Wijayanto, Dian and Kurohman, Faik and Setyawan, Hendrik A and Kurnia, Dita Juni (2026) The Stock Analysis of Scarus psittacus Resources in the Karimunjawa Waters, Indonesia. International Journal of Agriculture and Biosciences, 15 (03): 1. pp. 1088-1094. ISSN eISSN: 2306-3599; pISSN: 2305-6622

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Abstract

Scarus psittacus, or the common parrotfish, has an ecological role in coral reef ecosystems. However, this species is also a target of artisanal fisheries, including in the Karimunjawa Islands, where expanding tourism has intensified demand for reef fish and heightened pressure on coastal resources. This research aims to assess the stock status of S. psittacus resources in the waters of the Karimunjawa Islands, including analyzing growth and mortality parameters. Data collection was carried out from July 2024 to May 2025 from 259 fish samples. The growth rates, recruitment peak, mortality, and exploitation level were measured using FiSAT II. The results showed that the length-weight relationship of S. psittacus fish in the Karimunjawa Islands was rather negative isometric (b=2.43). The first size caught (Lc50%) was 22.94cm TL, with a total infinite length (L∞) of 29.9cm TL. The peak recruitment period is estimated to occur in June-July. The exploitation rate of 0.18 indicates that the utilization of S. psittacus in Karimunjawa waters remains underexploited. Therefore, fish production can be increased by carefully applying environmentally friendly and sustainable management principles

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