Study on Evaluation Method of Shallow Sea Environment by Counting the pulse sound of Snapping Shrimps

统计鳄虾脉搏声评价浅海环境方法的研究

基本信息

批准号：
11480142
负责人：
SEKINE Masahiko
金额：
$ 5.7万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

(1) Quantifying the relation between pulse counts and shrimp population ・ We developed the pulse location detection system using four hydrophones and a computer equipped with high speed analog-digital converted. By using the system, we conducted field surveys in several tidal marshes. ・ In the same time, we collect shrimps from the field and counted the number of nest holes. ・ From those surveys, we could develop a formula to calculate the shrimp population from pulse counts.(2) Making clear the environmental factors that affect pulse counts, and create a formula that quantify the relationship. ・ We showed that the hourly, daily, and weekly fluctuations are small and weather condition didn't affect them. ・ We created a formula which explains the relation between pulse counts and water temperature. ・We found a relation between pulse counts and hypoxia or red tide. ・ We found that the difference of pulse counts are not large among sandy silt bottom areas, thus, this method would be able to use to compare the condition of different locations.(3) Measuring the pulse counts in various areas in the world. ・ We conducted field surveys in Japan and foreign countries. The simple measuring equipments helped us to carry them to the distant locations. ・ So called polluted areas, such as Tokyo bay, Ise bay, Chita bay, etc., the pulse counts were smaller than that we predicted from the water temperature.(4) Evaluation as an index of environmental condition for bottom living organisms. ・ We described the calibration procedure to count the pulse with various different equipments. ・ We would be able to evaluate the environmental condition by comparing the observed pulse counts and predicted pulse counts from water temperature. If the observed pulse counts are smaller than the predicted ones, environmental deterioration might be happening. ・ At least, this method would be able to apply to a fixed point observation to detect environmental deterioration.

（1）量化脉冲计数与收缩种群之间的关系・我们使用四个言语和一台配备了高速模拟数字转换的计算机开发了脉冲位置检测系统。通过使用该系统，我们在几个潮汐沼泽中进行了现场调查。・同时，我们从田间收集收缩并计算巢孔的数量。・从这些调查中，我们可以开发一个公式来计算脉冲计数的收缩池。（2）清除影响脉冲计数的环境因素，并创建一个量化关系的公式。・我们表明，每小时，每天和每周的波动很小，天气状况不会影响它们。・我们创建了一个公式，该公式解释了脉冲计数与水温之间的关系。・我们发现脉搏计数与缺氧或红潮之间存在关系。・我们发现脉冲计数的差异在沙质淤泥底部区域之间并不大，因此，该方法可以用来比较不同位置的状况。（3）测量世界各个区域的脉冲计数。・我们在日本和国外进行了现场调查。简单的测量设备帮助我们将它们带到遥远的位置。・所谓的污染区域，例如东京湾，Ise湾，Chita湾等，脉冲计数小于我们从水温中预测的脉冲计数。（4）评估是底部生物体的环境条件指数。・我们描述了用各种不同设备计数脉冲的校准程序。・我们将能够通过比较观察到的脉冲计数和从水温预测的脉冲计数来评估环境条件。如果观察到的脉冲计数小于预测的计数，则可能会发生环境确定。・至少，此方法将能够应用于固定点观察以检测环境确定。