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HIV's impact in Zimbabwe explored in new research
The impact of HIV in Zimbabwe since the early 1980s is explored in new research published this week in the journal PNAS. Researchers found that HIV's impact on Zimbabwe's population as a whole has not been quite as severe as some predicted in 1989, when a group of epidemiologists at a World Health Organization meeting modelled its potential effects. (2007-08-27)

New research finds high prevalence of smoking among physicians in China
In this first-of-its kind-study, researchers found that 23 percent of 3,552 hospital-based physicians surveyed were smokers, substantially higher than in the United States (3.3 percent), where the smoking prevalence in the general population is 20.9 percent, and the United Kingdom (6.8 percent), with 25 percent prevalence in the general population. This rate is also higher than in Japan (20.2 percent), where the smoking prevalence in the general population is 33.8 percent. (2007-08-06)

Screening improves detection of major stroke risk factor
Actively screening people aged 65 or over in the community improves the detection of atrial fibrillation (irregular heart rhythm), a major risk factor for stroke, finds a study published online today. (2007-08-02)

MU researchers to study the status of black bears in Missouri
Researchers at the University of Missouri-Columbia are studying the status of black bears in Missouri. Black bears were abundant in the state during the 18th and 19th centuries, but have been considered almost extinct in Missouri since the late 19th century. The results of the MU study will be used by the Missouri Department of Conservation to help manage Missouri's black bear population. (2007-06-13)

Climate change could trigger 'boom and bust' population cycles leading to extinction
Climate change could trigger (2007-04-16)

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 enter the reproductive population when breeding territory or a potential mate become available. (2006-11-01)

Commercial fishing causes dangerous fluctuations in fish populations
Commercial fishing causes serious fluctuations in fish populations leaving them in danger of total collapse, says new research published today. These fluctuations mean current measures in place to control fish stocks may not be sufficient to ensure their sustainability. (2006-10-18)

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. (2006-10-02)

Brighter future for giant panda?
Scientists at Cardiff University, using a novel method to estimate population, have found that there may be many more giant pandas remaining in the wild than previously thought. (2006-06-19)

New discovery: Molecular variation in one gene affects the growth of natural populations
Ecologists have shown that molecular variation in one gene may affect the growth of a population in its natural habitat. Research Professor Ilkka Hanski, University of Helsinki, and Dr Ilik Saccheri, University of Liverpool, discovered that the population growth of the Glanville fritillary butterfly is affected by the allelic composition of the phosphoglucose isomerase (Pgi) enzyme. The result challenges previous views according to which allelic variation in populations, and possible consequent differences in individual performance, would be of no significance for population growth. (2006-04-26)

Ethnic groups need specialist services to tackle alcohol misuse
Ethnic minorities may have particular problems with alcohol use, yet may not be seeking help, warns a senior psychiatrist in this week's BMJ. He believes that these hidden populations need specific services - and more research. (2006-03-23)

Falling blood pressure not down to drugs, say experts
Blood pressure lowering drugs were not responsible for the population decline in blood pressure seen in many countries in the mid-1980s to the mid-1990s, concludes a study published online by the BMJ today. (2006-03-09)

Experimental evolution of yeast in the lab may illuminate early events in speciation
By experimentally promoting rapid, small-scale evolution within a lab population of yeast, researchers have shed light on the kinds of genetic changes that may underlie the emergence of new species. (2006-02-06)

Groundbreaking research sheds light on ancient mystery
A researcher at Rochester Institute of Technology is unraveling a mystery surrounding Easter Island. William Basener, assistant professor of mathematics, has created the first mathematical formula to accurately model the island's monumental societal collapse. (2005-08-31)

Tobacco control and healthier diets are key to cutting heart deaths
Encouraging everyone to stop smoking and eat healthier is four times more effective at reducing heart deaths than current government initiatives that target patients who already have heart problems, finds a study published online by the BMJ today. (2005-08-16)

Unease over guidelines that label 9 out of 10 people as sick
Guidelines that set ever lower thresholds for (2005-06-23)

Founding fathers & mothers: How many crossed the land bridge?
For the first time, we have a realistic estimate of how many ancients made that ice age trek across the long-lost land bridge from Asia to become the first Native Americans. Jody Hey, a professor of genetics at Rutgers, The State University of New Jersey, has developed a computational method that uses genetic information to create models of population divergence - where a group has split off from its ancestral population to pursue its own destiny. (2005-05-23)

