hepatopancreas and abdominal muscle, had loose
shells and grew slower than shrimp in other groups.
In fact, the most severely infected shrimp were
very weak due to microsporidians having infested
most of the hepatopancreas and other vital organs.
Therefore, damage of the hepatopancreas and other
vital organs could have resulted in decreased
feeding, metabolism and growth of the shrimp.
When the shrimp were 75-105 days old, the
prevalence of infected shrimp from cast-net
sampling decreased because they gradually had
died off or been consumed by the healthy shrimp.
After shrimp were harvested at day 120, the
production and survival rate were related to the