CLIMATIC EFFECTS ON MOSQUITO EGG HATCH PATTERNS

该项目将检查树栖蚊子伊蚊的反应。 Triseriatus，对当地气候条件的变化，具有特殊的 关注降水模式和可变休眠的演变 在蛋孵化之前。该项目的中心假设是 干燥的栖息地应该有更高的干燥概率，这 应该促进在延误之前更大变化的演变 孵化。与这一问题有关的问题涉及 个人健康的其他方面(例如幼虫发育率、成虫 身体大小、对拥挤的敏感性)和孵化延迟 种群孵化率的变异性与种群密度的关系 高密度的虫卵有抑制孵化的趋势 幼虫。 核心问题将通过比较23个国家的孵化率来解决 从新泽西到北卡罗来纳州的人口。所有这些都是 在过去的几年里，人口经历了类似的温度制度 在过去的三十年里，但它们每年的变化幅度高达两倍 降水。其中，两个种群的舱口变化最大 变化最小和最早孵化的时间和时间为 检查以评估与其他功能的关联度 影响健康。我们假设孵化时间的变化是 最重要的是在最容易发生夹层的环境中，以及其他 与健康相关的特征将主要围绕孵化延迟来构建 在这些人群中。我们还将比较鸡蛋对来自 这四个种群对幼虫的存在，预计 孵化时间变异水平最低的种群应该表现出 鸡蛋的敏感度最高。 如果在实验室中可以发现蛋孵化策略的不同， 气候重要性的测试将通过比较 来自两个最不同群体的实验队列的成功， 以及在野外条件下放置的模拟栖息地中的杂交队列

This project will examine responses of the treehold mosquito, Aedes triseriatus, to variation in local climatic conditions, with a particular focus on precipitation patterns and the evolution of variable dormancy prior to egg hatch. The central hypothesis of the project is that relative dry habitats should have a higher probability of desiccation, which should promote the evolution of greater variation in delays before hatching. Questions associated with this issue concern the association of other aspects of individual fitness (e.g. larval development rate, adult body size, sensitivity to crowding) with hatch delay, as well as the relationship between the variability in hatch rate for a population and the tendency of eggs to be inhibited from hatching by high densities of larvae. The central questions will be addressed by comparing hatch rates for 23 populations from New Jersey to North Carolina. All of these populations have experienced comparable temperature regimes during the last three decades, but they vary by as much as a factor of two in annual precipitation. Of these, two populations with the most variable hatch times and two with the least variable and earliest hatching will be examined to assess the degree of association with other features influencing fitness. We hypothesize that hatch time variation has been most important in the most dissection-prone environments, and that other fitness-related traits will be most heavily structured around hatch delay in those populations. We will also compare the sensitivity of eggs from these four populations to the presence of larvae, anticipating that the populations with the lowest levels of hatch time variation should exhibit the largest degree of egg sensitivity. If differences in egg hatching strategies can be found in the laboratory, a test for the importance of climate will be performed by comparing the success of experimental cohorts from the two most different populations, as well as hybrid cohorts, in simulated habitats placed in field conditions