scholarly journals Efektivitas Ekstrak Tepung Testis Sapi dalam Alih Kelamin Ikan Nila, Oreochromis niloticus L. Melalui Teknik Perendaman (The Effectiveness of BTME (Bull Testes Meal Extract) in Sex-Reversal of Tilapia through Immersion Technique)

2014 ◽  
Vol 4 (1) ◽  
pp. 27-34
Author(s):  
Andri Iskandar ◽  
M. Zairin Junior ◽  
Harton Arfah
Keyword(s):  
Environmental Sustainability ◽  
Oreochromis Niloticus ◽  
Natural Compound ◽  
Negative Impact ◽  
Survival Rates ◽  
Sex Reversal ◽  
Male Fish ◽  
Potential Alternative ◽  
Survival And Growth ◽  
Synthetic Steroids

Synthetic steroids are commonly used to sex-reverse tilapia to produce male tilapia commercially, but gradually feared a negative impact on food security and environmental sustainability. The use of new natural compound is a potential alternative to be explored, one of which is bull testes meal extract (BTME). This study aimed to evaluate the effectiveness of BTME immersion and optimal concentrations for sex-reverse tilapia to produce monosex male tilapia, and its influence on survival and growth of fish. The study consisted of 5 treatments with 3 replications: immersion treatment with BTME concentration of 1 ml l-1 (A), 3 ml l-1 (B), 5 ml l-1 (C), immersion treatment in 17α-methyltestosterone of 500 µg l-1 (K+) and without hormone immersion treatment (K-). Hormone immersion was performed on tilapia larvae aged 4 and 7 days after hatching.The fish were then maintained for 60 days. The parameters observed were: the percentage of male tilapia and intersex tilapia, survival rates, and growth rate of fish. BTME immersion for sex-reverse the tilapia larvae have significant effect on masculinization of tilapia. The highest percentage of male fish was obtained on treatment C (85.56%) and was not significantly different from K (+) (81.11 %). Immersion of tilapia in BTME or 17α-MT did not affect the survival and growth of tilapia fish.Keywords: sex reversal, bull testes meal extract (BTME), tilapia

Use of Dissolved Glucose on Cultured Media on the Survival Rate, Growth Rate and Stress Resistance of Saline Tilapia Larvae (Oreochromis niloticus)

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Muh. Ali Imran ◽  
Yuni Maharani ◽  
Hardiati Marding ◽  
Andi Dahlia ◽  
Muh. Yusri Karim
Keyword(s):  
Growth Rate ◽  
Oreochromis Niloticus ◽  
Survival Rates ◽  
Optimum Dose ◽  
Once Daily ◽  
South Sulawesi ◽  
Randomized Design ◽  
Engineering Technique ◽  
Survival And Growth ◽  
Brackish Water Aquaculture

Saline tilapia fish is a result of technology engineering technique that is tolerant with brackish waters and sea with salinity ≥ 20 ppt. The main problem in the development of saline tilapia is the availability of seeds because the resulting synthesis is still low. One effort to overcome the problem of low tilapia salinity this is by providing dissolved organic material such as glucose. Glucose plays an important role as a source of energy for animals including tilapia. The aim of this research is to determine the optimum dose of dissolved glucose to the survival and growth of salt tilapia larvae (Oreochromis niloticus). The research was conducted from March to May 2017 at Brackish Water Aquaculture (BPBAP) Takalar, South Sulawesi. The research container using 25 L plastic volume basin amounted to 15 pieces. The test animals used were 7-day saline tilapia larvae of 0.03 gram sized for 20 days. The glucose used is pure glucose in powder form. The study was designed using a complete randomized design consisting of 5 treatments and each having 3 replications. The five treatments are 0, 50, 100, 150, 200 ppm per day added to the once-daily research container that is the morning. The result of variance analysis showed that soluble glucose administration had significant effect (p <0.01) on the synthesis and growth rate of saline tilapia fish. The highest survival rates and growth rates were achieved at 100 ppm doses of 94.44% and 14.93% / day respectively, while the lowest at doses of 0 ppm were 74.81% and 11.85% / day respectively.Keywords: glucose, salin tilapia, survival, growth rate 

scholarly journals PERFORMA IKAN NILA (Oreochromis niloticus) HASIL SEX REVERSAL, GENETICALLY MALE DAN YY PADA FASE PENDEDERAN PERTAMA

