DEVELOPMENT OF A FISHERY CULTIVATION MODEL AS A MINATOURISM OBJECT IN SUMBERKIMA VILLAGE, GEROKGAK DISTRICT, BULELENG

TARISSA AZZAHRA AZHAR, Made Dwipa Kusuma Maharani, I Nyoman Dodik Prasetia — Tue, 18 Aug 2026 00:00:00 +0800

Sumberkima Village, Gerokgak District, Buleleng Regency has fishery cultivation potential in the form of floating net cages (KJA) as well as coastal ecosystems that support minatourism development. This study aims to determine the fishery cultivation potential that can be developed into a minatourism object and to design a sustainable fishery cultivation development model to support minatourism in Sumberkima Village. The study used a Research and Development (R&D) approach with the ADDIE model, involving 77 respondents determined using the Slovin Formula, consisting of aquaculture business actors, local minatourism managers, village officials, and tourists. Data were analyzed using multiple linear regression and SWOT (IFAS-EFAS) analysis. The results showed that fishery cultivation potential (X1) and community participation (X3) had a positive and significant effect on minatourism development (Y), while supporting facilities (X2) had no significant effect, with a coefficient of determination (R2) of 0.761. The SWOT analysis placed Sumberkima Village in Quadrant I with coordinate point (0.85 ; 1.05), indicating that an aggressive (SO) strategy is the most appropriate strategy to apply. The recommended development model integrates local potential, supporting facilities, and community participation, while still considering environmental, economic, and social sustainability aspects. Minatourism; Sumberkima Village; SWOT

PRODUCTIVITY OF HYBRID GOLDFISH (Carassius auratus) HATCHERIES USING THE SMART-K MODEL

Hamdan Agustiawan, Ujang Dindin, Neneng Nurbaeti, Syifa Dilla Nafisa — Tue, 18 Aug 2026 00:00:00 +0800

The productivity of hybrid goldfish (Carassius auratus) hatcheries remains relatively low due to non-standardized hatchery management, particularly in broodstock management, larval rearing, and water quality control. This study aimed to analyze the effect of implementing the SMART-K model (Technology and Partnership-Based Aquaculture Management System) on the productivity of hybrid goldfish hatcheries. The study was conducted from November to December 2025 at hatchery ponds located in Cicantayan, Nagrak Cisaat, and Cimenteng, Sukabumi Regency. A quantitative approach was applied by comparing fry productivity before and after the implementation of the SMART-K model in the same hatchery units. Observed parameters included fry productivity at the end of the rearing cycle and water quality parameters, namely temperature, pH, and dissolved oxygen (DO). Data were analyzed descriptively and further examined using a paired t-test. The results showed that the average fry productivity increased from 3.61 liters before SMART-K implementation to 15.72 liters after implementation, with a statistically significant difference (p < 0.05). The application of the SMART-K model had a significant effect on improving the productivity of hybrid goldfish hatcheries.

THE EFFECTIVENESS OF THE USE OF AQUAPONIC SYSTEMS USING CHITOSAN FILTERS ON WATER QUALITY IN AMMONIA, NITRITE, AND NITRATES TEST PARAMETERS

I Gede Satriya Wibawa, Ni Nyoman Dian Martini, Kadek Lila Antara — Tue, 18 Aug 2026 00:00:00 +0800

Chitosan is a polysaccharide compound derived from chitin obtained from marine animal shell waste and can act as a biocoagulant and bioflocculant in maintaining water quality. This study aims to determine the effectiveness of chitosan with different concentrations in improving water quality as seen from the content of ammonia, nitrite, and nitrates in the aquaponic system. This study was carried out for 30 days in Banjar Tegal Village, Buleleng District, Buleleng Regency, Bali Province using a Complete Random Design (RAL) with three treatments and three replicas. The treatments used include A (Aquaponic system without chitosan filter), B (Aquaponic system with the addition of chitosan filter with a dose of 30 mg/L), C (Aquaponic system with the addition of chitosan filter with a dose of 50 mg/L). Data was collected using a simple random sampling method and analyzed using quantitative and qualitative descriptive data analysis techniques. The results showed that the water quality performance (ammonia, nitrite, and nitrate test parameters) of the aquaponic system in the treatment of adding chitosan filters with a concentration of 50 mg/L (Treatment C) was better when compared to the control and with the treatment of adding chitosan filters with a concentration of 30 mg/L.

