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Tag: "sheep" at biology news

The mouflons of the Kerguelen archipelago

...ed the ecology and behaviour of mammals (mouflons, sheep and reindeer) introduced into the Islands. Ten years later, Renaud Kaeuffer, a doctoral student in biology at UQAM, supervised jointly by Denis Réale and Dominique Pontier of the Université Claude Bernard Lyon I in France, went to the Islands to s...

Tundra disappearing at rapid rate

... land, says Danby. Tundra species like caribou and sheep populations, which are important parts of that lifestyle, have declined across southwestern Yukon. As treeline advance, the reflectance of the land surface declines because coniferous trees absorb more sunlight than the tundra. This light energy is t...

Monitoring poisons in the environment -- a woolly matter

...sults of a pilot study assessing the use of upland sheep wool as a bio-monitoring device for natural levels...mount of copper and lead found in washed wool from sheep and in local streams. Median copper concentration in North Ronaldsay wool was comparatively high des...

Cloned mice created from fully differentiated cells, a milestone in cloning research

...studies provide compelling evidence that Dolly the sheep and other mammals cloned by somatic cell nuclear transfer were most likely derived from fully differentiated cells, not adult stem cells, as most have argued in the nine years since Dolly was first created. Because stem cells have the ability to self...

Researchers discover that sheep need retroviruses for reproduction

...n as endogenous retroviruses related to Jaagsiekte sheep retrovirus or enJSRVs, are critical during the ear...kte Sheep Retrovirus or JSRV causes lung tumors in sheep and led to the death of Dolly, the world's first mammal cloned from an adult cell. The idea that end...

New evidence of early horse domestication

... Olsen. That created a more nomadic culture, since sheep and cattle are not well suited for sub-zero climat... winter. The tradeoff, she says, was that cows and sheep give far fattier milk year round, which can be made into yogurt and cheese. Sheep also provide wool....

Cougar predation key to ecosystem health

...deer or elk ?or domestic grazers such as cattle or sheep ?affect native biodiversity. ...

A new kind of mutation could explain numerous phenotypic variations in various species

...bit muscular growth. The mutation discovered among sheep exposed a recognition site for two miRNAs that are highly expressed in the muscle. In "mutant" animals, these miRNAs will consequently target the myostatin gene and block its translation. The result is that the absence of myostatin provokes a muscula...

Robots manipulating animal behaviour

...er! Two side-projects under Leurre also looked at sheep and chickens, animals that are happy to follow their 'leaders' ?unlike the cockroaches, whose collective behaviour is essentially 'democratic'. The researchers collected data and developed mathematical models describing the collective behaviour of sh...

Transgenic goat's milk offers hope for tackling children's intestinal disease

...ransgenic milk on ruminants -- animals like goats, sheep and cows -- which have multi-chambered stomachs. In both animal models, the results of this study indicated that the milk from the transgenic goats was impacting the growth of digestive-tract bacteria -- although with opposite results. The young ...

Federal testing for mad cow disease a failure, law review editor says

...ractice of "rendering," or recycling dead cows and sheep into protein for cattle feed, is believed to be widespread. Congress banned the practice in 1997 following evidence that feeding herbivorous cows the meat from dead animals can lead to the formation of abnormal proteins, or prions. The prions atta...

Ten years later, Dolly is still making headlines

...r the team who - 10 years ago - created the cloned sheep "Dolly," will kick off the 2006 American Association of Pharmaceutical Scientists' (AAPS) National Biotechnology Conference in Boston, June 18-21. At the meeting, nearly two-thousand of the world's leading scientists will discuss a variety of critic...

New egg freezing technique offers hope to hundreds of women

...which he first used for artificial insemination in sheep and cattle. He said: "The Cryotop method is a highly efficient freezing procedure that opens a new way to resolve the various aspects of the problem of human oocyte cryopreservation. Using this method, we achieved a more than 90% survival rate for t...

Afghanistan to protect wildlife and wild lands

...ncluding the Marco Polo sheep, the world's largest sheep and the namesake of one of the first European trav...lk routes to east Asia and who described the giant sheep in his writings in the late 13th Century. Other mammals known to occur in Afghanistan include the ib...

Spring migration of pink-footed geese under threat

...r migratory route north, the geese stop to feed on sheep pastures and emerging crops at Vesterålen in northern Norway so that they arrive in Svalbard in good enough condition to breed successfully. Populations of the goose have almost doubled over the past twenty years, from between 23,000 and 30,000 in t...

New evidence questions the simple link between prion proteins and madcow disease

...rent degrees of genetic resistance to scrapie ?the sheep form of the disease. When they injected material c...contained a high level of PrP. "Think about it ?a sheep grazing in a field is not naturally exposed to highly infected brain and could only pick up a tiny...

Oldest dated evidence of cattle in southern Africa found

...d evidence of cattle in southern Africa. Domestic sheep were also present at Toteng at about the same time...lahari. The discovery of the 2000 year old cow and sheep bones are important because of the long held view that the Kalahari was a comparatively isolated are...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

...Follow-up tests showed that the ovaries in the two sheep from which oocytes were recovered were still funct...e pedicle of the (removed) left ovary. Of the five sheep where normal blood flow resumed immediately, indicating that the transplant had succeeded, one had s...

US Army plans to bulk-buy anthrax

...re batches of an unspecified biological agent, and sheep carcasses to test the efficiency of an incinerator for the disposal of infected livestock. Although the Sterne strain is not thought to be harmful to humans and is used for vaccination, the contracts have caused major concern. "It raises a serious q...

Expanding forests darken the outlook for butterflies, study shows

...o increase the meadow areas, which animals such as sheep and elk like to inhabit. The offshoot is that it also helps smaller animals, such as the butterflies," Roland said. ...

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