ABSTRACT
Aquaculture is an economically based activity relying on ecological and biological processes in that it is dependent on their management and manipulation. Aquaculture combines a wide range of biological and ecological research, the significance of which depends on the species. There are many consequences of the various human activities on aquatic ecosystems and altering one factor is bound to have an effect on many others. Aquaculture sets in play biological and ecological processes within the natural ecosystem and allows their manipulation to the benefit of man in ways including: biological production for economic purposes; biological and chemical depuration; biological recycling and protection against further human-derived pollution. The interactions between aquaculture and fisheries also include the use of fishmeal from industrial fisheries to produce the diet fed to fish in intensive culture systems. Aquaculture provides the access to large numbers of juvenile marine fish, molluscs and crustaceans, for example, and to salmon in their marine phase; these are normally unobtainable.
