Tag: "salamander" at biology news
USGS Responds to Amphibian Declines With Program In Great Smokey Mountains National Park
.... A lucky visitor may even find the rare Junaluska salamander
or hear the chorus of serenading American toads af...lora andfauna in the 800 square-mile Park. Dodd's salamander
survey will be a verysignificant first step in this 10 to 15 year effort. "The entire southern and ...
Secretary Babbitt To Visit Smokies To Learn More Of Scientific Amphibian Project
And Declining Frog And Toad Populations
...eth Dodd to provide information on thediversity of salamander
species within the Park. Secretary Babbitt will visitone of the monitoring areas near Indian Gap. "There now seems to be a clear pattern of decline in populations offrogs and toads that has been recorded throughout the world from pristine ar...
Salamanders May Reveal Best Way To Manage Forests
...n different silviculturaltreatments on terrestrial salamander
species richness and relative abundance.Why study ...ains ofsouthwest Virginia and West Virginia, where salamander
populations may varygreatly from one side of a mountain to the other. Before harvest, speciesrichnes...
USGS Issues Wildlife Health Alert: Associates Virus With Salamander Die-Offs
... 1998 wildlife health alert. The incident followed salamander
die-offs earlier this summer in Maine and North Da...ervice biologists reported finding about 200 tiger salamander
carcasses littering the shoreline and lake bottom. Salamanders that were still alive appeare...
Amphibian Revival: Build It And They Will Come
...nder Pond) had a successful introductionof spotted salamander
and wood frog egg masses. However, since the orig...ng breeding season. In 1974, thefirst year of the salamander
census, 428 were counted, compared with 2,301 in1995. Only two counts have been made for wood frogs;...
Salamanders may one day monitor degradation in small streams
...unity health. "Four species of lungless salamander
appear to be sufficiently abundantand widespread i...sampling techniques," saysRocco. "The northern red salamander
prefers slow areas of streams and we sampledfaster moving water; the longtail salamander
Male courtship pheromone identified
...nal Science, was done with aspecies of terrestrial salamander
called Plethodon jordani. But, as scientistslearn ... In an unusual reproductive process, the female salamander
then storesthe sperm deposited by this male and uses it at some point weeks or months afterinseminat...
Researchers pinpoint chemical signal that speeds mating process
... "The protein we isolated from the male salamander
mental gland is theactive component," says Stephan...art of acomplex mixture of chemicals that the male salamander
uses to stimulate thefemale and encourage her to mate. The male pheromones are produced by thementa...
UC Irvine researchers discover new technique for analyzing crucial cell activity in limb regeneration
... Feb. 15 issue of Developmental Biology. Although salamander
studies have yielded much information on how limbs...vertebrates do not have the natural ability of the salamander
to grow back lost limbs. The challenge with the UCI salamander
research, Bryant said, was finding a...
Amphibian declines complicated, disturbing
...field study found that more than 90 percent of the salamander
embryos not shielded from UV-B radiation either died or hatched with deformities, whereas practically all of those protected by special filters survived and were perfectly normal. In 1998, Blaustein published a study which correlated an increase in ...
ASU scientists probe salamander mysteries
...rizona State University, does research on a lethal salamander
virus. She is one of a large group of scientists ...e its identification in the San Rafeal Valley, the salamander
virus has now been found to be responsible for major dieoffs of several subspecies of tiger salamand...
USGS diagnoses causes of many US amphibian die-offs
...spread to two other wetlands so far; the status of salamander
populations on the many wetlands off the study sit...doviruses have been associated with numerous tiger salamander
die-offs in the western United States and Canada. USGS virologist Douglas Docherty has isolated irid...
Major fossil find reveals Asian origins of salamanders
... soft tissues provide compelling evidence that the salamander
originated in Asia according to a report in the Ma..., 2001 issue of Nature. "All the major primitive salamander
families are now known to be present in Asia," said Neil Shubin, professor and chairman of organisma...
DNA analysis of salamanders turns up new species under almost every log, UC Berkeley zoologists find
Berkeley -- A new species of salamander
discovered in an isolated range of hills in southe... spots and even under our noses. The soil dwelling salamander
looks identical to a salamander
living in mountain foothills several hundred miles away, but DNA ana...
Outside-in conservation: What's around an area
...ts is higher in shadethan in sun coffee farms, and salamander
abundance is higher indisturbed streams that are c...f predatory brook trout, and the proximityof other salamander
populations. In the northeastern U.S., the diversity of stream amphibians is highestin headwater dra...
Lizards and salamanders may use lungs to hear, study says
...s for hearing - one species of salamander
that lacked lungs did not show the chest vibrations that the others did. And when the lungs of the other species were filled with oxygenated saline instead of air, the animals' chests no lon...
Salamanders change spots: Was it environmental stress?
...ealth or stress could be seen in the degree of the salamander
populations' spot symmetry. Comparing today's sal...60 years ago, they found that over the decades the salamander
spots have changed from a regular pattern to a more-asymmetrical one. Zamudio and Wright collected s...
Deformed frogs form when parasites and pesticides combine
...elopment, and survival of frogs. "Frog, toad, and salamander
populations have been declining on a worldwide basis for the past several decades," says Sam Scheiner, program director in NSF's division of environmental biology. "These declines may be a warning of an overall decline in the health of the environme...
Fragmentation may be linked to local amphibian extinctions
...nile amphibians (spotted salamander, small-mouthed salamander
and American toad) in the 127-ha C.W. Green Conservation Area in Boone County, Missouri. In the midwestern U.S., much of the land around amphibian breeding sites has been converted from forest to cropland or pasture. The researchers collected amphibi...
Pesticides linked to amphibian declines
...species: sites that have lost the California tiger salamander
and the Western spadefoot toad had 3 and 6 times more local urbanization, respectively, than sites where these species still live. The spadefoot toad depends on vernal pools, many of which have been destroyed by urbanization or conversion to agricult...