摘要
就光周期对小悍蟋T a rta rog ry llusm inuscu lus若虫发育及成虫繁殖的影响进行了调查.结果表明,在30℃恒定长日(LD16 h∶8 h)条件下,小悍蟋若虫63 d内全部供试个体完成羽化,而在恒定短日(LD 12 h∶12 h)条件下,小悍蟋若虫120 d之内仍只有90%的个体完成羽化;将孵化后第7 d和第35 d的若虫自短日条件向长日条件转移,能够促进小悍蟋若虫的发育,而反方向的转移则对小悍蟋若虫的发育几乎不起影响.这表明小悍蟋若虫存在滞育现象,短日条件诱导滞育,长日条件解除滞育,并且低龄若虫对长日条件比较敏感.光周期不仅影响小悍蟋若虫发育,而且也影响成虫的繁殖.长日条件下的成虫产卵量显著多于短日条件下的成虫产卵量.但是,光周期对成虫产卵前期间无明显影响.
The effects of photoperiod on nymphal development and adult reproduction were investigated to understand the seasonal life-cycle strategy of a cricket, Tartarogryllus minusculus, in ghuzhou, Hunan. The present results indicate that nymphal development was greatly influenced by photoperiod. The mean duration of nymphal development was 63 days in constant long photoperiod （LD 16：8 hours） at 30℃. But the mean duration of nymphal development was over 120 days in constant short photoperiod （LD 12 ： 12 hours） at 30℃. Nymphal development was very rapid when the nymphs were transferred from LD 12 ： 12 hours to LD 16 , 8 hours at 7 days and 35 days after hatching. However, nymphal development was not prolonged when the nymphs were transferred from LD 16 ： 8 hours to LD 12 ： 12 hours at 7 days and 20 days after hatching, This implicates that a nymph of this species has a winter diapause that was induced and maintained by short days and terminated by long days. Nymphs of T. minusculus were most sensitive to long photoperiod during their early life. At the same time, photoperiod made effects on the reproduction output too. Adults in LD 16 ： 8 hours produced more total eggs than adults in LD 12 ： 12 hours. But there was no difference in preoviposition between LD 16 ： 8 hours and LD 12 ： 12 hours.
出处
《中南林学院学报》
CSCD
北大核心
2006年第1期34-40,共7页
Journal of Central South Forestry University
关键词
昆虫学
小悍蟋
光周期
滞育
若虫发育
生活史策略
entomology
Tartarogryllus minusculus
photoperiod
diapause
nymphal development
life-cycle strategy
