Demography and Population Projection of Flea Beetle, Agasicles hygrophila (Coleoptera: Chrysomelidae), Fed on Alligator Weed Under Elevated CO2

文献类型： 外文期刊

第一作者： Fu, Jian-Wei

作者： Fu, Jian-Wei;Shi, Meng-Zhu;Wang, Ting;Li, Jian-Yu;Zheng, Li-Zhen;Wu, Gang

作者机构：

关键词： Agasicles hygrophila;elevated CO2;life table;leaf consumption;population projection

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

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收录情况： SCI

摘要： The flea beetle, Agasicles hygrophila Selman and Vogt, was introduced into China in 1987. For a more comprehensive understanding of the effect of elevated CO2 concentration on the population dynamics, we collected the life table data of the flea beetle, A. hygrophila, at two different CO2 concentration conditions, i.e., ambient (420 mu l/liter) and elevated (750 mu l/liter). The raw data were analyzed using the age-stage, two-sex life table theory. At 750 mu l/liter CO2, shorter developmental durations of the egg, first instar, and pupa were observed, while the duration of the third instar and the total developmental duration of the larva were prolonged. The generation length of A. hygrophila was significantly shortened at the higher concentration. It was observed that the intrinsic rate of increase (r), finite rate (lambda), and net reproduction rate (R-0) were higher and the mean generation time (T) was shorter at 750 mu l/liter compared with that at 420 mu l/liter. The bootstrap techniques were adopted to estimate the variances and standard errors of the developmental time, longevity, fecundity, and the population parameters. The bootstrap technique generated a normal distribution that was consistent with the central limit theorem and critical for following statistical analysis and comparison. Population projections based on age-stage, two-sex life tables could reveal the stage structure of A. hygrophila population and the leaf consumption capacity. Data collected in this study can potentially be used to evaluate the efficacy of A. hygrophila as a biological control agent of the alligator weed.

分类号： Q969.9

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