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M.Khairul Anam
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Grouper: Jurnal Ilmiah Perikanan
Published by Universitas Islam Lamongan
ISSN : 20868480     EISSN : 27162702     DOI : https://doi.org/10.30736/grouper.v10i2
Core Subject : Health, Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Veterinary
Jurnal GROUPER menyediakan publikasi ilmiah dan menyebarluaskan artikel asli dan berkualitas yang berhubungan dengan disiplin ilmu perikanan yang meliputi: Pengelolaan Sumber Daya Perairan, Pengelolaan Wilayah Pesisir, Pengendalian Pencemaran Perairan, Kebijakan Pembangunan Perikanan, Agrobisnis Perikanan, Sosial Ekonomi Perikanan, Penyuluhan Masyarakat Perikanan.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 225 Documents
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Bacterial Abundance and Identification in Recirculating System of Sumatran Barb Fish Rearing Media with Duckweed as Biofilter Dita Wisudyawati; Ardha Nur Mustofa; Fajri Rahman Afif; Dinzidan Adiputra; Fata Habiburrahman; Md Afsar Ahmed Sumon; Abdul Manan; Rozi; Muhammad Hanif Azhar
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.409

Abstract

The Sumatran Barb fish (Puntigrus tetrazona) is a freshwater ornamental fish which is highly demanded in the ornamental fish export market for its attractive colour patterns. The common problem in ornamental fish farming is the excessive use of water resources, increasing operational costs. A Recirculating Aquaculture System (RAS) is preferred since it can process water repeatedly and is more environmentally friendly. Duckweed plants (Lemna minor) can be used as a natural biofilter because they absorb nutrients such as nitrogen and phosphorus and provide a habitat for beneficial bacteria. This study was conducted for 40 days, with the treatments consisting of different plant coverage areas. Duckweed plants were applied with area coverage of P0/control (without duckweed plant), P1 (20% area coverage of duckweed plants), P2 (40% area coverage of duckweed plants), and P3 (60% area coverage of duckweed plants). The bacterial abundance values obtained during the maintenance period ranged from 1.52 to 1.79 x 106 CFU mL-1 and differed significantly (P<0.05) across all treatments. The lowest TPC value was observed in the P0 treatment (1.52 x 106 CFU mL-1), and the highest in the P2 treatment (1.79 x 106 CFU mL-1). Based on the identification test, bacteria belonging to the genera Neisseria, Acinetobacter, Nitrosomonas, and Pseudomonas were identified. Water quality parameters were optimal across all treatments, namely pH between 6.0 and 6.85, dissolved oxygen (3.43-3.95 mg L-1), TAN (0.2-0.4 mg L-1), and phosphate (1.00-2.5 mg L-1). Meanwhile, temperature and nitrate exceeded the optimal limits, with values ranging from 29 to 30 °C and 72 to 210 mg L-1 across all treatments.
The Effect of Seaweed Carrageenan (Kappaphycus Alvarezii) Concentration on Vitamin C Content, Moisture Content, pH and Sensory Characteristics of Tomato Sauce Rahmasari, Naila Dwi; Sahidu, Andriyana Monica; Mubarak, Ahmad Shofy; lutfiyah, Lailatul; Saputra, Eka; Subekti, Sri
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.411

Abstract

Tomato sauce generally requires a thickening agent to improve its viscosity. Synthetic thickeners such as carboxymethyl cellulose (CMC) may increase pH, making them less suitable for meeting the quality requirements of tomato sauce, which is naturally acidic. This study aimed to evaluate seaweed carrageenan (Kappaphycus alvarezii) as a natural thickener and to determine the effect of different concentration levels on vitamin C content, moisture content, viscosity, pH, and sensory characteristics of tomato sauce. This study used a completely randomized design with five treatments and four replications, a positive control with 0.25% CMC, and carrageenan treatments at concentrations of 0.25%, 0.30%, and 0.35%, each with four replications. Chemical and physical parameters were analyzed using one-way ANOVA followed by Duncan’s multiple range test, while sensory evaluation data were analyzed using the Kruskal–Walli’s test followed by the Mann–Whitney test at a 95% confidence level. The results showed that increasing carrageenan concentration significantly increased vitamin C content and viscosity, while significantly reducing moisture content and pH (p < 0.05). The 0.35% carrageenan treatment produced the highest vitamin C content (4.00 mg/100 g), the lowest moisture content (70.63%), the highest viscosity (15.58 cPs), and a pH of 3.25. Sensory evaluation indicated that carrageenan significantly affected texture but had no significant effect on appearance, aroma, or taste. Carrageenan at a concentration of 0.35% was considered the optimal level for producing tomato sauce with the best physicochemical quality and texture while maintaining an appropriate pH range for tomato sauce.
Technology and Policy Strategies for Enhancing Freshwater Fish Seed Production Capacity at the Regional Fish Hatchery (UPTD BBI) of Bontang City Wardi, Syamsu; Amrullah; Dahlia; Latief, Nursidi; Tompo, Muslimin
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.414

