Mechanics of Food Capture by Copepods

桡足类食物捕获机制

• 批准号: 8917404
• 负责人: Mimi A Koehl
• 金额: $ 10.19万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-01-01 至 1992-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8917404&HistoricalAwards=false
• 关键词: Mechanics; Food; Capture; Copepods

Many planktonic animals use setulose appendages to capture food or molecules, and to swim or propel water. Continued investigations into the physical mechanisms by which such appendages move water and separate particles from it will provide understanding of ecological and evolutionary meaning of shape and mechanical function of the appendages. The food- capturing second maxillae (M2's) of calanoid copepods are of primary importance because of the ecological importance of copepod feeding, and because of the diversity of morphologies and behaviors of M2's operatiang at a range of velocities where transitions in function are expected to occur. Dynamically- scaled physical models, based on data gathered from SEM and high-speed microcinematography of a variety of copepods, will be used: 1) to test predictions of mathematical models of the hydrodynamics of these appendages, and 2) to investigate the performance consequences of morphological features and behaviors too complicated to address mathematically. The investigation will show how defined aspects of body shape, appendage morphology, flapping kinematics, and motions of neighboring appendages affect the leakiness, capture range, particle-selectivity, drag, and power requirements of second maxillae.

许多食肉动物用刚毛状的附属物来捕捉食物 或分子，以及游泳或推动水。 继续 调查的物理机制， 附肢移动水，并将水中的颗粒分离出来， 提供对生态和进化意义的理解， 附件的形状和机械功能。 食物- 捕获哲水蚤桡足类的第二上颌骨（M2）是 由于生态的重要性， 桡足类的进食，由于形态的多样性， 以及M2在一定速度范围内的运行行为， 预期会发生功能转变。 动态地- 比例物理模型，根据从SEM和 对各种桡足类的高速显微摄影， 1）测试数学模型的预测， 这些附件的流体动力学，和2）调查 形态特征的性能后果， 这些行为太过复杂，无法用数学来描述。 的 调查将显示如何定义方面的身体形状， 附肢形态学、扑翼运动学和 邻近的附属物影响泄漏，捕获范围， 第二阶段的颗粒选择性、阻力和功率要求 上颌骨