5 January 2001 Vertical distribution of phytoplankton by satellite data and its application to fisheries
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Abstract
Objectives of this study are to apply the integrated chlorophyll estimation method to time-series satellite ocean color data and to examine the characteristics of the fishing ground formation and its marine environment for three kinds of fisheries, including purse seine fisheries, pole and line fisheries, and longline fisheries. The MCSST image and the chlorophyll image of ADEOS/OCTS from April to June 1997 were used for the water types classification using clustering method with non-supervisor. We defined water types to four categories of Kuroshio, Warm Water, Cold Water, Oyashio. Warmer water area (Kuroshio, Warm Water) and colder water area (Oyashio, Cold Water) might be clearly separated. Warm Water Area, however, has less separation rate of only 58 percent. On the other hand, Cold Water Area has relatively high separation rate of 83 percent. The comparison between the fishing catches and both SST and integrated Chlorophyll (alpha) was carried out to generate 3-D scattergrams for each fisheries. The relatively high part of longline fishing catch with over 200 fishes was formed on the range of SST 15 degrees Celsius - 25 degrees Celsius and the range of integrated chlorophyll (alpha) 60 - 150 mg/m2. The relatively high part of pole and line fishing catch with over 10 ton was formed on the range of SST 12 degrees Celsius - 22 degrees Celsius and integrated chlorophyll (alpha) under 60 mg/m2. The relatively high part of purse seine fishing catch with over 50 ton was formed on the range of SST over 20 degrees Celsius and the range of integrated chlorophyll (alpha) 50 - 200 mg/m2.
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Katsuya Saitoh, Sei-ichi Saitoh, Tameishi Hideo, "Vertical distribution of phytoplankton by satellite data and its application to fisheries", Proc. SPIE 4154, Hyperspectral Remote Sensing of the Ocean, (5 January 2001); doi: 10.1117/12.411671; https://doi.org/10.1117/12.411671
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