One of the limiting problem in fish larvae rearing is the availability of live feed such as zooplankton and phytoplankton. Spirulina platensis is a phytoplankton with important uses in fish larvae culture either as a live feed or an ingredient supplementation in the feed. However, its cultivation has high economic costs associated with the growth medium. One of the alternative medium that potentially reduce costs and environmentally friendly is tofu wastewater. The purpose of this research is to evaluate the combination of tofu wastewater with urea for the cultivation of S. platensis. We investigated the growth of S. platensis in tofu wastewater containing various concentrations of urea: 0 g (control), 10 g, 20 g, 30 g, or 40 g urea added to 3 L diluted (2:1) tofu wastewater. The S. platensis productivity parameters were measured are population density, specific growth rate, and doubling time. The population density growth was significantly different, while the specific growth rate and doubling time were not significantly different for the various urea concentrations. The optimum growth was observed with 10 g urea per 3 L medium. This combination of tofu wastewater with urea could be a cost-effective medium for the cultivation of S. platensis.
Masalah utama yang dihadapi oleh para pembudi daya ikan lele dumbo saat ini adalah inefisiensi input produksi yaitu pemanfaatan pakan. Produktivitas dan margin keuntungan yang dihasilkannya sangat rendah. Permasalahan lain dari inefisiensi pakan yang muncul yaitu sisa pakan di dasar kolam dan pada akhirnya dapat menyebabkan racun bahkan Kematian pada ikan dan kegagalan produksi. Salah satu upaya yang perlu dilakukan adalah merekayasa dengan teknologi bioflok. Teknologi Bioflok pada budi daya ikan lele sangat penting ditransfer kepada masyarakat pembudi daya ikan. Tujuan kegiatan ini adalah untuk meningkatkan pengetahuan, keterampilan dan pendapatan masyarakat pembudi daya ikan. Metode yang dilakukan yaitu dengan alih teknologi, demonstrasi plot dan penerapan IPTEK. Hasil menunjukkan dengan masyarakat pembudi daya antusias dan terampil dalam penguasaan teknologi bioflok. Produktivitasnya mencapai 568 Kg dengan kepadatan tinggi dan FCR mencapai 0,7 serta keuntungan bersih mencapai Rp. 2.850.000,-. Kata kunci: lele, bioflok, teknologi
In aquaculture, Spirulina platensis is used as feed supplement in which contains amino acid phenylalanine. This study was conducted to evaluate the differences in the effect of spirulina-based microcapsules and commercial diets on the absolute, daily and specific growth and survival rates of milkfish larvae. The larvae were fed with Spirulina platensis as a core diet in microcapsules with different matrix (walls). The first capsule wall was gelatin and fish oil, while the second capsule wall was gelatin, fish oil and whole egg. The control group was fed with the commercial diet. A total of 1200 larvae were used in this experiments using the recirculation systems. The experiment was conducted in 42 days of culture. Larvae were fed three times a day and the feed was increased regularly as the size of the larvae increased. The results showed that the effects of both sprirulina-based microcapsules diets on the absolute growth rate (AG), specific growth rate (SGR) and average daily growth rate (ADGR) of Chanos chanos larvae were the same as on those larvae which were fed with the commercial diet. The survival rates were at 80.6±11.17% for those fed with Spirulina platensis with gelatin and fish oil wall; 84.6±8.44% for those fed with Spirulina platrensis with gelatin, fish oil and whole egg wall, and; 83.8±16.50% for those fed with the commercial diet. This study showed that Spirulina-based microcapsules had the same effect as the commercial feed on the growth of milkfish larvae indicating that this diet could replace the commercial diet.
