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
DOI:
10.29303/jbt.v25i4.9930Published:
2025-10-17Downloads
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.
Keywords:
Abundance Chlorophyll-a Mackerel fish SSTReferences
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