Sentences with phrase «of amphibians at»

Pounds» earliest research had correctly warned that the disappearance of amphibians at Monteverde was not just a natural cycle of boom and busts.

Not exact matches

Conservationist Norman Myers, author of The Sinking Ark: A New Look at the Problem of Disappearing Species (Pergamon, 1979), estimates that with the advent of technology between 1600 and 1900, an average of one species of bird or mammal (little is known about reptiles, amphibians, fishes, invertebrates and plants) disappeared every four years, compared to one every 1,000 years during the «great dying» of the dinosaurs.

Come face - to - face with reptiles and amphibians at the North Carolina Museum of Natural Sciences March 17.

At Moose Hill, we are focused on assessing the populations of Amphibians.

Other wildlife found here include a variety of amphibians, reptiles, and mammals such as painted turtles, Fowler's toads, red fox, river otters, and at least 24 species of dragonflies and damselflies.

With this package you can see 32,000 aquatic animals — 1,500 species of fishes, reptiles, amphibians, invertebrates, birds and mammals from waters around the world — during your stay at the Hilton Chicago.

Common garter snakes, along with four other snake species, have evolved the ability to eat extremely toxic species such as the rough - skinned newt — amphibians that would kill a human predator — thanks to at least 100 million years of evolution, according to Joel McGlothlin, an assistant professor of biological sciences in the College of Science and a Fralin Life Science Institute affiliate.

The second group of 2017 Golden Goose awardees — Joyce Longcore at the University of Maine and Allan Pessier, Don Nichols and Elaine Lamirande, formerly of the Smithsonian National Zoological Park — were recognized for unlocking a mystery to better understand and react to a global epidemic among amphibians.

Nichols, who contributed to the amphibian research and served as veterinary medical officer at the National Zoo, said, «Without federal funding, we never would have been able to do any of this.»

New research suggests that over millions of years of planetary history, birds and mammals have outperformed amphibians and reptiles at adapting to changing temperatures and shifting their habitats to more suitable locations.

Amphibians are the most threatened vertebrates in the world, with over 40 % at risk of extinction.

«Firstly, it means that an island that is home to a particularly high number of amphibian species is now at risk.

Researchers at the Universities of Lisbon (Portugal) and Uppsala (Sweden) studied the behaviour of three kinds of amphibians that inhabit the Iberian Peninsula: the European tree frog (Hyla arborea), the Mediterranean tree frog (Hyla meridionalis) and the Iberian painted frog (Discoglosus galganoi) to find out what effect heat waves can have on their diets.

Today is the 70th birthday of Elizabeth Hay, an embryologist at Harvard Medical School who, through pioneering studies on regeneration of amphibian limbs, has shed light on the cellular mechanisms that transform normal cells into tumors.

Unusually for an infectious disease even at very low rates of infection, and in the absence of the dramatic die - offs witnessed in other amphibian populations impacted by this disease, infected populations of Darwin's frogs are destined for extinction.»

«There isn't any conclusive information that climate change is causing amphibian declines at the sites we've examined,» says Cynthia Carey of the University of Colorado, Boulder.

Now, developmental endocrinologist Tyrone Hayes and colleagues at the University of California, Berkeley, have raised tadpoles of the African clawed frog, Xenopus laevis — the lab rat of the amphibian world — in water with levels of atrazine varying from 0.01 to 200 parts per billion (ppb).

But many of those won't be around much longer; one out of every eight known bird species, one in four mammal species, and one in three amphibian species are at risk for extinction, according to the World Conservation Union (IUCN), which maintains the Red List, a catalog of the world's species classified according to their risk of extinction.

Right now, at least 2,000 frogs, salamanders and other amphibians are in danger of going extinct, according to a survey by biologists David Wake and Vance Vredenburg, writing in the Proceedings of the National Academy of Sciences USA.

According to James Hanken, a biologist at Harvard University who heads a task force on declining amphibian populations, «at least one - third to one - half of all living species of amphibian that have been examined in this regard are on their way down, and out.»

The fungus, which is lethal to at least a dozen European and North American salamander and newt species, has not yet reached the Americas, says Lips, a UMD associate professor of biology and one of the world's top experts in amphibian diseases.

But these tiny amphibians cope quite well and represent an extreme in freeze - tolerant organisms, researchers reported here Monday at the annual meeting of the Society for Integrative and Comparative Biology.

Said co-author Dr. Denise McAloose, Chief pathologist at WCS «While chytrid is wiping out amphibians worldwide, there may be some resistance of amphibians in the Albertine Rift to this organism.

The researchers also looked at amphibian evolutionary history, which considers all the frogs, salamanders and caecilians that have existed over millions of years.

Worldwide, most amphibian communities are not recovering, though earlier this year Ursina Tobler at the University of Zurich, Switzerland, showed for the first time that even in devastated populations, some tadpoles can survive infection (PLoS One, DOI: 10.1371 / journal.pone.0010927).

