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Tag: "hunting" at biology news

To elude bats, a moth keeps its hearing in tune

...r over 50 years that moths can hear the ultrasonic hunting calls of their nocturnal predator, the bat. Moth e...at by using high ultrasound, bats would make their hunting calls inaudible to moths. However, as now reported by James Windmill and colleagues at the Universit...

Asia's odd-ball antelope gets collared

...ith the collapse of the Soviet Empire, unregulated hunting resulted in the recent startling decrease in saiga numbers. "Although Mongolia faces stiff conservation challenges as it transitions to a free-market economy, the saiga can easily emerge as a success story with a little scientific input and support...

Serengeti patrols cut poaching of buffalo, elephants, rhinos

... Outside of established reserves, using tourism or hunting expeditions to generate economic benefits for local communities is the cornerstone to enlisting their help in protecting wildlife, Hilborn says. But the community conservation programs initiated in Tanzania since 2000 occurred after stepped-up patrol...

Renewed dolphin slaughter prompts new campaign

...tium maintains that, in spite of the fact that the hunting of dolphins and use of their meat has waned in pop... (IWC), the treaty organization that regulates the hunting of the great whale species. ...

A human taste for rarity spells disaster for endangered species

...fter falling from a 12-meter tree, allegedly while hunting a rare egg. The Royal Society for the Protection o...rs suggest, that finished the bird off. And trophy hunting collectors have placed increasing pressure on rare species as their focus has shifted from killing t...

Save the whales? Sure, but how many?

...t they can be used by humans, consumptively (as in hunting or fishing) or non-consumptively (as in tourism.) Most models for sustainable use only conserve animals at the level of demographics, not ecology, Sanderson says. The highest standard for animal populations is achieving 'historical baselines' wher...

Trotting with emus to walk with dinosaurs

...ing about what the dinosaurs were doing, they went hunting for a modern analog animal they could study to help decipher the tracks. Large flightless birds are the most logical choice and are, along with all birds today, thought to be descended from dinosaurs. But not all of those alive today are good cho...

Scientists describe new African monkey genus ?first in 83 years

... hunt and kill Kipunji, and eat their meat. "Any hunting of the Kipunji or loss of its vulnerable habitat, with the latter probably increasing the frequency of the former, will further serve to threaten this important new genus," the authors conclude. ...

All the eggs in one basket

...ites as "extremely unlikely." Their data point to hunting destroying 24 nesting sites of the two species of turtles, which also severely thinned turtle populations at the remaining sites. Impact on Ecosystems Besides the loss of the turtles themselves, sea turtles were also ecosystem engineers in the ...

UGA researchers find that hunting can increase the severity of wildlife disease epidemics

...cal model that demonstrates how the combination of hunting and factors such as birth season and mating season... and health officials use caution when considering hunting or culling as a means to manage diseases as diverse as rabies, tuberculosis and even avian influenza...

First surveys of Tanzanian mountains reveal 160+ animal species, including new & endemic

...arms. Elsewhere, there was evidence of logging and hunting camps. These observations underscore the urgent need for additional conservation investment in the area and in helping limited forestry department staff with tiny budgets effectively manage the forest reserves. The Rubeho Mountains are part of the E...

African parasite makes component of fat differently from all other organisms

...earned about this new fatty acid-making pathway by hunting the trypanosome genome for stretches of DNA known to be involved in fatty acid synthesis in other organisms, like animals and plants. The researchers reasoned that knocking out the fatty acid-making genes would prevent the parasite from making myr...

Widespread elephant slaughter discovered in Chad

...the wet season has not been as well protected. All hunting of elephants in Chad is illegal, and the sale of ivory has been banned since 1989, though black-market trade is increasing. Zakouma is only about 150 miles west of the conflict area of Darfur and is in the path of recent rebel activity in Chad, thus ...

Value of services performed by insects tops $57 billion in US

...data on how much is spent annually on observing or hunting wildlife, and what proportion of the animals in those categories depend on insects for nutrition. For pest control, they looked at the amount of damage now incurred by pests, and, knowing that 65 percent of pests are controlled by other insects, calc...

Researches discover gene critical for protection against septic-shock-induced death

...al focus of treating sepsis. Researchers have been hunting for novel host genes that regulate inflammation as potential targets for the next generation of sepsis therapies. The incidence of sepsis in the United States ranges from 400,000 to 750,000 cases per year. Mortality due to sepsis is around 30 percent...

Amber reveals ecology of 30 million year old spiders

...ibutions of the spiders and comparing the distinct hunting traits of each species, Dr Penney found that web-s...an amber, but that there was no difference between hunting spiders in either region. It was also found the fauna of the amber producing trees in each region ac...

UF scientists trace origin of shark's electric sense

...uncanny ability to detect electrical signals while hunting and navigating. Now researchers have traced the origin of those electrosensory powers to the same type of embryonic cells that gives rise to many head and facial features in humans. The discovery, reported by University of Florida scientists in the...

Animal brains 'hard-wired' to recognize predator's foot movements, Queen's study suggests

...s Dr. Troje. Similarly, the creeping movement of a hunting cat can be interpreted in terms of disguising the ballistic component in its locomotion, he adds. "Our finding might also provide an explanation for seemingly irrational phobias towards animals that don't fit the ballistic movement pattern of a pro...

Chemical guidance of T cells leads to immunologic memory and long-term immunity

... active clones, which then sweep through the body, hunting down and killing infected cells. For CD8+ T-cell activation to occur in the lymph node, the cell must encounter its target antigen--but that antigen must be displayed on the surface of another immune system cell, called a dendritic cell. Usually a ...

Testes to incubate stem cells

...riola pointed out. The Dutch researchers are also hunting for the ideal conditions and nutrients that will coax spermatogonial stem cells into becoming sperm. So far, they have found that growth factors GDNF and fibroblast growth factor (FGF) seem to be necessary to enhance cell growth. The team's next move...

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