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Predator Evasion Behavior of Argopecten irradians Triggered By Chemo-tactic Sensory Systems

Predator Evasion Behavior of Argopecten irradians Triggered By Chemo-tactic Sensory Systems . Sheila Hood Steve Lyons. I Hope You Dance…. Who can make you dance?. Mr. Blue Crab?. Lightning Whelk?. Horse Conch?. Pear Whelk? Or maybe (gasp!)…. The Ultimate Predator:

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Predator Evasion Behavior of Argopecten irradians Triggered By Chemo-tactic Sensory Systems

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  1. Predator Evasion Behavior of Argopecten irradians Triggered By Chemo-tactic Sensory Systems Sheila Hood Steve Lyons

  2. I Hope You Dance…

  3. Who can make you dance? Mr. Blue Crab?

  4. Lightning Whelk?

  5. Horse Conch?

  6. Pear Whelk? Or maybe (gasp!)…

  7. The Ultimate Predator: J.dutrowii

  8. Sammy, you’re just a shell of your former self!

  9. See? Smell? Feel? Tentacle Eye

  10. Hypothesis: Do scallops use visual cues to sense their predators? Prediction: When scallops are presented with the sight of predators, they will use evasive swimming actions to escape.

  11. Scallops show no fear!

  12. Including Sunblock, the sting ray shadow machine

  13. Pre-trials narrow the field

  14. Mainlining essence of tulip

  15. Respond, spineless one, respond!

  16. Slimy things did crawl upon the slimy sea

  17. Essence of Fasciolaria Available for $299.99/ounce

  18. Hypothesis: Scallops use chemo-tactile tentacles to sense their predators. Prediction: When scallop’s tentacles are touched with predator essence, they will use evasive swimming actions to escape.

  19. N = 10 90% 80% 40% 0%

  20. Hypothesis: Scallops use chemo-tactile tentacles to sense their predators. Prediction: When scallop’s tentacles are touched with predator essence, they will use evasive swimming actions to escape. Results support!

  21. But then we also noticed… React, you spineless wimp!

  22. Hypothesis: Scallops will “habituate” to a predator’s stimulus and will not respond to further stimuli during a defined latency period. Prediction: After responding to a predator’s chemotactile stimulus with a swim response, a scallop will not respond again until a latency period has passed.

  23. % 20% Time Delay After 1st Exposure (Min.) Figure 1. Percent of Argopectens irradians exhibiting evasion response to second exposure to chemotactile stimulus by F. tulipa secretion

  24. Hypothesis: Scallops will “habituate” to a predator’s stimulus and will not respond to further stimuli during a defined latency period. Prediction: After responding to a predator’s chemotactile stimulus with a swim response, a scallop will not respond again until a latency period has passed. Results support and suggest latency period!

  25. Summary • Scallops use a chemo-tactile sensory system to sense certain predators and respond with a swim response. • Neither presence of the predator nor predator essence in solution elicited the swim response. • There is a latency period after a swim response elicited chemo-tactically during which another response will not be elicited.

  26. Further questions: *Essence reaction when together, but not alone? *Social facilitation? *Would the latency effect hold for different stimuli?

  27. We would like to thank… Fasciolaria tulipa Argopecten irradians

  28. As well as… The think tank Cinematographer-in-chief

  29. And finally… Editor-in-Chief Predator-in-Chief

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