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Enhancing Aquaculture with Microalgae Cultivation

Learn how microalgae can improve aquaculture by managing water bodies, providing food, and reducing the need for chemical fertilizers. Explore successful colonization methods and the benefits of using different types of microalgae. Follow an experiment to monitor phytoplankton changes in a shrimp tank through sample collection, cell counting, and identification using a microscope. Discover key results and insights for optimizing aquaculture practices.

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Enhancing Aquaculture with Microalgae Cultivation

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  1. Microalgae in aquaculture Pablo Gonzalez-Alanis

  2. Microalgae in aquaculture • Manage a body of water • Provide more food • Chemical fertilizers, organic materials (manures), suplemetary diet

  3. Microalgae in aquaculture • Successful colonization • Light to provide energy • Inorganic nutrients • Water Temperature

  4. Microalgae in aquaculture • Bacillariophyta • Cyanophyta • Dinophyta • Euglenophyta

  5. Microalgae in aquaculture • Experiment objective: • Observe the changes in the phytoplankton colony in a shrimp tank

  6. Microalgae in aquaculture • Samples collection • Cell counting • Identification

  7. Samples collection • 3 tanks made of plastic liner (23 m2 aprox) • 50 shrimps/ m2 • Commercial pelleted feed (25 % of total shrimp biomass) daily

  8. Samples collection • Collected weekly • Analyzed (identificated and counted)

  9. Cell counting • Standar compound microscope with 10, 20 and 40 X magnification objectives • Haemacytometer

  10. Cell counting

  11. Identification • Key to the major groups (Divisions) of phytoplankton in northern Queensland prawn ponds (after Bellinger 1992) Stafford C. 1999.

  12. Results • Synechocystis

  13. Results • Coscinodiscuss

  14. Results • Gymnodium

  15. Results • Navicula

  16. Results • Agmenellum

  17. Thanks...

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