2016 ◽  
Vol 4 (1) ◽  
pp. 33 ◽  
Author(s):  
Odang Carman ◽  
Aulia Saputra ◽  
Alimuddin Alimuddin ◽  
Maskur Maskur ◽  
Dian R Herdianto ◽  
...  
Keyword(s):  
Survival Rate ◽  
High Performance ◽  
Sex Reversal ◽  
Fish Growth ◽  
Control Fish ◽  
Male Fish ◽  
Potential Alternative ◽  
Fish Group ◽  
And Control ◽  
Aquaculture Production

Penelitian ini dilakukan untuk mengkaji performa ikan nila hasil sex reversal (SRV), genetically male tilapia (GMT), dan YY pada fase pendederan pertama di akuarium. Benih ikan dipelihara selama 22 hari, dari umur 6 hari hingga 28 hari. Parameter yang diamati meliputi tingkat sintasan, persentase ikan jantan, laju pertumbuhan, dan biomassa. Hasil penelitian menunjukkan bahwa tingkat sintasan tidak berbeda (P>0,05) antar ketiga kelompok ikan dan kontrol (KN), berkisar antara 85,30%--86,20%. Persentase ikan jantan antara SRV (94,5% ± 1,32%) vs. GMT (93,8% ± 1,25%) dan GMT vs. YY (90,2% ± 1,83%) tidak berbeda (P>0,05), sedangkan antara SRV lebih tinggi daripada YY (P<0,05). Persentase ikan jantan pada ketiga kelompok ikan tersebut lebih tinggi (P<0,05) dibandingkan dengan KN (56,9% ± 3,62%). Pertumbuhan ikan YY dan GMT lebih cepat (P<0,05) dibandingkan dengan ikan SRV dan kontrol (KN). Bobot rata-rata ikan YY pada akhir penelitian mencapai 485 mg, ikan GMT 456 mg, ikan SRV 379 mg dan kontrol 342 mg. Produksi biomassa ikan YY, GMT, dan SRV masing-masing sebesar 41,3%; 32,9%; dan 10,3% lebih tinggi dibandingkan dengan KN. Dengan performa yang tinggi dan pertimbangan teknis di lapangan, benih GMT merupakan alternatif yang baik untuk dibudidayakan dalam rangka meningkatkan produksi ikan nila.The experiment was conducted to determine the performance of sex reversed (SRV), genetically male tilapia (GMT), and YY tilapia on first nursery phase in aquarium. Fry were reared for 22 days, from 6 to 28 days-old. Survival rate, percentage of male fish, growth rate and biomass were observed. The result of the study showed that survival rate among fish group and control were similar (P>0.05), ranged from 85.30%-86.20%. Percentage of male fish between SRV (94.5% ± 1.32%) versus GMT (93.8% ± 1.25%) and GMT versus YY (90.2% ± 1.83%) were also similar (P>0.05), while SRV is higher than YY (P<0.05). Percentage of male fish in the three fish groups was higher than that of control (56.9% ± 3.62%). Growth of YY fish and GMT were higher compared to SRV and control fish (KN). The mean weight of YY fish at the end of the experiment reached 476 mg, GMT fish 447 mg, SRV fish 379 mg and control 342 mg. Biomass of YY, GMT and SRV fish were respectively higher by 41.3%, 32.9%, and 10.3% compared to control. With high performance and technical consideration in farm, GMT fish can be a potential alternative to be cultured in fish farm in order to increase aquaculture production of nile tilapia.

scholarly journals Effect of 17 Aplha Methyl Testosterone on Sex Reversal of Oreochromis Niloticus Fry

