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Journal : Barakuda 45

Utilization of Mangosteen Extract to Enhance the Masculinization of Striped Snakehead (Channa striata) Fingerlings Mardika, Hanisya Putri Kania; Pramono, Taufik Budhi; Afiyah, Novia Nurul; Putra, Joni Johanda; Larasati, Lorichika Gustinda; Rohmah, Siti Nur
Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan Vol 7 No 2 (2025): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/barakuda45.v7i2.690

Abstract

Aquaculture technology to increase productivity includes sex reversal or masculinization. Masculinization of snakehead fish (Channa striata) is essential to balance the male sex ratio for sustainable aquaculture. One approach is the use of natural compounds to reduce dependence on synthetic hormones that are less environmentally friendly. Natural substances such as mangosteen peel extract (Garcinia mangostana) contain aromatase inhibitors. This study aimed to determine the optimal dosage of mangosteen peel extract for inducing sex reversal in snakehead fish. Two-week-old fry were immersed in different treatments (control 0 g/L, 0.5 g/L, 0.7 g/L, and 0.9 g/L) for 4 hours and reared for 2 months. Gonads were examined microscopically using aceto-carmine staining. Results showed that the highest male proportion was obtained at 0.9 g/L, while the highest survival rate was recorded at 0.7 g/L. The Kruskal–Wallis test (H=7.64; p=0.054) indicated no significant differences among treatments in male proportion. The Mann–Whitney U test (p=0.077) between control and each treatment confirmed that formal differences were not significant, although a trend of increased male proportion was observed across all treatments. One-way ANOVA (F=16.72; p=0.0008) demonstrated that treatment doses significantly affected survival. Tukey HSD revealed that all treatments differed significantly from control (p<0.05), while no significant differences occurred among treatment doses (p>0.05). In conclusion, doses of 0.5–0.9 g/L were effective in promoting masculinization while maintaining optimal survival in snakehead fish.
Local Wisdom Practices in Managing Fisheries Resources of the Klawing River Salsabila, Sahda; Junaidi, Teuku; Suweda Anggana Putera, I Gede; Pramono, Taufik Budhi; Situmorang, Sawitania Christiany Dwi Utami Boru; Windiarta, Talitha Putri; Putri, Indah Karunia; Rizkiana, Fidia Indah; Saprudin, Saprudin; Winarno, Gunardi Djoko
Barakuda 45: Jurnal Ilmu Perikanan dan Kelautan Vol 7 No 2 (2025): November
Publisher : Fakultas Perikanan dan Ilmu Kelautan Universitas 17 Agustus 1945 Cirebon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47685/barakuda45.v7i2.702

Abstract

The Klawing River plays an essential role as a source of livelihood for local communities and as a habitat for various fish species, yet it is increasingly under pressure from human activities and environmental changes. This study aims to identify the forms of local wisdom practiced by fishing communities in managing fishery resources and to assess their relevance to modern challenges. The research was conducted in five villages representing the upstream, middle, and downstream sections of the river using a qualitative descriptive approach through interviews and observations involving 40 respondents. The results show that local wisdom is reflected in the use of traditional fishing gear (nets, gillnets, fishing lines, paser, wuwu, and mijahan), the application of the pranata mangsa as a seasonal fishing guide, social solidarity among fishers, and the Gredug Sampah tradition focused on maintaining river cleanliness. These practices now face limitations due to climate change, the introduction of invasive species, and economic pressures. The declining accuracy of the pranata mangsa indicates the need to integrate traditional ecological knowledge with modern climatological information to enhance community adaptation to ecosystem dynamics. Therefore, the synergy between local wisdom and scientific approaches is crucial for achieving an adaptive and sustainable fishery resource management system in the Klawing River.