Gametes showed intensive positive phototaxis, after syngamy, motile zygotes showed negative phototaxis.
其配子具有明显的正趋光性，合子具有负趋光性。
However, U. arcuata showed positive phototaxis in red, blue and yellow light, which become more sensitive under red light than blue and yellow.
弯弓蚌螨在三种颜色的光下均表现为正趋光性，对于红光的趋光性反应较黄、蓝光更为敏感；
However, U. arcuata showed positive phototaxis in red, blue and yellow light, which become more sensitive under red light than blue and yellow.
弯弓蚌螨在三种颜色的光下均表现为正趋光性，对于红光的趋光性反应较黄、蓝光更为敏感；
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