Validation of integrated potential fishing zone (IPFZ) forecast using satellite based chlorophyll and sea surface temperature along the east coast of India
Validation of integrated potential fishing zone (IPFZ) forecast using satellite based chlorophyll and sea surface temperature along the east coast of India
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DOI：
10.1080/01431160600987878
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发表时间：
2007-01-01
影响因子：
3.4
通讯作者：
Sahu, S. K.
中科院分区：
文献类型：
--
作者：
Choudhury, S. B.;Jena, B.;Sahu, S. K.
在利用卫星获取的海洋表面温度和叶绿素共同协助印度东海岸渔业方面进行了一次尝试。关于锋面、涡旋、漩涡、洋流和卫星产生的上升流等特征的信息在渔业中很有用，因为鱼类通常聚集在这些地区觅食。海温和叶绿素浓度分别由NOAA-AVHRR(NOAA高级甚高分辨率辐射计)和IRS-P4OCM(OCM-海洋颜色监视器)传感器反演出。从SST和叶绿素数据中提取特征，并将这些特征传输到被称为综合潜在捕鱼区(IPFZ)的比例尺底图上。利用维萨卡帕特南基地的印度渔业调查(FSI)渔船来验证所建议的IPFZ。这次演习是在2002年11月、2003年3月、2003年4月和12月以及2004年1月期间进行的。每单位努力的分类渔获量(CPUE，总渔获量除以实际捕捞小时)方面的反馈以及从FSI、Visakhapatnam获得的位置信息已纳入IPFZ图像。单位努力渔获量(CPUE)是用总渔获量除以实际捕捞小时来计算的。验证结果表明，与周边地区相比，IPFZ地区的CPUE较高。在大多数情况下，除2004年1月外，在印度东海岸IPFZ通报地区观察到的渔获量增加超过一个数量级。2004年1月期间，在建议的IPFZ地区观察到略有增加。
An attempt was made with regards to the application of satellite-derived sea surface temperature (SST) and chlorophyll together in assisting the fishing industry located along the east coast of India. Information on features such as fronts, eddies, gyres, currents and upwelling derived from satellites is useful in fisheries, since fishes usually congregate in these areas for feeding. SST and chlorophyll concentration are retrieved from NOAA-AVHRR (NOAA advanced very high-resolution radiometer) and IRS-P4 OCM (OCM-ocean colour monitor) sensor respectively. Features are extracted from the SST and chlorophyll retrievals and these features are transferred onto a scaled base map called an ' integrated potential fishing zone (IPFZ)' map. Fishery Survey of India (FSI) fishing vessels of Visakhapatnam base were used to validate the suggested IPFZs. This exercise was conducted during November 2002, March, April and December 2003 and January 2004. The feedback in terms of categorized fish catch per unit effort (CPUE, total catch divided by actual fishing hours) along with location information obtained from FSI, Visakhapatnam has been incorporated in the IPFZ image. The catch per unit effort (CPUE) is computed taking total catch divided by actual fishing hours. The validation shows that the CPUE is high in the IPFZ areas compared with surroundings. In most of the cases, except January 2004, more than an order increase in fish catch is observed in the IPFZ notified areas along east coast of India. A marginal increase is observed in the suggested IPFZ areas during January 2004.