Wednesday, 2 August 2017

Spiders Could Of Come From South Africa To Australia. By Emma

...Spiders could of come From South Africa to Australia…

A certain species of spider was thought to only move a few meters in their entire life!
It turns out that they may have crossed the Indian Ocean to get to Australia, by suggested research.
A spider that is found only on south Australia's kangaroo island which was originally thought to of split from it’s south African relations when the giant land masses separated years ago.

But research by the University of Adelaide now suggests the spider is much more closely related to its South African counterpart and probably crossed the Indian Ocean to get here.
PhD student Sophie Harrison said the genetic link between the two types of spiders is much stronger, meaning the spiders had to have traveled to Australia after it was formed as a continent because of human beings.
"Rafting is the best theory that fits the situation," said Ms Harrison.
"It seems like a really strange concept but in a lot of ways they are much better adapted to dispersing in that way than mammals or other vertebrates; they have a stable burrow and a low metabolic rate - they don't need much food."
Researchers think that the spiders made the 10,000 km trip across the ocean on large chunks of land or floating bits that were washed out to sea.

The spiders, which measure about the size of a 10-cent coin, hatch close to the ocean on Kangaroo Island and set up burrows nearby, where they stay for the rest of their lives, only lunging out of their homes at night to catch prey.

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