scholarly journals EVALUASIKEBERHASILANPENEBARANIKANBANDENG(Chanos chanos) DIWADUK IR. H. DJUANDA

2017 ◽  
Vol 3 (4) ◽  
pp. 231
Author(s):  
Didik Wahju Hendro Tjahjo ◽  
Sri Endah Purnamaningtyas ◽  
Endi Setiadi Kartamihardja
Keyword(s):  
High Growth ◽  
High Growth Rate ◽  
Fish Culture ◽  
High Potency ◽  
Fish Stocking ◽  
Chanos Chanos ◽  
Stratification Method ◽  
Plankton Bloom ◽  
Local Fisherman

Waduk Ir. H. Djuanda mempunyai potensi pengembangan budi daya ikan yang tinggi, dan pertumbuhan budi daya tersebut berkembang sangat pesat. Perkembangan yang pesat tersebut sangat berdampak pada penurunan kualitas air dan mendorong peningkatan kelimpahan plankton yang sangat tinggi. Oleh karena itu, pemerintah melakukan penebaran ikan bandeng (Chanos chanos) pada bulan Juli sampai Agustus 2008 sebanyak 2.116.000 ekor benih dalam upaya menanggulangi kelimpahan plankton yang tinggi dan sekaligus meningkatkan produksi ikannya. Tujuan penelitian ini adalah untuk mengevaluasi keberhasilan penebaran ikan bandeng di Waduk Ir. H. Djuanda, Purwakarta, Jawa Barat. Penelitian ini dilakukan setiap bulan pada periode bulan Juli 2008 sampai Januari2009. Pengamatan dilakukan denganmetode teratifikasi dengan enamtitik stasiun pengamatan. Evaluasi keberhasilan penebaran ikan bandeng dievaluasi kemampuan memanfaatkan kelimpahan plankton, pertumbuhannya, dan dapat tertangkap kembali.Hasil analisis kebiasaanmakan, ikan bandeng mempunyai kemampuan yang tinggimemanfaatkan kelimpahan plankton di perairan tersebut, dan ikan ini mempunyai laju pertumbuhan yang sangat cepat (K=3.381 dengan L”=45 cm). Ikan bandeng ini dapat tertangkap kembali oleh nelayan setempat pada bulan September 2008 sampai Pebuari 2009 dan juga secara tidak langsung mampu memperbaiki kualitas perairanWaduk Ir. H. Djuanda. Oleh karena itu, dalam upaya peningkatan dampak penebaran ikan bandeng untuk memperbaiki kualitas perairan dan peningkatan kesejahteraan nelayan, maka perlu dilanjutkan penelitian strategi penebaran ikan bandeng dan penguatan kelembagaan nelayan yang ada. Ir. H. Djuanda Reservoir has high potency in developing of fish culture, that the growth has developed very fast. The fast growth of fish culture affected the degradation of water quality and push increasing of plankton abundance. Therefore, government conduct stocking of bandeng on July until August 2008 as much 2,116,000 individual as on effort of overcoming of plankton bloom and increasing of fish production. The aim of this study is to evaluate the successfulness of fish stocking of bandeng (Chanos chanos) in Ir. H. Djuanda Reservoir, Purwakarta, and West Java. The research was conducted every month at period of July 2008 until January 2009. Observation was done by sampling stratification method at 6 point of observation station. Evaluation of successfulness fish stocking base on the ability using of plankton, the growth and percentage of recaptured. The result should that bandeng have high ability inusing of plankton in waters as a feed (97.8%), and this fish had high growth rate (K=3.381 and L”=45 cm). This fish could be recaptured by local fisherman in September 2008 until February 2009. Beside, this bandeng stocking indirectly have been able to improve waters quality of Ir. H. Djuanda Reservoir. Therefore, the effort of increasing impact of bandeng stocking improved waters quality and improvement of fisherman prosperity, thus require to be continued of bandeng stocking and reinforcement institute of local fisherman.

On Stabilization of 3C-SiC Using Low Off-Axis 6H-SiC Substrates

2012 ◽  
Vol 717-720 ◽  
pp. 193-196 ◽  
Author(s):  
Valdas Jokubavicius ◽  
Björn Lundqvist ◽  
Philip Hens ◽  
Rickard Liljedahl ◽  
Rositza Yakimova ◽  
...  
Keyword(s):  
Growth Temperature ◽  
Growth Process ◽  
High Growth ◽  
Potential Method ◽  
High Growth Rate ◽  
Heteroepitaxial Growth ◽  
Bulk Properties ◽  
Combined Use ◽  
Sublimation Growth

