Fatherhood increases attraction to sensory stimuli from unrelated pups in male California mice, Peromyscus californicus
Fatherhood increases attraction to sensory stimuli from unrelated pups in male California mice, Peromyscus californicus
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DOI：
10.1016/j.anbehav.2023.02.001
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发表时间：
2023-02-28
期刊：
影响因子：
2.5
通讯作者：
Saltzman，Wendy
中科院分区：
文献类型：
--
作者：
Arquilla，April M.;Wilson，Kerianne M.;Saltzman，Wendy
当成为父母时，雌性哺乳动物会经历广泛的生理和行为变化，从而促进父母照顾的开始。这些包括增加的吸引力，从新生儿的感官刺激，介导的荷尔蒙和神经的变化，伴随着怀孕和分娩。在一些双亲物种中，新的父亲也变得更吸引新生儿;然而，潜在的机制尚不清楚。我们在双亲加州小鼠中研究了成为父亲对雄性对来自无关幼崽的两种感官刺激-气味和发声-的行为反应的影响。首次父亲和年龄匹配的处女男性暴露于10分钟的小狗相关的刺激（小狗的气味，小狗的发声或两者），同时，控制刺激（无味棉花和白色噪音）在1 × 1米的开放领域竞技场。父亲花了显着更多的时间在接近和接触与小狗相关的刺激，无论感官形式，比控制刺激，而处女显示出他们的反应，小狗相关的和控制刺激没有差异。无论是父亲还是处女差异小狗的气味，小狗的发声或这些刺激的组合，然而，男性同时暴露于小狗的气味和发声花更少的时间在竞技场墙壁附近的男性相比，在所有其他刺激条件下，花更多的时间在空的角落里的竞技场相比，只有小狗的气味。这些结果表明，父亲被吸引到小狗的刺激，但不显示出差异的吸引力，以特定的感官方式。处女男性，相反，不表现出吸引力或厌恶这些刺激。我们的研究结果将有助于阐明新父亲父母行为开始的潜在机制，特别强调感觉可塑性。
When becoming parents, female mammals undergo extensive physiological and behavioural changes that facilitate the onset of parental care. These include increased attraction to sensory stimuli from neonates, mediated by hormonal and neural shifts accompanying pregnancy and parturition. In some biparental species, new fathers also become more attracted to neonates; however, the underlying mechanisms are not clear. We examined the effects of becoming a father on males' behavioural responses to two sensory stimuli from unrelated pups – odour and vocalizations – in the biparental California mouse. First-time fathers and age-matched virgin males were exposed for 10 min to a pup-related stimulus (pup odour, pup vocalizations or both) and, simultaneously, to a control stimulus (unscented cotton and white noise) in a 1 × 1 m open-field arena. Fathers spent significantly more time in proximity to and in contact with pup-related stimuli, regardless of sensory modality, than control stimuli, while virgins showed no differences in their responses to pup-related and control stimuli. Neither fathers nor virgins responded differentially to pup odours, pup vocalizations or the combination of these stimuli; however, males exposed simultaneously to pup odours and vocalizations spent less time near the arena walls compared to males in all other stimulus conditions and spent more time in the empty corners of the arena compared to males presented with only pup odour. These results suggest that fathers are attracted to pup stimuli but do not show differential attraction to specific sensory modalities. Virgin males, in contrast, do not demonstrate either attraction or aversion to these stimuli. Our findings will help to elucidate the mechanisms underlying the onset of parental behaviour in new fathers, with particular emphasis on sensory plasticity.