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All Journal Akuatik: Jurnal Sumberdaya Perairan
BOBY DANI DARMAWAN
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Agriculture, Biological Sciences & Forestry Environmental Science

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PEMANFAATAN EKSTRAK KUNYIT DAN BAWANG PUTIH SEBAGAI NUTRISI TAMBAHAN ALAMI PADA PAKAN DAN APLIKASINYA TERHADAP BENIH IKAN LELE DUMBO (Clarias gariepinus) BOBY DANI DARMAWAN
Akuatik: Jurnal Sumberdaya Perairan Vol 2 No 1 (2008): AKUATIK : Jurnal Sumberdaya Perairan
Publisher : Department of Aquatic Resources Management, Faculty of Agriculture, Fisheries, and Biology, University of Bangka Belitung

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Abstract

Nowadays, the chemical ingredients of several additional foods had known as carcinogenic materials. To avoid that, some kind of natural materials are used to be an alternative which it safe and had a lot of important function because of their bioactive essences. Some of them are curcuma ginger and union. This research is done to prove the advantages of using natural additional nutrition from curcuma ginger and union’s essences for African catfish growth performance. The survival and growth performance of African catfish (Clarias gariepinus) fingerlings fed with natural additional nutrition from curcuma ginger and union’s essences raising better than normally nursery. After 45 days rearing period, the percentage fingerling survival for the treatment is 98.33% better than control that only 86.67%. Fingerlings with treatment had the greatest average daily growth, mean body weight, and final average length and was significantly different (p<0.05) from control. Beside of that, the treatment with additional nutrition has undirectly effect to water balance system. This treatment could stabilize the water pH on rearing aquarium.
PENGARUH PEMUPUKAN SUSULAN TERHADAP KUALITAS MEDIA DAN PROSES BUDIDAYA UDANG VANNAMEI (Litopenaeus vannamei) PADA TAMBAK TRADISIONAL PLU BOBY DANI DARMAWAN
Akuatik: Jurnal Sumberdaya Perairan Vol 2 No 2 (2008): AKUATIK : Jurnal Sumberdaya Perairan
Publisher : Department of Aquatic Resources Management, Faculty of Agriculture, Fisheries, and Biology, University of Bangka Belitung

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Abstract

White leg shrimp is one of 110 Penaeid species which have more profitable chances to cultivate. These shrimp could produce 10 – 20 tons per Ha compare with tiger prawn that only produce 2 – 5 tons per Ha. White leg shrimp could be harvested less than 120 days, and it more resist to the disease, not only that, the other advantages of these shrimp was its habit that live at all over the teritorial of the media so that it can be cultivate with higher density. The optimal result or product from brackishwater pond cultivation is according to how the technical nursery was done. Water quality was the most important point that must be checked and controled to gain the optimal production. The following fertilization was an alternative way to stabilize the water quality especially in traditional pond. This manner could make the bio-organism such as fitoplankton and benthos as white leg shrimp’s natural food grow continously. The study was done with four different doses of the following fertilization (2,5%, 5%, 7,5%, and 10% from forward fertilization). After 86 days rearing period, the best following fertilization shown with the dose 5% from forward fertilization. Water quality such pH, ammonium, sulfic acid and dissolved oxygen with this manner reached the best condition and significantly different from the other (p<0,05 for dissolved oxygen and sulfic acid; and p<0,01 for pH and ammonium). In spite of the water quality, the pond with 5% following fertilization got the best result of harvesting. This manner had the greatest biomass, and average body weight and was high significantly different from the other (p<0,01) The survival rate was got the highest mark although its not significantly different from the test (74,147%) and so as the average daily growth (0,194 gr per day).
PEMANFAATAN RUANG MEDIA BUDIDAYA KERAMBA JARING APUNG MELALUI POLIKULTUR IKAN KERAPU (Serranidae), IKAN KUWE (Carangidae), DAN IKAN NAPOLEON (Cheilinus undulatus) BOBY DANI DARMAWAN
Akuatik: Jurnal Sumberdaya Perairan Vol 3 No 1 (2009): AKUATIK : Jurnal Sumberdaya Perairan
Publisher : Department of Aquatic Resources Management, Faculty of Agriculture, Fisheries, and Biology, University of Bangka Belitung

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Abstract

Commonly, the problem of using floating net cage is how to cultivate the commodity in limited space with high density to gain the maximum production. This study was therefore designed to answer that question. The habit of fishes which it live at the different space at water territorial such as demersal, pelagic, and benthic fishes was used in this research. The space usement for polyculture was done according to the fishes habit which its live at the different water territorial. Economical potent of the cultured fishes was also attended to get the profit from this business. According to the statement, the fishes used in this research was trevally (demersal), grouper (benthic), and napoleon wrasse (pelagic). The water space usement of floating net cage brought the positive things. The cultivated fishes growth with no problem such as the normally cultivation in a single space of floating net cage. The food is used optimally, shown with the food convertion ratio 5,13 : 1. The water space usement at this research not make some problem called competition in space usement and feeding either. Polyculture made the usement of floating net cage more efficient. The cultivation that normally used three places was minimized to became a single place. This manner also decreasing the time and the energy of the cultivator for feeding and nursering.
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