5.9 explain the methods which are used to farm large numbers of fish to provide a source of protein, including 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 selective breeding.

Fish are attractive product for farmers as they have low fat and high protein. Also they are efficient at turning their nutrient to fish mass.

Advantages:

·      Fish farming allows us to control the quality of water

·      We can control predators

·      We can reduce pests and other forms of disease

By controlling all of these factors we contribute to the increase in the yield of fish.

Disadvantages:

·      However when you have a high density of fish, then the possibility is for the transition of disease. Because of this some fish farmers have taken to using antibiotics this is a concern for human health

·      The abundance of fish within the fish farms increase the abundance of pest, so some fish farmers have taken to using pesticides, this also is a cause for concern among humans.