Demographic analysis of reproduction in Nearctic and Palearctic populations of Coccinella septempunctataand Propylea quatuordecimpunctata
Demographic analysis of reproduction in Nearctic and Palearctic populations of Coccinella septempunctataand Propylea quatuordecimpunctata
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近北区和古北区七星瓢虫和Propylea quatuordecimpunctata种群繁殖的人口统计分析
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发表时间：
2000
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通讯作者：
J. Obrycki
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作者：
M. Phoofolo;J. Obrycki
在北美，七星瓢虫和四星拟谷盗已经证明了它们的入侵能力。需要进行研究，以确定相关的生活史参数负责其成功的空间传播。本研究对这两种瓢虫的几个古北和新北种群的生殖性状进行了详细的表型变异分析。C.七星瓢虫的雌性在它们成年后的头两周内产下了第一批卵。在四点斑螟种群中，56%~ 83%的雌虫在2周内开始产卵。其余的雌性要么产卵前期> 2周，要么在60天的观察期内从未产卵。每日繁殖力的分析显示，在每个人口中的女性之间的产卵策略的差异。C.日产重的重复性估计。爱荷华州（USA）、特拉华州（USA）、法国和乌克兰的七星鸟种群的平均种群密度分别为0.32、0.35、0.28和0.33。加拿大、法国和土耳其的四斑拟步行虫种群的重复性估计值分别为0.35、0.25和0.33。内的女性组成部分占每日奇偶校验的变化，这是由于女性的变化，他们的每日产卵率。
Coccinella septempunctata and Propylea quatuordecimpunctata in North America have documented invasive capacity. Studies are needed to identify relevant life-history parameters responsible for their successful spatial spread. This study is a detailed analysis of phenotypic variation in reproductive traits of several Nearctic and Palearctic populations of these two coccinellid species. From 47 to 61% of C. septempunctata females laid their first batch of eggs within the first two weeks of their adult life. Within P. quatuordecimpunctatapopulations, 56 to 83% of females initiated oviposition within 2 weeks. The remaining females either had preoviposition periods > 2 weeks or never laid eggs during a 60-day observation period. Analysis of daily fecundity revealed differences in oviposition strategies among females within each population. Repeatability estimates of daily parity for C. septempunctata populations were 0.32 for Iowa (USA), 0.35 for Delaware (USA), 0.28 for France, and 0.33 for Ukraine. Repeatability estimates for P. quatuordecimpunctata populations were 0.35 for Canada, 0.25 for France, and 0.33 for Turkey. The within-female component accounted for most of the variation in daily parity; this was due to female variability in their daily oviposition rates.