Taura syndrome in Penaeus vannamei
2.5. Some common diseases and their treatments 2.5.8. Taura syndrome – TSV (Taura syndrome in Penaeus vannamei) – Taura syndrome is also called the “red tail” disease.– When shrimp has…
Black gill disease
2.5. Some common diseases and their treatments 2.5.7. Black gill disease * Signs:– Shrimp with this disease often has its gill color changed from ivory white to brown or black…
Curved body disease (Cramp tail syndrome)
2.5. Some common diseases and their treatments 2.5.6. Curved body disease (Cramp tail syndrome) * Signs:Shrimp is cramped; its tail curves towards the abdomen and does not stretch out. *…
Vitamin C deficiency
2.5. Some common diseases and their treatments 2.5.5. Vitamin C deficiency * Signs: Shrimp lacking of vitamin C usually has the following signs: – Black areas appear in shrimp body,…
Soft shell disease in white leg shrimp
2.5. Some common diseases and their treatments 2.5.4. Soft shell disease in white leg shrimp * Signs:Commercial shrimp with soft shell disease often show these signs:– Shrimp with dull color,…
Compounds of nitrogen: ammonia (NH3/NH4+), nitrite (NO2-) and nitrate (NO3-)
Ammonia (NH3/NH4+): Ammonia (NH3/NH4+) occurs because of: • The use of feed for shrimp, fish and aquatic animals • The decomposition of organic matter in water under the affect of…
Algae in aquaculture water
In aquaculture water, there are 5 groups of microorganisms and algae: • Algae – phytoplankton (algae)• Bacteria• Fungal spores (fungi)• Viruses• Zooplankton Common groups of algae in aquaculture ponds: •…
TAN = total ammonia nitrogen
In water, ammonia (NH3) exists in equilibrium with dissolved ammonium ions (NH4+). TAN (total ammonia nitrogen) is the total amount of nitrogen in the forms of NH3 and NH4+ in…
H2S (hydrogen sulfide) of water
H2S (hydrogen sulfide) is a toxic gas, is formed in anaerobic conditions. In water, H2S (gas) exists in equilibrium with the form HS- ion. If pH is low, the form…
Salinity of water in shrimp farming
Salinity of water, measured in g/L, or thousandths (ppt), includes mainly sodium chloride NaCl, and other are calcium salt, magnesium salt, potassium sulphate and bicarbonate salts. Each type of shrimp…