Production of Nile tilapia Oreochromis niloticus reare d in a limited water exchange system: The effect of different light levels

Aquaculture ◽  
2021 ◽  
pp. 736912
Author(s):  
Mohammad Hossein Khanjani ◽  
Moslem Sharifinia
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Water Exchange ◽  
Exchange System ◽  
Light Levels ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Limited Water Exchange

scholarly journals Polyculture and growth of the Nile tilapia Oreochromis niloticus (Perciformes:Cichlidae) with shrimp Litopenaeus vannamei (Decapoda:Penaeidae) in sea water

2013 ◽  
Vol 5 (2) ◽  
pp. 241-244
Author(s):  
A.A. Ortega-Salas ◽  
L.A. Rendón M. ◽  
R. Beltrán-Alvarez ◽  
A. Tintos-Gómez
Keyword(s):  
Litopenaeus Vannamei ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Water Exchange ◽  
Sea Water ◽  
Total Biomass ◽  
Feed Conversion ◽  
Biomass Density ◽  
Commercial Fish ◽  
Nile Tilapia Oreochromis Niloticus

Globally, the tilapia is the second most important group of commercial fish. Polyculture and growth were studied for 181 Nile tilapia, Oreochromis niloticus, in a seawater pond (30-37‰) at a density of 50 fish/m3 for six months (October to April) with 30 shrimp Litopenaeus vannamei at a density of 8 shrimp/m3 in two months (December-February) in an open tank of 3,6 m3. They were fed Camaronina”pellets” at libitum in the morning. The pond bottom was siphoned every other day, was maintained with constant aeration. Water exchange was 80% every two weeks. The temperature varied from 18 to 32oC. The tilapia grew from 72mm to 220mm, and 7g to 232g, survival was 92%. The total biomass was 38,6 kg. The shrimp grew from 6,8 g to 11,5 g and 102mm to 121mm. The survival rate was 100%. Total biomass was 219g. The feed conversion ratio (FCR) was 1,3:1,0 in both species. There was no problem between species; this polyculture is recommended.KEY WORDSPolyculture, growth, Litopenaeus vannamei, Oreochromis niloticus, biomass, density

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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