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All Journal Jurnal Perikanan dan Kelautan Asian Journal of Aquatic Sciences Jurnal Perikanan dan Kelautan
Sri Wahyuni
Department of Marine Science, Faculty of Fisheries and Marine Sciences, Teuku Umar University
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Social Sciences

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Enhancement of Fish Immunity and Survival Rate Through Dietary Supplementation with Sargassum sp. Powder Sri Wahyuni; Asri Mursawal; Anisa Mardhatila; Ronal Kurniawan; Ervia Yudiati
Jurnal Perikanan dan Kelautan Vol. 31 No. 1 (2026): February
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.31.1.25-31

Abstract

Pathogenic bacterial infections in intensive aquaculture systems are among the primary causes of high fish mortality, underscoring the need for safe, sustainable natural antibacterial alternatives. Sargassum sp. is known to contain bioactive compounds with potential antibacterial and immunostimulatory properties. This study aimed to evaluate the effects of dietary supplementation with Sargassum sp. powder on the immune response and survival rate of Nile tilapia (Oreochromis niloticus). The experiment was conducted using a Completely Randomized Design (CRD) with one factor and five treatments: negative control (Kn), positive control (Kp), and dietary treatments P1 (15 g/kg feed), P2 (30 g/kg feed), and P3 (45 g/kg feed). Observed parameters included hematological profiles (erythrocytes, leukocytes, hemoglobin, hematocrit, and leukocrit) and survival rate during 30 days of rearing. The results showed that dietary supplementation with Sargassum sp. powder significantly improved hematological parameters in Nile tilapia compared with the control groups. The highest values were observed in P1, with total erythrocytes (1.66 × 10⁶ cells/mm³), hemoglobin (8.73%), hematocrit (31.3%), and leukocrit (1.67%). The highest survival rate was also recorded in P1 and Kp (100%). Therefore, the inclusion of Sargassum sp. powder at 15–30 g/kg feed is recommended as the optimal dosage to enhance the immunity and survival rate of Nile tilapia
POPULATION DYNAMICS OF KAWAKAWA (Euthynnus affinis) LANDED AT PPI UJONG BAROH, WEST ACEH Asri Mursawal; Sri Wahyuni; Anisa Mardhatila; Oktavia Oktavia; Fitri Diana; Serliana Hotmariska Marbun; Ronal Kurniawan
Asian Journal of Aquatic Sciences Vol. 8 No. 3 (2025): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.8.3.345-355

Abstract

This study analyzed the population dynamics of kawakawa tuna (Euthynnus affinis) landed at PPI Ujong Baroh, West Aceh, from May to August 2025, using length-frequency data and the Von Bertalanffy growth model. A total of 815 individuals were measured to estimate growth, mortality, and exploitation parameters. The fork length ranged from 22–69 cm, dominated by medium-sized fish (30–37 cm FL), with the length at first capture (Lc = 33 cm FL) notably smaller than the length at first maturity (Lm ≈ 42–43 cm FL). Growth analysis indicated rapid juvenile growth, characterized by an asymptotic length (L∞) of 90 cm and a relatively high growth coefficient (K), while recruitment occurred periodically throughout the year. Mortality estimates showed total mortality (Z) of 4.77/year, natural mortality (M) of 1.45/year, and fishing mortality (F) of 3.32/year, resulting in an exploitation rate (E) of 0.70, which exceeds the optimal reference point (E = 0.5). These findings indicate that the kawakawa tuna stock in West Aceh is currently overexploited. This study provides the first updated, location-specific population parameter estimates for E. affinis in West Aceh waters, offering a critical scientific baseline for regionally adaptive fisheries management. Science-based management measures are therefore recommended, including implementing a minimum landing size of ≥43 cm FL, seasonal closures during spawning periods, effort control, and strengthened fisher participation to ensure long-term stock sustainability
Enhancement of Fish Immunity and Survival Rate Through Dietary Supplementation with Sargassum sp. Powder Sri Wahyuni; Asri Mursawal; Anisa Mardhatila; Ronal Kurniawan; Ervia Yudiati
Jurnal Perikanan dan Kelautan Vol. 31 No. 1 (2026): February
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jpk.31.1.25-31

Abstract

Pathogenic bacterial infections in intensive aquaculture systems are among the primary causes of high fish mortality, underscoring the need for safe, sustainable natural antibacterial alternatives. Sargassum sp. is known to contain bioactive compounds with potential antibacterial and immunostimulatory properties. This study aimed to evaluate the effects of dietary supplementation with Sargassum sp. powder on the immune response and survival rate of Nile tilapia (Oreochromis niloticus). The experiment was conducted using a Completely Randomized Design (CRD) with one factor and five treatments: negative control (Kn), positive control (Kp), and dietary treatments P1 (15 g/kg feed), P2 (30 g/kg feed), and P3 (45 g/kg feed). Observed parameters included hematological profiles (erythrocytes, leukocytes, hemoglobin, hematocrit, and leukocrit) and survival rate during 30 days of rearing. The results showed that dietary supplementation with Sargassum sp. powder significantly improved hematological parameters in Nile tilapia compared with the control groups. The highest values were observed in P1, with total erythrocytes (1.66 × 10⁶ cells/mm³), hemoglobin (8.73%), hematocrit (31.3%), and leukocrit (1.67%). The highest survival rate was also recorded in P1 and Kp (100%). Therefore, the inclusion of Sargassum sp. powder at 15–30 g/kg feed is recommended as the optimal dosage to enhance the immunity and survival rate of Nile tilapia
Co-Authors Anisa Mardhatila Asri Mursawal Ervia Yudiati Fitri Diana Oktavia Oktavia Ronal Kurniawan Serliana Hotmariska Marbun