Department of Biology, Concordia University, Montreal, Québec, Canada.
J Fish Biol. 2020 Aug;97(2):577-582. doi: 10.1111/jfb.14408. Epub 2020 Jun 15.
Teleost fish are neuroplastic and are known to alter their brain morphology and behaviour in response to environmental change such as an increase in predation pressure. The hypothalamus plays a key role in regulating behavioural responses to predation risk. In this study, wild-caught northern red bellied dace (Chrosomus eos) developed smaller and less symmetric hypothalami when held in captivity for 14 days; both measures correlated with boldness in a latency to emerge test. This study's results highlight the potential impact of short-term holding conditions on brains and behaviour.
硬骨鱼类具有神经可塑性，它们会根据环境变化（如捕食压力增加）改变大脑形态和行为。下丘脑在调节对捕食风险的行为反应方面起着关键作用。在这项研究中，在圈养环境中饲养 14 天后，野生北方红腹鱥（Chrosomus eos）的下丘脑体积变小且不对称性降低；这两个指标都与潜伏期出现试验中的大胆程度相关。本研究的结果强调了短期饲养条件对大脑和行为的潜在影响。
