5.9: Explain the Methods which are Used to Farm Large Numbers of Fish to Provide a Source of Protein, Including the Maintenance of Water Quality, Control of Intraspecific and Interspecific Predation, Control of Disease, Removal of Waste Products, Quality and Frequency of Feeding And the Use of Selectively Breeding.

FISH FARM: A Place where Large Numbers of Fish are Bred for Commercial Purposes to Provide a Source of Protein

METHODS TO FARM LARGE NUMBERS OF FISH:

METHOD	EXPLANATION
MAINTENANCE OF WATER QUALITY	Water is Filtered to Remove Waste and Harmful Bacteria to Prevent Diseases. Water is also Cleaned to Maintain High Levels of Oxygen for Aerobic Respiration
CONTROL OF INTRASPECIFIC PREDATION	Intraspecific Predation: Competition Within the Same Species Fishes are Separated by Size and Age to Prevent Competition (So they Do Not Eat Each Other) using Nets
CONTROL OF INTERSPECIFIC PREDATION	Interspecific Predation: Competition Between Different Species Different Species of Fishes are Separated by Fences, Nets and Tanks
CONTROL OF DISEASE	Antibiotics are Given to Fishes to Increase Resistance to Diseases, Increasing the Chances of Survival. They are also Kept in Small Numbers to Minimise the Spread of Diseases
REMOVAL OF WASTE PRODUCTS	Water can be Filtered to Remove Waste Products such as Faeces and Sewage. Fences, Nets and Tanks are Cleaned or Location of Fish can be Changed to Ensure Clean Water
QUALITY AND FREQUENCY OF FEEDING	Fishes are Fed Food that are Nutritious to Ensure Growth. They are Fed Frequently but in Small Amounts so they Do Not Overeat or Start Eating Each other
USE OF SELECTIVE BREEDING	Selective Breeding is Used by Farmers to Only Allow Fishes with Desired Characteristics to Reproduce and Pass on Gene to Produce Fish that Grows as Fast as Possible