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Autohaemorrhaging in Snakes |
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Mika
Member Joined: 03 Apr 2006 Location: United Kingdom Status: Offline Points: 21 |
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Posted: 07 Apr 2006 at 5:22am |
Morning all, |
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Vicar
Senior Member Joined: 02 Sep 2004 Location: United Kingdom Status: Offline Points: 1184 |
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I'm not aware of any snakes which are 'squirters', although I know of at least one Jamaican species which is a 'bleeder'. I believe the mechanism involves increasing blood pressure in certain areas until a thin membrane fractures, I'll try to find a reference and add more detail. |
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Mika
Member Joined: 03 Apr 2006 Location: United Kingdom Status: Offline Points: 21 |
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Thanks Steve, would appreciate that
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Dan Kane
Senior Member Joined: 30 Dec 2005 Location: United Kingdom Status: Offline Points: 198 |
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This link has some pics of Grass Snakes. If you click on it, there is a pic of a grassie bleeding from its mouth (autohaemorrhaging). http://community.webshots.com/photo/462649628/14632262530654 88803TUKCrS
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Dan
www.randacumbria.moonfruit.com |
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Mika
Member Joined: 03 Apr 2006 Location: United Kingdom Status: Offline Points: 21 |
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Thanks Dan, that's a very interesting picture!
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Dan Kane
Senior Member Joined: 30 Dec 2005 Location: United Kingdom Status: Offline Points: 198 |
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Mika and Steve, The species in which autohaemorrhaging has been observed are; The Dwarf Boas, which bleed from their mouth and eyes, after forming a tight ball to protect themselves; Tropidophis greenwayi, T. haetianus, T. maculatus, T. melanurus, T. pardalis, T. semicinctus, from the West Indies, and T. parkeri, and T. paucisquamis from the mainland. Also, Rhinocheilus lecontei bleeds from its cloaca and nostrils, Heterodon platyrhinos, which bleeds from its cloaca, prior to feigning death, and Nerodia erythrogaster, which bleeds from its gums. These species are "thrashers", and the increased blood pressure causes bleeding. Dwarf Boas have more control over their bleeding. All of these species are from North America. |
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