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Re: Starfish regeneration ... I assume you asking why sometimes when one star fish leg is damaged or cut off then the animal grows back two legs rather than one. Assuming yes then no one knows for sure but I would think that the answer lies in the mechanisms and genes the star fish has for growing back limbs.
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www.askabiologist.org.uk/punbb/viewtopic.php?id=218
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Lots of articles on google search using "Brittle Starfish Regeneration"; Ummm, don't know about why leg fell off. Have seen before when starfish dying and beginning to disintegrate. Maybe trying to clone self? How about a tank pic post...
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www.3reef.com/forums/inverts/brittle-star-lost-leg-4517...
www.3reef.com/forums/inverts/brittle-star-lost-leg-45170.html
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Many abnormalities of regeneration are known among insects – a mantis has, for example, been known to grow a leg where an antenna had been lost. One frequently sees starfish with one or more arms missing.
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www.daviddarling.info/encyclopedia/R/regeneration.html
www.daviddarling.info/encyclopedia/R/regeneration.html
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I have read that at one time oyster fishermen used to dredge up starfish from their oyster beds, chop them up in the hope of killing them, and then dump the parts back overboard. They soon discovered to their sorrow the remarkable powers of regeneration of these animals.
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users.rcn.com/jkimball.ma.ultranet/BiologyPages/R/Regen...
users.rcn.com/jkimball.ma.ultranet/BiologyPages/R/Regeneration.html
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Regeneration can be defined as the natural ability of living organisms to replace worn out parts, ... In some animals like starfish, some part of the body is broken off on being threatened by a predator. This phenomenon of self-mutilation of the body is called autotomy ... Crabs break off their leg on approaching of the enemy...
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www.tutorvista.com/content/biology/biology-iv/growth-re...
www.tutorvista.com/content/biology/biology-iv/growth-regeneration-ageing/regeneration.php
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But if you cut off a starfish's leg, it grows a new one, and that leg can grow into an entirely new starfish. Traditional top-down organizations are like spiders, but now starfish organizations are changing the face of business and the world.
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search.barnesandnoble.com/The-Starfish-and-the-Spider/O...
search.barnesandnoble.com/The-Starfish-and-the-Spider/Ori-Brafman/e/9781591841432
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A reader writes, "I know that starfish have amazing powers of regeneration, but I have seen pictures of regenerated starfish and in some the regenerated arms are much smaller than the original arms.
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www.susanscott.net/OceanWatch2001/may25-01.html
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In my stack of starfish letters, I also found a good question. For a research project, a student, Laura, chose starfish regeneration. Laura wrote that she knows a starfish can grow into a new individual from one torn-off or castoff arm, but she read that the new arms never grow as big as the original.
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www.susanscott.net/Oceanwatch2002/dec07-02.html
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Echinoderms — starfish and their relatives — have calcium-based skeletons, ... They took brittlestars (Amphiura filiformis), removed an arm or two, and then, to test how acidity affected regeneration of the lost arms, ... Thus, even if it doesn't affect their calcification, low pH still costs echinoderms an arm and a leg.
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www.livescience.com/animals/080929-starfish-warming.htm...
www.livescience.com/animals/080929-starfish-warming.html
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