MECHANICS OF POPULATION REGULATION IN AEDES TRISERIATUS

三纹伊蚊种群调节机制

• 批准号: 3436592
• 负责人: Todd Philip Livdahl
• 金额: $ 7.51万
• 依托单位: CLARK UNIVERSITY (WORCESTER, MA)
• 依托单位国家: 美国
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-09-30 至 1987-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3436592
• 关键词: animal population density; animal population study; field study; growth /development; larva; radiotracer

Support is requested for inquiries about the influence of population structure of the treehole mosquito, Aedes triseriatus, on the regulation of population density, with a specific focus on the roles of density-dependent release frog egg dormancy and cannibalism of newly hatched larvae on the accuracy with which population density tracks a fluctuating resource base. A second experiment will address the ecological consequences of dispersal and habitat isolation, with a primary focus on the relevance of those factors in determining the distribution and abundance of mosquito larval populations. Evidence from laboratory studies suggests three mechanisms that could contribute to the precise adjustment of larval population density to resource abundance: 1) conditional larva-induced egg hatching stimulation and inhibition; 2) cannibalism by large larvae on newly-hatched larvae; and 3) intense larval responses to initial density and to resource concentration. The proposed investigations will permit a detection of these phenomena in the field if they occur, and the importance of their roles in population regulation. The consequences of dispersal to distribution and abundance of larvae will be examined with manipulations of habitat isolation, reduced through the addition of artificial habitats in clusters around natural treeholes or augmented by sealing off neighboring treeholes.

要求支持关于人口影响的调查 三列伊蚊结构对调节 人口密度，特别侧重于依赖密度的 解除青蛙卵的休眠， 人口密度跟踪波动的资源基础的准确性。 第二个实验将解决扩散的生态后果 和生境隔离，主要侧重于这些问题的相关性， 决定蚊幼虫分布及数量的因素 人口。 实验室研究的证据表明， 有助于精确调整幼虫种群密度， 资源丰富度：1）条件性幼虫诱导卵孵化刺激 2）大型幼虫对刚孵化的幼虫的同类相食; 3)幼虫对初始密度和资源有强烈反应 浓度. 拟议的调查将有助于发现 这些现象在外地，如果他们发生，和他们的重要性， 在人口调控中的作用。 传播对幼虫分布和数量的影响将 通过对栖息地隔离的操作进行检查，通过 在天然树洞周围增加人工栖息地， 通过封闭邻近的树洞来增强。