ANALYSIS OF LEAD (Pb) AND COPPER (Cu) CONTENT IN Gracilaria sp. SEAWEED FROM THE COASTAL WATERS OF SUMBERKIMA VILLAGE

Aprilia Cece, I Nyoman Dodik Prasetia, Made Dwipa Kusuma Maharani — Tue, 18 Aug 2026 00:00:00 +0800

SHRIMP FARM EFFLUENT TO COASTAL MICROBIOMES AND ITS IMPLICATIONS FOR WATER QUALITY AND PATHOGEN PROLIFERATION

Tue, 18 Aug 2026 00:00:00 +0800

Shrimp aquaculture faces significant challenges from disease outbreaks and environmental degradation caused by cultivation waste. This study aims to characterize the indicator bacteria communities in the coastal areas surrounding shrimp farms and to evaluate their correlation with water quality parameters as a tool for monitoring ecosystem health. This research employed a descriptive-observational approach and conventional cultivation on selective media, including Thiosulfate-Citrate-Bile Salts-Sucrose (TCBS) Agar and Pseudomonas Isolation Agar, to quantify the abundance of Vibrio spp. and Pseudomonas spp., respectively, alongside Marine Agar. Measurements of water quality parameters such as temperature, salinity, pH, dissolved oxygen (DO), nitrate, nitrite, and ammonia were also integrated for correlation analysis. The analysis revealed that aquaculture effluent significantly increased the abundance of total heterotrophic bacteria and Vibrio spp. in the coastal waters receiving farm waste. The abundance of Vibrio was positively correlated with temperature and pH, and negatively correlated with dissolved oxygen. Bacterial communities, including Vibrionaceae and Pseudomonadaceae, were identified as core components of the microbiome in waters exposed to anthropogenic waste. Fluctuations in environmental parameters trigger shifts in these bacterial communities, elevating the risk of pathogen and toxin presence. These findings underscore the importance of monitoring indicator bacteria for sustainable farm management, mitigating disease risks, and ensuring the suitability of coastal waters as a viable medium for aquaculture.

NUTRIENTS FROM Avicennia alba AND Rhizophora mucronata IN MANGROVE AND CRAB CONSERVATION AREA, TARAKAN CITY

Mon, 10 Aug 2026 00:00:00 +0800

Mangrove ecosystems exhibit high productivity resulting from the decomposition of litter, which contains various nutrients such as carbon, nitrogen, and phosphorus that benefit both the mangrove plants themselves and the surrounding aquatic ecosystems. This study aims to determine the nutrient content (carbon, nitrogen, and phosphorus) of decomposed litter from Avicennia alba and Rhizophora mucronata. The study was conducted in the Tarakan City Mangrove and Crab Conservation Area, North Kalimantan, from April to June 2026, using a quantitative method with a descriptive-exploratory approach, taking into account the characteristics of the dominant mangroves at three study sites. The results showed that the decomposition rate of A. alba mangrove litter ranged from 0.22 to 0.64 grams/day and that of R. mucronata ranged from 0.25 to 0.67 grams/day; furthermore, no leaf litter from either A. alba or R. mucronata decomposed 100%. The carbon content of A. alba ranged from 9.45% to 13.45%, nitrogen from 0.64% to 0.72%, and phosphorus 0.25% to 0.29%, while the carbon content of R. mucronata ranged from 21.50% to 22.45%, nitrogen from 0.58% to 0.83%, and phosphorus from 0.06% to 0.009%. The values of the physical and chemical parameters of the water still support the decomposition process of litter.

