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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)脉搏计数与对虾种群数量关系的量化·利用四个水听器和一台配备高速模数转换的计算机，研制了脉搏位置检测系统。利用该系统，我们在几个滩涂进行了实地调查。·与此同时，我们从田里收集虾，并计算巢穴的数量。·从这些调查中，我们可以开发出一个根据脉冲计数计算虾类数量的公式。(2)明确影响脉冲计数的环境因素，并建立一个量化关系的公式。·我们发现，每小时、每天和每周的波动都很小，天气状况不会对它们产生影响。·我们创建了一个公式来解释脉搏计数和水温之间的关系。·我们发现脉搏计数与缺氧或赤潮之间存在联系。发现砂质粉砂底部地区脉搏数差异不大，可以利用该方法比较不同位置的脉搏数情况。(3)对世界不同地区的脉搏数进行测量。·我们在日本和其他国家进行了实地调查。简单的测量设备帮助我们把它们带到了遥远的地方。·所谓的污染区域，如东京湾、伊势湾、赤塔湾等，脉搏计数比我们根据水温预测的要小。(4)作为底层生物环境状况的评价指标。·描述了用各种不同的设备进行脉搏计数的校准过程。·我们将能够通过比较从水温观测到的脉冲计数和预测的脉冲计数来评估环境状况。如果观测到的脉冲计数小于预测的脉冲计数，则可能发生了环境恶化。·至少，这种方法将能够应用于定点观测，以检测环境恶化。