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Costco's CEO will step down in January and hand the reins to the retailer's current president_我的网站

一 |     科学家在《当前生物学》杂志上刚刚发表了一篇名为“在实验室中合作以及在野外维持社交网络的吸血蝙蝠”的研究论文。

二 | 他们对普通吸血蝙蝠（Desmodus rotundus）进行22个月的人工饲养及随后的追踪测试。    ISSAQUAH, Wash. -- Costco announced Wednesday that CEO W. Craig Jelinek will step down in January. He’ll be succeeded by the company’s president, Ron Vachris, who has been with Costco for more than 40 years.Jelinek has been CEO of the members-only warehouse chain since 2012, when he took over from Costco co-founder James Sinegal. Vachris started with Costco as a forklift driver and worked his way into management. The company based in Issaquah, Washington, said he has served in every major role related to Costco business operations and merchandising. Jelinek will remain with the company through April in an advisory role and will continue as a member of Costco’s board.。该研究包括对从“大空心树”中选择的大约23只雌性吸血蝙蝠进行的测试，以及在野外的大约200只吸血蝙蝠。在收集上述蝙蝠的数据之前，科学家们记录了在野外栖息的蝙蝠之间的社交合作的观察结果。他们测量了每只蝙蝠与另一只蝙蝠之间的接近程度，并利用皮尔逊相关系数呈现结果。平均数显示了关联的三个要素：亲属关系（血缘关系），梳理行为和分享食物。一旦将蝙蝠释放到野外，研究人员就使用定制的高分辨率传感器对其进行跟踪。

三 | 使用在所有这些时期收集的数据，研究人员表明，圈养的吸血蝙蝠之间的合作关系可以预测它们野外栖息地的距离。根据这项研究（以及以往的类似数据研究），“甚至在控制亲属关系的情况下”，食物共享和社交梳理行为也是相互关联和对称的。

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Published on:04:11:31