Reproductive Ecology of Euchaeta Antarctica, A Carnivorous Marine Copepod

极地地区的气候具有明显的季节性变化， 由于大幅度减少或消除初级保健， 冬季生产。 据推测， 在高纬度的南极生物中， 这种极端的季节性食物供应，并允许冬季生存 通过增加身体组织和脂质的储存， 新陈代谢. 严建议进一步研究生态和脂质 一种捕食性桡足类Euchaeta anastritica的代谢 在这个世界性的属中的最大的种，以测试上述假设。 她还将研究这个物种在海洋食物网中的作用， 并确定它的生活史和生理特化 使之适应极地环境 本项目的数据， 结合其他关于南极真刺水蚤的信息， 目前的理解，为什么这个物种是一个主要组成部分， 南极洲的浮游动物和一种主要的浮游食肉动物。 这个项目 将检测雌性真刺水蚤的脂质含量和组成 昆虫，它们的卵和食物 脂肪生成率将是 通过碳-14标记测定。 该项目还将研究变化 在脂质代谢与个体发育和生殖状态，并作为一个 环境温度的作用。 实地工作将在 南极洲帕尔默站

Polar regions characteristically have marked seasonal variation in the availability of food due to great reduction or elimination of primary production during the winter. It is hypothesized that the evolution of large body size in high-latitude planktonic organisms is a response to this extreme seasonality of food supply and permits winter survival by increasing the store of body tissues and lipids available for metabolism. Yen proposes to further examine the ecology and lipid metabolism of Euchaeta antarctica, a predaceous copepod and the largest species in this worldwide genus, to test the above hypothesis. She will also examine the role of this species in the marine food web, and determine how its life history and physiological specializations adapt it for survival in a polar regime. Data from this project in combination with other information on Euchaeta antarctica will advance present understanding of why this species is a major component of Antarctic zooplankton and a dominant planktonic carnivore. This project will examine lipid content and composition of female Euchaeta antarctica, their eggs and their food. Rate of lipogenesis will be determined by carbon-14 labeling. The project also will examine changes in lipid metabolism with ontogeny and reproductive state, and as a function of environmental temperature. Field work will be done at Palmer Station, Antarctica.