THE ROLE AND IMPACT OF THE DWI TIRTO MULYO COOPERATIVE ON EMPOWERING PARTICIPATION AND THE SOCIO-ECONOMIC CONDITIONS OF MEMBERS OF KALIGRENJENG VILLAGE, BLITAR

Nazuwa Ayuni, Uswatun Nisa Andini, Razita Marsya Ristanti, Mariyana Sari — Mon, 10 Aug 2026 00:00:00 +0800

This study aims to analyze the role and impact of the Dwi Tirto Mulyo Cooperative on empowering participation and the socio-economic conditions of members in Kaligrenjeng Village, Blitar Regency. This research uses a qualitative descriptive method with data collection techniques including observation, interviews, questionnaires, and documentation. The results show that the cooperative has a significant positive impact on members’ socio-economic conditions, indicated by improvements in employment (89%), income (98%), and access to capital (86%), all categorized as agree. Member participation is categorized as high in decision-making (94.74%), implementation (93.66%), benefit utilization (96.36%), and supervision (83.64%). Furthermore, the cooperative’s role in member empowerment is categorized as very high with an average of 94.13%. Overall, the cooperative has effectively improved members’ welfare, although improvements are still needed in supervision and financial service development.

THE EFFECT OF DIFFERENT TYPES OF BAIT ON THE CATCHES OF MANGROVE CRABS (Scylla serrata) USING FOLDING TRAP FISHING GEAR IN THE WATERS OF TANJUNG PECINAN MANGARAN DISTRICT SITUBONDO REGENCY

Diana Kamila Putri, Yusrudin Yusrudin, Sumaryam Sumaryam — Mon, 10 Aug 2026 00:00:00 +0800

This study was conducted to assess the effect of different bait types on the catch of mangrove crab (Scylla serrata) using a collapsible trap in the waters of Tanjung Pecinan, Mangaran District, Situbondo Regency. The purpose of this study was to determine the effect of bait type on mangrove crab catches. This study used a Randomized Block Design (RBD) method which included 3 treatments and 9 fishing trips. The bait types used were trash fish, field snails, and shrimp. Ten collapsible traps were used for each treatment, randomly spaced 5 meters apart. Additionally, supporting parameters included water quality, waves, current speed, temperature, and tides. Data were analyzed using SPSS with normality tests, homogeneity tests, ANOVA tests, and LSD tests. The data analysis concluded that trash fish and shrimp baits yielded better catches than golden apple snails.

ANTIBACTERIAL ACTIVITY OF Sargassum sp. IN INHIBITING Vibrio sp. ISOLATED FROM CANTANG GROUPER (Epinephelus fuscoguttatus x Epinephelus lanceolatus)

Mon, 10 Aug 2026 00:00:00 +0800

Treatment of vibriosis using natural ingredients such as Sargassum sp. extract in cantang grouper cultivation activities needs to be studied. Testing the effectiveness of solvents in producing phytochemical compounds as antibacterials and modifying the extraction process to make it simpler aims to be replicated by farmers in the field. The tested bacterial isolates were isolated directly from cantang grouper fish showing symptoms of vibriosis from fish farmers in Senggarang Besar, Tanjungpinang City. Testing the antibacterial activity of Sargassum sp. extract in inhibiting the growth of Vibrio sp. was carried out through an inhibition zone test using the paper disc diffusion method (Kirby-Bauer method). The results showed that the use of 70% alcohol solvent in the extraction process resulted in a clearer and better inhibition zone diameter of 13 mm at the highest treatment concentration (10%) compared to the extract using 96% alcohol solvent at the same concentration of 11.67 mm. It should be noted that the inhibition zone formed is classified as partial because it is not clear or completely clear due to the presence of thin bacterial growth in the zone even though the circle shape of the inhibition zone is quite clear. The use of 70% alcohol solvent can be used for the extraction process of Sargassum sp. considering that it is cheaper and the results are better than 96% alcohol based on the results shown through this study.