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  • Title: Involvement of the main but not the accessory olfactory system in maternal behavior of primiparous and multiparous ewes.
    Author: Lévy F, Locatelli A, Piketty V, Tillet Y, Poindron P.
    Journal: Physiol Behav; 1995 Jan; 57(1):97-104. PubMed ID: 7878131.
    Abstract:
    The respective roles of the main and accessory olfactory systems in the development of maternal behavior and selective suckling were investigated in parturient primiparous and multiparous ewes. Vomeronasal nerve section before parturition did not disturb either maternal behavior or maternal selectivity at suckling. By contrast, anosmia induced by zinc sulphate infusion had significant effects on the onset of maternal behavior in primiparous ewes. The onset of licking and of suckling were delayed and licking times and maternal bleats were reduced. Such disturbances were not observed in multiparous anosmic ewes, indicating that experience can compensate for the loss of olfactory information. On the other hand, anosmia prevented selective care regardless of maternal experience. Our results underline the importance of the main olfactory system for the development of adequate maternal behavior in sheep.
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