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D. V. Robertson-Andersson; A. Govender; T. Probyn; C. Halling; M. Troell; J. Bolton & R. Anderson A preliminary investigation into modelling an integrated seaweed ( Ulva lactuca ) & abalone ( Haliotis midae ) system
INTRODUCTION ,[object Object],[object Object],[object Object]
Benefits of a closed system ,[object Object],[object Object],[object Object]
AIMS ,[object Object],[object Object],[object Object]
PROJECT SITES ,[object Object],[object Object],[object Object]
PROJECT DESIGN AT I & J ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Longitudinal profile of tanks Transverse profile of tanks 5 m 1 m
Longitudinal profile of tanks Transverse profile of tanks
Seaweed tank  Pump Gravity feed  Abalone tanks Seaweed tank  80 % recirculation  20 % Sea water  Over flow
PROJECT DESIGN AT JSP ,[object Object]
RESULTS ,[object Object],[object Object],[object Object],[object Object],[object Object],Seaweed uptake
RESULTS ,[object Object],[object Object],[object Object],[object Object],Abalone critical points
Balancing the equations Using linear mass balanced equations Multiple regression of factors Problems putting theory and reality together
RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS pH in a recirculation system pH 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS pH in a recirculation system pH 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS Temperature in a recirculation system Temperature 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS Temperature in a recirculation system Temperature 15  16  20  00  04  08  12  16  20  00  04  08  12  16
RESULTS ammonium levels in  recirculated tanks  range between 0.003 - 0.005  u M N.L -1 ammonium levels in  abalone flow through tanks   = 0.01  u M N.L -1 Ammonium  levels
Major Challenges ,[object Object],[object Object],[object Object],[object Object],[object Object]
The future ,[object Object],[object Object],[object Object]
  THE END 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 Programme

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Integrated Seaweed-Abalone Farming System Model

  • 1. D. V. Robertson-Andersson; A. Govender; T. Probyn; C. Halling; M. Troell; J. Bolton & R. Anderson A preliminary investigation into modelling an integrated seaweed ( Ulva lactuca ) & abalone ( Haliotis midae ) system
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  • 7. Longitudinal profile of tanks Transverse profile of tanks 5 m 1 m
  • 8. Longitudinal profile of tanks Transverse profile of tanks
  • 9. Seaweed tank Pump Gravity feed Abalone tanks Seaweed tank 80 % recirculation 20 % Sea water Over flow
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  • 13. Balancing the equations Using linear mass balanced equations Multiple regression of factors Problems putting theory and reality together
  • 14. RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 15. RESULTS Dissolved oxygen Dissolved oxygen in a recirculation system 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 16. RESULTS pH in a recirculation system pH 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 17. RESULTS pH in a recirculation system pH 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 18. RESULTS Temperature in a recirculation system Temperature 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 19. RESULTS Temperature in a recirculation system Temperature 15 16 20 00 04 08 12 16 20 00 04 08 12 16
  • 20. RESULTS ammonium levels in recirculated tanks range between 0.003 - 0.005 u M N.L -1 ammonium levels in abalone flow through tanks = 0.01 u M N.L -1 Ammonium levels
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  • 23.   THE END 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 Programme