Locating tuna forage ground through satellite remote sensing
Locating tuna forage ground through satellite remote sensing
复制标题
通过卫星遥感定位金枪鱼饲料地
DOI：
10.1080/01431160902798387
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
K. Mali
中科院分区：
文献类型：
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作者：
B. Kumari;M. Raman;K. Mali
开发了一种技术，利用卫星得出的海洋颜色、水透明度和海面温度来评估金枪鱼生境。科学方法是基于金枪鱼的食物和喂养习惯以及适宜的温度范围。对印度遥感卫星P4-海洋颜色监测仪（IRS P4-OCM）的时间序列叶绿素a图像进行了分析，以确定浮游植物斑块的临界大小、持续性和最佳水透明度深度。利用美国国家海洋和大气管理局高级甚高分辨率辐射计（NOAA-AVHRR）的海表温度（SST）资料，研究了海洋周围沃茨的最佳温度范围。基于后报的结果表明，从卫星数据得出的金枪鱼饲料场产生了较高的金枪鱼渔获量（>2%的上钩率）。研究表明，一个浮游植物斑块成熟到饲料场至少需要5-7天的时间延迟。此外，为了便于视觉摄食，水的透明度应在25-30米深左右。观察到的热极限和优选温度范围分别为26-30°C和26-28°C。基于有限验证的初步结果非常有希望。不过，正在计划进行一次试验性预报，以验证这一方法。
A technique has been developed to assess tuna habitat using satellite derived ocean colour, water transparency and sea surface temperature. The scientific approach is based on the food and feeding habit and the preferential temperature range of tuna. Time series chlorophyll-a images of Indian Remote Sensing Satellite P4-Ocean Colour Monitor (IRS P4-OCM) have been analysed to define the critical phytoplankton patch size, its persistence and the optimal water transparency depth. Sea surface temperature (SST) data derived from National Oceanic and Atmospheric Administration-Advanced Very High Resolution Radiometer (NOAA-AVHRR) have been analysed to study the optimum temperature range in the surrounding waters. Results based on hindcasting indicate that the tuna forage ground derived from satellite data yielded high catch of tuna (>2% hooking rate). Study reveals that a minimum time delay of 5–7 days is required for a phytoplankton patch to mature to the forage ground. In addition, water transparency for facilitating sight feeding should be about 25–30 m depth. The thermal limit and preferential temperature range observed is 26–30°C and 26–28°C, respectively. Preliminary results based on limited validation are highly promising. However, an experimental forecast is being planned to validate this approach.