2021 ◽  
Vol 2 (3) ◽  
pp. 01-05
Author(s):  
Elsadig Hagar
Keyword(s):  
Oreochromis Niloticus ◽  
Survival Rates ◽  
Sex Reversal ◽  
Average Weight ◽  
Plastic Container ◽  
Oral Application

The effect of oral application of three concentrations of 17 α methyl testosterone (17 α-MT) in sex reversal of Oreochromis niloticus fry was studied. About 1,200 day one O. niloticus larvae with an average weight of 0.002g distributed into 12 plastic container (each 14L capacity). The experiment consisted of four treatments and three replicates for 17 α-MT application in stage one, and 12 happa (1m×1m×1m) in stage two for fry rearing. The male% increased significantly (p<0.05) with increase of 17 α-MT concentration. T1 (63%) yielded 84%; T2 (78.3%) yielded 87% and T3 (86.7%) yielded (89%). Survival rates significantly decreased (p<0.05) with the increase of 17 α-MT level (T3, T2 and T1, respectively). The proved that oral application of 17 α-MT is useful in sex reversal and production of male of O. niloticus.

scholarly journals Toxicity of mercury (Hg) on survival and growth rate, hemato- and histopathological parameters ofOreochromis niloticus

2013 ◽  
Vol 11 (1) ◽  
pp. 38 ◽  
Author(s):  
Kukuh Nirmala ◽  
Yuni Puji Hastuti ◽  
Vika Yuniar
Keyword(s):  
Growth Rate ◽  
Oreochromis Niloticus ◽  
White Blood Cells ◽  
Survival Rates ◽  
Aquatic Organisms ◽  
Growth And Survival ◽  
Randomized Design ◽  
Test Fish ◽  
Survival And Growth ◽  
Haemoglobin Content

<p>Heavy metals are serious pollutants of the aquatic environment because of their environmental persistence and ability to be accumulated by aquatic organisms. <em>Oreochromis niloticus </em>exposed to 0, 0.16, 0.5, and 1.0 ppm Hg for 30 days. The aim of this study was to determine the influence of mercury in water on survival rate, growth rates, hematological, and histological parameters of <em>Oreochromis niloticus</em>. This study was conducted from Mei to June 2009. The experimental design was arranged in completely randomized design with four treatments and three replications. Stock density was 8 fish/aquarium with mean initial body weight was 15.70±1.13 g. Growth and survival rates of test fish were decreased with increasing the Hg concentration. Red blood cell (RBC) count, haematocrit content, and haemoglobin content decreased when compared to the control. The number of white blood cells (WBC) increased in mercuric treated fish. The results are statistically significant at p&lt;0.05 level.</p> <p>Keywords:mercury, survival and growth rate, hematology, histopathology, <em>Oreochromis niloticus</em></p>

scholarly journals Efficacy of inhaled nitric oxide in neonates with hypoxic respiratory failure and pulmonary hypertension: the Japanese experience

2018 ◽  
Vol 46 (6) ◽  
pp. 657-663 ◽  
Author(s):  
Satoshi Suzuki ◽  
Hajime Togari ◽  
Jim L. Potenziano ◽  
Michael D. Schreiber
Keyword(s):  
Nitric Oxide ◽  
Pulmonary Hypertension ◽  
Respiratory Failure ◽  
Negative Impact ◽  
Survival Rates ◽  
Oxygenation Index ◽  
Inhaled Nitric Oxide ◽  
Preterm Neonates ◽  
Therapeutic Trial ◽  
Hypoxic Respiratory Failure

