Postnatal Consequences of Prenatal Sound Stimulation in the Sheep

Reader, M.; Vince, Margaret A.; Armitage, Sally E.; Walser, Elisabeth Shillito

doi:10.1163/156853982x00111

Cited by 19 publications

(9 citation statements)

References 4 publications

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“…Our results may suggest that this is already the case at 12 hr for mothers and at 24 hr for lambs. In addition, in the case of lambs it cannot be excluded that familiarization starts even before birth in a way similar to that reported for other sounds (Vince, Armitage, Shillito Walser, & Reader, 1982;Vince, Lynch, Mottershead, Green, & Elwin, 1985). But even if learning takes place only postnatally, the presence of high-and low-pitched bleats, and of intermediate bleats, provides a sufficient basis for the development of individual recognition.…”

Section: Possible Mechanisms Involved In the Display Of Early Mutual mentioning

confidence: 87%

Establishment of vocal communication and discrimination between ewes and their lamb in the first two days after parturition

Sèbe¹,

Nowak²,

Poindron³

et al. 2007

Developmental Psychobiology

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In sheep, the mother-young relationship is characterized by an exclusive bond that relies on the rapid establishment of mutual recognition. However, the role of acoustic cues has been underestimated and neglected in this early discrimination. Therefore, the aim of the present study was (1) to characterize the vocal behavior of ewes and their lambs during the first 15 days postpartum and (2) to investigate the ability of newborn lambs and their mothers to discriminate each other from alien subjects within the first 48 hr postpartum on the basis of acoustic cues only. Ewes started to vocalize in the last 3 hr preceding parturition, emitting mainly high-pitched bleats. However, the bleating activity was highest during the first 3 hr following birth, consisting mainly of low-pitched bleats. Thereafter it decreased sharply until 24 hr postpartum, with most of the activity coming from the mother. In a two-choice test, ewes discriminated their own from an alien lamb on the basis of acoustic cues only at 24 hr postpartum, while lambs did so for their mother at 48 hr, which in both cases was much earlier than reported so far. We conclude that early vocal recognition between the ewe and her lamb may play an important role for the maintenance of mother-young contact. ß 2007 Wiley Periodicals, Inc. Dev Psychobiol 49: 375-386, 2007.

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Section: Possible Mechanisms Involved In the Display Of Early Mutual mentioning

confidence: 87%

Establishment of vocal communication and discrimination between ewes and their lamb in the first two days after parturition

Sèbe¹,

Nowak²,

Poindron³

et al. 2007

Developmental Psychobiology

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“…More recently, however, researchers have challenged this view. First, studies of sensory features of the intrauterine world have shown that fetuses are exquisitely sensitive to stimuli that are present in utero, including those that are available to the chemical and acoustic modalities (Fifer & Moon, 1988;Pederson & Blass, 1982;Vince, Armitage, Shillito-Walser, & Reader, 1982), as well as those sensed by vestibular and proprioceptive receptors (Bradley & Mistretta, 1975;.…”

Section: Introductionmentioning

confidence: 99%

Proximal control of fetal rat behavior

Ronca

Kamm

Thelen

et al. 1994

Developmental Psychobiology

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We examined the influence of the amniotic sac on spontaneous movement in late gestation fetal rats. Using techniques for in vivo observation of fetal behavior, Day 21 rat fetuses were exteriorized from the uterus, with umbilical connections to the dam intact, and videotaped for 15 min either: (a) through the intact amniotic membranes, or (b) following removal of the membranes. Analysis of fetal behavior categories replicated the findings of previous investigators: Movements of the head, forelimbs, and rearlimbs were significantly increased by sac removal, as was the total frequency of behavior categories and the simultaneous occurrence of different behavior categories. Frame-by-frame analysis of videotaped behavior revealed that amniotic sac removal increased the frequency of movement bouts without altering the overall amount of time that fetuses spent moving. Movement bout durations ranged from 50 msec to 70 s. The average duration of movement bouts was significantly reduced for fetuses lacking the amniotic sac as compared to fetuses within the sac, as was the overall distribution of movement bout durations. Frequency distributions of movement bout durations and interbout interval (IBIs) revealed that sac removal significantly increased the occurrence of short (1-2 s) movement bouts and reduced the frequency of protracted movement bouts and interbout intervals (> 10-s duration). Taken together, these findings indicate that the quantitative dimensions of fetal rat movements are influenced by proximal features of the uterine environment. During prenatal life, the amniotic sac appears to sustain movement, possibly by providing proprioceptive feedback or physical support to the fetus, or by regulating the chemical milieu.

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“…Interestingly, however, early acoustic discrimination is not a human-specific ability, for it is also observed in a wide variety of other animals like guinea pigs (Vince, 1979), sheep (Vince et al, 1982) or chinchillas , and discrimination of languages of different prosodic types is also mastered by different species like cotton-top tamarins (cf. Ramus et al, 2000), or rats (cf.…”

Section: Early Phonological Abilities In Human Infantsmentioning

confidence: 99%