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首页> 外文期刊>Ethology >Learning and Memory in Juvenile Zebrafish: What makes the Difference - Population or Rearing Environment?
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Learning and Memory in Juvenile Zebrafish: What makes the Difference - Population or Rearing Environment?

机译：幼年斑马鱼的学习和记忆：与众不同的原因-种群或饲养环境？

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The ability to learn and remember about the surrounding environment is crucial for the survival of organisms in their natural habitats. Adults of numerous fish species have been shown to display sophisticated behaviour related to learning and memory. This study deals with testing learning abilities among juveniles (10wks old) of zebrafish (Danio rerio) through a simple task of finding food. We compared the performance of juveniles from two populations, a wild collected from a natural habitat and an aquarium-bred purchased from a pet shop, reared in bare environment (lacking visual cues). Additionally, we also tested the effect of early habitat enrichment on the performance among juveniles of the aquarium-bred population. The experiments involved training fishes to solve a simple maze (with a food reward at the end) and testing their memory. Learning was measured based on the time taken to complete the task (performance time) of finding food in the maze-arena across repeated trials. Our results showed that juveniles from the two populations possessed significantly different learning abilities. There were population differences in exploratory tendency and time taken to accomplish the task. However, when memory was tested based on performance time between training and test day, individuals (from both populations) were found to be poor at memorizing learnt tasks. On the other hand, juveniles (belonging to aquarium-bred population) reared in spatially complex environments displayed higher rates of learning and were capable of remembering learnt tasks better than their counterparts from bare environments. This study thus demonstrates the importance of rearing conditions and natural ecology in ontogenetic development of learning and memory functions among zebrafish.
机译：学习和记忆周围环境的能力对于生物在自然栖息地中的生存至关重要。已证明许多鱼类的成年动物表现出与学习和记忆有关的复杂行为。这项研究涉及通过简单的寻找食物的任务来测试斑马鱼（Danio rerio）的少年（10周龄以上）的学习能力。我们比较了两种种群的幼鱼的性能，一种是从自然栖息地采集的野生动物，另一种是从宠物店购买的，在裸露的环境（缺乏视觉提示）下饲养的水族馆繁殖的鱼。此外，我们还测试了早期栖息地富集对水族繁殖种群幼鱼性能的影响。实验涉及训练鱼类以解决简单的迷宫（最后奖励食物）并测试其记忆。根据重复试验中完成在迷宫区域寻找食物的任务所花费的时间（表演时间）来衡量学习情况。我们的结果表明，这两个种群中的青少年具有明显不同的学习能力。探索任务和完成任务所需的时间存在人口差异。但是，当根据训练和测试日之间的表现时间对记忆力进行测试时，发现个人（来自两个人群）在记忆学习的任务方面很差。另一方面，在空间复杂的环境中饲养的未成年人（属于水族馆繁殖的种群）显示出更高的学习率，并且比从裸露环境中学习到的任务能够更好地记住已学习的任务。因此，这项研究证明了饲养条件和自然生态学对斑马鱼学习记忆功能的发育发育的重要性。

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