Effects of experience and social context on prospective caching strategies by scrub jays
Effects of experience and social context on prospective caching strategies by scrub jays
复制标题
DOI：
10.1038/35106560
复制
发表时间：
2001-11-22
期刊：
影响因子：
64.8
通讯作者：
Clayton, NS
中科院分区：
文献类型：
--
作者：
Emery, NJ;Clayton, NS
社会生活的成本与对食物等资源的竞争有关（1）。食物储存可以减少这种竞争，因为食物可以很快收集并隐藏在其他地方（2-4）;然而，这是一个危险的策略，因为缓存可以被其他人偷走（5-9）。灌丛松鸦（Aphelocoma coerulescens）记得'什么'，'在哪里'和'什么时候'，他们缓存（10-13）。像其他鸦科动物一样（6- 9，14），它们记得同种动物在哪里缓存，有机会就会偷，但也会调整自己的缓存策略，以最大限度地减少潜在的偷窃。为了测试这一点，松鸦被允许隐藏在私人（当其他鸟类的视野被遮挡时）或当同种正在观看时，然后私下恢复它们的缓存。在这里，我们表明，松鸦先前的经验，偷窃另一只鸟的缓存随后重新缓存在新的缓存网站恢复试验期间的食物，但只有当他们被观察到缓存。没有偷窃经验的松鸦则没有，即使他们观察到其他松鸦也有。我们的研究结果表明，松鸦与他们以前的经验，作为一个小偷的信息，以未来的可能性窃取另一只鸟，并相应地修改他们的缓存策略。
Social life has costs associated with competition for resources such as food(1). Food storing may reduce this competition as the food can be collected quickly and hidden elsewhere(2-4); however, it is a risky strategy because caches can be pilfered by others(5-9). Scrub jays (Aphelocoma coerulescens) remember 'what', 'where' and 'when' they cached(10-13). Like other corvids(6-9,14), they remember where conspecifics have cached, pilfering them when given the opportunity, but may also adjust their own caching strategies to minimize potential pilfering. To test this, jays were allowed to cache either in private (when the other bird's view was obscured) or while a conspecific was watching, and then recover their caches in private. Here we show that jays with prior experience of pilfering another bird's caches subsequently re-cached food in new cache sites during recovery trials, but only when they had been observed caching. Jays without pilfering experience did not, even though they had observed other jays caching. Our results suggest that jays relate information about their previous experience as a pilferer to the possibility of future stealing by another bird, and modify their caching strategy accordingly.