Muscle Necrosis
Muscle necrosis in shrimp is caused by temperature and salinity shock, low oxygen levels, overcrowding, rough handling and severe gill fouling.
SIGNS:
Affected shrimp show opaque white areas on the abdomen (Fig. 6-3); blacken-ing on the edges of the uropod followed by erosion and liquid-filled boils at the tip of uropods in advanced stages; “wood grain” appearance of abdominal muscle in postlarvae (Fig. 6-4).
EFFECTS ON HOST:
There is a gradual death of cells of affected parts leading to erosion especially in the tail. This may then serve as portal of entry for secondary systemic bacte-rial infection.
PREVENTION AND CONTROL:
Reduce stocking density and improve water quality by daily water change (5-10%)
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