Ward_Lect28A_Bilateria_ppt

Ward_Lect28A_Bilateria_ppt - BIS2C Winter 2010 (Ward)...

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BIS2C Winter 2010 (Ward) Lecture 28. Bilateria Today’s second lecture (26 February) postscript to Cnidaria introduction to Bilateria more on animal development formation of mesoderm, body cavity bilaterian diversity Monday’s lecture Mollusca
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Mutualism between: (1) sea anemone (2) anemonefish (clownfish) Cnidarian postscript: what we have learned from Nemo
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Why is the anemonefish not harmed by the sea anemone? 1. The fish is immune to the toxins of the nematocyst. 2. The sea anemone voluntarily refrains from discharging the nematocysts when the fish is present. 3. The fish produces compounds that inhibit firing of the nematocysts. 4. The fish hovers just outside the firing range of the nematocysts.
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The mucus of the anemonefish contains chemicals that deter firing of the nematocysts. Could this have any human application?
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Jellyfish stings are a serious problem.
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Jellyfish stings are a serious problem. a single jellyfish tentacle is loaded with massive numbers of stinging cells >2000 nematocysts will penetrate one square millimetre of human skin during contact with a jellyfish tentacle
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Playing the clown A concept based on the understanding of the jellyfish stinging mechanism and clownfish protection is behind the development of dual sun/sting protection technology. Amit Lotan and Naomi Dahan explain how From: April 2006 issue of Soap, Perfume and Cosmetics
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From web site of a skin products company (http://www.godivaskincare.com/store/pages.php?pageid=13): If a Clownfish can play hide-and-seek unharmed by marine stingers, why can't swimmers? Clownfish have a protective coating that neutralizes the firing mechanism in the stinging cells. After ten years of extensive biotechnological research by Israeli scientists, it is now possible to protect yourself against the stings of most jellyfish, jellyfish larvae, coral and sea anemone. Godiva Safe Sea contains the same blend of ingredients that coat the Clownfish…
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Cnidarian postscript: what we have learned from Nemo
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Ward_Lect28A_Bilateria_ppt - BIS2C Winter 2010 (Ward)...

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