«But this was not always the case,» explains Professor Dr. Madelaine Böhme, director of the Senckenberg Centre for Human Evolution and Palaeoenvironment (HEP) at the University of Tübingen, who continues, «Our most recent study shows that the number of amphibian and reptile species used to be much higher in the course of geological history.»

Andrew Gray at the University of Manchester, UK, says captive breeding is critical for preventing vulnerable amphibians being wiped out by the next wave of disease or the tiniest change in their natural environment.

«We know that other animals use polarisation patterns in the sky, and we have at least some idea how they do it: bees have specially - adapted photoreceptors in their eyes, and birds, fish, amphibians and reptiles all have cone cell structures in their eyes which may help them to detect polarisation,» says Dr Richard Holland of Queen's University Belfast, co-author of the study.

At the stage Haeckel depicted, the fish embryo is about 1 millimeter long, while amphibian embryos at the same stage of development can be as much as 9 millimeters lonAt the stage Haeckel depicted, the fish embryo is about 1 millimeter long, while amphibian embryos at the same stage of development can be as much as 9 millimeters lonat the same stage of development can be as much as 9 millimeters long.

A team of paleontologists of the Museum für Naturkunde Berlin, the State University of New York at Oswego and Brown University shows in a new study of fossil amphibians that the extraordinary regenerative capacities of modern salamanders are likely an ancient feature of four - legged vertebrates that was subsequently lost in the course of evolution.

Lucas, for his part, is surveying amphibian, crocodilian and dinosaur fossils found at over 800 sites across the western U.S. to refine his own timeline of when species appeared and vanished during the late Triassic.

All About Trout: Across the street from the lab, watch one of the daily feeding demos at the Cold Spring Harbor Fish Hatchery and Aquarium, which has the largest living collection of freshwater fish, reptiles and amphibians native to New York.

AT RISK A poison dart frog (Dendrobates auratus) in Panama is just one of hundreds of amphibian species that succumbs to the chytrid skin fungus, which scientists now know has a special trick for disabling frog immune systems.

Co-author Dr Augusto Coppi, lecturer in Veterinary Anatomy and Stereologist at the University of Surrey, said: «The liver function of this amphibian, Siphonops annulatus, may provide us with a unique opportunity to solve one of the most devastating illnesses of the liver.

But insects and amphibians have water - sensing nerve cells, and there is growing evidence of similar cells in mammals, says Patricia Di Lorenzo, a behavioral neuroscientist at the State University of New York in Binghamton.

The scientists found the amphibians in leaf litter at an altitude of 600 metres on Monte Iberia in eastern Cuba.

De Queiroz is a curator of amphibians and reptiles at the Smithsonian's National Museum of Natural History.

Bsal causes chytridiomycosis, a disease that eats away at the skin of amphibians.

They then trapped 115 flies at random in the two forests and found that 40 % contained identifiable DNA fragments from a total of 20 mammal taxa, two bird species, and an amphibian.

At 17, he joined a group of herpetologists and enthusiasts, which focused on amphibian and reptile diseases.

When Frank Pasmans and An Martel, veterinarians here at Ghent University, heard about the enigmatic deaths, they recalled extinctions caused by Batrachochytrium dendrobatidis (Bd), a highly lethal fungus that infects more than 700 species of amphibian.

«Non-linear» animal reactions He and his colleagues based their analysis on nearly 500 million temperature records collected at 3,000 weather stations between 1961 and 2009, feeding that information into models that allowed them to estimate how climate shifts affected the metabolism of cold - blooded insects, lizards and amphibians around the world.

At some point between the first amphibians moving onto dry land and the evolution of mammals, the neocortex arose — extra layers of neural tissue on the surface of the brain.

Such a sudden and rapid depletion of salamander species, especially ones with dense populations such as the eastern newt, could have «cascading effects» in affected ecosystems, says Michael Lannoo, a herpetologist at Indiana University and expert on amphibian declines.

«If you saw it hopping around in your back yard, you wouldn't think much of it,» says Robert Carroll, an amphibian palaeontologist at McGill University in Montreal.

Anthony Mescher, a cell biologist at the Indiana University School of Medicine with expertise in amphibian regeneration, thinks Heber - Katz's mice do repair injuries better than ordinary mice.

In research published online in a recent issue of PeerJ, an open access journal, Professor Robert Reisz, Distinguished Professor of Paleontology at UTM, explains that the presence of such an extensive field of teeth provides clues to how the intriguing feeding mechanism seen in modern amphibians was also likely used by their ancient ancestors.

«Maybe people don't care about amphibians, but imagine if this kind of pathogen had gotten into mammals,» says Vance Vredenburg, an ecologist at San Francisco State University.

A paper on the population genomics of amphibian killing chytrid fungus B. dendrobatidis that culminated several years of work and large collection of researchers was published in PNAS at the beginning of the summer.

Although specimens of fishes, marine reptiles, non-avian dinosaurs, birds, and mammals of this age have all been recovered from this now - frozen continent, most fossils, especially those of land - living species, are fragmentary and poorly informative, and a number of major vertebrate groups that likely once lived in Antarctica (e.g., amphibians, crocodilians) have yet to be discovered at all.