Chemical Modulation of Marine Deposit Feeding

存款喂养是重要的门转移或埋葬 所有到达海底的粒子， 从通过营养网的流动到 地层记录 燃料存款喂养的资源， 但是，除了少数几个明显例外，仍然难以确定。 通过化学检测和生物实验， 食品检测和消化的过程，该项目将 我试图归纳出一种方法， 例外. 这个项目将以理论为指导， 当材料通过肠道时，净吸收率最大化 一个有机体 该项目的重点是三个具体的 调节导致这种最大化的过程的过程， 即嗅觉、味觉和肠道壁的吸收。 气味和 味道将通过化学、操作定义来确定 基于对扩散或接触的化合物的响应。 疗效 在实验室中引起进食反应的化合物将 在野外测试它们作为引诱剂的作用。 而 感知能力和营养价值之间的相关性将不会 完美，不完美影响了这些动物的能力， 来感知食物的存在，所以它本身也很有趣 的 摄入食物焦点的最佳肠道保留时间概念 注意食品质量的动力学定义， 确定还可能导致识别可用的 食物资源。 消化食物吸收的测量 肠壁将允许这些模型的明确测试， 在普吉特海湾的一系列动物身上进行吸收最大化， 缅因州海湾。

Deposit feeding is important in gating the transfer or burial of all particles that arrive at the seafloor, with implications ranging from flow through trophic webs to resolution of the stratigraphic record. The resources that fuel deposit feeding, however, remain poorly identified-with a few notable exceptions. By chemical examination and biological experimentation that isolate the processes of food detection and digestion this project will attempt to generalize the approach used to create a pair of those exceptions. This project will be guided by theory that predicts maximization of net absorption rate as material transits the gut of an organism. The focus of the project is on three specific processes that modulate processes leading to this maximization, namely smell, taste and absorption across the gut wall. Smell and taste will be determined with chemical, operational definitions based on response to diffused or contacted compounds. The efficacy of compounds that elicit feeding responses in the laboratory will be tested for their roles as attractants in the field. While the correlation between sensing ability and nutritional value will not be perfect, the imperfection affects the ability of these animals to sense the presence of food and so itself is of interest. The concept of optimal gut retention times of ingested food focuses attention on a kinetic definition of food quality, whose determination will also likely result in identification of usable food resources. Measurements of absorption of digested foods into the gut wall will allow explicit tests of these models of absorption maximization on a series of animals from Puget Sound and the Gulf of Maine.