Tag: "extinct" at biology news

It only takes one fish to wipe out a population

...ld population of 60 000 fish. The populationbecame extinct within just 40 generations. Even a single transgenic animal could have the same effect,they found, although extinction would take longer. "You have the very strange situation where the least fit individual in the population is gettingall the matings...

Past climate change effects on mammals may mirror global warming impact

...as yellow-bellied marmots and pygmy rabbits became extinct at Homestead Cave and today only can be found in c...ides a way of predicting which species will become extinct and which will gain with a temperature increase of at least 2 degrees C. Every animal that declines...

Chinese 'dragon' nears extinction, biologists warn

... become the first species of crocodilian to become extinct in the wild within historical times," said Dr. John Thorbjarnarson, a WCS conservation biologist and an authority on the world's 23 crocodilian species. "Losing the Chinese alligator would be an ironic fate for an animal with such a rich, cultural s...

Complex mystery of amphibian decline calls for a new kind of science

...lia. In these areas, dozens of species have become extinct and numerous others are being threatened -- each with its own unique set of environmental conditions that may be involved. "This project involves 24 investigators across three continents," Collins said. "It's so large because the problem is big and...

Extinction-prone sunfish and suckers identified

...is study, the Penn State researcher noted that one extinct sucker did not appear on the graph in the same location with the other extinction prone species. The existence of the "outlier" indicates to him that there could be an additional group of sunfish and suckers that are also extinction prone. Pyron's...

Integrative approach to studying penguins, cockroaches and little hairy noses makes comparative biomechanics group at UC Berkeley the nation's best

... to learn principles that will tell him how large, extinct animals moved, including mammoths, mastodons and dinosaurs. Many of the principles discovered are now being co-opted by engineers to design robots. Dickinson is working with UC Berkeley engineer Ron Fearing to design a robotic fly, while Full is coll...

June 'Geology' and 'GSA Today' highlights

... contentious. One camp argues that dinosaurs went extinct suddenly (as would have occurred if an asteroid ki...m), while the other argues that the dinosaurs went extinct gradually (as would have occurred if a non-catastrophic event were responsible for their demise). A ...

New research centre to continue 200-year-old traditions

...et aside as a refuge for species that might become extinct on the mainland. They secured Flinders Chase as a reserve, and introduced a wide range of fauna, including Koalas, Platypus and Cape Barren Geese. The animals thrived, and the Chase is now the largest intact piece of coastal woodland, mallee and he...

Endangered butterfly needs proper habitat, special nectar

...gon, was discovered in the 1920s and then presumed extinct by the 1930s. Then, in 1989, a few tiny populations of the butterfly were rediscovered. Eventually, eleven years later, the species was listed as endangered for the first time in January of this year. Schultz has specialized in study of Fender's bl...

Cadmium makes brittle bones in Rocky Mt. birds

...t these cadmium-contaminated populations do not go extinct is that new recruits arrive each year from places with normal cadmium levels to replace those that die off," Larison explained....

Running out of reptiles

.... One example is the Galapagos tortoise, now near extinct due largely to introduced rats which destroy the tortoise eggs. Other problems include environmental pollution, disease and even the simple presence of humans among a fragile population. Cars kill animals; predators are attracted by human food waste...

Scientists fear loss of colobus monkey heralds beginning of 'extinction spasm' of many West African species

...and that such complacency may allow taxa to become extinct that could have been saved by more rigorous and timely action," the scientists wrote in a report to be published in the October 2000 Conservation Biology. However, they emphasized that urgent measures could save what remains of the indigenous flora a...

Ocean sponge source of new drug discovery

...that could hold the keys to new drugs are becoming extinct every day. We have the same potential in the oceans, the least-explored and understood environments in the world," McCarthy said. He adds that the oceans "are potentially the richest source of new drugs to treat human disease." It may not be obv...

Fossil teeth of extinct North American rhinos reveal an aquatic lifestyle similar to modern hippos

...in the water, much like a modern hippopotamus. The extinct rhinoceros, known as Teleoceras, ranged from Florida to the West Coast from about 17 million years ago until about 4.5 million years ago. Its semi-aquatic lifestyle, first suggested by its body shape, has been disputed by some researchers. But eviden...

New fossil found in Mongolia provides insight into the origin of living birds and the evolution of flight

...eposits in the fossil record of Mesozoic, but went extinct at the end of the Cretaceous period, 65 million years ago. "The new find suggests there was no reason to believe that there was a restriction of the nearest relative of living birds to coastlines by this lineage of opposite birds," Clarke said. "Here...

New fossil study rejects 'Eve theory'

...s wide regions of the world, and were not rendered extinct by one 'lucky group' that later evolved into us," says Wolpoff, a professor of anthropology at the U-M and first author of the study. "The fossils clearly show that more than one ancient group survived and thrived." For the study, Wolpoff an...

New information for managing invasive species and marine reserves at the start of the 'International Biodiversity Observation Year'

... the web, which will save the images and sounds of extinct and endangered species for future generations and an IMAX film explaining the links between people and nature A special education webpage for children was launched in January and, later in the year, an internet chat session with IBOY's biodiversity e...

Scholar finds parallels between U.S./Japanese attitudes toward wolves

...logical factors caused the Hokkaido wolf to become extinct around 1890. The last Japanese wolf was killed in ...here is a serious degree of regret that wolves are extinct in Japan. "I think that there's a feeling that an important part of Japan's natural heritage and cu...

Organgutan numbers plummeting worldwide; species may vanish in ten years, study says

...rld's largest natural orangutan population will be extinct in a decade or so, unless the current trend is stopped," said the study's lead author, Dr. Carel van Schaik, a WCS research associate from Duke University who has studied wild orangutans for more than 20 years. Ironically, the Leuser Ecosystem includ...

Geologists explore beach nourishment controversies, groundwater quality, and Blue Ridge mountain issues

... in 1998. Tentatively classified as a member of an extinct group of reptiles called prolacertiforms, it was p...cular finds mentioned above was the skeleton of an extinct terrestrial cousin of the crocodile. This top predator of its day was discovered near Raleigh by a t...

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