Potential Effects of Cultural eutro phi cation on cage culture in Lakes and Reservoirs in Nigeria

摘要

Freshwater cage culture is an aquaculture production system where fish are grown from fry to table size in cages or enclosures that are fixed, floating or submerged in lakes, reservoirs, rivers or streams. Cages are usually enclosed on all sides withmesh netting and the complete system often includes materials such as PVC pipes, bamboo, wood, used tyres, plastic or steel drums, weights and anchors (mooring) and ropes. Cage fish culture involves simple technology in operation and management and can use locally available and cheap materials for construction. Water exchange occurs between the water body and the cages.