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All Journal Journal of Fish Health
Rangga Idris Affandi
Study Program of Aquaculture, Department of Fisheries and Marine Science, Faculty of Agriculture, University of Mataram
Agriculture, Biological Sciences & Forestry

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Effectiveness of Octopus (Octopus sp.) Ink Extract on the Growth of Mozambique Tilapia (Oreochromis mossambicus) Infected with Aeromonas hydrophila Elsa Sabathini; Rangga Idris Affandi; Awan Dermawan
Journal of Fish Health Vol. 6 No. 2 (2026): Journal of Fish Health
Publisher : Study Program of Aquaculture, Department of Fisheries and Marine Science, Faculty of Agriculture, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v6i2.10117

Abstract

Mozambique tilapia (Oreochromis mossambicus) is an important aquaculture commodity in Indonesia; however, its productivity can be constrained by disease outbreaks, including Aeromonas hydrophila infection. The use of natural feed additives containing nutritional and bioactive compounds is a promising strategy to improve fish growth and health. This study aimed to evaluate the effectiveness of octopus (Octopus sp.) ink extract supplemented in feed on the growth performance of Mozambique tilapia infected with A. hydrophila. The study was conducted for 45 days using a completely randomized design with five treatments and three replications. The treatments consisted of a positive control, namely feed without octopus ink extract with A. hydrophila infection (K+); a negative control, namely feed without octopus ink extract and without A. hydrophila infection (K-); and feed supplemented with octopus ink extract at 50, 100, and 150 ml/kg feed followed by A. hydrophila infection (A, B, and C, respectively). The observed growth parameters were absolute weight gain, absolute length gain, specific weight growth rate, and specific length growth rate. The results showed that octopus ink extract supplementation improved all growth parameters compared with the positive control. The best performance was obtained in treatment B (100 ml/kg feed), with an absolute weight gain of 10.77±1.53 g, absolute length gain of 2.65±0.39 cm, specific weight growth rate of 2.59±0.11%/day, and specific length growth rate of 2.16±0.05%/day. Therefore, octopus ink extract has potential as a natural feed additive to enhance the growth performance of Mozambique tilapia challenged with A. hydrphila.
Effects of Four Hydrocolloid Binders on Paste-Feed Stability and Behavioral Acceptance by Rice Field Eels (Monopterus albus) Nurmahraini; Zaenal Abidin; Rangga Idris Affandi
Journal of Fish Health Vol. 6 No. 3 (2026): Journal of Fish Health
Publisher : Study Program of Aquaculture, Department of Fisheries and Marine Science, Faculty of Agriculture, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jfh.v6i3.6364

Abstract

Rice field eels (Monopterus albus) are economically valuable, but culture development is constrained by continued reliance on wild stocks and natural feeds. This study explored how alginate, carboxymethyl cellulose (CMC), guar gum, and carrageenan, each included at 0%, 10%, 15%, or 20%, affected the water stability of paste feed. A separate behavioral-acceptance assessment compared the control with 10% alginate, 15% CMC, 15% guar gum, and 15% carrageenan. Stability observations were conducted in triplicate. The available experimental records did not establish independent animal-level units for the acceptance assessment; therefore, acceptance outcomes are reported descriptively and should not be interpreted as confirmatory treatment effects. Water addition differed among formulations (approximately 5–20 mL), creating a confounding effect between binder treatment and moisture content. Under these conditions, feeds containing 10% guar gum or 10% carrageenan remained physically intact longer than the other tested formulations. Behavioral-response counts did not provide reliable evidence of differences among acceptance treatments. These findings are exploratory and identify guar gum and carrageenan formulations for further testing in experiments that standardize moisture content and use clearly defined, randomized, independent animal or tank replicates.
Co-Authors Awan Dermawan Elsa Sabathini Nurmahraini Zaenal Abidin