McRobert S P, Tompkins L
Behav Neural Biol. 1987 Mar;47(2):151-7. doi: 10.1016/s0163-1047(87)90257-3.
Drosophila affinis is a species whose mating is facilitated by light. Although sexually mature D. affinis males court D. affinis males and females vigorously in the light, they do not perform any of the courtship behaviors in the dark. This lack of courtship is not caused by the males and females being unattractive in the dark, since D. affinis males and females elicit high levels of courtship from Drosophila melanogaster males in light and in darkness. Fertility tests confirmed previous observations that mating occasionally occurs in the dark, suggesting that some D. affinis males are capable of courting in the dark.
亲缘果蝇是一种其交配受光照促进的物种。虽然性成熟的亲缘果蝇雄性在光照下会积极地向亲缘果蝇的雄性和雌性求爱，但它们在黑暗中不会表现出任何求爱行为。这种求爱行为的缺失并非由于雄性和雌性在黑暗中缺乏吸引力，因为亲缘果蝇的雄性和雌性在光照和黑暗中都能引发黑腹果蝇雄性的高水平求爱行为。生育力测试证实了之前的观察结果，即交配偶尔会在黑暗中发生，这表明一些亲缘果蝇雄性有能力在黑暗中求爱。
