Timing of male physiological and behavioral maturation inDrosophila silvestris (Diptera: Drosophilidae)
Timing of male physiological and behavioral maturation inDrosophila silvestris (Diptera: Drosophilidae)
复制标题
果蝇雄性生理和行为成熟的时间（双翅目：果蝇科）
作者：
C. Boake;E. Adkins
当雌性果蝇与性成熟的雄性果蝇一起饲养时，雌性果蝇卵巢的发育会加快（Craddock和Boake， 1992）。与同龄的雄性生活在一起的雌性要多花20%的时间才能成熟。如果性成熟的雄性向不成熟的雌性求爱，这种影响可能是由于求爱过程中传递的信号。雄鼠性成熟的年龄会影响与成熟雄鼠同住的雌鼠与与自己年龄相仿的雄鼠同住的雌鼠的处理差异的持续时间。性成熟可以定义为雄性求爱的开始或精子成熟的时间，如果这两者不同的话。我们研究了果蝇雄性行为成熟和精子成熟的时间。在实验室条件下，雄虫在羽化后1周左右成熟，雌虫在羽化后3周左右成熟，一代需要3个月左右。我们做了三个实验。首先，我们观察了与不成熟雌性同住的成熟雄性的行为，以了解它们是否会向不成熟的雌性求爱。我们的第二个实验是通过将未成熟的雄性和雌性放在一起，来了解雄性求爱行为开始的年龄。我们最后的实验检验了精子成熟和雄性求偶行为开始的相对时间。
Ovarian development in females of Drosophila silvestris is accelerated when females are housed with sexually mature males (Craddock and Boake, 1992). Females that are housed with males of their own age take about 20% longer to become mature. This effect could be due to a cue transmitted in courtship, if sexually mature males court immature females. The age at which males become sexually mature will affect the duration of the difference in treatments between females housed with mature males and females housed with males of their own age. Sexual maturation can be defined as the onset of male courtship or as the time of sperm maturation, if these differ. We examined the timing of male behavioral maturation and sperm maturation in Drosophila silvestris. Under laboratory conditions, males mature about 1 week after eclosion, females mature about 3 weeks after eclosion, and a generation takes about 3 months. We conducted three experiments. First, we observed the behavior of mature males that were housed with immature females, to learn whether they would court immature females. Our second experiment was designed to learn the age of the onset of male courtship behavior, by housing immature males and females together. Our final experiment examined the relative times of sperm maturation and of the onset of male courtship behavior.