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La Ode Baytul Abidin
Department of Aquaculture, Faculty of Fisheries and Marine Science, Halu Oleo University
Agriculture, Biological Sciences & Forestry

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Immunostimulatory Potential of Dietary Citronella (Cymbopogon nardus) Powder Combined with Probiotics in Nile Tilapia Infected with Aeromonas hydrophila Auh Misriani; Indriyani Nur; La Ode Baytul Abidin
Journal of Fish Health Vol. 6 No. 1 (2026): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/zd821062

Abstract

Motile Aeromonas Septicemia (MAS) caused by Aeromonas hydrophila, is a major bacterial disease in Nile tilapia aquaculture and result in substantial production losses. The excessive use of antibiotics for disease control has raised concerns regarding antimicrobial resistance and environmental contamination, thereby necessitating safer and more sustainable alternatives. This study evaluated the immunostimulatory effect of dietary supplementation with citronella (Cymbopogon nardus) powder combined with probiotics on Nile tilapia challenged with MAS. A completely randomized design was employed using four dietary treatments: a basal diet without supplementation and three experimental diets supplemented with 15 mL of probiotics and citronella powder at doses of 7.5, 10, or 12.5 g per kg of diet (PC-7.5, PC-10, or PC-12.5). Fish were fed the experimental diets for 14 days prior to challenge with A. hydrophila (107 CFU/mL), followed by a post-challenge recovery period. Recovery rate, survival rate, and hematological parameters were assessed. The result indicated that dietary supplementation, particularly PC-7.5, tended to improve recovery and survival rates, although these differences were not statistically significant (P > 0.05). In contrast, hematological parameters were significantly influenced by the dietary treatments (P < 0.05), with PC-7.5 diet producing higher hematocrit, hemoglobin, and leukocyte values, as well as faster hematological recovery following infection. These findings suggest that dietary supplementation with 7.5 g of citronella powder per kg of diet combined with 15 mL probiotics effectively enhances immune response and support disease resistance in Nile tilapia, representing a promising and environmentally friendly strategy for MAS control in aquaculture.
Optimization of Probiotic Dosage in Tomato Meal-Enriched Diet to Improve Growth and Feed Utilization Efficiency in Whiteleg Shrimp (Litopenaeus vannamei) Khusnul Qarima Firdaus; Rahmad Sofyan Patadjai; La Ode Baytul Abidin
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.v6i2.10076

Abstract

Probiotics and prebiotics are promising functional feed additives in aquaculture because they can improve gut health, nutrient utilization, growth, and survival of cultured aquatic species. This study aimed to evaluate the effects of different probiotic dosages in a tomato meal enriched diet on growth performance, feed utilization efficiency, and survival of whiteleg shrimp. The experiment was conducted using a completely randomized design consisting of four treatment and three replicates. The treatments included PR-5, PR-10, and PR-15, representing tomato meal-enriched diet supplemented with 5, 10, and 15 mL probiotic/kg feed, respectively, and WPR, representing tomato meal-enriched diet without probiotic supplementation. The shrimp were reared for 30 days and evaluated for weight gain, specific growth rate, feed conversion ratio, feed efficiency, and survival rate. The results showed that probiotic supplementation significantly affected weight gain, feed conversion ratio, feed efficiency, and survival rate (P < 0.05), but did not significantly affect specific growth rate on day 15 or day 30 (P > 0.05). The PR-15 treatment produced the highest weight gain of 7.53 g, the lowest feed conversion ratio of 15.68, the highest feed efficiency of 6.39%, and the highest survival rate of 80.00%. These findings indicate that supplementation with 15 mL probiotic/kg feed in a tomato-meal enriched diet was the most effective treatment for improving growth performance, feed utilization efficiency, and survival of whiteleg shrimp. Therefore, this dietary strategy may support more efficient and sustainable whiteleg shrimp culture.
Co-Authors Auh Misriani Indriyani Nur Khusnul Qarima Firdaus Rahmad Sofyan Patadjai