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Conspecific presence, but not pilferage, influences pinyon jays’ ( Gymnorhinus cyanocephalus ) caching behavior
Learning & Behavior ( IF 1.8 ) Pub Date : 2020-12-02 , DOI: 10.3758/s13420-020-00450-5
Alizée Vernouillet , Hera J. M. Casidsid , Debbie M. Kelly

Caching species store food when plentiful to ensure availability when resources are scarce. These stores may be at risk of pilferage by others present at the time of caching. Cachers may reduce the risk of loss by using information from the social environment to engage in behaviors to secure the resource—cache protection strategies. Here, we examined whether pinyon jays, a highly social corvid, use information from the social environment to modify their caching behavior. Pinyon jays were provided with pine seeds to cache in two visually distinct trays. The cacher could be observed by a non-pilfering conspecific, a pilfering conspecific, or an inanimate heterospecific located in an adjoining cage compartment, or the cacher could be alone. After caching, the pilfered tray was placed in the adjoining compartment where caches were either pilfered (pilfering conspecific and inanimate heterospecific conditions) or remained intact (non-pilfering conspecific and alone conditions). The safe tray was placed in a visible, but inaccessible, location. Overall, pinyon jays reduced the number of pine seeds cached in the pilfered tray when observed, compared with caching alone. However, their caching behavior did not differ between the pilfering conspecific and the non-pilfering conspecific conditions. These results suggest that either pinyon jays were unable to discriminate between the pilfering and non-pilfering conspecifics, or they generalized their experience of risk from the pilfering conspecific to the non-pilfering conspecific. Thus, we report evidence that pinyon jays use cache protection strategies to secure their resources when observed, but respond similarly when observed by pilfering and non-pilfering conspecifics.



中文翻译:

特定的存在,而不是盗窃,会影响pinyon jays(Gymnorhinus cyanocephalus)的缓存行为

高速缓存的物种会大量存储食物,以确保在资源短缺时的可用性。这些存储在缓存时可能会有被其他存储库窃取的风险。缓存器可以通过使用来自社交环境的信息来参与保护资源的行为来降低丢失的风险,即缓存保护策略。在这里,我们检查了高度社交化的pinyon jays是否使用社交环境中的信息来修改其缓存行为。Pinyon松鸦被提供了松树种子,可以藏在两个视觉上不同的托盘中。可以通过位于相邻笼状隔室中的非盗版同种盗版同种无生命的异种来观察该缓存器,或者该缓存器可以是一个人。缓存后,将被窃取的托盘放置在相邻的隔间中,在该隔间中将被窃取的缓存(窃取特定无生命的异种条件)或保持完整(非窃取特定单独的条件)。将安全托盘放置在可见但不易接近的位置。总的来说,与仅进行缓存相比,松子鸦减少了在被盗托盘中缓存的松树种子的数量。但是,它们的缓存行为在窃取特定非窃取特定之间是没有区别的条件。这些结果表明,松果鸟无法区分盗窃和非盗窃物种,或者他们将盗窃行为的风险经验概括为非盗窃行为。因此,我们报告的证据表明,在观察到松子鸦时,它们使用缓存保护策略来保护其资源,但是在通过盗窃和非盗窃特定物种进行观测时,其响应类似。

更新日期:2020-12-03
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