Abstract

The production capacity of freshwater fish seeds at the Regional Fish Hatchery (UPTD BBI) of Bontang City has not met regional demand. This study aims to formulate technology and policy strategies to enhance freshwater fish seed production capacity. This study uses primary and secondary data to provide a comprehensive overview of freshwater fish seed production capacity at the Bontang City BBI Technical Implementation Unit. The research sample was selected using purposive sampling, comprising 30 internal respondents BBI and 7 relevant academic experts. A mixed-methods approach was applied, including SWOT analysis, IFE–EFE and IE matrices, and the Analytical Hierarchy Process (AHP). Results indicate that actual production of 173,840 seeds per year satisfies only approximately 14.5% of regional demand (±1,200,000 seeds/year), resulting in an 85.5% supply deficit. IFE (±2.40) and EFE (±2.00) scores place the organization in IE Quadrant V (hold and maintain). AHP results identify technology and production systems as the top priority (weight 0.30), followed by human resources and infrastructure (each 0.20). The integrated SWOT–AHP analysis prioritizes the WO strategy (global weight 0.38). Strengthening production systems, improving human resource capacity, and gradually upgrading infrastructure are recommended to increase seed production capacity and support regional food security
Efficacy of Clove Oil (Syzygium aromaticum) as a Natural Anaesthetic at Various Doses on the Survival Rate of Fighting Fish (Betta sp.) During Closed Transport Saeful Rohman, Furqon; Budiyanto, Didik; Agustini, Maria
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.417

Abstract

Fighting fish (Betta sp.) is a popular ornamental fish with high economic value, requiring special handling during maintenance, transportation, or medical procedures to prevent stress and injury. However, concerns about their negative impacts on human health, the environment, and potential residues in fishery products have led regulatory bodies to restrict or prohibit their use. In Indonesia, the Ministry of Marine Affairs and Fisheries through Regulation No. 1/PERMEN-KP/2019 has officially categorised MS-222 as a restricted veterinary pharmaceutical substance, thereby driving the aquaculture industry to seek safer and more sustainable alternatives. Therefore, a safe natural anaesthetic alternative is needed, such as clove oil containing eugenol. This research is important to study the effectiveness of clove oil as a natural anaesthetic for fighting fish, to provide a safe, effective, and environmentally friendly guide for cultivators and entrepreneurs. This research used a Completely Randomized Design (CRD) method with 4 different clove oil doses (0.1 ml, 0.2 ml, 0.3 ml, and 0.4 ml) and 6 replications, where each plastic contained 100 ml of water, 1 fighting fish, and oxygen, was sealed with a rubber band, placed in a styrofoam box, and simulated for an 8-hour journey. The results showed that the administration of different clove oil doses significantly affected the survival rate of fighting fish (Betta sp.) in closed transport (p < 0.05). The optimal dose identified was 0.1 ml per 100 ml of water, with the highest survival rate reaching 96.67%. This dose resulted in an induction time of 29.83 minutes, an anaesthesia duration of 265.00 minutes, and a recovery time of 25.17 minutes, and showed no negative impact on water quality parameters during transport.
Analysis Of Factors Affecting Vannamei Shrimp Production at PT Bengkulu Sukses Lestari Aquaculture (PT. BSLA) Ali Fahmi Syahputra; Rhochmad Wahyu Illahi; Yeni Sari Wulandari; Amalia Febryane Adhani Mazaya; Elfa Fitriana
Grouper Vol. 17 No. 1 (2026): Grouper: Jurnal Ilmiah Perikanan
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/grouper.v17i1.420

Abstract

Vannamei shrimp has several advantages for aquaculture, including a strong feeding response, high appetite, relatively high resistance to poor environmental conditions, rapid growth, and high survival rate. In the current competitive business environment, aquaculture enterprises are required to optimize production processes to improve productivity and maintain competitiveness. This study aimed to identify the production factors affecting vannamei shrimp production at PT Bengkulu Sukses Lestari Aquaculture (PT BSLA), both partially and simultaneously. The study was conducted at a single pond site owned by PT BSLA using a quantitative descriptive method. Four independent variables were analyzed, namely land area (X1), fry (X2), feed (X3), and labor (X4), while production was used as the dependent variable. Data were analyzed using multiple linear regression with SPSS. The results showed that land area and labor had a significant partial effect on vannamei shrimp production, while fry and feed did not show a significant partial effect. Simultaneously, land area, fry, feed, and labor significantly affected vannamei shrimp production. These findings imply that optimizing land utilization and labor management is essential to improve the productivity and sustainability of vannamei shrimp farming at the company level.

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