FISH CULTURE

requirements in the cultivation of freshwater fish In cultivating fish in the pool or pond there are some requirements that need to be known, including among others : 1. Water Sources In the selection of places to fish farming need to pay attention to water resources . These water sources must be sufficient and adequate . These water sources can come from rivers , irrigation flow , as well as springs. water source available throughout the year as far as possible with adequate discharge . one example in a goldfish requires a water supply with a debit 10-16 liters / sec / ha . 2. Soil type and slope in building a pool should pay attention to soil type and slope . ponds are built should have a clay type of soil or sandy loam (sandy clay ) so it is not porous . The slope of the land used for fish culture should have a slope of 50-10 degrees and water conditions will thus facilitate the drainage of wat

Shrimp Disease: Disease Yellowhead Cause: Yellow Head Virus (YHD), corona-like RNA virus (genus Okavirus, family Ronaviridae and the order Nidovirales) Bio - Ecology of Pathogens: • Krustase sensitive to infection with this virus include: Penaeus monodon, P. merguensis, P. semisulcatus, Metapenaeus ensis, Litopenaeus vannamei, etc.. • Shrimp black tiger shrimp is a very sensitive species, in acute cases can result in the death of up to 100% within 3.5 days since the first clinical symptoms appear. • Transmission occurs horizontally through the water shrimp or cannibalism to feed a sick or infected. • Post larvae (PL) shrimp aged <15 days relative resisters against infection with this virus compared with 20-25 days old PL or juveniles. • The molecular (DNA sequencing) from products of reverse-transcription polymerase chain reaction (RT-PCR) of yellow head virus have similarities to the gill-associated virus (Gav), although different species or strains. Clinical Sympto