一日龄粘虫不同时长吊飞对生殖及寿命的影响
Effect of different tethered flight durations on thereproduction and adult longevity of Mythimna separata (Lepidoptera:Noctuidae)
吕伟祥 江幸福 张 蕾** 罗礼智
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DOI：
作者单位：中国农业科学院植物保护研究所，植物病虫害生物学国家重点实验室，北京 100193
中文关键词：粘虫，1日龄成虫，飞行时长，生殖
英文关键词：Mythimna separata, 1-day old adults, flight duration, reproduction
中文摘要：
【目的】 本研究旨在阐明羽化后1日龄粘虫Mythimna separata（Walker）的飞行潜力以及飞行对成虫生殖和寿命的影响，从而进一步解析粘虫的迁飞行为特征。【方法】 利用室内昆虫飞行磨计算机数据采集系统，研究了羽化后1日龄粘虫吊飞6、9和12 h的飞行能力差异，以及不同时长吊飞后粘虫的生殖参数和成虫寿命的变化情况。【结果】 结果表明，1日龄雌雄蛾均具有一定的飞行能力，但当吊飞时间超过9 h之后，成虫的飞行时间、距离和速度均不再显著上升。除吊飞12 h成虫的飞行速度外，其它处理雌雄蛾的飞行能力之间无显著差异。羽化后1日龄不同时长吊飞对粘虫的生殖均有显著的促进作用，但随着吊飞时间的延长，这种促进作用显著降低。6、9和12 h吊飞处理均导致成虫产卵前期显著缩短，但仅吊飞6和9 h成虫的产卵量和产卵历期显著高于对照。吊飞12 h成虫的产卵量和产卵历期则显著低于吊飞6和9 h的成虫，并和对照差异不显著。吊飞12 h后，雌雄成虫寿命均显著缩短。【结论】 羽化后1日龄飞行显著促进粘虫的生殖，但随着飞行时间的延长，飞行对生殖的促进效应显著减弱。
英文摘要：To describe flight potential of adult Mythimna separata (Walker) one day after emergence and the effect of tethered flight on reproduction and adult longevity, thereby clarifying the migration character. [Methods] A flight mill system was used to examine the effects of different tethered flight durations on adult M. separata one day after emergence. The influences of different flight durations on reproduction were determined by analyzing variation in the reproductive parameters of groups of adults subject to 6, 9 or 12 h tethered flight. [Results] Our results indicate that newly emerged M. separata adults have a moderate flight potential, and there was no significant increase in flight duration, flight distance or flight velocity when adults were subject to tethered flight for more than 9 h. Furthermore, no significant differences were observed between females and males, except in flight velocity when individuals were tethered for 12 h. Flight on day 1 after emergence significantly accelerated reproduction in M. separate but this effect decreased significantly following prolongation of tethered flight duration. The preoviposition period of adults tethered for 6, 9 and 12 h was significantly shortened compared to the control. The lifetime fecundity and oviposition period, however, were only significantly greater than the control in adults tethered for 6 and 9 h. Adults tethered for 12 h displayed obviously lower lifetime fecundity and a shorter oviposition period than those tethered for 6 and 9 h, however, no significant differences were found between those tethered for 12 h and the control. The longevity of both females and males in the 12 h treatment group were both significantly shorter than those in the control. [Conclusion] Therefore, we conclude that relatively short flight on the first day after emergence significantly enhances reproduction but that these effects decrease significantly if the flight duration is prolonged