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首页> 外文期刊>Canadian Journal of Zoology >Strain-specific alteration of zebrafish feeding behavior in response to aversive stimuli
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Strain-specific alteration of zebrafish feeding behavior in response to aversive stimuli

机译：斑马鱼摄食行为对厌恶刺激的应变特异性变化

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Behavioral management of risk, in which organisms must balance the requirements of obtaining food resources with the risk of predation, has been of considerable interest to ethologists for many years. Although numerous experiments have shown that animals alter their foraging behavior depending on the levels of perceived risk and demand for nutrients, few have considered the role of genetic variation in the trade-off between these variables. We performed a study of four zebrafish (Danio rerio (Hamilton, 1822)) strains to test for genetic variation in foraging behavior and whether this variation affected their response to both aversive stimuli and nutrient restriction. Zebrafish strains differed significantly in their latency to begin foraging from the surface of the water under standard laboratory conditions. Fish fed sooner when nutrients were restricted, although this was only significant in the absence of aversive stimuli. Aversive stimuli caused fish to delay feeding in a strain-specific manner. Strains varied in food intake and specific growth rate, and feeding latency was significantly correlated with food intake. Our results indicate significant genetic variation in foraging behavior and the perception of risk in zebrafish, with a pattern of strain variation consistent with behavioral adaptation to captivity.
机译：多年来，生态学家对风险行为进行了广泛的关注，在行为管理中，生物必须在获取食物资源的需求与掠夺风险之间取得平衡。尽管大量实验表明，动物会根据感知到的风险和对营养的需求水平来改变其觅食行为，但很少有人考虑过遗传变异在这些变量之间权衡取舍中的作用。我们对四种斑马鱼（Danio rerio（Hamilton，1822））菌株进行了研究，以测试其觅食行为的遗传变异以及该变异是否影响其对厌恶刺激和营养限制的反应。斑马鱼品系在标准实验室条件下从水面开始觅食的潜伏期差异很大。在限制营养的情况下，鱼类可以更快地进食，尽管这仅在缺乏厌恶刺激的情况下才有意义。厌恶性刺激导致鱼类以特定菌株的方式延迟进食。菌株的食物摄入量和特定增长率不同，并且进食潜伏期与食物摄入量显着相关。我们的结果表明，在斑马鱼的觅食行为和风险感知中存在显着的遗传变异，其应变变异的模式与圈养的行为适应相一致。

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