Cougar Population Current Events | Cougar Population News
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U of Minnesota-led study finds that hunters are depleting lion and cougar populations
Sport hunters are depleting lion and cougar populations as managers respond to demands to control predators that threaten livestock and humans, according to a study published in the June 17 issue of PLoS ONE. view more (2009-06-18)
Cougar predation key to ecosystem health
The general disappearance of cougars from a portion of Zion National Park in the past 70 years has allowed deer populations to dramatically increase, leading to severe ecological damage, loss of cottonwood trees, eroding streambanks, and declining biodiversity. view more (2006-10-25)
Improved estimates of population extinction risk (Harding and McNamara)
An important application of theoretical ecology is in estimation of species extinction risk. Extinction models guide the selection of management regimes for endangered species. Two vital parameters in these models are the mean population growth rate and its variance. However, empirical data on population growth are rarely perfect, but are... view more... (2003-12-10)
Mean Population Size Increases with Diversity
A long-standing debate in ecology has been the effect of diversity on the temporal stability of biological systems. Ecological theory predicts that the stability of populations should decline as community diversity increases, in part, because population size is assumed to decline with community richness. In the February issue of Ecology Letters,... view more... (2003-01-28)
Risk threshold of daily alcohol intake and drinking duration in liver injury?
Alcoholic threshold effect rather than a dose-response effect on mortality from alcohol-related liver injury. Alcohol intake, rather than the type of alcoholic beverage, was more significant to liver injury. view more (2008-05-21)
Ouch! Taking a Shot at Plague: Vaccine Offers Hope for Endangered Ferrets in Plague Outbreak
Endangered black-footed ferrets, like children, aren't exactly lining up to be stuck with a vaccine, but in an effort to help control an extensive outbreak of plague in South Dakota, some of the ferrets are getting dosed with a vaccine given by biologists. view more (2008-07-17)
Twins have lower risk of suicide than general population
Twins have a lower risk of suicide compared with the general population, concludes a study in this week’s BMJ. view more (2003-08-12)
DNA research flies high with Seychelles kestrel
A new research project at the University of Kent is looking for genetic evidence of a historical population bottleneck in the Seychelles kestrel by analysing DNA extracted from museum specimens estimated to be 100-150 years old. Dr Jim Groombridge, Lecturer in Biodiversity Conservation at the University's Durrell Institute of Conservation and... view more... (2004-06-01)
Counting sheep in climate change predictions
Climate change can have devastating effects on endangered species, but new mathematical models may be able to aid conservation of a population of bighorn sheep. view more (2009-06-01)
Buried coins key to Roman population mystery?
University of Connecticut theoretical biologist Peter Turchin and Stanford University ancient historian Walter Scheidel recently developed a new method to estimate population trends in ancient Rome and waded into an intense, ongoing debate about whether the state's population increased or declined after the first century B.C. view more (2009-10-06)
Titanic survivors lived no longer than general population
In the closing song of the 1997 film Titanic, the heroine tells us that her heart "must go on and on" but a study in this week's Christmas issue of the BMJ shows that Titanic survivors lived no longer than the general population. view more (2003-12-17)
New population of Iberian lynx raises hope, says World Wildlife Fund
Spanish authorities have announced they have discovered a previously unknown population of Iberian lynx, triggering hope for one of the world's most endangered cat species, said World Wildlife Fund today. view more (2007-10-24)
Fly population set to double with global warming
A leading biological scientist from the University of Southampton is warning of massive increases in the UK's fly population if temperatures continue to rise. view more (2004-09-27)
Floating lovers count too — in the health of eagle populations
In a paper from the November issue of The American Naturalist, Vincenzo Penteriani, Fermín Otalora, and Miguel Ferrer, researchers at the Estación Biológica de Doñana (Consejo Superior de Investigaciones Científicas, Spain), focus on the forgotten and invisible side of animal populations-the floaters. Floaters are dispersed individuals who... view more... (2006-11-02)
Pursuing the future of personal genomics
Giving Nobel Laureate James Watson his personal genome was just the beginning. In a future that promises similar information to much of the population, ethicists, scientists and physicians are only beginning to understand and consider the possibilities. view more (2007-09-21)
Cholera vaccine could protect affected communities
A vaccine used to protect travelers from cholera, an infection characterized by diarrhea and severe dehydration, could also be used effectively among those living in cholera-prone (endemic) areas. view more (2007-11-27)
Study finds cancer is the second most frequent cause of death in individuals with schizophrenia
People with schizophrenia die from cancer four times as often as people in the general population. view more (2009-06-22)
Screening for colorectal cancer should start at age 50
New estimates of the lifetime risk of developing colorectal cancer, published in the Journal of Medical Screening, suggest that screening should start at age 50 or 55 in the general population. For individuals with a family history of colorectal cancer, screening is recommended from age 40-44. Using cancer registry data, researchers in France... view more... (2000-11-20)
New discovery: Molecular variation in one gene affects the growth of natural populations
For the first time, ecologists have been able to show that molecular variation in one gene may affect the growth of a population in its natural habitat. view more (2006-04-26)
New study explains why hotter is better for insects
Organisms have been able to adapt to environments ranging from cold polar oceans to hot thermal vents. However, University of Washington researchers have discovered a limit to the powerful forces of natural selection, at least when it comes to the adaptation of insects to cold temperatures. view more (2006-10-03)
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