The intensification of fish production provides an ideal environment in which disease-causing organisms can flourish and cause serious damage to productivity. Disease may come from any number of sources, for example, viruses and bacteria. These organisms can spread through vectors such as: fish stocks, staff and visitors, equipment, vehicles and transportation and other aquatic life, birds and animals.
Biosecurity plays an important part throughout every stage of the life cycle of a fish, from hatching through to processing. Biosecurity involves the exclusion of disease-causing organisms from the environment. This is particularly important in fish production. It is achieved by the use of external and internal biosecurity barriers:
External Barriers – blocking the spread of disease onto and off of a fish farm
Internal Barriers – blocking the spread of disease within the fish farm
The correct use and selection of disinfectants is very important and ensures that pathogen challenge is minimized, maximizing the fish’s natural defense against infection.