椰甲截脉姬小蜂野外种群与实验种群差异性比较
Comparisons of the field and laboratory populations of Asecodes hispinarum Bouek
孙蕊芬1**,田小青2,张先敏3,李样聪1,全峰1,朱麟1***
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作者单位：1海南师范大学生命科学学院 海南省热带动植物生态学重点实验室海口571158;2上海市金山区林业站上海201500; 3 海南省林业科学研究所海口571100
中文关键词：椰甲截脉姬小蜂， 种群差异性， 性比
英文关键词：Asecodes hispinarum, population differences, sex ratios
中文摘要： 通过随机抽样，比较了椰甲截脉姬小蜂Asecodes hispinarum Bouek林间种群与室内种群的雌雄比、出蜂量、未出蜂量、怀卵量的差异。t检验表明这些参数在2个种群间均存在显著的差异。野外种群和室内种群雌蜂比例分别占81.63%±2.54%和65.34%±1.80%，出蜂量分别是(25.13±1.17)头和(52.90±1.88)头。利用相关分析分析了寄主大小对寄生蜂性比的影响，表明寄主大小和寄生蜂雌雄比没有相关关系，不符合Charnov建立的寄生雌雄比与寄主大小关系的数学模型。
英文摘要： Field and laboratory populations of the parasitoid Asecodes hispinarum Bouek were randomly sampled, and sex ratios, the number of emerged and unemerged adults and egg numbers compared between the two populations. t\|test indicated that these parameters differed significantly between the two populations. The proportion of females in the field population was 81.63%±2.54% compared to 65.34%±1.80% in the laboratory population and the number of emerged adults in the field population was 25.13±1.17 compared to 52.90±1.88 in the laboratory. The effect of host size on sex ratio was analyzed by correlation analysis; no relationship between host size and sex ratio was observed. This result is contrary to the prediction derived from Charnov’s model.