The exploitation status of white-streaked grouper (Epinephelus ongus) in Karimunjawa waters

Wijayanto, Dian and Kurohman, Faik and Wibowo, Bambang and Dewi, Dian Ayunita Nurmala Nugraheni and Aprijanto, Aprijanto and Irfani, Muhammad and Santosa, Muhammad Alfan (2025) The exploitation status of white-streaked grouper (Epinephelus ongus) in Karimunjawa waters. Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society, 18 (2): 1. pp. 744-752. ISSN 1844-9166

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Abstract

This field research examined the level of exploitation of white-streaked grouper (Epinephelus ongus) in the waters of the Karimunjawa Islands from July 2024 to January 2025. In this research, growth, mortality and exploitation rates were analyzed from 388 systematically sampled fish (10% of the population caught by fishermen). The initial average size of white-streaked grouper fish caught was 19.95 cm TL (total length), and the highest recruitment occurred in November. This research revealed an exploitation rate of 0.37, implying that the exploitation rate of white-streaked grouper in the waters of the Karimunjawa Islands was categorized under-exploited. The sustainable production was estimated below 12,290 kg per year, equivalent to IDR 737,399,094 at an average price of IDR 60,000/kg.

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