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Navigational strategies underlying temporal phototaxis in Drosophila larvae
bioRxiv - Animal Behavior and Cognition Pub Date : 2020-10-12 , DOI: 10.1101/2020.01.06.896142
Maxwell L. Zhu , Kristian J. Herrera , Katrin Vogt , Armin Bahl

Navigating across light gradients is essential for survival for many animals. However, we still have a poor understanding of the algorithms that underlie such behaviors. Here we develop a novel phototaxis assay for Drosophila larvae in which light intensity is always spatially uniform but updates depending on the location of the animal in the arena. Even though larvae can only rely on temporal cues in this closed-loop setup, we find that they are capable of finding preferred areas of low light intensity. Further detailed analysis of their behavior reveals that larvae turn more frequently and that heading angle changes increase when they experience brightness increments over extended periods of time. We suggest that temporal integration of brightness change during runs is an important - and so far largely unexplored - element of phototaxis.

中文翻译:

果蝇幼虫时间趋光性的导航策略

穿越光梯度对于许多动物的生存至关重要。但是,我们仍然不了解这种行为的基础算法。在这里,我们为果蝇幼虫开发了一种新型的趋光性测定法,其中光强度在空间上始终是均匀的,但根据动物在舞台上的位置而更新。即使幼虫在这种闭环设置中只能依靠时间线索,我们也发现它们能够找到低光照强度的首选区域。对它们行为的进一步详细分析表明,幼虫在更长时间内经历亮度增加时,它们的转动频率会更高,并且航向角变化也会增加。我们建议,运行过程中亮度变化的时间积分是重要的,而且至今尚未开发。
更新日期:2020-10-13
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