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研究人员调查汪星人鼻子变湿的好处 - 站长搜索
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研究人员调查汪星人鼻子变湿的好处

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2020-09-13 10:25:05 转载来源: cnBeta.COM

据外媒报道,所有的狗主人都曾被他们的宠物用鼻子撞他们的脸或身体的其他部位。狗的鼻子通常是冰冷黏黏的,但其他时候是温暖干燥的

据外媒报道,所有的狗主人都曾被他们的宠物用鼻子撞他们的脸或身体的其他部位。狗的鼻子通常是冰冷黏黏的,但其他时候是温暖干燥的。大多数宠物主人在某些时候都想知道他们的狗的鼻子究竟应该是湿的还是干的。研究人员最近对动物的鼻子进行了研究,发现狗的鼻子又冷又湿是正常的,不过鼻子又热又干也属于正常现象。

来自匈牙利布达佩斯的罗兰大学的研究员Anna Bálint正在研究动物行为。她表示,当狗睡觉时,它们的鼻子通常会变暖然后变干,当狗醒来时,它们会舔舔鼻子,然后它们就又变回又冷又湿的样子。研究人员想知道狗的鼻子变冷是否有好处

他们提出了一种假设--寒冷的鼻子可以帮助狗狗调节体温,但鼻尖太小,不太可能对体温调节做出有意义的贡献。于是研究小组测量了许多动物鼻子的温度,包括马、狗和驼鹿的鼻子。研究小组确定,狗和食肉动物的鼻尖通常比食草动物的更冷。

下一步就是要弄清楚更冷的鼻子在野外是否会给食肉动物带来优势。研究小组对行为和大脑进行了实验,看冷鼻子是否有助于更好的热探测。这个团队成功地训练了三只狗,让它们选择跟潜在猎物温度相同的较暖和的物体,而不是室温下的物体。

结果表明,狗在捕猎猎物时可以察觉到远处微弱的热辐射。在第二次以大脑为中心的调查中,科学家们向13只训练有素的狗展示了一个装有温水和绝缘门的盒子,这些狗被训练成静止躺在一个功能正常的核磁共振扫描仪中。当绝缘门打开时,狗的大脑会有更高的反应并显示出更温暖的表面,而当门关闭时则表现得更冷。

具体来说,在这些测试中,大脑的左半球被激活,这是倾向于处理对食物的反应,这跟许多脊椎动物的掠食性活动有关的一侧。研究人员认为,狗和其他冷鼻动物在捕猎时可以使用热探测和其他感官。

标签: 研究人员 调查 汪星人 鼻子 湿的 好处


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