Department of Entomology, Shandong Agricultural University, Taian, Shandong, 271018, P. R. China.
The State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, P. R. China (
J Insect Sci. 2017 Jan 1;17(2). doi: 10.1093/jisesa/iex005.
Photoperiod is an important factor influencing many biological processes including population dynamics of many insect species in temperate zones. To determine the population response of Chrysoperla nipponensis under altered conditions (high temperature and short photoperiod) and to test whether the short photoperiod was suitable for artificial storage, the life table data of were collected at 25 °C under a long photoperiod, 15:9 h (L:D), and a short photoperiod, 9:15 h (L:D) and analyzed using the age-stage, two-sex life table approach. We found that developed faster under long photoperiod than under the short photoperiod. The shorter developmental time, higher fecundity, and higher proportion of females found during the long photoperiod resulted in higher intrinsic and net reproductive rates, but a shorter mean generation time and life expectancy compared to those reared during the short photoperiod. Individuals reared under the short photoperiod also had a high reproductive value. Population projection demonstrated that reared at long photoperiod would complete four generations in 150 d, while reared under short photoperiod would just be entering the second generation. Our results demonstrated that the different fitness values obtained for individuals by varying photoperiod lengths, were readily distinguishable when using the age-stage, two-sex life table.
光周期是影响许多生物过程的一个重要因素，包括温带地区许多昆虫物种的种群动态。为了确定在改变的条件（高温和短光周期）下日本黄脊竹蝗的种群反应，以及测试短光周期是否适合人工储存，在长光周期 25°C 下收集了生命表数据，15:9 h（L:D）和短光周期，9:15 h（L:D），并使用龄期-两性生命表方法进行了分析。我们发现，在长光周期下比在短光周期下发育得更快。在长光周期下发现的较短的发育时间、更高的繁殖力和更高比例的雌性导致更高的内在和净生殖率，但与在短光周期下饲养的相比，平均世代时间和预期寿命更短。在短光周期下饲养的个体也具有高生殖值。种群预测表明，在长光周期下饲养的个体将在 150 天内完成四代，而在短光周期下饲养的个体才刚刚进入第二代。我们的结果表明，通过改变光周期长度获得的个体不同的适合度值，在用龄期-两性生命表时很容易区分。
