3 key factors to be considered in selecting a site for aquaculture
Water source, water quality, climate, soil, infrastructure (road), electricity, near to market, land
Discuss 3 areas inside a hatchery system.
Water Intake & Treatment, Tank & Pond Layout, Larval Rearing Systems, Drainage & Waste Management, Backup Systems
2 effects of poor site selection
Disease outbreaks, Water pollution, Poor fish growth & survival, High operational costs
What is cage system?
Confines fish / shellfish - mesh enclosure - open aquaculture system.
What is hatchery?
A place for artificial breeding, egg hatching, and rearing across the early life stages of aquatic animals.
3 key factors to be considered in selecting a site for cage culture.
Water depth > 5 m; water wave & current; water quality; Protection from environmental hazards, Infrastructure and accessibility, Infrastructure
3 basic components of cage system.
Floats, Collar/Case frame, Nets; Anchoring/mooring system
3 criteria when selecting the fish species for cage culture.
High value – market demand Hardy (can culture in high density and disease resistant) Fast growth in confined waters Availability supply of seed
2 advantages of cage culture.
Resource use flexibility, Low initial investment, Simplified cultural practices, Simplified harvesting, Multi-use of water resources
2 disadvantages of cage culture
Complete diets needed, Diseases, Water quality problem, Vandalism and poaching, Limited production, Predation
Discuss 2 human errors in cage culture.
Choosing ponds with pre-existing problems (if cage in pond). Poor cage construction. Stocking undersized or poor quality fingerlings. Stocking too many fish
