Tampilkan postingan dengan label ocean. Tampilkan semua postingan
Tampilkan postingan dengan label ocean. Tampilkan semua postingan

Sabtu, 04 Desember 2010

New Lobsters Found in Australia

New lobsters have been found in Australia. Six species new to Australia were discovered off the western. Two are new finds to the world. The most interesting is Galacantha subspinosa which is bright red in its live state, before being cooked. It will make only a small meal being only a few inched across.

There are hundreds of lobster species worldwide. They live in the shallows and the deep ocean. Those along the coast are related to crabs though they are called lobsters. The squat lobster is of this type having large front claws.

The red G. subspinosa new to Australia would fit well into aquatic themes parks because of its pretty color. This squat lobster is not in sufficient numbers to be an economic fishing species. Furthermore it has a small body which would not provide much "meat".
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Kamis, 02 Desember 2010

Ocean Dead Zones Could Cause Mass Extinction

The number of oceanic dead zones in the world is increasing. In the zones oxygen levels are too low to sustain life. It is widely know that a monster area in the south Atlantic is growing in size, but there are hundreds more smaller dead zones. They are caused by overfishing and the nutrient rich residue in fertilizer runoff.

Climate change also plays a part. As oceans warm up layers form and some become stagnant with low oxygen levels. Long standing currents and wind directions have changed which has reduced layer intermixing.

Since 2000 over 400 dead zones have been identified. In the 1980s there were little more than a hundred. Some are huge, more than 70,00 sq kilometers, while many are less than a square kilometer.

The lack of oxygen not only causes death. Offspring are born deformed. They do not survive, or produce fewer young. Danger of a mass extinction is now very high. Dead zones are forming on continental shelves where most fishing is done. The mere presence of humans is deemed to be a contributing factor to dead zones. Man changes the balance of life.
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