It may seem that Iguanas in the remote Fiji islands live in the cold, but according to the new research, they had to work for it: through kindness through thousands of miles from the oceans on the vegetation in the last 30 million years or so.
This is correct. A new investigation of the Eaguanidai family tree – a tree that includes about 2,100 reptiles, from the marine Eaguanna in Galapagos to the chameleon from the tropics and chocolate in the desert – provokes that Fiji Iguanas is closely related to guards in the American south.
Looking at the vast geographical distance between the two, but their relative genetic proximity, a team of researchers concludes that in the old past, a group of desert reptiles risen on the floating debris and never looked back – making it in Fiji and surviving for 34 million years. The team’s search was Published Today in the facts of the National Academy of Sciences.
“The lineage of Fiji Iguanas has separated from their sister’s proportions recently, 30 million years ago, either after dating or almost at the same time, as there was a volcanic activity that could result from land,” said Simon Scarbita, a specialist at San Francisco University and paper author at the University of California. Release.
“The potential mechanism of dispersion was wandering on a vegetable mat, so it was possible that EGwanas from North America to Fiji had food from the same flood on their journey across the Pacific.” “It is also likely to be flexible for the conditions they faced on the road, such as a lack of permanent water and high temperatures.” As for the schedule, Scarpetta said that previous estimates of a Pacific trip ranged between 4 to 12 months, although the most modern simulations have proposed a schedule from 2.5 to 4 months.
If the team’s conclusions are correct, Fiji Iguanas ancestors rid 5,000 miles (8047 km) from Western North America to Fiji, their ride on vegetable Flotsam, fortunate ocean currents, and a dream. This mobility will be the longest dispersion of two oninars of the ground vertebrates-a strange record, but it talks about the superior nature of discovery.
“Iguanas and the desert Aguanas, in particular, are resistant to hunger and dehydration, so my thinking is, if there is any group of vertebrates or any group of lizards that can really make a trip of 8,000 km across the Pacific on a mass of plants, Scarpetta will be blocked.”
A genetic analysis of more than 4000 Jin Eguana, taken from more than 200 samples of lizards, revealed the closest relatives of Fiji Agwana: the desert in North America (Agwana in North America)Dipsosaurus dorsal).
Since the Fiji Islands were formed about 34 million years ago, based on the timing of the genetic difference of Fiji Iguanas from the desert of North America, researchers believe that the lizards arrived in the island in the last 30 million years.
“The alternative models involved colonialism from the neighboring areas are not really working in the timeline:” they seem to have arrived in Figi directly from North America crazy, “said co -author Jimmy McGueri, the world of Al -Harwiya at the University of California, Berkeley, in the same version.
The idea that Eguanas was floating from another place to the former South Pacific Islands, Erm, Float. But the new research effectively excludes the origin of South America to the Pacific Ocean, as well as the idea that reptiles have evolved from ancient proportions that were wide in the Pacific Ocean before extinction.
“One of the questions that deserves to be referred to is our study, although it will be difficult to test, whether the Eguana jumps across the islands in the Pacific Ocean from North America to Fiji, instead of rowing in one event,” Scarbita added. “This is an interesting possibility, although there are no fossils of Agwana Vigian known from anywhere in the Pacific Ocean alongside Fiji and Tonga, and volcanic islands, many of which are in the Pacific Ocean, can be fast.”
Although it is isolated in the remote islands, the four types of Eguana on Fiji and Tonga were at risk due to a mixture of habitat, predation, and foreign pet trade. The new research is a reminder of the pain that endured living organisms to survive, and gives us another reason to preserve the animals that have reached today.
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