|
|
Aquaculture |
| Ponds
& Raceways |
Catfish |
Bass
& Panfish |
Trout |
Shrimp | |
 Whether fish are
raised for commercial sale, personal consumption or
sport, aquatic plant populations can be managed within a
system to optimize fish production. This may range from
virtual eradication of growth within cement-lined trout
raceways to maintenance of moderate planktonic algal
blooms on catfish ponds. A limited amount of underwater
cover is desired in warm-water ponds to act as a nursery
for young fish, however, too much will lead tostunting
of panfish.
Underwater growth and filamentous
algae cannot be tolerated at all in commercial ponds
which are harvested by seining. Respiration or die-off
and decomposition of large aquatic plant populations
during prolonged periods of cloudy weather or under
snow-covered ice can critically deplete dissolved oxygen
concentrations. Summerkill or winterkill of fish is the
result. Some off-flavors in fish flesh have also been
attributed to algal growth. In addition, environmental
stress caused by excessive plant growth may make fish
more prone to disease and parasitic
infestation. | |
| | |
