Why Crocodiles haven't "evolved"

[rdean]

The estuarine crocodile (Crocodylus porosus) is a semi-aquatic reptile, living mainly in rivers, mangroves and estuaries. Its geographical range extends more than 10,000 km2 of the South-East Pacific, from East India to Fiji and from southern China to North Australia. Although it spends most of its life in saltwater, it cannot be considered a marine reptile in the same way as a turtle is, for example, because it relies on land for food and water.

The results explain why, despite occupying such a large range, species diversification of the estuarine crocodile has not occurred.

One satellite-tagged crocodile – a 3.84 meter-long male – left the Kennedy River and travelled 590 km in 25 days down the west coast of Cape York Peninsula, timing his journey to coincide with a seasonal current system that develops in the Gulf of Carpentaria.

 

[CrusaderFrank]

The estuarine crocodile (Crocodylus porosus) is a semi-aquatic reptile, living mainly in rivers, mangroves and estuaries. Its geographical range extends more than 10,000 km2 of the South-East Pacific, from East India to Fiji and from southern China to North Australia. Although it spends most of its life in saltwater, it cannot be considered a marine reptile in the same way as a turtle is, for example, because it relies on land for food and water.

The results explain why, despite occupying such a large range, species diversification of the estuarine crocodile has not occurred.

One satellite-tagged crocodile – a 3.84 meter-long male – left the Kennedy River and travelled 590 km in 25 days down the west coast of Cape York Peninsula, timing his journey to coincide with a seasonal current system that develops in the Gulf of Carpentaria.

Wide ranged amphibians never evolve. Thanks for the heads up

 

[rdean]

The estuarine crocodile (Crocodylus porosus) is a semi-aquatic reptile, living mainly in rivers, mangroves and estuaries. Its geographical range extends more than 10,000 km2 of the South-East Pacific, from East India to Fiji and from southern China to North Australia. Although it spends most of its life in saltwater, it cannot be considered a marine reptile in the same way as a turtle is, for example, because it relies on land for food and water.

The results explain why, despite occupying such a large range, species diversification of the estuarine crocodile has not occurred.

One satellite-tagged crocodile – a 3.84 meter-long male – left the Kennedy River and travelled 590 km in 25 days down the west coast of Cape York Peninsula, timing his journey to coincide with a seasonal current system that develops in the Gulf of Carpentaria.

Wide ranged amphibians never evolve. Thanks for the heads up

Actually, as long as they are able to share genes, they don't "diversify". They don't evolve into separate species.

 

[CrusaderFrank]

So that whole thing about evolving from the sea and becoming amphibians is total bullshit?

 

[Old Rocks]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

 

[Toro]

Because crocodiles are Republicans?

 

[AllieBaba]

So that whole thing about evolving from the sea and becoming amphibians is total bullshit?

That's what it sounds like to me.

 

[AllieBaba]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

Sure, right after you read the Case for Christ and the Human Genome Project results.

 

[Baruch Menachem]

Because crocodiles are Republicans?

Only 6%

 

[Procrustes Stretched]

Because crocodiles are Republicans?

that was my first thought. then I remembered -- not all conservatives are Republicans.

 

[Procrustes Stretched]

The estuarine crocodile (Crocodylus porosus) is a semi-aquatic reptile, living mainly in rivers, mangroves and estuaries. Its geographical range extends more than 10,000 km2 of the South-East Pacific, from East India to Fiji and from southern China to North Australia. Although it spends most of its life in saltwater, it cannot be considered a marine reptile in the same way as a turtle is, for example, because it relies on land for food and water.

The results explain why, despite occupying such a large range, species diversification of the estuarine crocodile has not occurred.

One satellite-tagged crocodile – a 3.84 meter-long male – left the Kennedy River and travelled 590 km in 25 days down the west coast of Cape York Peninsula, timing his journey to coincide with a seasonal current system that develops in the Gulf of Carpentaria.

Kennedy River? Cape York Peninsula? Gulf of Carpentaria?

590 km in 25 days down the west coast?

could you have given more info for people who live in America?

or did you cut and paste without attribution?

http://www.wildlifeextra.com/go/news/saltwater-crocodiles.html#cr

http://www.google.com/search?q=The+estuarine+crocodile+%28Crocodylus+porosus%29+is+a+semi-aquatic+reptile%2C+living+mainly+in+rivers%2C+mangroves+and+estuaries.+Its+geographical+range+extends+more+than+10%2C000+km2+of+the+South-East+Pacific%2C+from+East+India+to+Fiji+and+from+southern+China+&ie=utf-8&oe=utf-8&aq=t&rls=

 

[Big Black Dog]

Sounds like a croc to me!

 

[CrusaderFrank]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

I'm always amazed at how the gamma ray strikes the embryo at the EXACT moment and causes the EXACT genetic mutation that give the creature the EXACT useful deformity it needs to survive in a new environment.

 

[Baruch Menachem]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

I'm always amazed at how the gamma ray strikes the embryo at the EXACT moment and causes the EXACT genetic mutation that give the creature the EXACT useful deformity it needs to survive in a new environment.

Actually, most of the time, it doesn't. Quite often there are "sports" that are freeky. They get winnowed out by evolutionary pressure. If it isn't a good idea, it is gone before it can afflict the next generation.

One writer explained the way mutation works as comparing it to a poker hand. You start out with the jack, ten and nine and a pair of sevens. A good pat hand. A mutation is where you toss one of the sevens. Most of the time you get things like an ace or a king or some other useless random card, and you go bust. But sometimes you get an eight......

 

[The Infidel]

Sounds like a croc to me!

 

[CrusaderFrank]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

So in over 300 million years there hasn't been one single useful mutation?

No opposable thumbs?

No Wings?

No Squid like tentacles?

No Fur to migrate to the Arctic to feast on Polar bears or seals?

I mean what are the odds?

Seriously. Where are the useful random mutations?

 

[konradv]

Frank, try reading a few of Ernst Mayr's books. Perhaps then you will not seem so damned ignorant of the mechanisms of evolutionary biology. A few of Jay Gould's books would help, also.

So in over 300 million years there hasn't been one single useful mutation?

No opposable thumbs?

No Wings?

No Squid like tentacles?

No Fur to migrate to the Arctic to feast on Polar bears or seals?

I mean what are the odds?

Seriously. Where are the useful random mutations?

They survived the dinosaur extinction, so I assume they have all the mutatuions they need, thank you very much.