Tag: "populations" at biology news
Climate change plus human pressure caused large mammal extinctions in late Pleistocene
...greater today because of impoverished large animal populations
and surging populations
of humans taking over former large-animal habitats. "Human activities today, combined with climate c...
Houston minority graduation rises in sciences, engineering as result of UH-led alliance
...titutions with significant enrollments of minority populations
underrepresented within STEM professions. The program requires awardees to establish meaningful partnerships among academic institutions in their respective geographic areas and encourages the inclusion of government agencies and laboratories, indus...
New Arizona State center brings science to policy on issues of water resources and urban growth
...the NSF centers could be felt for years to come as populations
move to areas that struggle to achieve sustainability. "DCDC is a model of our commitment to research with a purpose, which in this case is ensuring a sustainable future for our desert regions," said Arizona State University President Michael M. C...
Conference at UH opens doors for new scientists, engineers
...titutions with significant enrollments of minority populations
of Hispanic, African-American, Native American and Pacific Islander descent underrepresented within STEM professions. Others in the H-LSAMP consortium include Texas Southern University, UH-Downtown, UH-Victoria, Rice University, Texas State Univ...
Researchers devise potent new tools to curb ivory poaching
...reased. It is relatively easy to monitor elephant populations
with flights over the open savannas of eastern, ce...ign tusk origin. They noted genetic differences in populations
from one location to another, and used a statistical method to extrapolate genetic signatures to fil...
Tracing genes, biologists show lizard migration is traced to Florida
...olis sagrei, the researchers found that introduced populations
of the lizard in five different countries can be t...were able to identify Florida as the source of new populations
in the other countries by finding genetic variation shared by Florida and the other introduced popul...
Wolverine takes a road trip
...m only one individual, they suggest that wolverine populations
may function over a huge geographic scale. Sustaining wolverines in the Greater Yellowstone Ecosystem will benefit from efforts to maintain habitat between increasingly fragmented mountain ranges, as well as cooperation across a variety of agencies a...
Health of world's sea lions the focus of Wakefield Symposium
...nterspecies comparisons can shed light on why some populations
might decline while others increase. Insights can ...ificantly contribute to understanding why sea lion populations
fluctuate, including populations
of Alaska's Steller sea lions....
Key stimulator of colorectal cancer identified
...PARd may encourage abnormal cell growth in certain populations
at risk for CRC. In addition, it is possible that blocking PPARd might prove useful for prevention and/or treatment of CRC." ...
Research suggests new avenue for stopping, preventing colon cancer
...lta "may encourage abnormal cell growth in certain populations
at risk for colorectal cancer," DuBois cautioned. DuBois credited Sudhansu K. Dey, Ph.D., who directs the division of Reproductive and Developmental Biology at Vanderbilt, with maintaining the PPARdelta "knockout" mouse colony that made the study pos...
Genes expose secrets of sex on the side
...ome DNA and mitochondrial DNA from three far-flung populations
of humans: the Khoisan of southern Africa, Mongoli... southern African, Mongolian and Papua New Guinean populations
studied. The finding tends to rule out some global beneficial mutation as the reason Y-chromosome DN...
Algal contact as a trigger for coral disease
...ed abundance may be essential if significant coral populations
are to survive on coralreefs....
US investment firm gives away Rhode Island-sized lands in Chile
...WCS has helped create protected areas to safeguard populations
of Magellanic penguins, South American sea lions, southern elephant seals and southern right whales. During the 1980s and 1990s, WCS expanded its activities to include other marine sites, and recently helped to establish the Patagonia Coastal Zone M...
Tips from the Journals of the American Society for Microbiology
...w technologies, the researchers analyzed bacterial populations
in fresh raw milk, and raw milk that had been refrigerated for 24 hours. "Many of the species identified after refrigeration were present in the initial sample. However, the relative proportions of bacterial were clearly altered ...
European common frog found to use novel mating strategy
... meters (8,500 feet). While studying high altitude populations
in an attempt to understand how they adjust to short breeding seasons and survive dry, freezing temperatures, Vieites, then at the Universidade de Vigo in Vigo, Spain, was surprised to see males embracing clutches. He and his colleagues spent two yea...
Lecture on ecology of infectious diseases
...gers with the tools necessary to protect declining populations
of prairie dogs and to minimize public exposure to plague. Who: Sharon Collinge, principal investigator, NSF-NIH Ecology of Infectious Diseases Program What: Lecture on plague, prairie dogs and humans When: Monday, September 20, 2004...
Researchers report new gene test for isolated cleft lip and palate
...on with the birth defect, and this was true in the populations
that we analyzed from The Philippines, Denmark, and the United States." Based on a detailed analysis of 1,316 families, the scientists estimated that the risk of parents with this haplotype having a second child with isolated cleft lip and palate is...
Hunting illusive signs of natural selection
...f the population." Neutral demographic changes in populations
occur because separated populations
drift apart, decimated populations
expand from smaller gene pools, and populations
mix with each oth...
Viral suspect for amphibian decline traced to human spread through bait
...ated as a cause of infectious disease in amphibian populations
in the western U.S. The genetic study indicates th...ost of possible causes in the decline of amphibian populations
worldwide. Early in the project, the team began to focus on two apparently "emerging" pathogens in ...
Do genes respond to global warming?
...a taken from contemporary animals. Studying these populations
in space and time--an approach the authors call "p...ce Age--that had different effects on local mammal populations
depending on their habitat preferences. Habitat specialists, the vole and pocket gopher live in the ...
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