Lucon-Xiccato Tyrone, Montalbano Giulia, Bertolucci Cristiano
Department of Life Sciences and Biotechnology, University of Ferrara, Via L. Borsari 46, Ferrara, 44121, Italy.
Curr Zool. 2020 Apr;66(2):187-195. doi: 10.1093/cz/zoz039. Epub 2019 Aug 8.
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 and the guppy . 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.
在许多动物物种中，个体在解决认知任务的能力上存在差异。然而，这种变异性背后的机制仍不清楚。有人提出，认知方面的个体差异可能与行为（即个性）上的个体差异有关；这一假设得到了不同程度的支持。在本研究中，我们调查了个性是否与两种硬骨鱼（斑马鱼和孔雀鱼）抑制行为的认知能力相关。在这两个物种中，在标准个性测试（旷场试验）中更大胆的个体，在管道任务中表现出更强的抑制能力，该任务要求它们抑制对封在透明管道中的活猎物的觅食行为。这一发现揭示了鱼类大胆程度与抑制能力之间的关系，并支持了个性与认知之间存在联系的假设。此外，这项研究表明，在进行相同任务测试时，系统发育距离相对较大的物种可能在个性与认知之间表现出相同的联系。
