| 唐雪，吕宝乾，卢辉，唐继洪，刘彦龙，闫三强,2022,草地贪夜蛾幼虫自残捕食量分析[J].环境昆虫学报,(3):523-529 |
| 草地贪夜蛾幼虫自残捕食量分析 |
| Analysis of cannibalism predation among larvae of Spodoptera frugiperda |
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| DOI： |
| 中文关键词: 草地贪夜蛾 自相残杀 功能反应 幼虫密度 幼虫龄期 |
| 英文关键词:Spodoptera frugiperda cannibalism functional response larval density larval instar |
| 基金项目:国家重点研发计划(2021YFD1400702)；农业部财政项目“海南重大入侵生物—草地贪夜蛾与红火蚁监测与防控”(1630042020020)；海南省重大科技计划资助(ZDKJ2020002) |
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| 中文摘要: |
| 为了明确草地贪夜蛾Spodoptera frugiperda幼虫对同类低龄幼虫的捕食作用，在实验室条件下研究了草地贪夜蛾3~6龄幼虫对不同密度2龄幼虫和4~6龄幼虫对不同密度3龄幼虫的日捕食量，同时从捕食功能的角度解析了草地贪夜蛾高龄幼虫对低龄幼虫的捕食行为；并对不同龄期幼虫进行称重比较，用不同龄期幼虫间的重量关系来替换不同龄期幼虫间的捕食量，得到不同龄期幼虫间的捕食量方程。结果表明，草地贪夜蛾3~6龄幼虫对2龄幼虫和4~6龄幼虫对3龄幼虫的捕食功能反应均符合Holling Ⅱ型功能反应类型。草地贪夜蛾3~6龄幼虫对2龄幼虫的最大捕食量分别为76.47头、85.70头、117.92头、96.05头；4~6龄幼虫对3龄幼虫的最大捕食量分别为38.83头、59.49头、58.87头。高龄幼虫对低龄幼虫的捕食量随猎物密度的增加而增加。最大理论捕食质量方程y=47.231x^0.4591，捕食者的捕食量随着猎物虫态的增大而逐渐减小。研究结果为理解草地贪夜蛾幼虫的种间自残行为规律奠定了一定的理论基础。 |
| 英文摘要: |
| In order to clarify the predation effect of Spodoptera frugiperda larvae on low instar larvae of the conspecific, the daily predation of the 3rd to 6th instar larvae on the 2nd larvae of different densities and the 4th to 6th instar larvae on the 3rd larvae of different densities were observed under laboratory conditions. At the same time, the predation behavior of the older larvae of S. frugiperda to the young larvae was analyzed from the point of view of functional response. Weighing the body weight of different instar larvae, the predation amount of different instar larvae was replaced by the weight relationship of different instar larvae, and the predatory function corresponding equations of different instar larvae was obtained. The results showed that the functional response of the 3rd to 6th instar larvae to the 2nd larvae and the 4th to 6th instar larvae to the 3rd larvae fitted well with the Holling II mode. The maximum predation of the 3rd to 6th instar larvae on the 2nd instar larvae were 76.47, 85.70, 117.92 and 96.05 respectively, and the maximum predation of the 4th to 6th instar larvae on the 3rd instar larvae were 38.83, 59.49 and 58.87 respectively. The predation of the older larvae to the younger larvae increased with the increase of the density of the younger larvae. The maximum theoretical predation mass equation is y=47.231x^0.4591，and the amount of predation decreases with the increase of the state of prey. The results of this experiment laid a theoretical foundation for understanding the interspecific cannibalistic behavior of S. frugiperda larvae. |
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