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本帖最后由 evelyn 于 2009-9-30 03:51 PM 编辑
有人在网络上讨论过这种粘膜虫了。。。
Raleigh 'Sewer Monster' a Colony of Worms
Thursday July 2, 2009
Billed as an "Unknown Life Form in North Carolina Sewer," this creepy YouTube videoof what looks like nothing so much as a pulsating blob of meat lodgedin a Raleigh, NC sewer pipe is quite real, though in truth it isneither "unknown" nor an "alien" life form, as many who've seen thevideo have speculated.
According to various experts it's a either a colony of tubifex worms (aka "sludge worms") or a colony of Bryozoans(tentacled organisms commonly referred to as "moss animalcules"), bothof which are relatively common but rarely seen by the average personbecause their native habitats are underwater. It's not unusual to findeither species thriving in sewers.
什么是 Tubifex 虫:
Tubifex tubifex, also called the sludge worm, sewage worm, or lime snake, is a species of tubificid segmented worm that inhabits these diments of lakes and rivers on several continents. T. tubifex probably includes several species, but distinguishing between them is difficult because the reproductive organs, commonly used in species identification, are resorbed after mating, and because the external characteristics of the worm vary with changes in salinity. These worms ingest sediments, selectively digest bacteria, and absorb molecules through the body wall.
The worms can survive with little oxygen by waving hemoglobin rich tail-ends to exploit all available oxygen.They can also survive in areas so heavily polluted with organic matter that almost no other species can endure. By forming a protective cyst and lowering its metabolic rate, T. tubifex can survive drought and food shortage. Encystment may also function in the dispersal of the worm. |
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