scholarly journals 22. PENGARUH UMUR LARVA IKAN NILA (Oreochromis niloticus) TERHADAP PENINGKATAN PENJANTANAN MENGGUNAKAN HORMON METHYL TESTOSTERONE (MT) ALAMI Effect of Tilapia (Oreochromis niloticus) Age in Masculinization Process Using Methyl Testosterone (MT) Natural Hormones

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Rosmaidar R
Keyword(s):  
Key Words ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Average Percentage ◽  
Natural Hormone ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Male Sex ◽  
Natural Hormones

This research aims to know the influence of larvae of nile tilapia (Oreochromis niloticus) age on masculinization process by the administration of methyl testosterone (MT) natural hormones. This research used 270 nile tilapia larvae divided into 3 age of groups: 5 days (PI), 10 days (PII), and 20 days (PIII), with three repetitions. Larvae were dipped in MT natural hormone for 20 days then reared until age of 60 days, followed by observations of fish sex. The average percentage of male-sex of tilapia fish after dipping with methyl testosterone natural hormone on group PI, PII, and PIII were 68.07%, 66.47%, and 57.29%, respectively. It can be concluded that the age of larvae do not affect the percentage of masculinization process of nile tilapia fish. ____________________________________________________________________________________________________________________ Key words: larvae tilapia, masculinization, methyl testosterone natural hormone

scholarly journals The Effect of Dipping Time in Natural Methyl Testosterone Hormone on Male Forming Succesiveness Process of Tilapia (Oreochromis niloticus) Larvae

2014 ◽  
Vol 10 (2) ◽  
Author(s):  
Rosmaidar Rosmaidar ◽  
Dwinna Aliza ◽  
Jesica Ramadhanita
Keyword(s):  
Statistical Analysis ◽  
Oreochromis Niloticus ◽  
Control Group ◽  
Forming Process ◽  
Average Percentage ◽  
Treatment Groups ◽  
Natural Hormone ◽  
Male Sex ◽  
Banda Aceh ◽  
Dipping Time

The purpose of this research was to know the influence of dipping time in natural methyl testosterone hormone (MT) on successful male forming process of tilapia (Oreochromis niloticus) larvae. This research used 360 7 days old tilapia larvae, purchased from cultivation of brackish water, Ujung Batee, Banda Aceh. The samples were divided into 4 treatment groups with three repetitions, they were P0 (control group without treatment), PII (Tilapia larvae were dipped in natural MT for 10 hours), PII (Tilapia larvae were dipped in natural MT for 20 hours), and PIII (Tilapia larvae were dipped in natural MT for 30 hours). All tilapia larvae were maintained until the age of 60 days, before the sex of the fish examined. The average percentage of male tilapia in group P0, PI, PII, and PIII were 50.28, 87.77, 90.06, and 95.05%, respectively. Statistical analysis showed that there were significant differences (P0.05) among P0, PI, PII, and PIII. Based on result of this research, it can be concluded that the longest dipping time the highest the percentage of male tilapia.Key words: larvae, tilapia, natural hormone methyl testosterone, the male sex percentage

The effect of vaccination in controling bacterial disease caused by Aeromonas hydrophila in nile tilapia (Oreochromis niloticus)

2014 ◽  
pp. 27
Author(s):  
Arne A Ratulangi ◽  
Reiny Tumbol ◽  
Hengky Manoppo ◽  
Henneke Pangkey
Keyword(s):  
Survival Rate ◽  
Aeromonas Hydrophila ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Bacterial Disease ◽  
Immersion Method ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Different Ages ◽  
Motile Aeromonas Septicaemia

This study aims to apply vaccination against bacterial disease. The purpose of vaccination is to trigger the immune respone both non-specific and specific of fish against bacteria Motile Aeromonas Septicaemia (MAS) caused by Aeromonas hydrophila. The vaccination for fish with different ages: 2-3 weeks and 5 weeks were done using immersion method. The fish were re-vaccinated (booster) after two weeks of the first vaccination. The survival rate was < 50 % for juveniles 2-3 weeks and > 50% for juveniles 5 weeks. Survival rate for juveniles 5 weeks was higher than juveniles of 2-3 weeks. This shows that organs of juveniles of 5 weeks were more complete than the 2-3 weeks juveniles. The age of fish is one of the important factors for successfully vaccination. Penelitian ini bertujuan untuk melakukan penerapan vaksinasi terhadap penyakit bakterial. Vaksinasi ditujukan untuk merangsang respon kekebalan non- spesifik dan spesifik pada tubuh ikan terhadap penyakit Motile Aeromonas Septicaemia (MAS) yang disebabkan oleh bakteri Aeromonas hydrophila. Vaksin diberikan pada benih ikan nila yang berbeda umur yaitu 2-3 minggu dan 5 minggu dengan menggunakan metode perendaman. Ikan divaksinasi ulang (booster) setelah 2 (dua) minggu dari vaksinasi yang pertama. Prosentase kelangsungan hidup < 50 % untuk benih umur 2-3 minggu dan > 50% untuk benih umur 5 minggu. Jumlah kematian benih umur 2-3 minggu lebih tinggi dari 5 minggu. Hal ini menunjukkan bahwa fungsi organ benih umur 5 minggu telah lebih lengkap dari pada benih umur 2-3 minggu. Umur ikan merupakan salah satu faktor penting penentu keberhasilan suatu kegiatan vaksinasi.

Effect of low temperature on genomic DNA methylation in Nile tilapia (Oreochromis niloticus)

2013 ◽  
Vol 37 (10) ◽  
pp. 1460 ◽  
Author(s):  
Huaping ZHU ◽  
Maixin LU ◽  
Zhanghan HUANG ◽  
Fengying GAO ◽  
Xiaoli KE ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Low Temperature ◽  
Oreochromis Niloticus ◽  
Genomic Dna ◽  
Nile Tilapia ◽  
Nile Tilapia Oreochromis Niloticus
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