Abstract
We analyzed the vocal structure of ewes and lambs in summer pasture of arushantu and buruto, Mongolia. Regarding the ewes, in the time between vocalization types/ηηηη/and/ηaee/, /ηaee/and/ηnaeee/, significant differences were noted in the fundamental frequencies and sound pressure between vocalization types/ηηηη/and/ηaee/, /ηηηη/and/ηnaeee/ (P< 0.05).Regarding the lambs, in the time between vocalization types/ηηηη/and/ηeee/, /ηeee/ and/ηneeee/, significant differences were noted in the in the fundamental frequencies and sound pressure between vocalization types/ηηηη/and/ηeee/ (P< 0.05).There were also significant differences in the end of vocalization of phonation time between different vocalization types (χ2=10.8, P< 0.05).With both ewes and lambs showing variations in phonation time, fundamental frequencies, and sound pressure-depending on phonetic notation-this suggests that sheep use dif-ferent sounds based on the circumstances of vocalization and behavior.
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