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These record-breaking tube worms can survive for centuries

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Owlscrying
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Unread post Fri Aug 11, 2017 10:48 am

Some deep-sea tube worms get long in the tooth ... er, tube. Living several decades longer than its shallow-water relatives, Escarpia laminata has the longest known life span for a tube worm, aging beyond 300 years, researchers report in the August Science of Nature.

E. laminata lives 1,000 to 3,300 meters deep in the Gulf of Mexico, near seafloor vents that seep energy-rich compounds that feed bacteria that feed the tube worms. In 2006, biologists marked 356 E. laminata in their natural habitat and measured how much the creatures had grown a year later. To estimate the ages of tube worms of different sizes, the researchers plugged E. laminata’s average yearly growth rate — along with estimates of birthrates and death rates, based on observations of another 1,046 tube worms — into a simulation. The species’s typical life span is 100 to 200 years, the researchers calculate, but some larger tube worms may be more than 300 years old.

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Owlscrying
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Unread post Fri Aug 11, 2017 10:49 am



While exploring hydrothermal vents near the Galapagos, Dr. Robert Ballard and the E/V Nautilus team discover huge swaths of giant and colorful chemosynthetic tube worms.

 
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