ENV100Y5 Lecture Notes - Lecture 31: Mariculture, Wild Fisheries, Eutrophication

• School: UTM
• Department: Environment
• Course: ENV100Y5
• Professor: Barbara Murch

Document Summary

What is aquaculture: the farming of aquatic organisms in inland and coastal areas, involving intervention in the rearing process to enhance production and the individual or corporate ownership of the stock being cultivated. (fao) Includes fish, molluscs, crustaceans, aquatic plants (567 species worldwide: both offshore and inland important, marine (mariculture) or inland (usually freshwater) Increase in aquaculture is a response to declining wild fisheries: fully exploited we are taking all excess being produced, over exploited we"re taking away more than they regenerate, depleting them. Aquaculture is a huge economic engine for developing countries. Closed pond systems: covered to allow for control of light and temperature; limit predator access, usually smaller in scale than open ponds. Tuna cages in tahiti a tender services the cages twice daily. Mollusc (clams, oysters) aquaculture has relatively low impacts because no supplemental food is required.