Another fantastic frog fact for you!
grafici tendenze opzioni binarie The Wood Frog (Rana Sylvatica) can survive being completely FROZEN for weeks at a time!
http://tinyiron.net/?serpantin=opcje-binarne-jaka-platforma&05b=96 The Wood Frog lives in the cold Arctic environment of Alaska so this is a very clever adaptation to have.
cosa significa fare trading online During the freezing winter, the tiny amphibians can survive for weeks with an incredible two-thirds of their body water completely frozen. Frozen frog popsicles!
billig Sildenafil Citrate von pfizer When their body temperature drops, they stop breathing and their hearts do not beat. In order to keep ice from freezing in their cells, they pull water away from their extremities and produce a type of antifreeze solution (known as cryoprotectants) that keeps them safe.
my link In most animals, prolonged exposure to freezing temperatures causes cellular shrinkage — a process in which the formation of ice in the tissues pulls water from the body’s cells, essentially sucking them dry and eventually killing the cell. But in Wood Frogs, the cryoprotectants in their bodies, which includes glucose (blood sugar) and urea, lowers the freezing temperature of the animal’s tissues and reduces the amount of stress on the cells and tissues, allowing them to survive a deep freeze.
http://buiu.net/?selred=south-carolina-divorce-laws-dating Watch this video for fan-froggy-tastic footage of the Wood Frog defrosting. Amazing!
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source url http://www.tangotec.com/?sitere=giorni-migliori-per-opzioni-binarie&716=44 DARWIN’S FROG
http://www.boligsalg-spanien.dk/?nlnl=binaire-opties-nederland-forum&698=a7 Darwin’s frog was named after Charles Darwin, who discovered this unique creature living in Argentina and Chile, while on his famous world voyage.
Acceleration of stock option vesting Darwin’s Frog is a very cleverly adapted frog. It camouflages itself from predators by lying on the ground looking like a dead leaf (it has a pointy nose giving it a leaf shape). It can also turn on its back exposing the boldly patterned surface of its belly. The most amazing feature of this frog however, is that the tadpoles develop into frogs inside the male frog’s throat!
http://saturnsails.co.uk/basket/?wc-ajax=get_refreshed_fragments First, the female lays her eggs in the water. The male guards the eggs for 2-3 weeks but still, about half are eaten by insects and other predators. Any eggs that actually make it to the tadpole stage (usually about half) are swallowed by the male, who carries them around in his vocal pouch and protects them as they grow.
binär optionen für anfänger Once the tadpoles are tiny froglets, and large enough to protect themselves, they hop out of dad’s mouth and swim away. What a clever and unique way to protect your babies!
http://boersenalltag.de/blog/blog-from/2010-10-01/blog-to/2010-10-31/ But sometimes clever adaptations like this are not enough.
There are two species of tadpole-swallowing frogs. Rhinoderma darwinii is considered vulnerable and Rhinoderma rufum is considered critically endangered.
The vulnerable status of these frogs seems to be due to several reasons including deforestation, habitat loss, climate change and disease.
In 1953, the Western Swamp Tortoise had been extinct for over 100 years.
So you can imagine the surprise and excitement when a 15 year old school boy named Robert Boyd took his pet tortoise to a wildlife show – and it turned out to be a Western Swamp Tortoise!
They weren’t extinct after all.
But they were extremely endangered.
And, despite efforts to protect the remaining tortoises – such as the establishment of protected nature reserves – the tortoise numbers had dropped to as few as 30 by the 1980s.
In 1988, in an effort to help boost the number of tortoises, a breeding program was established at the Perth Zoo.
Since then, the program has bred over 800 Western Swamp Tortoises of which more than 600 have been released into the wild.
Check out this amazing video of baby tortoises hatching at Perth Zoo.
Today, it is estimated that 50 tortoises of breeding age live in the wild. The Perth Zoo’s breeding program has played a vital role in the survival of the Western Swamp Tortoise. Without it, they would most likely have become extinct – AGAIN!
For more information about the Perth Zoo Breeding Program click HERE.