Judul: Uji coba penggunaan pelet yang mengandung Imunoglobulin-Y (IG-Y) anti koi herpesvirus sebagai pencegah penyakit pada ikan mas (Cyprinus carpio carpio)
Abstrak: The objective of this research was to observe effective dose in conducting common carp passive immunization and to reduce disadvantage of carp breeders. This research uses 100 common carps which weight is 50 grams each, and treatment groups based on negative control, low dose 5% (w/w) Ig-Y, and high dose 20% (w/w) Ig-Y. The treatmen of the Ig-Y was applied on its pellet and was given within 14 days and 28 days. The treatment data was taken after the serum test, challenge test, Polymerase Chain Reaction, and then analyzed descriptively. The serum test indicated that cross reaction was shown in low dose 5% (w/w) Ig-Y treated at 14 days. Challenge test on 5% (w/w) treatment shows good survival rates. PCR test shows a negative results in sick carp gills sample. Passive immunization of Ig-Y anti KHV in fish pellet able to reduce KHV infection and mortality which effective dose is 5% (w/w) for 14 days.
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Judul: Efektivitas vaksin DNA anti-KHV pada benih ikan mas Cyprinus carpio melalui metode perendaman dan perlakuan hiperosmotik
Abstrak: Common carp production has decreased since the mass deaths caused by disease of koi herpesvirus (KHV). Therefore, safe technique is needed and can be applied in bulk with cost efficient. The purpose of this research was verified influence of DNA vaccine anti-KHV with dose of 1,3 x 108 cfu / mL was performed through immersion in different duration after hyperosmotic treatment for 2 minutes treatment to produced the resistence common carp. There were six treatments with three replications, A: vaccination for 60 minutes immersion, B: 90 minutes, C: 120 minutes, positive control: fish were not vaccinated and infected with KHV, negative control: fish not vaccinated and were not infected with KHV, control bacteria: fishes that soaked with bacteria did not containing vaccine. The results showed that vaccination for 60 minutes giving highest relative survival (93.55%). Thus, vaccination by immersion and hyperosmotic treatment effectively improve the survival and relative percent survival of fish, and this method can be an alternative in the early control of KHV infection in common carp and koi.
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Judul: Kajian Atmosfer Bawah Wilayah Tropis dan Subtropis
Abstrak: Planetary Boundary Layer is the lowest part of the atmosphere directly affected by the earth’s surface and responds to surface forcings within a time period of hourly to daily. The thickness of boundary layer varies over space and time, ranging from hundreds of meters to a few kilometers. The objective of this study consist of the analysis of Boundary Layer based on diurnal and nocturnal vertical profiles of meteorological properties and identification of characteristics pertaining to tropical atmosphere (represented by Soekarno-Hatta (6.110S, 106.650E), Polonia (3.560N, 98.680E), and Da Nang (16.030N, 108.200E) stations) and subtropical atmosphere (represented by Perth (31.930S, 115.960E), Nanjing (32.000N, 118.800E), and Hakasskaja (43.780N, 87.620E) stations). Virtual potential temperature, specific humidity, wind speed and direction, atmospheric stability, and Bulk-Richardson number are used to estimate the boundary layer thickness. Vertical profile of the virtual potential temperature and specific humidity are used to determine the Mixed Layer heights during the day and Residual Layer heights during the night. On the other hand, the mean value of Turbulent Flow Thickness is derived from the vertical profile of the Bulk-Richardson number (RiB). Analytical results of this study revealed that Mixed Layer height in the tropical atmosphere varies in a range from 260 m to 1410 m, Residual Layer height varies in a range from 267 m to 925 m, whereas the Turbulent Flow Thickness variation is confined between 0 m to 335 m. In subtropical atmosphere Mixed Layer height varies in a range from 101 m to 1483 m, Residual Layer height varies in a range from 121 m to 1276 m, whereas the Turbulent Flow Thickness variation is confined between 0 m to 769 m. This study also revealed that, except during summer, Mixed Layer Heights in the tropics are normally higher than in the subtropics.
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