Fish Farming (triple)

describe diet in fish farms

• fish are fed frequently but in small amounts to prevent food waste

• fish are fed high protein to increase growth of fish

describe inter-specific competition and how it can be reduced

• competition between different species

• reduced by keeping fish in different cages/nets

describe intra-specific competition and how it can be reduced

• competition within the same species

• reduced by separating fish of different ages/size

describe disease in fish farming

• diseased fish are removed immediately

• antibiotics are added to kill pathogens and increase survival chance

• overcrowding is avoided to reduce risk of disease

describe O2 levels in fish farming

• O2 is bubbled through water

• aquatic plants are used to increase O2 levels as they photosynthesize and release O2

• increasing O2 increases respiration which means more growth

• dead fish/waste is removed to reduce decomposers that would respire and decrease O2 levels

describe how water quality is maintained

• water is filtered to remove faeces, waste and harmful bacteria which would cause disease