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What makes a cry a cry？ A review of infant distress vocalizations

Current Zoology 2012年第5期58卷 698-726页

作者： Susan LINGLE Megan T. WYMAN Radim KOTRBA Lisa J. TEICHROEB Cora A. ROMANOW Department of Biology University of Winnipeg Manitoba R3B 2E9 Canada Department of Population Health and Reproduction School of veterinary Medicine University of California-Davis One Shields Avenue Davis CA 95616 U.S.A. 3 Department of Animal Science and Food Processing in Tropics and Subtropics Czech University of Life Sciences Prague Czech Republic Department of Ethology Institute of Animal Science Prague Czech Republic

In contrast to the cries of human infants, sounds made by non-human infants in different stressful behavioral contexts （hunger or physical discomfort, isolation, capture by humans or predators） are usually treated as distinct types of vocalizations. However, if distress vocalizations produced by different species and in different contexts share a common motivational state and associated neurochemical pathways, we can expect them to share a common acoustic structure and adaptive function, showing only limited variation that corresponds to the infant＇s level of arousal. Based on this premise, we review the acoustic structure and adaptive function of two types of distress calls, those given when infants were isolated from their mothers （isolation caUs） or captured by humans （capture calls）. We conducted a within-context comparison examining the two call types across a diverse se- lection of mammalian species and other vertebrate groups, followed by a comparison of how acoustic structure and function dif- fers between these contexts. In addition, we assessed acoustic traits that are critical to the response of caregivers. Across verte- brate species, distress vocalizations produced in these two behavioral contexts tend to be tonal with a simple chevron, flat or de- scending pattern of frequency modulation. Reports that both isolation and capture calls of vertebrate infants serve to attract care- givers are universal, and the fundamental frequency of infant vocalizations is often critical to this response. The results of our re- view are consistent with the hypothesis that differences in the acoustic structure of isolation and capture distress vocalizations re- flect differences in arousal, and not discrete functions. The similarity in acoustic structure and caregiver response observed across vertebrates adds support to the hypothesis that the production and processing of distress vocalizations are part of a highly-conserved system of social vocal behaviour in vertebrate

关键词： Crying Mother-infant communication Isolation calls distress calls Motivational-structural rules Parental care Phylogeny

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