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Fish Farming

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Fish farming is the main form of aquaculture-the breeding of aquatic species under controlled environments. -There are two types of aquaculture, extensive, and intensive. – PowerPoint PPT presentation

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Title: Fish Farming


1
Fish Farming
2
What is Fish Farming
  • Fish farming is the main form of aquaculture-the
    breeding of aquatic species under controlled
    environments.

3
  • -There are two types of aquaculture, extensive,
    and intensive.
  • -Extensive fish farming takes place in a pond
    like atmosphere.
  • -Intensive fish farming is in a closed
    circulation water system.

4
  • There are also different types of fish farming
  • Integrated recycling systems- plastic pools are
    put in greenhouses, uses local recycled water to
    fill pools. Since it is in a greenhouse, the
    system can adapt almost all climates.
  • Irrigation ditch or pond systems- A pond or
    ditch that can retain water is the main
    requirement for this system. A constant control
    of water quality is crucial to keep the fishes
    electrolyte level correct.
  • Cage system- uses a cage in any type of existing
    water sources. Fish are kept in cage until they
    are ready to harvest.
  • Classic Fry Farming- fish are raised in concrete
    tubes with a constant flow of fresh water running
    through. When ready the fish are released back
    into fresh water.

5
  • There are differences between wild fish and farm
    bred fish.
  • The farm bred fish are much fattier than wild
    fish and contain less protein.
  • Farm bred salmon are fed dye to color them pink,
    otherwise the salmon would be an ugly grey color.
  • Many fishes that are farm bred are fed
    antibiotics and are exposed to many different
    pesticides.
  • Farm raised fish are raised in small compacted
    areas that can result in an increase chance of
    the fish having disease.
  • The farm bred fish also have less amounts of
    omega 3 fatty acids, which is a needed fatty acid
    in our everyday diet.

6
The Effects of Fish Farming
  • Fish farming has many positive as well as
    negative effects.
  • Since the fish live in tight impacted living
    spaces, they are more susceptible to disease. In
    certain fish farms the disease is spread to wild
    fish living in nearby waters.
  • Toxins are stored in fat of the fish, since the
    fish are fed high fat diets they have higher
    level of toxins.
  • Some farm bred fish escape from their farms and
    begin to breed in the wild. Some farm bred fish
    are more aggressive and may chase certain breeds
    from their territory.
  • The Pacific salmon are at a steady decrease in
    population with farm bred fish moving in on
    their territory, the pacific salmon will reach
    the point of extinction at a much faster rate.

7
  • There are small amounts of mercury found in fish.
    Farm bred fish have higher levels of mercury and
    contaminate nearby fish in the local waters.
  • There was a case in Hawaii where after fish farms
    were built two miles off the coast, there was a
    sudden increase in the amounts of sharks in the
    area.

8
Feeding
  • A high quality diet is necisarry to produce the
    highest quality fish possible.
  • From recent advancements there have been new
    commercial balanced feeds that promote optimal
    growth and health of the fish.
  • There is floating and sinking fish feed.
    Floating fish feed stays at the top of the water
    for fish to feed on, while the sinking fish feed
    falls to the bottom for fish at the bottom to
    feed on. This fish feed is an example of
    complete diets.

9
  • There are complete diets and supplemented diets.
  • Complete diets are the most commonly used among
    fish farmers.
  • Complete diets give the fish all they need,
    protein, carbohydrates, fats, vitamins and
    minerals.
  • Fish that are raised in high quantity in small
    spaces must be fed a complete diet
  • Supplemented diets, incomplete or partial diets,
    are intended only to support the natural food
    that is normally available to fish in ponds and
    their natural enviroments.
  • This diet consists of insects, algae, and small
    fish
  • Supplemented diets do not contain enough vitamins
    or minerals, but are fortified with extra
    protein, carbohydrates, and lipids.

10
  • Feeding rates and frequencies play a major part
    in the size and health of the fish.
  • Small larval fish and fry need to be fed a high
    protein diet usually in excess.
  • Small fish have a very high energy demand and are
    needed to be fed almost every hour.
  • The time, season, and temperature affect the time
    when the fish should be fed.
  • As the fish begin to grow the rate at which they
    are fed should be decreased, since the amount of
    protein and food they need is less as they grow
    older.
  • This allows fish growers to use the same feed
    throughout the whole growing process of the fish.

11
  • Fish are fed by hand, automatic feeders, and by
    demand feeders.
  • Many fish feeders like to feed fish by hand to
    assure that they are getting enough nutrients and
    food per day.
  • Automatic feeders can sometimes be inaccurate and
    not provide enough feed for the fish.
  • Demand feeders require the fish to hit a trigger
    to get food.
  • There is a small trigger that when fish swim by
    and hit, the feeder releases a small amount of
    food. If the fish do not trigger the feeder
    enough, the fish will not get enough food, that
    is why hand feeding the fish is the best way to
    feed the fish.

12
Benefits of Fish Farming
  • Due to the increase in demand of fish products,
    fish farming and aquatculture can relieve the
    stress off wild fish.
  • By breeding fish in a controlled environment
    people can produce a larger quantity and control
    the quality of fish that are produced.
  • There is a growing demand for fish oils and fish
    products.
  • It will relieve pressure from wild fish. Since
    we are breeding fish in farms, the need to fish
    wild fish will decrease.
  • Farmed fish provides a cheaper alternative for
    impoverished countries.
  • Fish Farming could help reduce starvation since
    food prices have been increasing recently.
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