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Ru Runion nion Is Islan land d Prese resentation ntation - PowerPoint PPT Presentation

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Ru Runion nion Is Islan land d Prese resentation ntation Bio-indication In Runion Island How to determine the water quality of a river ? I Thanks to fish II Thanks to macro invertebrates I - Fish INDIAN OCEAN Reunion

  1. Réu Réunion nion Is Islan land d Prese resentation ntation

  2. Bio-indication In Réunion Island How to determine the water quality of a river ? I – Thanks to fish II – Thanks to macro invertebrates

  3. I - Fish

  4. INDIAN OCEAN Reunion island Fish migration

  5. Larvas Growth Reproduction and larval life

  6. Differents methods of sampling

  7. How to know Reunion island rivers quality through the study of fish population ? Reference Characteristics models Station to be qualified Sampling with GOOD OR NOT ? electricity

  8. II- Macro invertebrates

  9. St-Etienne River

  10. Take macro invertebrates in the river

  11. Find the macro invertebrates

  12. Observation & Indentification

  14. Taking Photos Midge Larva

  15. Caddisfly Larva

  16. Dragonfly Nymph

  17. Give a quality mark for the river 8 Points 1 Point

  18. 4 points 3 Points 3 Points

  19. Mark 4 + 6 + 8 + 1 = 19

  20. Interpretation : Our rivers seem to be in a good condition! But here we only studied micro-invertebrates.

  21. Conclusion : Micro-invertebrates : GOOD STATE. But what about fishes and micro-flora? In Reunion island : 3 BIO-INDICATORS: - Macro-invertebrates BAD INDICATOR - Fishes BAD INDICATOR - Micro-flaura GOOD INDICATOR

  22. Macro-invertebrates : Really good Good So so Bad Really bad Worst Better No changes No information about 2012 Really good Worst Good Better So so No changes Bad No information Really bad about 2012

  24. : Fish Worst Better No information about 2012 Really good Worst Good Better So so No changes Bad Really bad

  25. Micro-plants : Really good Worst Good Better So so No changes Bad Really bad

  26. Thank you

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