Use of Stochastic Programming in Least-cost Feed Formulation for African Catfish (Clarias gariepinus) in Semi-intensive Culture System in Nigeria

2011 ◽  
Vol 6 (4) ◽  
pp. 447-455 ◽  
Author(s):  
I.U. Udo ◽  
C.B. Ndome ◽  
P.E. Asuquo
2016 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Syahrizal Syahrizal ◽  
Muarofah Ghofur ◽  
. Safratilofa ◽  
Rahmat Sam

AbstractThe feed as a source of energy for the growth of fish is a component of the most important costs 40-89% and the quality should be good. The solution is through research. Research in the form of meal cassava leaves (Monihot utilissima) parents as a source of alternative protein substitute for fish meal in feed formulation catfish (Clarias gariepinus). The design used Complete Random Design with 4 treatments and 3 repetitions. The results showed that for the growth and the survival between treatments were not significant (P <0.5), meaning that all treatments were no differences can be categorized and feed ingredients of flour cassava leaves can replace most of the presence of meal fish  in fish feed formulas African catfish. Growth of the best catfish are on treatment A (55% meal cassava leaf: 00% fish meal) with daily growth of 8.27 grams was 2.61% and the B (40%% meal cassava leaves: 15% meal fish) 5.28 gram with daily growth is 1.86%, followed by C (15%%  meal cassava leaves: 15% meal fish ) 1:51% and D (0% meal cassava leaves : 55% meal fish ) 1:33%. Catfish survival rate was not significant (P <0.5), and relatively equally well A (96.17%), B (94.77) and C (95.92) and the best in treatment for D (96.37 ). As users are advised to wear formulations in treatment B (40% meal fish and 15%  meal cassava leaves old). Keywords: Catfish, Ffeed, Meal fish, Meal cassava leaves AbstrakPakan sebagai sumber energi bagi pertumbuhan ikan  merupakan komponen biaya yang paling besar 40-89%  dan kualitasnya harus baik. Solusinya melalui penelitian. Penelitian berupa tepung daun  singkong (Monihot utilissima) tua sebagai sumber protein alternatif penganti tepung ikan dalam formulasi pakan ikan lele (Clarias gariepinus). Rancangan digunakan Rancangan Acak Lengkap dengan 4 perlakuan dan 3 kali ulangan. Hasil penelitian menunjukan bahwa untuk pertumbuhan dan kelulusan hidup antar perlakuan tidak signifikan (P < 0,5), artinya semua perlakuan  tidak ada perbedaan dan dapat dikatagorikan bahan pakan dari tepung daun singkong dapat mengantikan sebagian keberadaan tepung ikan dalam formula pakan ikan lele dumbo. Pertumbuhan ikan lele terbaik terdapat pada perlakuan A (55% tepung daun singkong : 00% tepung ikan) 8,27 gram dengan pertumbuhan harian adalah 2.61% dan  pada B (40%  % tepung daun singkong : 15% tepung ikan) 5,28 gram dengan pertumbuhan harian adalah 1.86%, diikuti C (15% % tepung daun singkong :15% tepung ikan) 1.51% dan D (0 % tepung daun singkong : 55% tepung ikan) 1.33%. Tingkat kelangsungan hidup ikan lele tidak signifikan (P < 0,5), dan  relatif sama baiknya A (96,17%), B (94,77) dan C (95,92) dan terbaik pada perlakuan untuk D (96,37). Sebagai pengguna disarankan memakai formulasi pada perlakuan B (40% Tepung ikan dan 15% tepung daun singkong tua). Kata kunci: Ikan lele, Pakan, Tepung ikan, Tepung  Daun Singkong Tua


