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Multiple ocean parameter-based potential fishing zone (PFZ) location generation and validation in the Western Bay of Bengal

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Abstract

A new conceptual framework based on satellite data, including chlorophyll (CHL), sea surface temperature (SST) fronts, relative winds, current vectors, Ekman transport, and eddies, has been developed to identify potential fishing zones (PFZ) in the Bay of Bengal (BoB). The framework aims to provide persistent forecasts, even under cloudy conditions, based on feature propagation. The validation of the PFZ was carried out using fish catch data collected by the Fishery Survey of India (FSI) between 2016 and 2018. Hooking rates (HR) from longlines and catch per unit effort (CPUE) from trawl nets were used to analyse the data points in hook rate categories (1.0–3.0 and > 3.0) and CPUE categories (50–100 kg and > 100 kg) and interpret them with the PFZ maps. The analysis showed that the high fish catch locations were consistent with persisting features in the BoB, such as high chlorophyll patches, SST fronts, and cyclonic eddies. The high fish catch locations based on hook rate and high CPUE were found to be collocated with the high chlorophyll persisting features and thermal gradients in the BoB. The regression analysis shows that availability of the food (CHL) had the strongest correlation with fish catch, followed by the comfort condition (fronts and eddies).

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Data availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors are thankful to Director SAC and Head OSD and MED for necessary guidance for carrying out the work. The fish catch data received from Fishery Survey of India, Mumbai; Central Marine Fisheries Research Institute, Chennai; Annamalai University and Chilika Development Authority are sincerely acknowledged as part of the SAC TDP ‘SAMUDRA’ Program. The authors also thankful to the anonymous reviewers for their critical comments and suggestions to improve the quality of the journal.

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Conceptualisation and methodology: M. Jishad, Rashmi Sharma; funding acquisition, project administration and supervision: Rashmi Sharma, M. Jishad, R. K. Sarangi; resources and software visualisation and writing—original draft: M. Jishad; writing—review and editing: M. Jishad, R. K. Sarangi; all authors contributed in the in situ data collection.

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Correspondence to M. Jishad.

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Sarangi, R.K., Jishad, M., Sharma, R. et al. Multiple ocean parameter-based potential fishing zone (PFZ) location generation and validation in the Western Bay of Bengal. Environ Monit Assess 196, 98 (2024). https://doi.org/10.1007/s10661-023-12259-6

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