A Study About the Trigger of Feeding of Aurelia Aurita - LunaYamamori

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  • 1. Outline1. Introduction2. Methods3. Results ×24. Discussion
  • 2. Introduction Method Results Discussion Polyp• A form of jellyfish mouth• Attach to something solid• Eat planktons arm
  • 3. Introduction Method Results DiscussionHow do polyps distinguish food fromuneatable things? Previous research: Cordylophora distinguish food by particular amino acid→ Do polyps really distinguishfood only by amino acid?
  • 4. Introduction Method Results Discussion 1. Do polyps really distinguish food only by amino acid? • Peptone : fragment of protein • Glucose : sugar →Expose to 20 polyps
  • 5. Introduction Method Results Discussion Reactions of polyps 25 The number of polyps reacted 20 15 peptone 10 glucose 5 0 1.0×10⁻² 1.0×10⁻³ 1.0×10⁻´ Concentration of each solution( g/L)
  • 6. Introduction Method Results Discussion How do polyps distinguish food from uneatable things?Do polyps really distinguish foodonly by amino acid?→ Yes. Amino acid sugarIs the key amino acid only onekind?
  • 7. Introduction Method Results DiscussionIs the key amino acid only one kind? ・Fermentum http://blog.livedoor.jp/keloinwell/archives/1413914.html ・Peptone(from Experiment1) →Expose to 20 polyps
  • 8. Introduction Method Results Discussion Reactions of polyps 25The number of polyps reacted 20 15 peptone fermentum 10 5 0 1.0×10⁻² 1.0×10⁻³ 1.0×10⁻´ Concentration of each solution ( g/L)
  • 9. Introduction Method Results Discussion The trigger of feeding• Aurelia → Certain kinds of amino acid
  • 10. Introduction Method Results Discussion Conclusion• Amino acid is the trigger of polyp’s feeding• Certain kinds of amino acids trigger the feeding of Aurelia polyps• Could not answer 2nd question ” Is the key amino acid only one kind?”
  • 11. Introduction Method Results Discussion Future Work• Expose polyps to each kind of amino acid ↓Determine the amino acids triggerpolyp’s feeding
  • 12. Thank you for your attendance.
  • 13. Previous researcher C.Fluton used Cordylophora http://flickrhivemind.net/User/djpmapleferryman/Recent
  • 14. membrane( Skin of cell ) →
  • 15. Budded and grown
  • 16. polypmedusa