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All Journal JFMR (Journal of Fisheries and Marine Research) Fisheries : Jurnal Perikanan dan Ilmu Kelautan
Amalya, Tria
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Engineering Environmental Science Social Sciences

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Pathology of Silver Rasbora (Rasbora argyrotaenia) After Injection of Polyhhenol From Kappaphycus alvarezii Kumalaningrum, Dwi Retna; Mauludia, Farida; Asyabil, Alin; Wahyudi, Diki; Amalya, Tria; Prayogi , M. Fahmi Dimas
JFMR (Journal of Fisheries and Marine Research) Vol. 9 No. 3 (2025): JFMR on November
Publisher : Faculty of Fisheries and Marine Science, Brawijaya University, Malang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2025.009.03.9

Abstract

Rasbora argyrotaenia is an endemic Indonesian freshwater fish with high economic value. However, its population has decreased due to overexploitation and environmental pollution. One of the sustainable aquaculture approaches that is being developed is the utilisation of natural bioactive compounds such as polyphenol from Kappaphycus alvarezii seaweed. This study aimed to evaluate the pathological impact of polyphenol extract injections from K. alvarezii at various doses on the liver of silver rasbora.  The test fish were given injections into their abdomens at doses of 5.4, 7.2, and 9.0 mg/kg body weight. Tannic acid was used as the positive control, and no injection was given as the negative control. Histopathological results revealed hepatocyte degeneration and necrosis, which worsened at a dose of 9.0 mg/kg, indicating oxidative stress as the primary mechanism of tissue damage. Water quality parameters during the study were within the optimal range for fish life. These findings suggest that while polyphenols have the potential to act as immunostimulants, their use at high doses may cause significant liver toxicity. Therefore, their utilisation in aquaculture must be carefully managed and based on optimal dosages.
MANAJEMEN PEMBERIAN PAKAN TERHADAP PERKEMBANGAN LARVA IKAN KERAPU CANTANG (Epinephelus sp.) DI BALAI PERIKANAN BUDIDAYA AIR PAYAU (BPBAP) SITUBONDO Amalya, Tria
FISHERIES Jurnal Perikanan dan Ilmu Kelautan Vol 7 No 2 (2025): Oktober
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/fisheries.v7i2.100

Abstract

Cantang Grouper (Epinephelus sp.) is a commodity being developed as a superior product for export with a fairly high economic value. The nature of this grouper is faster growing and easily adapts to various environmental conditions. However, there is a problem in Cantang Grouper cultivation, namely a high mortality rate during the transition period between consuming natural feed and artificial feed. Therefore, it is necessary to have feed management to adjust the feed to the needs of the fish so that the fish get the required nutrition. The purpose of this study was to determine the management of feeding on the development of Cantang Grouper larvae at the Brackish Water Aquaculture Center (BPBAP) Situbondo Regency, East Java. The research method was carried out by observing all activities related to feeding management on the development of Cantang Grouper larvae (Epinephelus sp.) then the results obtained were described to illustrate the findings. The results showed that the feed for Cantang Grouper larvae consisted of two types, namely natural feed and artificial feed given Ad libitum. Feeding of Cantang Grouper larvae was done by mixing feed or overlead. Next, the feed dosage was increased according to the age of the larvae, followed by their organ development and metabolism. The calculated Hatching Rate (HR) was 34% and 28%, below standard, while the Survival Rate (SR) was 21.61%, considered low. This was due to high stocking densities and cannibalism.
Co-Authors Alin Asyabil Dwi Retna Kumalaningrum Mauludia, Farida Prayogi , M. Fahmi Dimas WAHYUDI, DIKI