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Bioecological parameters and exploitation of yellow boxfish Ostracion cubicus in Wallace Line, Makassar Strait, Indonesia
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Bioecological parameters and exploitation of yellow boxfish Ostracion cubicus in Wallace Line, Makassar Strait, Indonesia
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Journal Article
Bioecological parameters and exploitation of yellow boxfish Ostracion cubicus in Wallace Line, Makassar Strait, Indonesia
2025
Overview
A thorough understanding of bioecological characteristics and levels of exploitation is necessary for both the conservation of marine biodiversity and sustainable fisheries management. The yellow boxfish, Ostracion cubicus, is the subject of this study because it is valuable economically and plays a crucial ecological role in coastal habitats. O. cubicus is a boxfish with a wide distribution in the world's coral reef ecosystems. This study aims to examine the bioecological parameters and exploitation of O. cubicus. O. cubicus samples were collected from fishermen's catches landed at the Paotere Fish Landing, Makassar city. Fishermen catch O. cubicus in the Liukang Kalmas waters, Makassar Strait. O. cubicus samples were taken every mid-month from August 2022 to October 2023. The parameters measured were morphometric-meristic parameters, and total weight. O. cubicus shows sexual dimorphism where female fish have larger eye width, mouth opening width, head length, tail stem length, feed weight, intestine weight, and fish weight to feed weight ratio than male fish. O. cubicus can reach a total length of 39.9 cm. O. cubicus has a relatively slow growth rate (0.180) with a smaller growth performance index (2.46) when compared to fish with flat bodies. The average length at first catch (Lc) was 24.0 cm. O. cubicus was completely subsumed to capture fisheries (L100) at a size of approximately 28.0 cm. The total, natural, and capture mortality rates were 3.30, 1.89, and 1.41, respectively. The exploitation rate and growth performance index were 0.43 and 2.46, respectively. O. cubicus became susceptible to fishing gear at a size of 26.5 cm. Although there is still potential to increase catches because there has been no apparent acceleration in fishing mortality, the exploitation rate is still below 0.5, and the catch per recruit is relatively low (0.02); increasing the exploitation rate must be done carefully because the growth rate is slow. The recommended catch size is above 24 cm.