Heteroepitaxial growth of 3C-SiC on 0.8 and 1.2 degree off-oriented 6H-SiC substrates was studied using a sublimation growth process. The 3C-SiC layers were grown at high growth rates with layer thickness up to 300 µm. The formation and the quality of 3C-SiC are influenced by the off-orientation of the substrate, the growth temperature (studied temperature range from 1750 °C to 1850°C), and the growth ambient (vacuum at 5*10-5mbar and nitrogen at 5*10-1mbar). The largest domains of 3C-SiC and the lowest number of double positioning boundaries were grown using nitrogen ambient and the highest growth temperature. The combined use of low off-axis substrate and high growth rate is a potential method to obtain material with bulk properties.

scholarly journals PERTUMBUHAN IKAN BANDENG (Chanos chanos) ANTARA BENIH HATCHERY SKALA RUMAH TANGGA DAN GENERASI KEDUA (G-2) TERSELEKSI

2018 ◽  
Vol 17 (1) ◽  
pp. 9
Author(s):  
Daniar Kusumawati ◽  
Zafran Jamaris ◽  
Titiek Aslianti
Keyword(s):  
Growth Hormone ◽  
Growth Rate ◽  
High Growth ◽  
Small Scale ◽  
Quality Level ◽  
Chanos Chanos ◽  
Main Producer ◽  
Rate Research ◽  
Better Than

Currently, there is a national concern regarding to the decrease of milkfish production from ponds in North Java due to a low quality of milkfish seed produced by small scale hatcheries in Bali, which is the main producer of milkfish seed. The quality of seed is strongly related to the quality of eggs (fertility), while quality of eggs produced depends on the management of brood stocks carried out by the hatcheries. Growth rate and growth hormone profiles are some of the biological aspects that could be used as a basis/benchmark to evaluate quality level of milkfish seed reared in ponds. The aim of this experiment was to evaluate growth rate and growth hormone profile performance between selected G-2 seed and small scale hatcheries seed as control population the growth rate. Research on grow-out of milkfish seed was conducted at the IMRAD ponds facility in Pejarakan, using milkfish seed produced by small scale hatcheries as well as selected second-generation (G-2) seed, each with the density of 5000 seed/pond (1 pond=0.5 ha). The seeds were fed with dry pellet and reared for 5 – 6 months. The results showed that the seed produced with standard operational procedure (SOP) by small scale hatcheries were having longer (F hit. = 13.68 > F tabel 1%) and heavier body washt (F hit. = 18.98 > F tabel 1%) better than selected G-2 seed and small scale hatcheries seed without SOP with high growth hormone concentration (F hit. = 4.95 > F tabel 5%).

Influence of Growth Pressure and Addition of HCl Gas on Growth Rate of 4H-SiC Epitaxy

2015 ◽  
Vol 821-823 ◽  
pp. 133-136 ◽  
Author(s):  
Takanori Tanaka ◽  
Naoyuki Kawabata ◽  
Yoichiro Mitani ◽  
Masashi Sakai ◽  
Nobuyuki Tomita ◽  
...  
Keyword(s):  
Growth Rate ◽  
High Throughput ◽  
Defect Density ◽  
High Growth ◽  
High Growth Rate ◽  
Pressure Condition ◽  
High Quality ◽  
Growth Pressure ◽  
Hcl Gas

The reduction of the growth pressure was demonstrated to have the same effect as the addition of chloride-containing gas on preventing the Si nucleation and the epitaxy with high growth rate (>50 μm/h) was achieved by using the decreasing pressure condition in a horizontal CVD reactor without chloride-containing gas. The quality of a 30-μm-thick epilayer grown with 40 μm/h was also investigated. Downfall and triangle defect density in the layer was as low as 0.16 /cm2, indicating that a high quality epitaxial wafer can be easily obtained under the condition with high throughput in the sinple CVD system.

scholarly journals Genetic Resource of Muscovy Duck (Cairina moschata): Profile and Potential Production as Meat Producer

2018 ◽  
Vol 28 (3) ◽  
pp. 129 ◽  
Author(s):  
Hasil Tamsil
Keyword(s):  
Egg Production ◽  
Genetic Resource ◽  
High Growth ◽  
High Growth Rate ◽  
Muscovy Duck ◽  
Short Term ◽  
Term Selection ◽  
Cairina Moschata

Muscovy duck is a type of waterfowl that has a relatively better growth and percentage compared to ducks. Duck meat has high-quality because of its low fat and savory flavor. Muscovy duck is relatively resistant to the disease and is able to use low-quality feed, but has the disadvantage of low egg production. The development of Muscovy duck as a producer of meat can be done through two approaches, namely the long-term and short-term. The long-term approach is carried out by selecting Muscovy duck which has high growth rate and high meet quality. The selection can be done in two ways, namely directly on the nature of growth and the quality of meat, and indirectly by choosing a marker of growth (morphology, biochemistry or diversity of DNA/ RNA). Short-term selection can be done by bringing in superior Muscovy duck from the outside to be developed by farmers and crossing male Muscovy duck with the layer Indian Runner ducks to produce Serati ducks.

scholarly journals Research on the machining process modeling of a rotational mold using CAM applications

