摘要
豚草条纹萤叶甲Ophraella communa LeSage是恶性入侵豚草(Ambrosia artemisiifolia L.)的天敌,用频次分布拟合和多种聚集指数测度等方法对该叶甲的成虫、幼虫和蛹、卵的空间分布型进行研究。结果表明,豚草条纹萤叶甲卵、幼虫+蛹、成虫的空间分布符合负二项分布,种群个体的空间分布为聚集分布。用几种衡量聚集度的指标,对上述各虫态分布的聚集程度进行测定;然后计算出各虫态田间最适理论抽样数。
The leaf beetle, Ophraella communa LeSage, is a accidentally introduced, special herbivore of the alien invasive weed, Ambrosia artemisiifolia L. To understand its dispersion in the new recipient environment, the observed frequency distributions of eggs, larvae plus pupae, and adults were each fitted by statistical distribution models. The negative binomial distribution was recognized for each of the life stages, indicating a contagious distribution. Some aggregation indices were used to describe populations and then to calculate the optimal sample sizes required for the sampling programme.
出处
《昆虫知识》
CSCD
北大核心
2007年第5期711-715,共5页
Entomological Knowledge
基金
国家自然科学基金项目(30470295)
关键词
豚草条纹萤叶甲
豚草
空间分布型
负二项分布
最适抽样数
杂草生防
Ophraella communa, Ambrosia artemisiifolia, spatial pattern of distribution, negative binomial distribution, optimal sample size, weed biological control
