SWL-Fisheries and Marine

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Browsing SWL-Fisheries and Marine by Author "Azrita, Azrita"

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    Effects of Enrichment Commercial Feed with Different Fat Sources on Survival and Growth of Bonylip Barb (Osteochilus vittatus Cyprinidae) Fingerlings
    (2018-02-13) Aryani, Netti; Mardiah, Ainul; Azrita, Azrita; Syandri, Hafrijal
    Bonylip barb (O. vittatus ) is a freshwater fish which have economic value. This study was carried out to evaluate the effect of oil enriched commercial feed on the survival and growth of O. vittatus . Methodology: Feed enriched with 9% of Shark Liver Oil (SLO), Fish Oil (FO), Corn Oil (CO) and Soybean Oil (SO) which had total fatty acid were 68.18, 86.57, 48.19 and 31.16%, respectively. The addition of different source of fat had influence on fatty acid composition of feed. The O. vittatus fingerlings performance was evaluated based on the survival and growth parameter. Results: Feed enriched with CO and SO obtained the lowest survival rate. The enrichment commercial feed with SO also displayed the lowest of weight, total length and percentage weight gain. Specific rate growth of O. vittatus fingerlings was highest with feed enriched with FO and SLO, followed by feed enrichment with CO and SO. Meanwhile, feed enrichment with SO produced the highest feed conversion ratio. Conclusion: Feed enriched with 9% of FO is good for survival, growth and feed conversion ratio of O. vittatus fingerlings.
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    Influence of Feeding Rate on the Growth, Feed Efficiency and Carcass Composition of the Giant Gourami (Osphronemus goramy)
    (2018-02-13) Aryani, Netti; Azrita, Azrita; Mardiah, Ainul; Syandri, Hafrijal
    Aquaculture feeding rate is an important factor affecting the growth of giant gourami. The aims of the study were to investigate the effect of different feeding rates on the growth, and carcass composition of giant gourami (initial weight 14.17±0.15 g and length 9.88±1.11 cm). The nutrition content of the diet was a cross energy of 3,340.50 kcal/kg, made up of 30% crude protein, 7% crude lipid, 6% crude fiber, 12% ash, and 12% moisture as a percentage of fish body weight, with three replicates per treatment. Fish were fed three times per day at 09:00, 14:00, and 18:00. The experiment was carried out for 120 days. Each month, 30 fish were removed from each of the floating net cages to be measured and weighed. The biomass of fish was calculated, and the amount of feed was adjusted. The feeding rate significantly (p< 0.05) influenced the final fish weight, net weight gain (NWG), average daily growth (ADG), specific growth rate (SGR), and feed conversion ratio (FCR). The maximum growth of giant gourami was found at 6% feeding rate. However, the best feed conversion ratio (1.34±0.18) was obtained at the 4% feeding rate. The carcass composition (crude protein and crude lipid) of giant gourami with different feeding rates showed a significant increase (p<0.05) after 120 days of the experiment. Based on growth performance, feed efficiency, and carcass composition, a 6% feeding rate showed the best result for the growth of giant gourami in Maninjau Lake.