Aquaculture and Management of Fish Production

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Aquaculture and Management of Fish Production
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Aquaculture and Management of Fish Production

• Aquaculture
• the production and husbandry of aquatic animals
  and plants in a controlled environment.

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Aquaculture and Management of Fish Production

• Cage culture contains the aquatic animals or
  plants in a small area of a pond
• Fish can be monitored better for growth rates and
  feeding purposes
• Water quality must be monitored to insure that
  the fish are not stressed or killed since fish
  cannot move to other sections of the pond during
  stressful weather conditions

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Cage Culture
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Aquaculture and Management of Fish Production

• The difficulty in managing an aquaculture
  production system is directly related to the
  density of fish, etc in the system

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Aquaculture and Management of Fish Production

• Water quality must be closely monitored when
  raising fish.
• Recirculation tanks process waste water through a
  biological filter and return it to the growing
  area.

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Aquaculture and Management of Fish Production

• Many types of fish are adapted to aquaculture
  systems
• Trout are adapted to systems in cold, running
  water
• Catfish, Striped Bass, and Tilapia also are
  important species

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Aquaculture and Management of Fish Production

• Dissolved oxygen levels in any fish system can
  become so low that fish die.
• Dissolved oxygen levels are lowest in early
  morning.
• Aerators are used to improve oxygen levels during
  dry, hot periods.

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Types of Aquaculture Operations

• Hatcheries
• Fertilize and hatch eggs of local native species
  and rear the young until they are suitable for
  release.
• Hatcheries supply fry or larvae to units for
  fingerling production.

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Types of Aquaculture Operations

• Ranching - applies to salmon.
• Involves hatching eggs and rearing young in a
  manner that imprints them on a privately
  controlled homing area, then releasing them to go
  out to sea and grow up.
• When they mature they will return to the homing
  area, where they can be harvested

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Types of Aquaculture Operations

• Cage or pond rearing (farming)
• fish or crustaceans are moved from a hatchery to
  rearing cages and held at high densities until
  they have grown to marketable size.

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The production

• Part of a recirculation aquaculture system.

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The production

• Rotating Biological Contactor
• a biofiltration system which treats waste water
  before it recirculates.

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The production

• Automatic Feeders

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• Hauler used to transport fish

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Aquaculture Operations in the World
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Aquaculture facility near Great Barrier Reef
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Maritimes Atlantic Salmon cage
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Eastern US cages
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More eastern US cages
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Cages in France
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Harvesting from a French rearing pen
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Mollusk culture in Tasmania