Evidence for a dome-shaped relationship between turbulence and larval fish ingestion rates
Evidence for a dome-shaped relationship between turbulence and larval fish ingestion rates
复制标题
湍流与幼鱼摄食率之间圆顶形关系的证据
DOI：
10.4319/lo.1994.39.8.1790
复制
发表时间：
1994
影响因子：
4.5
通讯作者：
W. C. Leggett
中科院分区：
文献类型：
--
作者：
B. MacKenzie;T. Miller;S. Cyr;W. C. Leggett
最近的理论研究表明，小规模的湍流增加了幼鱼和猎物之间的相遇率。这一发现已经扩展到表明在动荡的环境中摄食率会增加。然而，这种外推假设湍流对相遇后的行为（例如追求成功）没有有害影响。我们开发了一个分析模型来估计在湍流环境中觅食的幼鱼成功追捕猎物的概率。研究表明，捕食的总体概率是湍流速度的一个圆顶函数，最大值的高度和位置取决于湍流水平和捕食者和猎物的行为特征。高度动荡的环境（如风暴）会使摄食率低于平静环境下的摄食率，并会影响捕获和摄入的猎物类型。
Recent theoretical work suggests that small-scale turbulence enhances encounter rates between larval fish and their prey. This finding has been extended to suggest that feeding rates will increase in turbulent environments. However, this extrapolation assumes that turbulence has no detrimental effects on postencounter behaviors (e.g. pursuit success). We develop an analytical model to estimate the probability that larval fish feeding in turbulent environments successfully pursue encountered prey. We show that the overall probability of feeding is a dome-shaped function of turbulent velocity and that the height and location of the maxima depend on turbulence level and the behavioral characteristics of predator and prey. Highly turbulent conditions (e.g. storms) will reduce feeding rates below those which occur during calmer conditions and will affect the type of prey captured and ingested.