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Lagusia micracanthus , a species endemic to the freshwater systems of Sulawesi, Indonesia, was the subject of this study. The objective of the current research was to characterize the length-weight relationship (LWR) and condition factors of this fish. Sampling was conducted in the Ompo River, South Sulawesi, Indonesia, over a nine-month period from May 2018 to January 2019, utilizing electric fishing gear. Sample analysis was conducted in the fisheries laboratory, West Sulawesi University. The samples were measured with a digital calliper and dissected to determine their sex. A total of 146 specimens were collected, comprising 72 males and 74 females. Their total lengths (TL) ranged from 41.48 to 46.90 mm of total length (TL) and body weight (W) ranged from 1.60 to 1.80 g. The LWR of L. micracanthus in both rivers exhibited an isometric growth pattern (b = 3.0488, P <0.05). These findings indicate a high correlation in LWR (r > 95%). The relative condition factor was observed to range between 0.5423 and 1.6834, with females displaying better condition than males. The condition factor showed a decreasing trend as gonadal maturity progressed up to level III, followed by an increase at level IV maturity, and then a decrease again after spawning. This study offers fundamental data regarding the LWR and condition factors of L. micracanthus that can be used for fisheries management purposes.

The exploitation of Thunnus albacares represents a significant fishing activity in the Makassar Strait. This study aims to evaluate the productivity trends of yellowfin tuna fisheries and identify seasonal fishing patterns to support sustainable management strategies. The research utilizes a survey method, conducting field data collection from August to December 2022 and analyzing time-series production data from 2007 to 2022, specifically focusing on catches landed by tuna handline units. Data were analyzed using standardized Catch Per Unit Effort (CPUE) to assess stock abundance trends, while the Fishing Season Index (FSI) was calculated using the moving average method to determine temporal fluctuations. The results indicate that CPUE declined steadily from 2007 to 2022, pointing to possible overexploitation. The FSI analysis reveals that the highest catches occur during the first transitional period (March–May) and the eastern season (June–July), with moderate activity between January–February and August–November, and the lowest activity in December. These findings highlight the need for careful monitoring and management of yellowfin tuna fisheries to support long-term sustainability and resource efficiency in the Makassar Strait.

Batetangnga River is one of the rivers in West Sulawesi and is well known as an ecotourism area. This preliminary study was performed to reveal fish fauna in the Batetangnga River, West Sulawesi. Ichthyofauna research was conducted in April and May 2021 at two stations in Batetangnga River, namely Rawa Bangun and Butute’neng. During the study period, a total of 14 species belonging to 9 families were identified. No endemic species were found in the study area. Native fish species such as Stiphodon semoni, Butis butis, Glossogobius sp., Glossogobius aereus , Stiphodon sp., Giuris sp, Atule sp. Ambassis miops, Ambassis interrupta, Microphis sp. were recorded. Four alien fishes species were documented i.e. Aplocheilus panchax, Poecilia reticulata, Anabas testudineus , and Oreochromis niloticus . Freshwater fish exploration and efforts to control alien fishes species in west Sulawesi are essential things to be done shortly.

The present study aimed to determine the length-weight relationship and condition factor of flying fish Hirundichthys oxycephalus. This study was carried out monthly from October 2021 to March 2022 in Majene waters, West Sulawesi, Indonesia. A total 407 of samples were used during study period which consisted of 236 male fish and 171 female fish. Samples were analyzed in the Integrated Laboratory of Fisheries Department, West Sulawesi University. A digital caliper with 0.1 mm accuracy was used for the total length measurement and weight was measured using a digital balance with an accuracy of 0.01 g. A linear allometric model (LAM) was applied for length-weight relationships and the condition factor (K) analysis was performed to evaluate the fish condition. The length- weight relationship of male and female fish had a strong correlation with the equations W = 0.0024L2'0153, W = 0.0021L2,0468, W = 0.0023L2,0258 consecutively. The growth pattern of H. oxycephalus was allometric negative for both male and female fish. The condition factor of fish is in a good condition and the value of K of male fish was lower than female fish. These findings suggest that the data from this study can be used as a reference for fisheries biologists in future studies for assessment of the flying fish.

The present study aimed to determine different planting distances on the growth of Kappaphycus Alvarez using the longline method. The present study was conducted from September to October 2018 in Mandar Bay, West Sulawesi. Water quality measurement was performed in situ during the study period, including temperature, salinity, pH, turbidity, and water current and data collected on the specific and absolute growth of seaweed. Prior to study, buoys, rope, length measurement device, and anchor were prepared for seaweed cultivation. The long-line method was applied for seaweed cultivation, and the seed of Seaweed Kappaphycus alvarezii obtained from local seaweed farmers. A total of 10 stretches rope using different planting distance of 15 cm (P1), 30 cm (P2), 45 cm (P3), and 60 cm (P4). The cultivation was carried out for 5 weeks. The results showed that the highest specific growth rate and absolute growth were obtained from P3 in which the absolute growth reached 165 gr, and the specific growth rate was 0.14%, respectively. This finding suggested that different planting distance affects the growth of seaweed. In addition, the environmental parameters for seaweed cultivation were still considered in optimum condition for cultivation.