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Tag: "hunting" at biology news

Researchers find 24 species believed new to science in Suriname rainforest

...ent of the region to address and halt threats from hunting and small-scale illegal mining. The report suggests that strategies should focus on protecting freshwater streams and preventing fragmentation of the natural habitat from unchecked or poorly planned development. The Guayana Shield region contains ...

The mouflons of the Kerguelen archipelago

...ntered there. “We got the missing DNA samples from hunting trophies and managed to go all the way back to the son of the founders,” said Denis Réale with a smile. “We were even able to obtain genetic material from the population of origin from the Vincennes Zoo. “We took the DNA from these samples, and looke...

Ice Age extinction claimed highly carnivorous Alaskan wolves

...ntroversial. It has been variously blamed on human hunting or climate change, or on a combination of factors as the Ice Age waned. For the specialized Alaskan wolves, the story is perhaps less complicated. “When their prey disappeared, these wolves did as well,” Leonard said. But the results of this stud...

New research shows sharks use their noses and bodies to locate smells

...d Atema. "Since dogfish feed primarily in the dark hunting for crabs, lobsters, shrimp and small fish, their reliance on information from their lateral line is essential. The results are interesting for our understanding of animal navigation under water and for the development of guidance of autonomous under...

Vaccine prevents prion disease in mice

...ould need a vaccine like this to protect people in hunting areas." He also noted that a vaccine that decreases the spread of prion disease in animals also reduces the possibility that the disease could infect humans. ...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...KILLER WHALES IN THE ACT Catching killer whales hunting their prey has been difficult, in part because the...mmals such as seals, refrain from vocalizing while hunting so that prey will not be alerted to their presence. When they begin feeding, they become more vocal...

Tibetan antelope slowly recovering, WCS says

... that's far more endangered than the chiru, due to hunting and hybridization with domestic yak. The group saw an increase in wild asses, too, though they are persecuted by nomads who believe they compete with livestock for grass. Schaller noted that some nomadic communities living in the Chang Tang regi...

Tracking sperm whales and jumbo squid

... warm, stressful conditions at the surface. "By hunting deep in this cold, hypoxic environment at night, as well as during the day, sperm whales may favor jumbo squid that are in some way compromised and thus easier to capture," the authors wrote. "This research provided a unique opportunity to learn m...

Remote sheep population resists genetic drift

...l attempt to establish a herd of mouflon for sport hunting on a remote island in the Indian Ocean 50 years ago has inadvertently created a laboratory for genetic researchers and led to a surprising discovery. A mouflon population, bred over dozens of generations from a single male and female pair transplant...

Renegade RNA -- Clues to cancer and normal growth

...ific sets of genes. Mendell's team is actively hunting for additional hidden microRNA elements that control other aspects of their behavior in cells. They also are curious to figure out what miR-29b is doing in the nucleus. Because microRNAs have been implicated in cancer as well as normal development, ...

DNA analysis reveals rapid population shift among Pleistocene cave bears

...rchers suggest that human influence in the form of hunting and competition for sheltering caves may represent a plausible explanation for the disruption in the cave bear population, creating an opportunity for the infiltration by a neighboring cave bear group. The authors note that though the new bears succe...

Chimpanzees found to use tools to hunt mammalian prey

... In the new work, researchers observed tool use in hunting by the Fongoli community of savanna-dwelling chimp...archers observed that tool-crafting and associated hunting behavior was systematic and consistent, suggesting that it was habitual. The hunting behavior includ...

Over a century after disappearing, wild elk return to Ontario

After disappearing from Ontario due to over hunting in the 19th century, wild elk have returned to the...erred, particularly due to wolf predation, illegal hunting and stress from the transfer process. However, the death rate is decreasing each year, suggesting th...

Global map shows new patterns of extinction risk

...are highly threatened across eastern Africa due to hunting and the bush meat trade The tropical, rainforest-clad mountains of northern Australia are home to many declining frog species, although the precise causes of these declines often remain enigmatic. ...

Fishy cooperation

... describe the astonishing discovery of coordinated hunting between groupers (Plectropomus pessuliferus) and g... comes "naturally" to two predators with different hunting specializations, and is therefore far simpler to achieve than for members of the same species. Also,...

Archerfish tune their shots to universal properties of prey adhesion

...d new levels of sophistication in the archerfish's hunting strategy that shed light on how this impressive pr...suggest that the tuning aspect of the archerfish's hunting strategy is not as plastic in response to learning as might have been thought. Instead, the strategy...

Ebola-outbreak kills 5000 gorillas

...ch they are dramatically less resilient to illegal hunting and other looming threats. Just as troubling are recent studies showing that the Ebola infection wave is spreading rapidly towards several of the remaining large protected areas in the region. Results from the new study suggest that protecting the...

Pattern of human Ebola outbreaks linked to wildlife and climate

...from scavenging dead animals and by promoting safe hunting and trapping practices, especially because the results show that outbreaks in wildlife populations have been much more frequent than previously believed. They emphasize that monitoring wildlife in collaboration with rural African residents could pr...

Does natural selection drive the evolution of cancer?

...une system often kills tumor cells like a predator hunting prey, and the tumor cells that develop defenses against the predation are the ones that survive and reproduce. An example of parasitism in the tumor environment can be seen in angiogenesis, in which a subset of tumor cells send chemical signals t...

Innovative movies show real-time immune-cell activity within tumors

... cell destruction, they became actively migratory, hunting for more tumor cells. In the absence of antigen, the T cells did not interact with tumor cells, and could not sustain an active migratory behavior within tumors." "There are several significant conclusions from these experiments," Weninger says. "F...

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