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Tag: "declining" at biology news

Crucial site for endangered frogs and birds saved

...ound there. The site is a vital stopover point for declining neotropical migratory birds that breed in the United States and Canada, such as the Cerulean and Golden-winged Warblers. All three conservation groups ?ABC, CI, and Fundación ProAves ?are among the 55 members of the Alliance for Zero Extinction (www...

Pesticides in the nation's streams and ground water

...t concentrations of these pesticides may have been declining in some urban streams even before 2001--benchmark ...late in the study. A case study of diazinon shows declining concentrations in several urban streams in the Northeast during 1998-2004. In agricultural streams,...

Contaminants linked to sturgeon decline in Columbia river

... sturgeon populations in the Columbia River may be declining due to the presence of elevated amounts of foreign chemicals including DDT and polychlorinated biphenyls in their bodies, according to new studies by researchers at Oregon State University. The research by Carl Schreck and Grant Feist, biologists i...

One fish, two fish: New MIT sensor improves fish counts

...d at a horrible rate," said Makris, who attributed declining populations to overfishing, a problem that has been abetted by inaccurate fish counts. "One of the reasons (for the inaccurate counts) is the darkness in the ocean. You don't know what's going on." Current surveying methods depend on highly localize...

African amphibians make extreme parental sacrifice: The skin off their backs

...wing about amphibian populations that appear to be declining worldwide. Our discovery underscores the need for further studies to better document the amazing diversity of amphibian life history strategies and greater efforts to conserve it." Nussbaum collaborated on the research with Alexander Kupfer and Mark...

Cholesterol gets 'thumbs up' for role in digit development

...ffuses out across the developing limb bud, and the declining concentrations (or gradient) of the protein dictate the identity of the other digits. "Questions have remained about what regulates the Sonic hedgehog gradient,"said Chiang. "And we've been working on that for a number of years." One clue about th...

Infant transplant patients resist infections that kill adult AIDS patients

... of AIDS, cancers and diseases of aging related to declining function of the immune system. "We are very excit...us help people with age-related diseases caused by declining immunity, or AIDS, or cancers, and understand why certain people tend to be more susceptible to infe...

Genetic analysis of Asian elephants in India reveals some surprises

...ed by the Brahmaputra River. Despite the low and declining numbers of Asian elephants, relatively little is known about their genetic diversity--information that is crucial to plans for preserving the species. An earlier study of elephants in southern India by the same group identified two distinct populatio...

New amphibian species result from exploration, not from rule changes

...e, amphibians are, for reasons not entirely clear, declining more rapidly than either mammals or birds, underscoring the importance of an accurate evaluation. An analysis published in the August 2005 issue of BioScience, the monthly journal of the American Institute of Biological Sciences, indicates that, con...

Chernobyl: The true scale of the accident

...ed marketing problems and led to falling revenues, declining production and the closure of some facilities. Com...nd may even be spreading. Life expectancy has been declining across the former Soviet Union, due to cardiovascular disease, injuries and poisoning, and not radia...

Restaurant seafood prices since 1850s help plot marine harvests through history

...113 gram) weight increments, another reflection of declining supplies, says Dr. Jones. "It's interesting on menus today to see the appearance of four and five pound (1.8 to 2.3 kilo) lobsters," he notes. "There is little chance those are coming from the inshore fisheries, which are so heavily fished a lobster...

Experimental shingles vaccine proves effective in nationwide study

... The two major risk factors are increasing age and declining immunity. Half of all people who live to age 85 will get the disease. Experts estimate more than a million new cases of shingles occur in the United States each year. The trial was conducted at 22 study sites nationwide, including 16 VA medical cent...

Time and money make a difference in endangered species recovery

...all, about half of species protected are no longer declining and only 35 % of species protected for 13 years or more were still declining. Status trends are partly explained by taxonomy and funding. Species reported as receiving more money from the U.S. Fish and Wildlife Service or National Oceanic and Atmosph...

Primates on the brink

... fuel wood continues to be the major factor in the declining number of primates, according to the report. Hunting for subsistence and commercial purposes also is a major and insidious threat, especially in Africa and Asia. Live capture for the pet trade also poses a serious threat, particularly to Asian specie...

Elephant seal pups suffer from ocean warming

...decrease in mass gained). After 1999, however, the declining trend abruptly stopped and the weaning weight of the pups increased to eventually reach 130 kg. This change coincided with the cooling of the ocean at the beginning of the new century. "Despite ranging widely and foraging deeply in cold waters beyon...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...d- to late-18th century as a way to supplement the declining harvest of sea otter pelts. But the practice escalated between the 1890s and the 1930s, when the U.S. government worked to establish fox farming businesses on the islands. Mostly arctic foxes and smaller numbers of red foxes were introduced to more t...

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