Swimbladder stress syndrome (SBSS) - Fish Diseases

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.

SIGNS:

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