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Determination of Chlorophyll-A in Relation to Sea Surface Temperature and Shoreline Distance to Explore the Fisheries Potentiality in The Northern Bay of Bengal, Bangladesh

Afifat Khanam Ritika
Bangladesh Institute of Maritime Research and Development

Keywords: MPA, Ecosystem, Conservation, Governance,


The identification of potential fishing zones is crucial in improving the efficiency and sustainability of fishing activities. Through scientific methods like remote sensing and oceanographic data, it is possible to locate areas with high fish abundance considering favourable conditions for fish growth and reproduction. In this regard, the use of Sea Surface Temperatures (SST) and the spread of Chlorophyll-a (Chl-a) through in situ data can help to identify fishing potentiality in different areas of the Bay of Bengal (BoB). This information can guide fishing activities to the most productive areas, reducing the time and cost involved in searching for fish while avoiding overfishing in areas where fish populations is already under pressure. An attempt was made with regards to identify the fisheries potentiality in northern part of the BoB using in situ sea surface data of Chl-a in relation to SST and shoreline distance. The study aimed to determine fishing potentiality and improve the sustainability of fishing efforts and fisheries production. The study was conducted in Feb and March of 2020, 2021, and 2022, and the results showed that Chl-a concentration ranges from 3.16 mg/l to 6.15 mg/l, with SST ranging from 22.45°C to 25.88°C. Shoreline distance covered 0.0 up to 60 nm during the research. The study found that Chl-a concentration increased with the decrease of SST and shoreline distance. Sampling blocks near the shoreline were more productive than those with higher shoreline distance and SST. This productivity is may be driven by inputs of nutrients from rivers and vertical mixing due to coastal currents. Despite climate change and environmental pollution, the Chl-a concentration in the northern Bay is still higher than the minimum level of 0.3mg/l, which is considered a good water body for fish availability. Thus, the study provided valuable information on fishing potentiality in the northern Bay of Bengal, which can be used to improve the efficiency and sustainability of fishing activities. 


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Determination of Chlorophyll-A in Relation to Sea Surface Temperature and Shoreline Distance to Explore the Fisheries Potentiality in The Northern Bay of Bengal, Bangladesh