Functional and Evolutionary Analysis of an Inducible, Phenotypically Plastic Feeding Morphology

诱导型、表型可塑性摄食形态的功能和进化分析

• 批准号: 9317293
• 负责人: Dianna Padilla
• 金额: $ 22万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317293&HistoricalAwards=false
• 关键词: Functional; Evolutionary; Analysis; Inducible; Phenotypically

9217293 Padilla Some organisms are able to respond to changing environments during their lifetime, while others are not; their morphology, physiology, or behavior may be fixed, not allowing quick responses to their environmental changes. The objectives of the proposed research are to understand the conditions favoring the ability of an organism to change the way it is built (its morphology) during its lifetime as opposed to having a fixed morphology. This will be accomplished by direct experimentation and observation as well as the use of mathematical and computer models. The PI will use the feeding structures of the marine snail, Lacuna, as a model system for this study. The animal is abundant, easy to breed and use for laboratory and field experiments, and is known to have a feeding morphology that can change when these snails move to different environments and eat different foods. The environmental cues that are used by these snails to induce new feeding structures and measure the consequences of these changes for an animal's feeding rate, growth rate, and lifetime reproduction will be determined.. With the use of mathematical and computer models the PI can make predictions about conditions that would favor individuals that can change their morphology as opposed to having a fixed morphology. These would include how often the environment changes (or individuals move from one environment to another), how long it takes for a new feeding structure to form, and what the cost (for example in reduced feeding rate) of having a feeding structure mismatched to the environment. These predictions will be directly tested on th ese marine snails. The PI will also determine if there is a genetic basis for differences in these features among snails, and examine closely related species to determine the evolutionary patterns associated with being able to change morphology with changing environments. *** ~ ! ! ! F 4 CG Times Symbol & Arial Tms Rmn " Helv 8 8 h / Rochelle D Ray Rochelle D Ray

9217293帕迪拉（Padilla）有些生物能够在其一生中对不断变化的环境做出反应，而另一些生物则没有。它们的形态，生理或行为可能是固定的，不允许对环境变化的快速反应。拟议研究的目标是了解有利于生物体在其一生中改变其建立方式（形态）的能力的条件，而不是具有固定的形态。这将通过直接的实验和观察以及数学和计算机模型的使用来实现。 PI将使用海洋蜗牛Lacuna的饲养结构作为本研究的模型系统。该动物丰富，易于繁殖和用于实验室和野外实验，众所周知，当这些蜗牛移动到不同的环境并吃不同食物时，喂养形态可能会改变。这些蜗牛用来诱导新的喂养结构的环境提示，并衡量这些变化对动物的喂养率，增长率和终生繁殖的后果。通过使用数学和计算机模型，PI可以对可以改变其形态的个人的条件做出预测，而不是具有固定的形态，而不是具有固定的形态。这些将包括环境变化的频率（或个人从一个环境转移到另一个环境），新的喂养结构需要多长时间，以及使喂养结构与环境不匹配的成本（例如，降低的喂食率）。这些预测将直接对海洋蜗牛进行测试。 PI还将确定蜗牛之间这些特征差异是否存在遗传基础，并检查密切相关的物种以确定与能够随着环境变化的变化形态相关的进化模式。 ***〜！ 呢 呢 F 4 CG TIMES符号和Arial TMS RMN“ HELV 8 8 H / Rochelle D Ray Rochelle D Ray