Acoustic signals of baby black caimans

Vergne, Amélie L.; Aubin, Thierry; Taylor, Peter; Mathevon, Nicolas

doi:10.1016/j.zool.2011.07.003

Cited by 36 publications

(26 citation statements)

References 15 publications

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“…The motherinfant bond is strong in some crocodiles, with the infants staying with the mother after hatching. Research has suggested that specific calls attract the mother's protection and facilitate group cohesion (Vergne et al 2011). Crocodiles and bats are sometimes seen as animals to be feared and our results may reflect this belief.…”

confidence: 56%

Public attitudes towards grief in animals

et al. 2013

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confidence: 56%

Public attitudes towards grief in animals

et al. 2013

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“…Mothers or other caregivers hearing these sounds quickly approach to accompany, retrieve, or feed the newborn (Zeifman 2001;Newman 2004Newman , 2007Lingle et al 2012;Zeskind 2013) or to defend it against predators (Chaiken 1992;Benedict 2007;Lingle et al 2007b). Crying is a primitive behavior in mammals and a behavior that is shared with other vertebrates (Newman 2004;Vergne et al 2007Vergne et al , 2011Lingle et al 2012). Infant rats, cats, and humans cry even when the forebrain is absent or severed from the brainstem (Nielsen and Sedgwick 1949;Barnet et al 1966;Kyuhou and Gemba 1998;Middlemis-Brown et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Deer Mothers Are Sensitive to Infant Distress Vocalizations of Diverse Mammalian Species

Lingle

Riede

2014

The American Naturalist

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Acoustic structure, behavioral context, and caregiver responses to infant distress vocalizations (cries) are similar across mammals, including humans. Are these similarities enough for animals to respond to distress vocalizations of taxonomically and ecologically distant species? We show that mule deer (Odocoileus hemionus) and white-tailed deer (Odocoileus virginianus) mothers approach a speaker playing distress vocalizations of infant marmots (Marmota flaviventris), seals (Neophoca cinerea and Arctocephalus tropicalis), domestic cats (Felis catus), bats (Lasionycteris noctivagans), humans (Homo sapiens), and other mammals if the fundamental frequency (F0) falls or is manipulated to fall within the frequency range in which deer respond to young of their own species. They did not approach to predator sounds or to control sounds having the same F0 but a different structure. Our results suggest that acoustic traits of infant distress vocalizations that are essential for a response by caregivers, and a caregiver's sensitivity to these acoustic traits, may be shared across diverse mammals.

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“…Recent studies have shown that vocal communication plays an important role in crocodilian social ecology 43 . Pre-hatching calls synchronize hatching time and alert mothers to incipient hatching 44 ; juvenile vocalisations grade from contact into distress calls and receivers respond accordingly 45 . In juvenile Nile crocodiles ( Crocodylus niloticus ), the fundamental frequency of distress calls scales with age and adult females differentiate between the calls of larger and smaller juveniles 46 .…”

Section: Introductionmentioning

confidence: 99%

Formants provide honest acoustic cues to body size in American alligators

Reber

Janisch

Torregrosa

et al. 2017

Sci Rep

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In many vertebrates, acoustic cues to body size are encoded in resonance frequencies of the vocal tract (“formants”), rather than in the rate of tissue vibration in the sound source (“pitch”). Anatomical constraints on the vocal tract’s size render formants honest cues to size in many bird and mammal species, but it is not clear whether this correlation evolved convergently in these two clades, or whether it is widespread among amniotes (mammals, birds, and non-avian reptiles). We investigated the potential for honest acoustic cues in the bellows of adult American alligators and found that formant spacing provided highly reliable cues to body size, while presumed correlates of the source signal did not. These findings held true for both sexes and for all bellows whether produced in or out of water. Because birds and crocodilians are the last extant Archosaurians and share common ancestry with all extinct dinosaurs, our findings support the hypothesis that dinosaurs used formants as cues to body size. The description of formants as honest signals in a non-avian reptile combined with previous evidence from birds and mammals strongly suggests that the principle of honest signalling via vocal tract resonances may be a broadly shared trait among amniotes.

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Acoustic signals of baby black caimans

Cited by 36 publications

References 15 publications

Public attitudes towards grief in animals

Public attitudes towards grief in animals

Deer Mothers Are Sensitive to Infant Distress Vocalizations of Diverse Mammalian Species

Formants provide honest acoustic cues to body size in American alligators

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