Benefits of fish farming

• Most fish are still caught in the wild (i.e. in the open ocean or in freshwater rivers and lakes)
• However,?overfishing?has lead to dramatic?declines?in many fish populations
• Fish farms?are ways of?raising large numbers of fish?in a?small space?to provide?food (protein) for humans
• This has several advantages over wild-caught fish, including:
  • The ability to?selectively breed fish?to ensure high quality, fast-growing fish
  • The ability to?protect against predators
  • The ability to?control water quality?(many wild-caught fish have significant levels of pollutants such as mercury in their flesh)
  • The ability to?control feeding?to ensure rapid growth

   

Methods used in fish farms to ensure high yield

• Within fish farms, large numbers of fish are kept in freshwater or seawater enclosures and are carefully monitored and controlled in many different ways
• This helps to ensure high yields (fast growth of healthy fish)
• The methods used include:
  • The control (and maintenance) of?water quality
  • The control of?intraspecific?predation
  • The control of?interspecific?predation
  • The control of?disease
  • The control (and removal) of?waste products
  • The control of the?quality?and?frequency?of?feeding
  • The use of?selective breeding

   

Fish Farming Methods Table

转载自savemyexam