Author(s):  
Dyah Anggraeni ◽  
Nurlela Nurlela

Background: Natural preservatives are compounds produced by natural ingredients that can suppress bacterial growth and development. Natural preservatives are carried out because most of the preservatives circulating are chemicals and unsafe for the body. One of the natural preservatives is by using garlic extract (Allium sativum L).  Objective: This study is aimed to determine the effectiveness of the antibacterial garlic (Allium sativum L) as a natural preservative in fresh African catfish (Clarias gariepinus).  Method: This research used the Pour Plate iroculation method. African catfish (Clarias gariepinus) which is soaked with garlic (Allium sativum L) with a concentration of 7%, 14% and 21% for 30 minutes, then the fish will be kept at room temperature with a storage period of 24 hours and 48 hours and calculated growth in bacterial numbers with the Colony counter.  Result: Based on the research result, it was found that garlic extract (Allium sativum L) can obstruct the effectiveness of antibacterial in African catfish (Clarias gariepinus) at a concentration of 14%.


2010 ◽  
Vol 9 (1) ◽  
Author(s):  
Lutfi Lutfi

<p><em>Effect of four types of diluents</em><em>s</em><em> and four concentration of DMSO (5%, 10%, 15% and 20%) against the motility of African catfish sperm were evaluated after storage at freezing temperatures. </em><em>The steps in preparation the 16 treatments combination of the diluents</em><em> </em><em>are </em><em>preparation of diluents, mixing </em><em>diluents </em><em>with DMSO, packing </em><em>of semen </em><em>in</em><em>to</em><em> 0.3-ml straw, equilibration of </em><em>semen </em><em>at 4 °C for 30 minutes, freezing </em><em>of </em><em>semen in nitrogen vapor liquid </em><em>at </em><em>a height of 6.5 cm for 10 minutes</em><em>,</em><em> and subsequent</em><em>ly</em><em> storage of </em><em>semen </em><em>in liquid nitrogen (-196</em><em> <sup>0</sup></em><em>C) for further analy</em><em>sis</em><em> </em><em>of </em><em>post-thawing motility (PTM). </em><em>The result showed that t</em><em>he highest level of motility of spermatozoa </em><em>was </em><em>in </em><em>treatment </em><em>P</em><em><sub>1</sub></em><em>D</em><em><sub>15 </sub></em><em>(45.7 ± 4.3%) and the lowest </em><em>was </em><em>in </em><em>treatment </em><em>P<sub>2</sub>D<sub>20</sub> (14.5 ± 13.2%). The best diluent </em><em>in </em><em>this observation </em><em>was </em><em>diluents containing NaCl, KCl, CaCl<sub>2</sub> and NaHCO<sub>3</sub>. The best concentration </em><em>was </em><em>DMSO 15%. While the best interaction between the concentration of DMSO diluents is P<sub>1</sub>D<sub>15</sub> treatments containing NaCl, KCl, CaCl <sub>2</sub> and NaHCO<sub>3</sub> with a combination of 15% DMSO concentration. </em><em>The </em><em>conclusion </em><em>of the research is that </em><em>diluents containing NaCl, KCl, CaCl<sub>2</sub> and NaHCO<sub>3</sub> with a combination of 15% DMSO concentration</em><em> can be used in </em><em>cryopreservation of African catfish semen</em><em>.</em></p>


2012 ◽  
Vol 16 (2) ◽  
pp. 83-98 ◽  
Author(s):  
Shadia Kadry ◽  
Afnan Amer ◽  
Mohamed Marzouk ◽  
Magdy Hanna ◽  
Amal Azmy ◽  
...  

2021 ◽  
Vol 744 (1) ◽  
pp. 012054
Author(s):  
N T M Pratiwi ◽  
B Widigdo ◽  
A Yasin ◽  
J Soffyan ◽  
A Iswantari ◽  
...  

2011 ◽  
Vol 19 (6) ◽  
pp. 1025-1034 ◽  
Author(s):  
Ali Karami ◽  
Annie Christianus ◽  
Hadi Zokaeifar ◽  
Khairul Zamri Saad ◽  
Fahmi T. J. Imraan ◽  
...  

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