The aims of this study was to get local raw material of feed fish able to improve growth anddevelopment of gonads and composition of the artificial feed and feed supplement that can improvethe reproductive performance of gouramy fish. The method used is the method of completelyrandomized. The research was used completly randomized design with four treatments and fourrepetition. The treatmens tested were four kinds, pellet commercial (60%) additional sprouts mungbean (Phaseolus radiatus L), fruit peel papaya (Carica papaya) and cabbage (Brassica oleracea L) by40%, and a pelleted commercial (100%) as control. Absolute growth ranges from 6-425 g, the relativegrowth of 3.7 to 22.1%, the growth day 1-7,1 g / day, feed efficiency from 7.8 to 29.33%, GSI 0.1 to1.1% and HSI 0.8 to 1.7%. Temperatures ranging from 23- 31,5⁰C, pH 6.6 to 7.5, Oxygen 5.0 - 6.2ppm , ammonia 0 - 0.25 ppm. Supplemental feed mixture (40%) and commercial pellets (60%) canimprove the growth and reproductive performance brood gouramy. Results of measurement oftemperature, pH and ammonia still qualify live gouramy.Keywords : alternative fish feeds, brood, Osphronemus gouramy
Konsumsi ikan masyarakat perlu ditingkatkan dan salah satu caranya adalah dengan membuat produk olahan ikan seperti abon ikan. Abon ikan yang diproduksi dan dipasarkan harus higienis, sehat dan dikemas dengan baik. Tujuan dari kegiatan pengabdian kepada masyarakat adalah untuk meningkatkan pengetahuan dan keterampilan UKM dalam memproduksi olahan ikan yang sehat, tanpa limbah dan kemasan produk. Metode yang digunakan untuk transfer iptek yaitu pendampingan teknis dan belajar sambil bekerjadi dalam manajemen usaha. Penerapan ipteks yang dilakukan yaitu pelatihan pembuatan abon ikan yang sehat dan tanpa limbah, pembuatan desain kemasan dan analisa kandungan nutrisi produk. Mitra UKM telah mampu dan terampil dalam pembuatan abon yang sehat dan diversifikasi produk kerupuk ikan dari tulang/duri serta kulit. Selain itu mitra UKM juga telah terampil membuat desain dan melakukan pengemasan yang baik.
Guppy fish is one of the ornamental fish commodities that is quite in demand, because of its various types with beautiful colors. The purpose of this study was to determine the effect of adding carrot flour in commercial feed to improve the color quality of guppy fish and the best dose. The test fish used were male guppy fish strain HB red with sizes ranging from 2–3 cm. This research was conducted using an experimental design, namely a Completely Randomized Design (CRD) consisting of five treatments (commercial feed enriched with carrot flour as much as 0%; 2,5%; 5%; 7,5%; 10%) and three replications. The results showed that the addition of a dose of carrot flour had an effect on improving the color quality of guppies and the highest color quality improvement was found in treatment 4 (10% 2 carrot flour) with a chroma value of 3.97±0,18c , while in the control treatment, treatment 1, treatment 2, and treatment 3 got chroma values of 1.26±0.12a, 1.28±0.03a, 1.71±0.06a, 2.72±0.31b. Survival showed the results were not significantly different, that is 100%. Water quality includes an average temperature of 25,5– 26,6?C, pH 7–8, DO 6,7–7,8 mg/L. Key words : HB Red; Carotene; Chroma value; Survival
This study aimed to determine the growth rate and protein content in Nannochloropsis oculata, Chlorella vulgaris, Spirulina platensis were cultured using agricultural fertilizers. The agricultural fertilizers used were Urea, ZA and TSP. Each single cell protein was cultured using the three types of fertilizers with a ratio of Urea: ZA and TSP as follows (A) 1: 2: 1 [(10:20:10 g / L)], (B) 2: 2: 1 [(20:20:10 g / L)] and (C) 3: 2: 1 [(30:20:10 g / L)], respectively. The results showed that the best ratio of Urea, ZA and TSP fertilizers to growth of Spirulina, Nannochloropsis oculata and Chlorella vulgaris was C [30:20:10 (g / L)] treatment. However, phyto-protein content in Nannochlorophsis differed significantly between fertilization treatments, C fertilization yielded the highest protein content (28.75±0.05%), when compared with A (25.13±0.01%) and B (25.14±0.02%), respectively. In Chlorella vulgaris, all fertilization treatments showed very significant differences, B fertilization (28.24%±00.006) yielded the highest phyto-protein content, if compared to A (23.63% ± 0.003) and C (19.74% ±0.006 ), respectively. All fertilization treatments showed very significant differences (P <0.05) on Spirulina platensis. The highest content of phyto-protein (62.68 + 0.05%) was present in treatment C, when compared to A (52.18 + 0.05%) and B (62.37 + 0.01%) treatments, respectively.
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