Poindron Pascal, Gilling Gabriella, Hernandez Horacio, Serafin Norma, Terrazas Angélica
Instituto de Neurobiología, Campus UNAM-UAQ Juriquilla Km. 15 Carretera Querétaro-San Luis Potosi, Querétaro 76230, QRO, Mexico.
Dev Psychobiol. 2003 Sep;43(2):82-9. doi: 10.1002/dev.10123.
Mother sheep and goats develop an early bond with their neonate on the basis of olfactory recognition. We investigated whether goats were also able to show early (<24 hr postpartum) nonolfactory discrimination of their kids, as already reported in sheep. In a first experiment, we found that goats are not able to recognize their kid at 1 m away on the basis of olfactory cues alone. By contrast, they showed a significant preference for their own kid in a two-choice test as early as 4 hr postpartum, and prepartum maternal anosmia did not impede the ability of mothers to show discrimination. We conclude that goats, like sheep, are fully able to discriminate their neonate without the help of olfactory cues very early after parturition. The difference in the early spatial mother-young relationship between the two species due to the different behavior of the young (kids = hiders, lambs = followers), is not associated with marked differences in the dynamics or mechanisms controlling the development of recognition of the neonate by its mother.
母羊和母山羊会基于嗅觉识别与它们的新生儿建立早期联系。我们研究了山羊是否也能像已在绵羊中报道的那样,在产后早期(<24小时)对其幼崽进行非嗅觉辨别。在第一个实验中,我们发现山羊仅根据嗅觉线索无法在1米远的距离识别自己的幼崽。相比之下,它们在产后4小时的二选一测试中就对自己的幼崽表现出了显著偏好,并且产前母体嗅觉缺失并未妨碍母亲表现出辨别能力。我们得出结论,山羊和绵羊一样,在分娩后很早就能在没有嗅觉线索的帮助下完全辨别出它们的新生儿。由于幼崽行为不同(山羊幼崽=躲藏者,绵羊幼崽=跟随者),这两个物种在早期空间母婴关系上的差异,与控制母亲对新生儿识别发展的动态过程或机制的显著差异无关。