Predation and dispersal ability of predators can influence their post-release establishment. As physiological factors may influence the predation and dispersal behavior of insects, we tested the effects of starvation on the predation and dispersal behavior of an omnivorous predator Arma chinensis under different prey densities. Logistic regression showed that A. chinensis exhibited a Holling’s Type II functional response regardless of its hunger level. Starvation significantly increased attack rate and reduced prey handling time of A. chinensis. When prey density was low (3 and 6 per plant) A. chinensis that has been starved for 2 and 4 days consumed significantly more second instar Mythimna separata than satiated ones. No significant difference was found in prey consumption among predators of different hunger levels when prey density was high (>12 per plant). When M. separata was absent, starved A. chinensis dispersed faster and spent less time in the target patch; and less than 50% of individuals remained on the plant. When M. separata was available, A. chinensis spent significantly more time in the target patch, and more than 80% of individuals were uniformly distributed on plant seedlings. Hunger level showed more effects on the dispersal of A. chinensis when prey was absent than when prey was available. The implications of these results for the use of A. chinensis in augmentative biological control programs are discussed.

中文翻译：

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饥饿和猎物可用性对杂食性捕食者 Arma chinensis Fallou 捕食和传播的影响

捕食者的捕食和散布能力会影响其释放后的建立。由于生理因素可能会影响昆虫的捕食和传播行为，我们测试了饥饿对不同猎物密度下杂食性捕食者 Arma chinensis 的捕食和传播行为的影响。Logistic 回归表明，无论饥饿程度如何，中华白菜都表现出 Holling 的 II 型功能反应。饥饿显着提高了 A. chinensis 的攻击率并减少了猎物处理时间。当猎物密度较低时（每株 3 和 6 只），饥饿 2 天和 4 天的中华螟比饱食者消耗的二龄 Mythimna separata 多得多。当猎物密度高（每株 >12 只）时，不同饥饿程度的捕食者的猎物消耗没有显着差异。当 M. separata 不存在时，饥饿的 A. chinensis 分散得更快，在目标斑块上停留的时间更少；不到 50% 的人留在工厂。当 M. separata 可用时，A. chinensis 在目标斑块上花费的时间明显更多，超过 80% 的个体均匀分布在植物幼苗上。与有猎物时相比，饥饿水平在没有猎物时对 A. chinensis 的扩散的影响更大。讨论了这些结果对 A. chinensis 在增强生物防治计划中的应用的影响。不到 50% 的人留在工厂。当 M. separata 可用时，A. chinensis 在目标斑块上花费的时间明显更多，超过 80% 的个体均匀分布在植物幼苗上。与有猎物时相比，饥饿水平在没有猎物时对 A. chinensis 的扩散的影响更大。讨论了这些结果对 A. chinensis 在增强生物防治计划中的应用的影响。不到 50% 的人留在工厂。当 M. separata 可用时，A. chinensis 在目标斑块上花费的时间明显更多，超过 80% 的个体均匀分布在植物幼苗上。与有猎物时相比，饥饿水平在没有猎物时对 A. chinensis 的扩散的影响更大。讨论了这些结果对 A. chinensis 在增强生物防治计划中的应用的影响。