Swimbladder stress syndrome (SBSS) is associated with malfunction of theswimbladder and is also associated with a combination of handling, high am-bient temperature, high ambient illumination, dense algal bloom that presum-ably cause oxygen depletion at night and supersaturation during the day.
Affected fish larvae show large bubble of gas in the region antero-dorsal to and outside the swimbladder (Fig. 6-2).
EFFECTS ON HOST:
Hyperinflation of swimbladder; high positive buoyancy and mass mortalities.
PREVENTION AND CONTROL:
• Filter rearing water
• Regulate algal bloom in hatcheries
• Provide strong aeration to maintain the larvae beneath the water surface in hatchery tanks