FISH FARMING B3 AQA GCSE

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  • FISH FARMING
    • OVER FISHING
      • over fishing is a problem when more fish are being caught than the remaining can reproduce
        • this means the population of fish will decrease
    • FISH FARMING
      • this is a solution to the problem of over fishing
      • in fish farming, fish are kept in cages. this confines space. to reduce competition fishes of different sexes are separated along with age
      • ADVANTAGES
        • water quality is controlled
        • the cages protect the fish against predators
        • frequent feeding allows for rapid growth
        • confined spaces means that the fish move less so they use less energy on respiration
        • other competing species are kept out
    • DISADVANTAGES
      • to maintain sterile water, pesticides and antibiotics need to be used to control disease. this could lead to antibiotic resistance
      • large amounts of waste produced by fish has to be removed often this may damage the ecosystem in the area
    • greater risk of disease as fish may be closely related (selective breeding) and they also live close together.

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