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Tag: "species" at biology news

Low oxygen likely made Great Dying worse, greatly delayed recovery

...more, in many cases nearby populations of the same species were cut off from each other because even low-alti... supercontinent but also a "superhighway" on which species would have encountered few roadblocks while moving from one place to another. However, it appears t...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...more, in many cases nearby populations of the same species were cut off from each other because even low-alti... supercontinent but also a "superhighway" on which species would have encountered few roadblocks while moving from one place to another. However, it appears t...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...other partners, have discovered Africa’s first new species of monkey in over 20 years, marking the third monk...tists have found in the last six months. The new species is described in the current issue of Science. The latest find is named the “Highland Mangabey?(Loph...

Stealth Worms May Improve Insect Pest Control

...es. In Arizona, Stock's team is collecting native species of EPN for pest control trials in citrus and icebe...diversity," Stock says. It's possible that similar species of nematodes can be used singly or together in reducing pest insect populations. Once the right nem...

Bobbing birds do it for a reason

...vior during walking is a characteristic of diverse species of birds, but how this behavior benefits the birds and under what circumstances it proves useful have remained uncertain. Researchers this week report findings that strongly suggest that for some birds head bobbing is critical for the stabilization o...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

... an external retrovirus that actively infected ape species in the past. "The reason retroviruses are so dead...don't know the impact the virus had on the primate species it did affect. They found many copies of the virus in the genomes of both species, but only a tiny f...

To Stop Evolution: New Way Of Fighting Antibiotic Resistance Demonstrated By Scripps Scientists

...t slowly over time, these mutations accumulate and species diverge. However, Romesberg and his colleagues believe that cells are not just the passive victims of random mutations, but have ways of initiating mutations in their own DNA. Evidence for this includes the fact that the rates of mutation in some ce...

Hydrogen and methane provide raw energy for life at 'Lost City'

...n rich organic sediments. However the diversity of species is low with, for example, just a handful of methane-producing and methane-consuming Archaea. In surprising contrast, researchers discovered Lost City has a diversity of "larger" organisms that's as high, or higher, than any known black-smoker vent s...

Making Sure Sacred Sheep Don't Become Extinct

...e there's enough genetic material to reintroduce a species if necessary. Much of his collection deals with important livestock such as Holstein cattle and Yorkshire pigs. But one of the collections Blackburn, who is the coordinator of the animal section at ARS's National Center for Genetic Resources Preserv...

Mother birds increase progesterone to hatch females

...nk they understand the mechanism that several bird species use to bias the sex ratios of their offspring toward female. By experimenting with domestic chickens, they have determined that the presence of higher-than-normal levels of the hormone progesterone during the first meiosis -- the cell division that ...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

... water vole (Arvicola terrestris) is an endangered species in the UK, and ecologists Dr Tom Moorhouse and Professor David Macdonald of Oxford University's Wildlife Conservation Research Unit had been monitoring the size of two populations - one in Norfolk and one Wiltshire - when they noticed a 48% decline i...

Cousin of Asian super termite invades Florida

...ey're not sure how much farther north the tropical species can move and survive. "Four buildings in a one-square-mile area of Riviera Beach are infested with the termite, and we believe there may be more infestations in the area," Su said. "We are asking those who think they have seen this termite to contac...

Researchers find gene that may be at root of potato blight

...don't stop with P. infestans. Related Phytophthora species cause root rot in soybean plants as well as sudden oak death, which is devastating stands of oak trees along California 's coast and is present in at least three other states. Kamoun conducted the multidisciplinary study with lead author Miles Armst...

Alarm pheromone causes aphids to sprout wings

Chemical communication within insect species is often much more sophisticated than expected. When aphids are attacked by predators such as ladybird beetles, they release an alarm pheromone, (E)-â-farnesene, that has long been known to cause other aphids to walk around or drop from the plant. I...

Butterfly migration could be largest known

...ance guard of one of the largest migrations of the species on record, said Arthur Shapiro, a professor and expert on butterflies at UC Davis. "This may be the biggest migration of modern times," Shapiro said. Shapiro said he is getting reports of "billions" of butterflies around Trona, near Death Valley, a...

Where bacteria get their genes

... material from their parental cells and from other species of bacteria. Ochman and his colleagues' work show...ertain that it's the result of an infection with a species of Streptococcus and can therefore prescribe an appropriate antibiotic. If you couldn't classify bac...

NHGRI targets 12 more organisms for genome sequencing

... wasp (Nasonia vitripennis) and two related insect species (Nasonia giraulti and Nasonia longicornis); a free...disease. For instance, the skate (related to many species of shark and cartilaginous fish) was chosen because it belongs to the first group of primitive verte...

Primates on the brink

... that 25 percent-or one in four-of the 625 primate species and subspecies are at risk of extinction. The repo...y the Bioko red colobus to show that other colobus species also are under extremely grave threat. "All evidence tells us that the first extinctions among Afri...

Chimp genome reveals a retroviral invasion

... element; the divergence of LTR sequences within a species can be used to estimate the age of an initial infection. Eichler and colleagues estimate that gorillas and chimps were infected about 3 -- 4 million years ago, and baboon and macaque about 1.5 million years ago. The disconnect between the evolutionar...

Internet viruses help ecologists control invasive species

...he limited resources available to control invasive species to be targeted at points on the network where they...ork and to reduce the rate at which non-indigenous species disperse to novel sites," Muirhead and MacIsaac conclude. The spiny water flea was first found in L...

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