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Tag: "reserve" at biology news

Learning to fight an adversary that won't stay down

...the clinicians rightly try to keep these things in reserve for when they are really needed." ...

UCLA study assesses cost-effectiveness of Hepatitis B drugs

... medicine as well ?to use "hybrid" treatments that reserve expensive yet effective drugs for specific patients who have shown no success with other treatments." Spiegel notes that the general cost-effectiveness standard accepted by society and many insurers for treating a chronic condition like hepatitis B ...

Mechanism for the captation of nutrients in plants- unknown to date

...ly distributed around the plant), the cells of the reserve organs - such as roots, tubers, seeds or fruits - "swallow up" nutrients in order to metabolise and store them. These "swallowed-up" substances are incorporated into micro-vesicles that end up pouring their contents into an internal compartment of a ...

Vietnam war technology could aid elephant conservation

..., the new technique could provide crucial data for reserve planning and management. "Conservation management would be improved by more accurate methods for monitoring and estimating the size of elephant populations or other large mammals in central Africa, as these populations are relatively small and threat...

Penguin chicks exposed to human visitors experience spike in stress hormone

... he said. The research was conducted at a penguin reserve at Punta Tombo, Argentina, with three separate sampling periods in November and December 2001 and January 2002. Chicks aged 6 to 7 days were captured and blood was drawn to measure the level of a hormone called corticosterone. The first sample was ob...

DNA from feathers tells tale of eagle fidelity

...ify individual Eastern imperial eagles in a nature reserve in Kazakhstan. Their analysis showed that not one ...nik (Naurzum State Nature Reserve), a large nature reserve in northern Kazakhstan. This reserve supports an unusual diversity of raptors and is home to no less...

New partnership to clear landmines for African Elephants

...re-establish themselves in the region. Sustainable reserve and ecotourism programs can then be developed to ensure the protection of elephants and other wildlife while benefiting local agriculture and economic development. The demining will occur in coordination with the National Government of Angola, the P...

Prenatal exposure to marine toxin causes lasting damage

...s, suggesting that the animals had less functional reserve with which to solve memory tasks, the researchers said. "Brief, low-dose domoic acid exposure in rats during gestational development results in subtle neurobehavioral impairments that persist into adolescence and adulthood," Levin said. "Furthermor...

Deep treasure to be found in Oculina Bank

... fisheries are changing over time, and whether the reserve and enforcement are working," says Reed. A final goal for the cruise will be to collect samples of Oculina coral whose genetics will be analyzed back on land and compared against that of Oculina found in shallow water, which is much more common. T...

Plants, too, have ways to manage freeloaders

...th roots of the six species of lupine found on the reserve site. They then tested 10 of these strains to see... from six different stands of yellow lupine on the reserve site. As the seeds sprouted, they inoculated the potting soil with various pairs of the three strain...

Oceans are 70 percent shark free

...de added: "As far as we can see there is no hidden reserve of sharks in the deep sea. All we see, is all there is, it's highly unlikely we are going to find anymore." ...

Satellites show Amazon parks, indigenous reserves stop forest clearing

...e previous studies had queried park managers about reserve performance, this study is the first to evaluate the effectiveness of tropical protected areas against forest clearing using quantitative analysis of satellite data. The group used satellite-based maps of land cover and fire occurrence between 1997 a...

Deep-rooted plants have much greater impact on climate than experts thought

...g the prolonged dry season because of this private reserve of water banked during the wet season by the tap roots," said Dawson. "Just as perspiration cools us off, increased transpiration by trees in June and July explains the drop in temperature in the Amazon." This effect changes the way the atmosphere h...

Crucial site for endangered frogs and birds saved

...of Fundación ProAves. "Not only is creation of the reserve a landmark for Colombian conservation, it is a fine example of international collaboration." In late December, Fundación ProAves learned of the impending sale of plots from the site for construction of vacation homes. It alerted the Alliance for Zer...

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

...es. The team observed about 49 acres of one forest reserve had been cleared for bean and tobacco farms. 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...

Butterfly farming to help save rain forest

...in Forest Conservation in Guyana. The conservation reserve around that centre and the surrounding North Rupun...h the indigenous Amerindian communities within the reserve and the surrounding North Rupununi District with the ultimate aim of enhancing the livelihoods of th...

Tigers get a business plan

...yanmar's Hukawng Valley ?the world's largest tiger reserve ? while stepping up anti-poaching activities in other sites, including Thailand's Huai Kha Khaeng and Thung Yai protected areas. In some sites, like the Russian Far East, tiger numbers may not increase from their current estimated population of 500...

Race to halt global amphibian crisis boosted by rediscovery of endangered Colombian frogs

...a massif, on the Caribbean coast of Colombia. The reserve is an important home for threatened species, and i...n-winged Warblers. Fundación ProAves staff at the reserve and Magdalena University researchers found the two rediscovered frog species while conducting resear...

Acid rain causing decline in sugar maples, say researchers

... Brook Experimental Forest (HBEF), a 3,160-hectare reserve near North Woodstock, N.H., where scientists have measured soil composition for the past 50 years. The scientists added nutrients in a test plot to replicate soil conditions that existed prior to the loss of sugar maples over the past 25 years. Nit...

Gene therapy prevents the onset of diabetic symptoms in mice

... Brook Experimental Forest (HBEF), a 3,160-hectare reserve near North Woodstock, N.H., where scientists have measured soil composition for the past 50 years. The scientists added nutrients in a test plot to replicate soil conditions that existed prior to the loss of sugar maples over the past 25 years. Nit...

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