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Tag: "extinct" at biology news

Researchers find 24 species believed new to science in Suriname rainforest

...re armored catfish, Harttiella crassicauda, feared extinct because gold mining activities had contaminated a creek where it was last seen more than 50 years ago. Overall, the survey recorded 467 species at the two sites, including large cats such as panther and puma, various monkeys, and a range of reptil...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...ecies included in the study now are believed to be extinct because of habitat degradation and possibly other causes such as climate change. A recent global assessment of amphibians found that the Caribbean Islands have the highest proportion of amphibian species threatened with extinction. Hedges and coaut...

Ancient DNA traces the woolly mammoth's disappearance

...DNA lifted from the bones, teeth, and tusks of the extinct mammoths revealed a “genetic signature” of a range... new study, Barnes and Lister’s team looked to the extinct woolly mammoth. What they found, however, was an “interesting pattern, not like those of the other s...

Massive herds of animals found to still exist in Southern Sudan

...iscovered populations of beisa oryx, thought to be extinct in the region, and the Nile lechwe, which is antel... in Southern National Park. “This species has gone extinct over much of its former range, so it is very good news that what we believe is a viable population h...

MU researchers to study the status of black bears in Missouri

...nd 19th centuries, but have been considered almost extinct in Missouri since the late 19th century. The results of the MU study will be used by the Missouri Department of Conservation to help manage Missouri’s black bear population. The researchers – Kaitlyn Faries, a senior biology and chemistry major, and...

The kapok connection -- Study explains rainforest similarities

...lant communities. "This tree has become locally extinct in parts of the Peruvian Amazon as a result of overexploitation for plywood," Dick said. "It might be saved from widespread extinction by continuing to invade new land areas through oceanic dispersal."...

UI anthropologist, colleagues discover remains of earliest giant panda

...boo forests. It is often found associated with the extinct elephant-like creature, Stegodon, and the giant extinct ape, Gigantopithecus. Today's giant panda is isolated in mountainous upland bamboo forests, partly d...

Reconstructing the biology of extinct species: A new approach

...locomotion. "Now we have a way to reconstruct how extinct species moved that is completely independent of analysis of the limb structure. For the first time, we can test our previous conclusions using a new source of information." ...

Ancient retrovirus sheds light on modern pandemic

...iviral protein TRIM5a effectively neutralizes this extinct retrovirus, which never successfully fixed into the human genome. "However, while TRIM5a may have served humans well millions of years ago, the antiviral protein does not seem to be good at defending against any of the retroviruses that currently i...

Lessons from the orangutans: Upright walking may have begun in the trees

...e Sumatran orangutan population is predicted to be extinct in the next decade if habitat degradation continues. Our research further highlights the need for protecting these animals," she said....

Amphibians in losing race with environmental change

...onmental insults, Blaustein said, if they don't go extinct first. But evolution is an erratic, often slow and imperfect system, and the complexities of amphibian life cycles makes them more immediately vulnerable than many other species, the researchers said. ...

Legal ruling may put endangered species in danger

...wed our national symbol, the bald eagle, to become extinct in the lower 48 states, surviving only in Alaska, ...and it would have allowed the gray whale to become extinct in U.S. waters," Vucetich went on to say. Vucetich and Michael P. Nelson, associate professor of ...

An ancient bathtub ring of mammoth fossils

...teeth tusks, femurs and any and all other parts of extinct mammoths left by massive Ice Age floods in southeastern Washington. The fossils, in some cases whole skeletons of Mammathus columbi, the Columbian mammoth, were deposited in the hillsides of what are now the Yakima, Columbia and Walla Walla valleys ...

Dinosaur hearing, listening to muscle noise, quieter cubicles

..., and even to reconstruct the hearing abilities of extinct animals such as dinosaurs and early mammals. Acco...inner ears of archosaurs (birds, crocodilians, and extinct dinosaurs) have highly similar structures. The researchers found a relationship between the body ma...

Improved predictions of warming-induced extinctions sought

...om global warming, surprisingly few species became extinct during the past 2.5 million years, a period encompassing several ice ages. They suggest that this "Quaternary conundrum" arises because the models fail to take adequate account of the mechanisms by which species persist in adverse conditions. Consequ...

Fish extinctions alter critical nutrients in water, study shows

...cked up the slack in nutrient recycling left by an extinct species, nitrogen and phosphorus were maintained at 80 percent of their starting values until over half the total number of species were lost. Studies of complex ecosystems, especially those involving large, highly mobile fish, are almost impossibl...

Despite their heft, many dinosaurs had surprisingly tiny genomes

...tanding to gauge the genome sizes of 31 species of extinct dinosaurs and birds, whose bone cells can be measu... scientists to look back in time at the size of 31 extinct species' genomes: By measuring lacunae in dinosaur and extinct bird specimens housed at Harvard's Mu...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...lpha I, while others matched newt and frog. For extinct species, the real goal is to find sequences unique to that organism. Asara generated a set of theoretical collagen protein sequences representing the kinds that might have been present around the time of T. rex. None of his dinosaur peptides matched ...

Why aren't humans furry? Stone-Age moms could be the answer

...Harris?hypothesis continues that Neanderthals went extinct because human ancestors ate them. This year's prize judge was Professor Jonathan Rees FMedSci of Edinburgh University, Scotland ?co-discoverer of the 'red hair gene'. Professor Rees said: "This paper is an excellent example of the kind of bold thi...

Saving endangered whales at no cost

...xtinction remains a threat. The whale is virtually extinct in Europe, but a small population of about 350 individuals remains on the east coast of North America. A leading threat to the species is lethal entanglement by fishing gear: Photographic evidence indicates that 75% of individuals show signs of entan...

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