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All Journal Jurnal Biologi Tropis Journal of Fish Health
Dewi Nur'aeni Setyowati
University of Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Growth Performance Sargassum sp. Cultivated in Labuan Ijuk, Moyo Hilir Sumbawa Besar Regency, Nusa Tenggara Barat Nunik Cokrowati; Dewi Nur'aeni Setyowati; Salnida Yuniarti Lumbessy; Erwansyah Erwansyah
Jurnal Biologi Tropis Vol. 21 No. 3 (2021): September - Desember
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v21i3.2936

Abstract

Sargassum sp. is an alginate-producing brown alga that is used in the food, drug, and cosmetic industries. Sargassum sp. can be found in the waters of West Nusa Tenggara, namely on the islands of Lombok and Sumbawa. Sargassum sp. has not been cultivated in the waters of West Nusa Tenggaracurrently, Sargassum sp. is only exploited from nature. So it is necessary to cultivate efforts in the waters of West Nusa Tenggara. The waters of Labuan Ijuk, Sumbawa Besar Regency, have the potential as a location for the development of Sargassum sp. This study aimed to study the growth performance of Sargassum sp. with different initial seedling weights by using the bottom-off method. The research method used is the experimental method with the experimental design is a completely randomized design. The treatment in this study consisted of five treatments with four replications. Treatment A with 50 gr seed weight, B 75 gr seed weight, C 100 gr seedling weight, D 125 gr seedling weight, and E 150 gr seedling weight. Data analysis using ANOVA and 5% BNJ follow-up test. The results showed that the highest absolute weight was obtained in treatment E, which was 39.75 g, as well as the highest specific weight was obtained in treatment E, which was 36.81%. The lowest absolute weight was obtained in treatment C, 24.25 g, with the lowest specific weight also being 26.47%. This research concludes the optimum growth of Sargassum sp. obtained in cultivation using an initial seed weight of 150 gs.      
Effect of Calcium Carbonate Addition on The Growth and Feed Conversion Ratio of Gourami (Osphronemus goramy) Seed Dewi Nur'aeni Setyowati; Anita Prihatini Ilyas; Awan Dermawan; Sanca Rahmatullah
Jurnal Biologi Tropis Vol. 22 No. 1 (2022): January - March
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v22i1.3211

Abstract

Gourami is one of the main freshwater fish commodities which has a high economic value. One of the efforts that can be made to increase the productivity of gourami is the provision of macromineral in the form of calcium carbonate (CaCo3). This study aimed to determine the effect of calcium on productivity that would be seen through the growth rate and feed conversion ratio of gourami seed. The study consisted of five doses of calcium carbonate, each of which was repeated three times. As for treating the doses of calcium carbonate, including 1 (0 mg / L CaCO3), 2 (150 mg / L CaCO3), 3 (200 mg / L CaCO3), 4 (250 mg / L) CaCO3) and 5 (300 mg / L CaCO3). The maintenance medium is added with a salinity of 3 ppt in order to save metabolic energy through an osmoregulation mechanism so that the available energy is expected to be used to increase growth. The result or absolute weight growth was not significantly different based on the analysis of variance and linier regression analysis. The analysis of variance showed that no significant different for survival rate of all treatments. The value of feed  conversion ratio was not significantly different based on analysis of variance and linier regression analysis. Addition of calcium carbonate did not give significant difference in the absolute weight growth, survival rate, and feed conversion ratio of gourami seed.
EFFECTIVENESS TEST OF ONION EXTRACT (Allium cepa L.) ON BACTERIA GROWTH Aeromonas hydrophila IN VITRO Ulfa Wahyuni; Saptono Waspodo; Dewi Nur'aeni Setyowati
Journal of Fish Health Vol. 2 No. 2 (2022): Journal of Fish Health
Publisher : Aquaculture Department, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.599 KB) | DOI: 10.29303/jfh.v2i2.1415

Abstract

Aeromonas hydrophila is a bacterium that causes MAS disease (Motile Aeromonas Septicemia), often found by cultivators. This study aimed to determine the effectiveness of onion extract (Allium cepa L.) in replacing chemical antibiotics and the correct dosage to inhibit the growth of Aeromonas hydrophila bacteria in vitro. The research method used was a Completely Randomized Design (CRD) with 7 treatments and 3 replications, P1 (Control-), P2 (Control+), P3 (10% onion extract), P4 (25% onion extract), P5 (50% onion extract), P6 (75% onion extract), P7 (100% onion extract). The results showed that 30 ml of onion extract obtained from 101.3 grams of onion powder had a yield value of 29.812%. Some secondary metabolite compounds in onion extract are flavonoids, alkaloids, saponins, tannins, steroids, and phenols, which function as antibacterial compounds. The diameter of the clear zone of 10% onion extract has a value of 26 mm and has a value that is not significantly different from the use of 50% chloramphenicol antibiotics with an inhibition zone diameter of 26.67 mm, treatment with onion extract with a concentration of 100% gives the same inhibition zone diameter. The highest is 34.17 mm.
Co-Authors Anita Prihatini Ilyas Awan Dermawan Erwansyah Erwansyah Lumbessy, Salnida Yuniarti Nunik Cokrowati Sanca Rahmatullah Saptono Waspodo Ulfa Wahyuni