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Boedi S. Rahardja
Manajemen Kesehatan Ikan dan Budidaya Perikanan, Fakultas Perikanan dan Kelautan, Universitas Airlangga, Indonesia.
Biochemistry, Genetics & Molecular Biology

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Pengaruh Konsentrasi Pupuk Lemna Minor terhadap Populasi Dunaliella salina [Effect Of Lemna Minor Fertilizer Concentration On Dunaliella salina Population] Boedi S. Rahardja; Tjokorde Astrid S; Endang Dwi Masithah
Jurnal Ilmiah Perikanan dan Kelautan Vol. 5 No. 1 (2013): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v5i1.11426

Abstract

Abstract Dunaliella salina is a microalgae that have a high nutrient content, ctherefore Dunaliella salina widely used as an effective natural food, because they have cell walls and is easily digested. Dunaliella salina is rich in phytoplankton nutrients such as omega 3 and omega 6 and essential amino acids. Dunaliella salina has a large potential for the amount of β-carotene and glycerol. Lemna minor in addition containing nutrient n and p high also has a high concentration of minerals and pigment, especially beta carotene and xantofil so either for growth Dunaliella salina. This research aimed to know the effect of fertilizers on the growth of Lemna minor populations of Dunaliella salina and the optimal concentration of fertilizer Lemna minor in Dunaliella salina culture. Lemna minor doses used in this research are A (0 ml/l), B (0.25 ml/l), C (0.5 ml/l), D (0.75 ml/l), E (1 ml/l) and the use of fertilizers walne (1 ml/l) as with the control for the research. This research method is experimental methods. Research was done at the Faculty of Fisheries and Marine Laboratory, University of Airlangga for 7 days. The main parameter was observed the population Dunaliella salina. Supporting parameter includes water quality. The results suggest the best dose of fertilizer Lemna minor for the growth of Dunaliella salina is the dose in treatment D (0.75 ml/l) of 36.18x104 cells/ml, the highest growth occurred on the fifth day. Based on measurements of water quality throughout the treatment is still decent and good to support the the growth of Dunaliella salina during the research.
Pengaruh Penambahan Vitamin B pada Media Blotong 12 Kering terhadap Pertumbuhan Populasi Dunaliella salina [Effect of Adding Vitamin B on Blotong Dry Media 12 Againts Population Growth Dunaliella salina] Rahayu Kusdarwati; Mustofin Akhyar; Boedi S. Rahardja
Jurnal Ilmiah Perikanan dan Kelautan Vol. 3 No. 1 (2011): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v3i1.11628

Abstract

Abstract Dunaliella salina is one natural food that is good enough for the larvae of sea urchins and also can be used as food Brachionus plicatilis and Artemia in aquaculture feed Artemia. Blotong is precipitated in the process of purification juice before cooking and crystallized into sugar. Purification is a process to separate the juice from dirt or fibers. Sugarcane is used as fertilizer by using oven dried first. Vitamin B is needed some algae to build 12 proteins and essential as a coenzyme necessary for DNA synthesis in the formation of new cells. Vitamin B is a 12 coenzyme B -dependent methionine synthase and vitamin B -dependent ribonucleotide reductase. Vitamin B 12 12 12 dependent methionine synthase function for synthesis methionin (essential amino acids), whereas vitamin B 12 dependent ribonucleotide reductase functions to DNA synthesis. This study aims to determine the effect of vitamin B in dry blotong media on the growth of D. salina 12 population and to determine the optimal dosage of vitamin B in dry blotong media which can produce the highest 12 population growth of D. salina. This research used Completely Randomized Design (CRD) with seven treatments and three replications. The study used namely: Fertilizer blotong dried with the addition of vitamin B 10 g / L (A), dose of 12 12 ug / L (B), the dose of 14 ug / L (C), a dose of 16 ug / L (D), dose 18 ug / L (E), a dose of 20 ug / L (F) and control treatment of dry sugarcane fertilizer without adding vitamin B12 or dose 0 g / L (G). The main parameter used is the population of D. salina, while supporting the water quality parameters (salinity, pH and water temperature). Data were analyzed with ANOVA (analysis of variants) and to know the differences among the treatments performed Duncan's Multiple Range Test. The results showed that the addition of vitamin B in dry blotong media had no effect on the growth of population D. salina (p> 0.05). 
Efektifitas Bakteri Pseudomonas Sebagai Pengurai Bahan Organik (Protein,Karbohidrat,Lemak) Pada Media Air Limbah Pembenihan Ikan Lele Dumbo (Clarias sp.) Sistem Resirkulasi Tertutup [Effectiveness Of Pseudomonas Decomposing Organic Matter (Protein, Carbohydrate, Lipid) In Waste Water Of Dumbo Breeding Fish Catfish (Clarias sp.) Closed System Resirculation] Boedi S. Rahardja; Prayogo Prayogo; Gunanti Mahasri; Mochammad Dwi Hardhianto
Jurnal Ilmiah Perikanan dan Kelautan Vol. 2 No. 2 (2010): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v2i2.11645

Abstract

Abstract Raising fish rearing African catfish lately more and more attention due to its economical value, easy to maintain and grow quickly. Quality of water at seeding activities have received attention because of seed is a phase that is still vulnerable to environmental changes so that the replacement of water and absolutely must be done if the accumulation of organic materials that cause toxic. African catfish fish hatcheries closed recirculation system based on the work system of water management repeatedly by using a filter (filter) and decomposing bacteria. This study aimed to determine whether the bacterium Pseudomonas pseudomallei index of 97.81% sp, Pseudomonas stutzeri index 61.21% and 97.81% of Pseudomonas stutzeri index may decompose the organic material in an aqueous medium Clarias gariepinus hatchery closed recirculation system and how long required to decompose proteins, lipid and carbohidrat. This research method using descriptive methods, aims to describe symptoms that are based on data collected by observation. Factors include the observation of incubation time at the beginning of the experiment, day 3, day 6 and day-to-9 after incubation performed. This study uses four treatments, namely A (water catfish hatcheries closed recirculation system with the addition of the bacteria Pseudomonas pseudomallei index of 97.81%),B (catfish hatchery water recirculation system closed with the addition of the bacteria Pseudomonas stutzeri index of 97.81%), C (catfish hatchery water recirculation system closed with the addition of the bacteria Pseudomonas stutzeri index of 61.21% and D (catfish hatchery water recirculation system closed with the addition of Pseudomonas pseudomallei index of 97.81%, 97.81% index of Pseudomonas stutzeri and Pseudomonas stutzeri index of 61.21%). Result of this research shows that granting of Pseudomonas pseudomallei sp index 97.81%, 61.21% index of Pseudomonas stutzeri and Pseudomonas stutzeri index decreased 97.81% to give the effect of the proteins, lipid, carbohydrates, BOD and COD. The highest reduce protein content, lipid, carbohydrates, BOD and COD become to combination of pseudomonas bacteria after nine days.
Co-Authors Endang Dwi Masithah Gunanti Mahasri Mochammad Dwi Hardhianto Mustofin Akhyar Prayogo Prayogo Tjokorde Astrid S