The Relationship between Sea Surface Temperature and Chlorophyll-a Concentration on Mackerel Fish (Rastrelliger kanagurta, Cuvier 1816) Catch Results on Sea Waters of Bengkulu City

Dhea Ramadanti; Jabang Nurdin; Rita Maliza

doi:10.29303/jbt.v25i4.9930

The Relationship between Sea Surface Temperature and Chlorophyll-a Concentration on Mackerel Fish (Rastrelliger kanagurta, Cuvier 1816) Catch Results on Sea Waters of Bengkulu City

Authors

Dhea Ramadanti , Jabang Nurdin , Rita Maliza

DOI:

10.29303/jbt.v25i4.9930

Published:

2025-10-17

Issue:

Vol. 25 No. 4 (2025): in Progress

Keywords:

Abundance, Chlorophyll-a, Mackerel fish, SST

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Ramadanti, D., Nurdin, J., & Maliza, R. (2025). The Relationship between Sea Surface Temperature and Chlorophyll-a Concentration on Mackerel Fish (Rastrelliger kanagurta, Cuvier 1816) Catch Results on Sea Waters of Bengkulu City. Jurnal Biologi Tropis, 25(4), 5743–5749. https://doi.org/10.29303/jbt.v25i4.9930

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Abstract

This study investigates the relationship between sea surface temperature (SST) and chlorophyll-a concentration in relation to the catch results of mackerel fish (Rastrelliger kanagurta) in Pulau Tikus Beach, Bengkulu City. Remote sensing data from the Aqua MODIS satellite sensor were analyzed over a 12-month period (May-April 2025) to assess monthly fluctuations in SST and chlorophyll-a as indicators of marine productivity. SST values ranged from 28.9°C to 31.2°C, matching the optimal thermal range for mackerel spawning. Chlorophyll-a concentrations ranged from 0.5 to 3.4 mg/m³, indicating a high abundance of phytoplankton and biologically fertile waters. Fishing coordinate data showed that the highest mackerel catches occurred around Pulau Tikus, with Robin-type boats operating approximately 7-8 nautical miles offshore. The relationship between SST and chlorophyll-a revealed that increasing SST was associated with elevated chlorophyll-a levels at depths of 8-15 meters, thereby increasing the probability of mackerel presence.

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The Relationship between Sea Surface Temperature and Chlorophyll-a Concentration on Mackerel Fish (Rastrelliger kanagurta, Cuvier 1816) Catch Results on Sea Waters of Bengkulu City

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