影响大猿叶虫交配持续时间的因素

为了探明影响大猿叶虫Colaphellus bowringi Baly交配持续时间的因素，在室内系统观察了一天中的交配起始时间、日龄、交配经历、体重、雄虫密度和温度对交配持续时间的影响.结果表明：一天中不同时间交配的成虫，其交配持续时间有显著差异，在上午8:00的交配持续时间最长，随着时间的推移，交配持续时间逐渐缩短，两者之间呈负相关.不同日龄成虫的交配持续时间有显著差异，且与成虫日龄呈明显的正相关.当雄虫与有交配经历的雌虫交配，其交配持续时间明显长于与未交配的雌虫交配，但雄虫的交配经历对交配持续时间没有影响.交配持续时间随着雌、雄体重的增加而延长，但没有显著差异.在雄虫高密度条件下的交配持续时间明显短于低密度下的交配持续时间.在22℃时成虫的交配持续时间最长，其次是25℃，28℃下最短, 温度间的交配持续时间有明显差异.这些结果表明在自然条件下大猿叶虫的交配持续时间受到许多因素的影响.

Factors influencing mating duration in the cabbage beetle, Colaphellus bowringi Baly (Coleoptera:Cerambycidae)

To understand the factors that influence mating duration in cabbage beetle Colaphellus bowringi Baly, the effects of the mating time of a day, age, mating history, body weight, male density and temperature on mating duration were investigated under laboratory conditions. The results showed that mating duration was significantly affected by the mating time of a day experienced by adults. Mating duration was highest at 8:00 am, and then gradually shortened with time elapse. There is a negative correlation between mating duration and the mating time of a day. There were significant differences in mating duration among the adults with different ages. There is a positive correlation between age and mating duration. The mating duration of a male paired with a mated female was significantly longer than that paired with a virgin female; however, there were no significant differences in mating duration between females paired with a mated or a virgin male. The mating duration was prolonged with increasing female and male body weight, but there was no significant difference. The mating duration under high male density was significantly shorter than that under low male density. The mating duration was highest at 22℃, followed by 25℃ and 28℃, showing significant differences among the three temperatures. These results indicate that the mating durations of C. bowringi were affected by many factors in natural conditions.