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Tag: "wolf" at biology news

Ice Age extinction claimed highly carnivorous Alaskan wolves

...s has added one more: a highly carnivorous form of wolf that lived in Alaska, north of the ice sheets. W...nscathed. But this previously unrecognized type of wolf appears to have vanished without a trace some 12,000 years ago. The study, which will be publishe...

Researchers identify gene involved in dog size

...ludes domestic dogs diverged from that of the gray wolf more than 15,000 years ago. Due to selective breeding by humans throughout history, dogs today exhibit an extremely wide range of body types and behaviors. In fact, dogs exhibit the greatest diversity in body size of any mammalian species. In thei...

Over a century after disappearing, wild elk return to Ontario

... long after being transferred, particularly due to wolf predation, illegal hunting and stress from the transfer process. However, the death rate is decreasing each year, suggesting that the animals are adapting to their new home. Although pleased with the program’s success to date, Rosatte asserts that...

Wolves are suffering less from inbreeding than expected

... threat against the viabi lity of the Scandinavian wolf population. A study just coming out in the new jou...ults show that it is the most genetically variable wolf individuals that are recruited into the breeding population. An important consequence of this action...

Ground spider diversity studied in research project

...two years. The most common were several species of wolf spiders, she said. A total of 989 species of spiders have been identified in Texas; 280 of these are found in Brazos County. Henderson set out pitfall traps ?made of plastic cups, funnels and animal-safe antifreeze ?to collect the spiders. A vari...

Bacterial protein mimics host to cripple defenses

Like a wolf in sheep's clothing, a protein from a disease-causing bacterium slips into plant cells and imitates a key host protein in order to cripple the plant's defenses. This discovery, reported in this week's Science Express by researchers at the Boyce Thomp...

Removing egg from nest may help save endangered whooping crane

... siblicide or is killed by a predator, such as the wolf or fox. The egg-removal program was initiated years ago by Ernie Kuyt, an Edmonton-based scientist who reasoned that one egg could be taken and used for artificial propagation programs. The idea was so successful, says Boyce, that the whooping crane'...

Wolves' top-down effect

...ow researchers were able to examine the effects of wolf exclusion on elk--wolves' preferred prey--on plants such as willow, which are favored by the ungulates, and on other species that depend on the willow habitat. Hebblewhite and his colleagues found that in the low-wolf area of Bow Valley elk populati...

Genome Sequence for Haemophilus Influenzae Completed

...es to Yellowstone National Park.) Weisel examined wolf prey hair with light and electron microscopy with the idea of accurately identifying wolf diet from wolf scat. "While we have engaged molecular biologists in studies of animal genetics and i...

Otter adaptations: How do otters remain sleek and warm

...es to Yellowstone National Park.) Weisel examined wolf prey hair with light and electron microscopy with the idea of accurately identifying wolf diet from wolf scat. "While we have engaged molecular biologists in studies of animal genetics and i...

Ocean climate predicts elk population in Canadian Rockies

...nd that the combination of positive NPO values and wolf predation were related to 50 per cent declines in the elk population. Hebblewhite noted that positive NPO values and severe weather in the Canadian Rockies are occurring more frequently, and the trend is likely related to global warming. However, he...

Gray wolves maintain the food chain in winter

...buffered by a top predator - the reintroduced gray wolf (Canis lupus). Gray wolves inhabited most of Nort...ed with a changing climate. Their models show that wolf kills temper the potentially devastating effects of climate-related carrion shortages on scavengers....

Dinosaur DNA? New Patent Covers Degraded DNA recovery

...n mummies and two extinct species -- the marsupial wolf and ground sloth. Plant DNA up to 400,000 years old, and DNA from the extinct mammoth and steppe bison have been recovered from Siberian sediments. In 1997, Patent #5,593,883 was granted to Ambergene Corporation for the recovery of live ancient bacte...

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