Abstract
The fishing ground is identical and closely related to chlorophyll-a abundance in the waters, associated with its fisheries potential. This research has been conducted to determine the concentration and distribution of chlorophyll-a in the seas, especially in the Fisheries Management Area (FMA) 712 encompassing the Java Sea. The analysis used monthly time-series data collected from the satellite imagery over the last 11 years, taken through the ERDDAP website. The mean concentration of chlorophyll-a in the study area was 1.13 mg/l in June 2013. Based on 11 years of data processing, it can be concluded that the highest concentration of chlorophyll-a occurred in the west monsoon season from November to April, where increased rainfall caused the nutrient wash from terrestrial to the open waters. The lowest chlorophyll-a concentration happened in the east monsoon season from April to November, where the dry season arrived. The existence of pelagic fishes in FMA 712, such as Sardinella Lemurs and Sardinella Fimbriata, in waters highly influenced by the chlorophyll-a concentration, while Thunnus Sp. and Exocoetidae Sp. not affected significantly to the existence of chlorophyll-a concentration and its distribution.
Highlights
Indonesia is an archipelagic country with a vast natural resources area with high potency and diverse biological natural resources
Fisheries Management Area (FMA) 712 encompass the Java Sea, which is administratively located in the north, adjacent to several provinces in Borneo such as West Borneo Province, Central Borneo Province, and South Borneo Province, while in the south bordering Java Island, which includes Banten Province, West Java Province, DKI Jakarta Province, Central Java Province, and East Java Province
3.2 Changes in Chlorophyll-a Concentration Chlorophyll-a is one of the pigments contained in phytoplankton that plays a role in the photosynthesis process, which can be used as an indicator of water quality and fertility in a region based on its concentration [12]
Summary
Indonesia is an archipelagic country with a vast natural resources area with high potency and diverse biological natural resources. If adequately and appropriately managed, it can benefit the welfare of Indonesia, mainly fishermen [1]. Fisheries Management Area (FMA) is an operational area for managing and utilizing the fisheries sector potency in Indonesian waters. FMA 712 covers the Java Sea area, which has enormous capture fisheries potency, especially maratime. Indonesian fishing activities in FMA 712, in the Java Sea, are concentrated on the north coast of Java [2]. The Ministry of Marine Affairs and Fisheries [3] found that the condition of fisheries natural resources in FMA 712 has been considered overexploited and overfished based on pressure from small fisheries vessels in the coastal region [4]
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