2021 ◽  
Vol 343 ◽  
pp. 04006
Author(s):  
Aurel Mihail Ţîţu ◽  
Alina Bianca Pop
Keyword(s):  
Low Cost ◽  
High Growth ◽  
Scientific Paper ◽  
High Growth Rate ◽  
Machining Process ◽  
Rotational Molding ◽  
Molding Process ◽  
Cycle Times ◽  
Break Even Point

Rotational molding is a unique process, with a high growth rate, which allows the use of geometries and materials adapted to particular needs. It is superior to other manufacturing methods in terms of low cost, break-even point and size of parts that can be manufactured. Rotational molding products are often a substitute, with a lower mass, for traditionally used materials. In this scientific paper it is analyzed the recent literature related to the field of rotational molding processes. It also addresses the issue of processing a rotational mold, with the main purpose of optimizing the cutting regime. In this context, it is highlighted the way of processing the surface of the outer mold based on deductions of direct observation criteria. The factors considered in this regard are the route, the type and diameter of the tool, the speed and depth of cutting - given that the goal is to achieve a minimum quality of the required surface obtained by technology and a minimum base time. At the end of the paper, the contribution of this research is highlighted along with the arguments presented in support of the statement that this rotational molding process is of particular interest because it has a great potential to meet many surface quality requirements, while reducing cycle times.

scholarly journals Implanting Melatonin at Lambing Enhances Lamb Growth and Maintains High Fat Content in Milk

2021 ◽  
Author(s):  
José Alfonso Abecia ◽  
Silvia Luis ◽  
Francisco Canto
Keyword(s):  
Growth Rate ◽  
Average Daily Gain ◽  
Survival Rates ◽  
High Growth ◽  
Fat Content ◽  
High Growth Rate ◽  
High Survival ◽  
Melatonin Treatment ◽  
Quality Of Milk

Abstract Background: Recent studies have shown that melatonin implants administered during pregnancy reduced neonatal lamb mortality and produced high survival rates at weaning. This study was designed to quantify the effects of melatonin implantation of ewes and lambs immediately after lambing on the growth of lambs and the quality of milk throughout lactation.Results: In experiment 1, treatment with melatonin the lambs did not have a significant effect on liveweight (LW) (±S.E.M.) at weaning or average daily gain (ADG) until weaning. These results were similar in experiment 2, although lambs reared by melatonin-implanted ewes presented significantly (P<0.05) higher LW at weaning and ADG than did lambs from control ewes. The effect of melatonin implantation of the mothers was particularly evident in male lambs, so that male lambs reared by treated ewes presented significantly higher LW at week 2, 3, and 4 than did male lambs reared by control ewes. The fat content of milk was significantly (P<0.05) higher in implanted ewes than it was in control ewes at day 45 of lactation. Protein and lactose content of milk did not differ significantly between groups. In experiment 3, using artificially-reared lambs, melatonin treatment of the lambs at birth did not have a significant effect on LW at weaning, or ADG. Conclusions: Melatonin treatment of ewes at lambing induced a high growth rate of their lambs and increased the fat content of the milk; however, the direct treatment with melatonin of the lambs at birth did not have an effect in their growth rate.

scholarly journals Features of providing broiler chickens with exchange energy and protein as important indicators of productivity and quality of the obtained products

2019 ◽  
Vol 21 (91) ◽  
pp. 60-64
Author(s):  
L. M. Fijalovych ◽  
Ya.I. Kyryliv ◽  
G. А. Paskevych
Keyword(s):  
Broiler Chickens ◽  
Raw Materials ◽  
High Growth ◽  
High Growth Rate ◽  
Exchange Energy ◽  
Feed Additives ◽  
The Body ◽  
Biologically Active ◽  
Metabolic Energy

The article deals with the possibility of using feed additives in the feeding of broiler chickens and the peculiarities of their effect on the poultry organism. Contemporary data on the biological role of nutrients and energy in the feeding of broiler chickens are presented. The characteristics of the main feeds for poultry and the ways of reducing their prime cost in the conditions of broiler farms are given. The basic principles of effective feeding of poultry with forages of different content of metabolic energy and crude protein are considered, taking into account their assimilation in the body. Provided compound feed recipes and practical tips. It is established that high growth rate of broiler chickens in the start and groove periods (5–39 days) is provided by high-protein compound feeds – 23% (1–2 weeks), 21% (3–5 weeks) and exchange energy of 298 kcal and 305 kcal, respectively. With further cultivation in the finish forage the protein content in the forage decreases and the level of metabolic energy increases (up to 309 kcal). However, for each cross applies its own technology of cultivation and different rates of nutrients in raw materials. It is clear that effective breeding of broiler chickens is not possible without the proper rationing and use of protein and feed energy. Of course, provided that the supply of biologically active substances also corresponds to the normalized amount. Thus, the quality of poultry products is directly dependent on the quality of feed and the efficiency of transformation of feed energy into products.

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