calls convey information regarding mating success (Keating, 2011).…”

Section: Introductionmentioning

confidence: 99%

Hearing sensitivity in context: Conservation implications for a highly vocal endangered species

Owen

Keating

Denes

et al. 2016

Global Ecology and Conservation

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a b s t r a c tHearing sensitivity is a fundamental determinant of a species' vulnerability to anthropogenic noise, however little is known about the hearing capacities of most conservation dependent species. When audiometric data are integrated with other aspects of species' acoustic ecology, life history, and characteristic habitat topography and soundscape, predictions can be made regarding probable vulnerability to the negative impacts of different types of anthropogenic noise. Here we used an adaptive psychoacoustic technique to measure hearing thresholds in the endangered giant panda; a species that uses acoustic communication to coordinate reproduction. Our results suggest that giant pandas have functional hearing into the ultrasonic range, with good sensitivity between 10.0 and 16.0 kHz, and best sensitivity measured at 12.5-14.0 kHz. We estimated the lower and upper limits of functional hearing as 0.10 and 70.0 kHz respectively. While these results suggest that panda hearing is similar to that of some other terrestrial carnivores, panda hearing thresholds above 14.0 kHz were significantly lower (i.e., more sensitive) than those of the polar bear, the only other bear species for which data are available. We discuss the implications of this divergence, as well as the relationship between hearing sensitivity and the spectral parameters of panda vocalizations. We suggest that these data, placed in context, can be used towards the development of a sensory-based model of noise disturbance for the species.

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Giant pandas attend to androgen-related variation in male bleats

Cited by 22 publications

References 43 publications

Mares Prefer the Voices of Highly Fertile Stallions

Mares Prefer the Voices of Highly Fertile Stallions

Anatomical bases of sex‐ and size‐related acoustic variation in herring gull alarm calls

Hearing sensitivity in context: Conservation implications for a highly vocal endangered species

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