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首页> 外文期刊>Journal of Medical Entomology >Spatial analysis of Aedes albopictus (Diptera: Culicidae) oviposition in suburban neighborhoods of a Piedmont community in North Carolina
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Spatial analysis of Aedes albopictus (Diptera: Culicidae) oviposition in suburban neighborhoods of a Piedmont community in North Carolina

机译：北卡罗莱纳州皮埃蒙特（Piedmont）社区郊区的白纹伊蚊（Diptera：Culicidae）产卵的空间分析

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Temporal and spatial distribution of egg-laying by Aedes albopictus (Skuse) (Diptera: Culicidae) was investigated in suburban neighborhoods in Raleigh, NC, by using oviposition traps (ovitraps) at fixed sampling stations during the 2002 and 2003 mosquito seasons. Variations in the phenology of oviposition between the two mosquito seasons resulted from differences in the patterns and amounts of rainfall early in the season. Aerial images of each study neighborhood were digitized, and the proportions of specific types of land cover within buffer zones encompassing ovitraps were estimated. Retrospective analyses showed that in some neighborhoods, oviposition intensity was significantly associated with specific types of land cover. However, in general, it seemed that gravid Ae. albopictus searched throughout the landscape for water-filled containers in which to lay eggs. Peridomestic surveys were carried out concurrently with ovitrap collections to estimate production of Ae. albopictus pupae in discarded water-filled containers and the abundance of females in vegetation that made up the resting habitat. Results of linear regression analyses indicated that the mean standing crop of pupae (total and per container) per residence was not a significant predictor of mean egg densities in ovitraps. However, the mean standing crop of adult females was a significant but weak predictor variable, because the magnitude and sign of regression coefficients varied between neighborhoods. Linear spatial regression analyses revealed that oviposition intensity was not spatially dependent on pupal standing crop or the numbers of pupae-positive containers distributed peridomestically. However, a weak spatial dependence on the standing crop of adult females was found in some neighborhoods. Based on spherical variogram models, kriging was carried out to predict the spatial patterns of oviposition in suburban neighborhoods. Focal areas of high and low oviposition intensity were evident in most neighborhoods; however, the spatial patterns of oviposition changed between mosquito seasons. Kriging predictions were evaluated, using cross-validation, by systematically removing each data point from our data set and predicting the removed point by using the remaining points. The root mean square (standardized) error values of best fitting variogram models approximated 1, and plots of standardized PRESS residuals showed no distinct pattern for most neighborhoods, indicating that predictions of the spatial distribution of oviposition intensity were valid. Spherical variogram models are a satisfactory method for describing the spatial distribution of Ae. albopictus oviposition, and kriging can be a useful technique for predicting oviposition intensity at locations that have not been sampled.
机译：在2002年和2003年的蚊虫季节，通过在固定采样站使用产卵诱集器（ovitraps）在北卡罗来纳州罗利市郊区调查了白纹伊蚊（Skuse）（双翅目：Culicidae）产卵的时间和空间分布。两个蚊子季节之间的产卵物候变化是由于该季节早期降雨的方式和降雨量的差异造成的。每个研究邻域的航拍图像都被数字化，并估计了包括产卵器的缓冲区内特定类型土地覆盖的比例。回顾性分析表明，在某些社区中，产卵强度与特定类型的土地覆盖显着相关。但是，总的来说，Ae似乎很心疼。 albopictus在整个景观中搜寻装满卵的水容器。产卵调查与产卵器收集同时进行，以估计Ae的产生。丢弃在盛满水的容器中的白化p和组成栖息地的植被中的雌性丰富。线性回归分析的结果表明，每个居所p的平均站立作物（总数和每个容器）并不是产卵器中卵平均密度的重要预测指标。但是，成年女性的平均站立作物是一个重要的预测变量，但预测指标却很弱，因为回归系数的大小和符号在各个社区之间有所不同。线性空间回归分析表明，产卵强度在空间上不依赖于standing站立的作物或周缘分布的p阳性容器的数量。但是，在某些社区中发现对成年雌性直立作物的空间依赖性较弱。基于球面变异函数模型，进行了克里金法预测郊区邻域的产卵空间格局。在大多数社区中，明显有高和低排卵强度的震源区。然而，在蚊子的季节之间，产卵的空间格局发生了变化。使用交叉验证对Kriging预测进行评估，方法是从我们的数据集中系统地删除每个数据点，并通过使用剩余点来预测删除的点。最佳拟合变异函数模型的均方根（标准化）误差值约为1，标准化PRESS残差图在大多数邻域中均未显示明显的模式，这表明产卵强度的空间分布预测是有效的。球形变异函数模型是描述Ae空间分布的令人满意的方法。白纹虫的产卵和克里金法可以作为一种有用的技术，用于预测未取样位置的产卵强度。

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