Abstract In a number of animal species, individuals differ in their ability to solve cognitive tasks. However, the mechanisms underlying this variability remain unclear. It has been proposed that individual differences in cognition may be related to individual differences in behavior (i.e., personality); a hypothesis that has received mixed support. In this study, we investigated whether personality correlates with the cognitive ability that allows inhibiting behavior in 2 teleost fish species, the zebrafish Danio rerio and the guppy Poecilia reticulata. In both species, individuals that were bolder in a standard personality assay, the open-field test, showed greater inhibitory abilities in the tube task, which required them to inhibit foraging behavior toward live prey sealed into a transparent tube. This finding reveals a relationship between boldness and inhibitory abilities in fish and lends support to the hypothesis of a link between personality and cognition. Moreover, this study suggests that species separated by a relatively large phylogenetic distance may show the same link between personality and cognition, when tested on the same tasks.

中文翻译：

---

两种鱼类的个性特征随抑制能力的个体差异而变化

摘要 在许多动物物种中，个体解决认知任务的能力不同。然而，这种变异性背后的机制仍不清楚。有人提出认知的个体差异可能与行为（即性格）的个体差异有关；一个得到不同支持的假设。在这项研究中，我们调查了性格是否与允许抑制 2 种硬骨鱼（斑马鱼 Danio rerio 和孔雀鱼 Poecilia reticulata）行为的认知能力相关。在这两个物种中，在标准性格测定（开放场测试）中更大胆的个体在管任务中表现出更强的抑制能力，这要求它们抑制对密封在透明管中的活猎物的觅食行为。这一发现揭示了鱼的胆量和抑制能力之间的关系，并支持人格和认知之间存在联系的假设。此外，这项研究表明，当在相同的任务上进行测试时，被相对较大的系统发育距离分开的物种可能会显示出个性和认知之间的相同联系。