AbstractObjective:To analyze data from a registry of Japanese neonates with hypoxic respiratory failure associated with pulmonary hypertension (PH) to compare the effectiveness of inhaled nitric oxide (iNO) in neonates born <34 weeks vs. ≥34 weeks gestational age (GA).Materials and methods:iNO was administered according to approved Japanese product labeling. Study data were collected before iNO administration and at predefined intervals until discontinuation.Results:A total of 1,114 neonates were included (n=431, <34 weeks GA; n=675, ≥34 weeks GA; n=8, missing age data). Mean decrease from baseline oxygenation index (OI) was similar in both age groups. OI reduction was more pronounced in the <34 weeks subgroups with baseline OI ≥25. Survival rates were similar in the <34 weeks GA and ≥34 weeks GA groups stratified by baseline OI (OI<15, 89% vs. 93%; 15≤OI<25, 85% vs. 91%; 25≤OI≤40, 73% vs. 79%; OI>40, 64% vs. 66%).Conclusion:iNO improved oxygenation in preterm neonates as effectively as in late preterm and term neonates, without negative impact on survival. If clinically significant PH is present, as measured by pulse oximetry or echocardiography, a therapeutic trial of iNO might be indicated for preterm neonates.

scholarly journals Effects of substrate availability and competing vegetation on natural regeneration of white spruce on logged boreal mixedwood sites

2018 ◽  
Vol 48 (4) ◽  
pp. 324-332 ◽  
Author(s):  
Nicola A. Kokkonen ◽  
S. Ellen Macdonald ◽  
Ian Curran ◽  
Simon M. Landhäusser ◽  
Victor J. Lieffers
Keyword(s):  
Picea Glauca ◽  
Natural Regeneration ◽  
Negative Impact ◽  
Mineral Soil ◽  
Soil Surface ◽  
White Spruce ◽  
Solid Wood ◽  
Seedling Mortality ◽  
Competing Vegetation ◽  
Survival And Growth

Given a seed source, the quality of available substrates is a key factor in determining the success of white spruce (Picea glauca (Moench) Voss) natural regeneration. We examined the influence of substrate and competing vegetation on survival and growth of natural regeneration of white spruce up to 4 years following harvesting in deciduous-dominated upland boreal mixedwood sites. Feather moss, thick soil surface organic layers, litter, and solid wood were poor substrates for establishment. Early successional mosses establishing on mineral soil, thin organics, and rotten wood were generally favourable microsites but were not highly available on postharvest sites. Mineral soil substrates were not as suitable as expected, likely because on a postlogged site, they are associated with unfavourable environmental characteristics (e.g., low nutrient availability, exposure). There was some evidence that survival and growth of seedlings were improved by surrounding vegetation in the first years, but heavy competing vegetation had a negative impact on older seedlings. Burial by aspen litter greatly increased seedling mortality, especially when combined with a brief period of submergence due to heavy spring snowmelt. The results provide insight into conditions under which natural regeneration could be an option for establishing white spruce following harvesting of deciduous-dominated boreal mixedwood forests.

Crude glycerol in diets for Nile tilapia sex reversal (Oreochromis niloticus, Linnaeus 1758)

2015 ◽  
Vol 47 (8) ◽  
pp. 2682-2685 ◽  
Author(s):  
Fábio Meurer ◽  
Aldo Tovo Neto ◽  
Lilian Carolina Rosa da Silva ◽  
Luana Cagol ◽  
Marise Taise Theisen ◽  
...  
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Crude Glycerol ◽  
Sex Reversal

Effects of initial age and size on sex reversal of Oreochromis niloticus fry using methyltestosterone

Aquaculture ◽  
1993 ◽  
Vol 112 (4) ◽  
pp. 301-308 ◽  
Author(s):  
Ana E. Hiott ◽  
Ronald P. Phelps
Keyword(s):  
Oreochromis Niloticus ◽  
Sex Reversal

scholarly journals The Growth and Survival of Various Forms Androgen Sex - Reversal Oreochromis niloticus Cultured Using Hapas in Concrete Tank

2021 ◽  
Vol 5 (1) ◽  
pp. 1-5
Author(s):  
Omoike A ◽  
Keyword(s):  
Oreochromis Niloticus ◽  
Sex Reversal ◽  
Same Sex ◽  
Growth And Survival ◽  
Uniform Growth ◽  
Technological Means ◽  
Concrete Tank

The production of same sex Oreochromics niloticus to enhance better and uniform growth for Tilapia culture has called for technological means using sex-reversal hormones Methyl Testosterone (MT), this study will look into the percentage growth and survival of Oreochromics niloticus fry.

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