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BIOL - Fish Farming

Biology, fish farming - IGCSE | IBDP | DSE | GCE | IAL | AP Biology

July 12, 2019

Fish farming is a method in which fish are raised in tanks or enclosures to be consumed as food.

☝️ This is how fish farming 🐟 may look like in the sea ☝️

Why do we do fish farming and not traditional farming?

  1. Fish farmers can control the age, size, health and quality of fish.
  2. It is possible to raise fish with desired characteristics through selective breeding.
  3. By controlling the number of fish to be raised, fish farming can reduce the risk of overfarming. 
  4. There is a guaranteed regular supply of fish all year round.
  5. Fish farming is safer for fishermen than traditional farming.

Things to Consider for Fish Farming

  • Since large numbers of fish are kept in a confined space, fish may fight with each other. To avoid the competition, fish may need to be separated into different compartments.
    • Intraspecific predation: Competition between individual fish of the same species is prevented by separating fish of similar sizes and age.
    • Interspecific predation: Competition between fish of different species is prevented by separating different species into different compartments. 
  • Potential disease or infection need to be controlled.
    • Antibiotics can be used.
    • Dead fish should be removed quickly.
    • It is possible to use biological control to remove pests.
  • The oxygen level in the water needs to be monitored.
  • Water is filtered to remove any waste products, such as feces.
  • Fish are fed frequently but in small amounts to allow rapid growth but prevent overeating. The diet is also rich in protein.
  • Fish raised in fish farms may be the products of selective breeding, so it is possible to raise fish with desired characteristics, such as fish with larger size.