Pinyon Jays (Gymnorhinus cyanocephalus) and Clark’s nutcrackers (Nucifraga columbiana) can discriminate between pilfering and non-pilfering conspecifics, but not between heterospecifics

IF 1.9 2区 生物学 Q3 BEHAVIORAL SCIENCES
Alizée Vernouillet, Nanxi Huang, Debbie M. Kelly
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引用次数: 0

Abstract

When foraging, individuals often need to assess potential risk from competitors. Within many food-caching (food-storing) species, individuals can modify their caching behavior depending on whether other individuals are present during the caching event. During caching, individuals may interact with not only conspecifics but also heterospecifics. However, the extent to which individual cachers can discriminate between conspecifics and heterospecifics that present a pilfering threat or not, has received little attention. During this study, we examined this issue with food-storing birds, highly social pinyon jays and less social Clark’s nutcrackers. Cachers were given a choice to store their seeds in one of two visually distinct trays. Subsequently, one of the trays was given to an individual (either a conspecific or a heterospecific) who pilfered the caches, whereas the other tray was given to an individual (either a conspecific or a heterospecific) who did not pilfer the caches. When the two trays were returned to the cachers, they recached the seeds from the tray given to the pilfering observer individual more so than the tray given to the non-pilfering observer, but only when the pilferer was a conspecific. Our results suggest that the pinyon jays and nutcrackers could distinguish between conspecifics based on their pilfering behavior, but not between heterospecifics. Together, our results reconsider the ability of corvids to discriminate between individuals based on their pilfering risk and the importance of doing so while caching.

Pinyon Jays (Gymnorhinus cyanocephalus)和Clark 's nutcracker (Nucifraga columbiana)可以区分偷窃和非偷窃同种,但不能区分异种
觅食时,个体通常需要评估来自竞争对手的潜在风险。在许多食物贮藏物种中,个体可以根据在贮藏过程中是否有其他个体存在来改变它们的贮藏行为。在缓存过程中,个体不仅可以与同种个体相互作用,也可以与异种个体相互作用。然而,个体捕鱼者在多大程度上能够区分具有偷窃威胁的同种和异种,却很少受到关注。在这项研究中,我们用储存食物的鸟类、高度社会化的小松鸦和不那么社会化的克拉克胡桃鸦来研究这个问题。捕捉者可以选择将种子储存在两个视觉上截然不同的托盘中。随后,其中一个托盘给了一个偷缓存的个体(同种或异种),而另一个托盘给了一个不偷缓存的个体(同种或异种)。当两个托盘被归还给捕鼠器时,它们从给偷窃观察个体的托盘中获得种子的次数比给不偷窃观察个体的托盘更多,但只有在偷窃者是同种的情况下。结果表明,小松松鸦和胡桃鸦可以根据其偷窃行为区分同种物种,但不能区分异种物种。总之,我们的研究结果重新考虑了鸦类根据个体的窃取风险区分个体的能力,以及在缓存时这样做的重要性。
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来源期刊
Animal Cognition
Animal Cognition 生物-动物学
CiteScore
4.50
自引率
18.50%
发文量
125
审稿时长
4-8 weeks
期刊介绍: Animal Cognition is an interdisciplinary journal offering current research from many disciplines (ethology, behavioral ecology, animal behavior and learning, cognitive sciences, comparative psychology and evolutionary psychology) on all aspects of animal (and human) cognition in an evolutionary framework. Animal Cognition publishes original empirical and theoretical work, reviews, methods papers, short communications and correspondence on the mechanisms and evolution of biologically rooted cognitive-intellectual structures. The journal explores animal time perception and use; causality detection; innate reaction patterns and innate bases of learning; numerical competence and frequency expectancies; symbol use; communication; problem solving, animal thinking and use of tools, and the modularity of the mind.
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