CULTIVATION OF ULVA IN AQUACULTURE EFFLUENT A preliminary investigation
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This presentation was given to the concil members of the recirculation council for Southern Africa in 2004. It lists reasons why Ulva is a good candidate for cultivation in aquaculture effluent.
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CULTIVATION OF ULVA IN AQUACULTURE EFFLUENT A preliminary investigation
- 1. D. V. Robertson-Andersson; A. Govender; T. Probyn; C. Halling; M. Troell; J. Bolton & R. Anderson CULTIVATION OF ULVA IN AQUACULTURE EFFLUENT A preliminary investigation Recirculation Council Meeting 2004
- 8. 0 1 2 3 4 5 6 7 8 sea shaded sea fert shaded fert abalone shaded abalone SGR % day -1 J J A S O N D J F M A M J J A S O RESULTS OF 2000 - 2003 SGR of Ulva from June ‘01 to October ‘02 in sea, fertilized & abalone effluent water. (2) where water exchanges increased at I & J 2
- 9. RESULTS RGR of Ulva from June ‘01 to October ‘02 in sea, Turbot & abalone effluent water at JSP.
- 11. RESULTS Myrionema strangulans (MS) BAD INFECTION DEAD HEALTHY INFECTED
- 12. RESULTS MS infestation of Ulva thalli
- 16. RESULTS Tissue Nitrogen vs. Thallus Colour Tissue nitrogen vs. thallus colour
- 17. RESULTS Tissue Nitrogen vs. Tissue Phosphorus Tissue N vs. Tissue P A S O N D J F M A M J J A
- 19. Longitudinal profile of tanks Transverse profile of tanks 5 m 1 m
- 20. Longitudinal profile of tanks Transverse profile of tanks
- 21. Seaweed tank Pump Gravity feed Abalone tanks Seaweed tank 80 % recirculation 20 % Sea water Over flow
- 24. Balancing the equations Using linear mass balanced equations Multiple regression of factors Problems putting theory and reality together
- 25. RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 26. RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 27. RESULTS pH in a recirculation system pH 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 28. RESULTS pH in a recirculation system pH 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 29. RESULTS Temperature in a recirculation system Temperature 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 30. RESULTS Temperature in a recirculation system Temperature 15 16 20 00 04 08 12 16 20 00 04 08 12 16
- 31. RESULTS ammonium levels in recirculated tanks range between 0.003 - 0.005 u M N ammonium levels in abalone flow through tanks = 0.01 u M N Ammonium levels
- 34. THANK YOU ACKNOWLEDGEMENTS I would like to extend special thanks to the following people and organizations without whose help this project would be impossible: I & J Mariculture farm particularly N. Loubser, H. Otto and L. Ansara JSP Mariculture farm particularly K. Ruck N R F Swedish and South African Collaborative Program Kelp Products JSP