Satellite-Based Sea Surface Temperature as A Determinant of Fish Abundance - A Case in The Maritime Zone of Bangladesh

Sea surface temperature (SST) is an important parameter in marine ecosystem studies as its relations of Fishery and other marine resources. In this study SST we have focused on the variation of SST among four fishing grounds and the relationship between SST and fish catch data. Fish catch data of November, 2022 was acquired from fishery logbook. Satellite derived VIIRS daily and monthly products have been used to derive thermal fronts in the maritime zone of Bangladesh. Research results indicated that the Sea surface temperature gradually changed from 24.4°C to 30.52°C among four fishing grounds. The results are showed that there are no significant differences (F3,44= 0.213, P = 0.00) of SST among the four fishing grounds. A very weak relationship was found between SST (26.52°C ≤SST≥ 29.21°C) and fish data. But a negative relationship was found when SST was from 27.88°C to 28.54°C. The results are shown a moderate relationship between SST (28.55°C≤SST≥29.21°C) and fish catch data. And a high moderate correlation was found between SST and fish catch in Middle grounds but very low correlation ship between SST and fish catch data was found in Swatch of No Ground. A further detailed investigation is required to the association of other parameters with SST variability and relationship between SST and fish abundance.

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