Tag: "salamanders" at biology news
HHMI researchers Richard Axel and Linda Buck win 2004 Nobel Prize
...rant receptors of humans, mice, catfish, dogs, and salamanders
have been identified in this way. The team's most surprising finding was that there are so many olfactory receptors. The 100 different genes the researchers identified first were just the tip of the iceberg. It now appears that there are between 500 ...
New program examines stem cells' potential to repair, replace damaged tissue
...are animals that regenerate whole tissues, such as salamanders
that can grow new tails. Why can they and why can't we?" says Dr. Isales. The idea of regeneration in humans has always existed to some extent, he says, but now scientists have the tools to start making it happen. "So there is potential here - when...
Discovery of an American salamander where it shouldn't be: Korea
...s. "I've discovered and named nearly 50 species of salamanders
- more than 10 percent of the total in the world. ...sue of Nature. The find suggests that the lungless salamanders
are more widespread than people thought, and some 60 to 100 million years ago may have had a worldwi...
Elusive salamanders have role in developing new sampling models
OAK RIDGE, Tenn., June 1, 2005 Rare salamanders
at a Georgia military base are the guinea pigs for...cies has vanished. After not finding any flatwoods salamanders
since 2001, Fort Stewart biologists were a bit concerned and were looking for a better survey method...
Retina adapts to seek the unexpected, ignore the commonplace
...es." While manipulating the visual scenes faced by salamanders
and rabbits, Meister and colleagues recorded neura...ironment. Because this adaptation occurred in both salamanders
and rabbits, Meister concluded that it typifies retinal function in both amphibians and mammals, ani...
Coyotes in the suburbs, bears in the backyard
...Mont-Royal, home to four populations of red-backed salamanders
(Plethodon cinereus). Stranded on this green oas...) compared the genetic structure of the Mont-Royal salamanders
to that of red-backed salamanders
living in Mont-Mgantic, a relatively undisturbed mountain about 20...
Experts develop global action plan to save amphibians facing extinction
...an action plan intended to save hundreds of frogs, salamanders
and other amphibians facing extinction from familiar threats such as pollution and habitat destruction, as well as a little-known fungus wiping out their populations. The Amphibian Conservation Summit held Sept. 17-19 concluded with proposals for a s...
Cattle grazing may help rather than hurt endangered species
...ntially, leaving endangered fairy shrimp and tiger salamanders
without enough time to mature before their temporary aquatic environments disappear. "Consequently, land managers can play an important role in climate change impacts, i.e. they can exacerbate or ameliorate, the local impacts of global change." Pyke...
Climate change drives widespread amphibian extinctions
...he world's 6,000 or so species of frogs, toads and salamanders
face extinction--a figure far greater than that for any other group of animals....
Global warming drives epidemic disease wiping out amphibian populations
...e world's 6,000 or so species of frogs, toads, and salamanders
are threatened with extinction--a figure far greater than any other group of animals....
Habitat microstructure drives salamander metamorphosis
transform into their terrestrial, adult form or re...t and Chippindale's results show that paedomorphic salamanders
prevailed in streambeds made of large well-sorted gravel, whereas metamorphic salamanders
Early land animals could walk and run like mammals, new study finds
...Reilly said. In the recent study, the tuataras and salamanders
walked and ran on a trackway with an integrated pl...their energy needed to walk and run. When studying salamanders
and tuataras, the researchers spotted the telltale vault and dip of center of mass movements in diff...
DARPA grant supports research toward realizing tissue regeneration
...rm the same trick of regrowing a severed limb like salamanders
or newts can. That is because in humans the cells ...to the site of injury form scar tissue, whereas in salamanders
the responding cells are genetically programmed to become the cell types of the lost structure, with...
Finding a cellular Neverland: How stem cells stay childlike
...plications for regenerative medicine. Animals like salamanders
readily regenerate severed limbs as adults, but mammals cannot. In fact, mammals have a limited repertoire of tissues they can regenerate, and some essential ones, such as nerves and cardiac muscle, are not on that list. For human tissue regenerati...
Worcester Polytechnic Institute, CellThera collaborate on work aimed at regenerating limbs
...hat can regrow functional limbs as an adult. Adult salamanders
are able to restore lost limbs by first making a blastema, a mass of undifferentiated cells much like stem cells. The same type of "bud" is produced when a human child loses only the tip of a finger, but that capability is lost by adulthood. The r...
Boston University biologists discover amphibian eggs use defenses against water molds
...or by the developing embryos themselves. Spotted salamanders
wrap their eggs in a protective jelly layer that p...lly works well as an anti-mold defense for spotted salamanders
near Boston, in upstate New York the species suffers high mortality from water mold infections. "W...
How fish mend a broken heart
...ration," they said. For instance, certain newts or salamanders
can regenerate limbs, spinal cord, retina, brain, and heart tissue. While progenitor cell populations have been identified within most mammalian organs, including skin, skeletal muscle, brain, and heart, these cells vary widely in frequency and the ...
NYC tadpoles fly to Puerto Rico
...er. "To date, over 200 species of frogs, toads and salamanders
have disappeared with another 1,000 species threatened with extinction." Congressman Jos E. Serrano (D-Bronx) applauded WCS for playing a lead role in the federally supported initiative that is saving Puerto Rico's natural heritage. "We commend the...
Whole body regeneration from a blood vessel
...s no big deal. As many an inquisitive child knows, salamanders
can regenerate lost limbs or tails; and as lab investigators know, zebrafish can regrow lost fins. Of course, humans and other "higher" vertebrates must make do with repairing rather than regenerating damaged tissues. Though whole body generation (WB...
Novel salamander robot crawls its way up the evolutionary ladder
...n. The researchers used a numerical model of the salamanders
spinal cord to explore three fundamental issues related to this vertebrates movement: what were the changes in the spinal cord that made it possible to evolve from aquatic to terrestrial locomotion? How are the limb and axial movements coordinated? A...