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1. Waqas Mohyuddin
Roll number 1307014-089
M.Sc Zoology 4th semester
Presentation on raceway culture

2. Raceway culture
Flowing water is diverted from natural streams or a well.
Raceways are typically used for raising rainbow trout. To be
considered a low-risk method, waste must be treated and
fish escapes prevented.

3. Advantages of raceways
• higher stocking densities
• improved water quality
• reduced manpower
• ease of feeding
• ease of grading
• ease of harvest
• precise disease treatments
• collection of fish wastes

4. Types of Raceways
• Concrete
• Stone
• Earth
• Fiberglass
• Polyester resin
Raceway Structures
• Structure should be like that where…..
• Water should be move easily
• Must be attached with
• Stream
• River
• Canal

5. Raceway pond
• Different raceway ponds available like for
• Fry culture
• Marketable production of trout
• Brood stocking

6. raceway
Raceway pond
Canal or river
inlet
outlet

7. • Fry culture
o Depth should be 30cm
o Slope should be 1/100
o Width of raceway 1.5m
o Length of raceway should be 10-20m
o Inlet and outlet should be cover with gauze
• Market production
o Depth should be 60cm
o Slope should be 1/100
o Width should be 3m or less
o Length 10-30m
o Inlet or outlet according to the fish size to escape from pond
• Brood stocking
• Depth not less than 90cm. Slope 1/100. Width 2m Length 20-40m

8. Concrete silo
• Used for trout production
• Diameter 2-10m
• Bottom slope 5-10% for waste removal
• Outlet located in center of concrete silo

9. Requirement of system
• Water supply
• Aerations
• Removal of solid waste matters
• Productivity
• Waste water treatment
Water supply
• Jet nozzle
o Provide force
o Water movement
o Above surface of water
o Or below to water
o Not at bottom because they uplift waste

10. Aerations
• Aeration compulsory for dissolved oxygen
• Different mechanism used like
o Pumps
o Agitators
o Blower
Removal of solid waste
• Waste accumulation spoil water quality waste removed by
o Sucking machine
o Increase water flow
o Water velocities over 7-8cm/sec are found to be effective for
the waste removal
o Lowered water level down to 30 cm in depth makes the
removal more effective

11. Productivity
• Productivity of fish is strongly related with exchanging rate of
the culture water
• Rainbow trout, it amounts 1㎏/year under water flowing rate
of 1ℓ/min.
• Productivity increases up to 5kg/year under same water
flowing rate in case that best management is offered.
References
• Buttner, J.et al. (2008). "Freshwater Aquaculture Species for
the Northeast“. Northeaster Regional Aquaculture Center
(NRAC), University of Maryland, Publication No. 102-2008.
Accessed 29.9.2011.
• Raceway Culture for Freshwater Species". Korea – U.S.
Aquaculture. Accessed 29.9.2011.