Aboriginal Canadians at high risk for severe trauma
A new study by Shahzeer Karmali and colleagues in this issue of CMAJ shows aboriginal Canadians are at a high risk of sustaining severe trauma. (2005-04-11)

Spatial structure, dispersal, and management of a recovering raptor population
In this study, researchers from the University of California Santa Cruz show that the spatial structure of Peregrine Falcons in California has profoundly influenced the management and recovery of this species. (2004-11-09)

Promoting walking and cycling as an alternative to using cars: what works?
What measures persuade people to shift from using cars to walking and cycling? (2004-09-30)

2.8 percent of the US population suffers from excessive sweating
Hyperhidrosis, or excessive sweating, affects a much larger proportion of the U.S. population than previously reported, according to new research by a Saint Louis University dermatologist. (2004-07-28)

Malnutrition and misery will be 'unimaginable' by 2054
Nearly half the world's population of 6.3 billion people are malnourished -- more than at any time in human history -- but malnutrition, disease and human misery will worsen in the next 50 years, Cornell ecologist David Pimentel tells fellow scientists. (2004-02-13)

Titanic survivors lived no longer than general population
In the closing song of the 1997 film Titanic, the heroine tells us that her heart (2003-12-18)

Improved estimates of population extinction risk (Harding and McNamara)
An important application of theoretical ecology is in estimation of species extinction risk. Two vital parameters in extinction models are the mean population growth rate and its variance. Empirical data on population growth are rarely perfect and it has been unclear how sampling error influences extinction estimates. In Ecology Letters, January, McNamara and Harding show that sampling error has two opposite effects on estimates of population extinction risk. (2003-12-10)

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. (2003-08-14)

Cholesterol test at 50 spots those most at risk of heart disease
Measuring the cholesterol of everyone aged 50 years and over is a simple and efficient way of identifying those at high risk of heart disease in the general population, suggest researchers in this week's BMJ. (2003-06-26)

Mean population size increases with diversity
Investigations of the effect of diversity on populations have resulted in few clear patterns. In a recent Ecology Letters article, relationships between community diversity and population stability in unmanipulated annual plant communities are examined. The article shows that community diversity, population size and the temporal stability of populations covaried positively which suggests abiotic factors (e.g. productivity) may govern population stability to such an extent as to override potential effects of diversity. (2003-01-28)

European seal plague may threaten population survival
Scientists from Sweden and the USA report in an upcoming issue of the journal Ecology Letters that the 2002 outbreak of phocine distemper virus, or PDV, in European harbour seals may reduce the population by more than half and that future outbreaks with similar characteristics could significantly increase the risk of population declines. (2002-10-30)

South Asian patients are missing out on cholesterol drugs
Patients in general practices with a greater South Asian population are less likely to be prescribed cholesterol lowering drugs, despite being at a higher risk of coronary heart disease than white patients, finds a study in this week's BMJ. (2002-07-04)

Stanford biologist Paul Ehrlich to speak at NSF on population and the environment
Well-known author and population biologist Paul Ehrlich of Stanford University will speak at the National Science Foundation on the current state of the (2002-04-22)

Is medical school only for the rich?
In their survey of first-year medical students in Canada, Irfan Dhalla and colleagues found that medical students at Canadian medical schools differ significantly from the general population in terms of ethnic background and socioeconomic status. (2002-04-15)

Stroke victims at twice the risk of suicide
Stroke victims are at twice the risk of suicide, finds a study in the Journal of Epidemiology and Community Health. The increased risk remains for around five years after the stroke. (2001-11-12)

Human population growth already slowing
Human population growth has turned (2001-08-06)

Science study shows age, sex, weather, factors in fluctuating Soay Sheep population
Why do some animal populations fluctuate--abundant at times, or rare at others? Moreover, why would one group of animals fare differently from a similar group, under identical weather conditions? Those are questions ecologists constantly attempt to answer. Tim Coulson and his Cambridge University research team published the results of their 11-year study of wild Soay sheep will be published in the 25 May issue of the international journal, Science. (2001-05-24)

HIV population shifts following HAART
Highly active antiretroviral therapy (HAART) involves combinations of protease inhibitors and other drugs to block HIV proliferation. While there is abundant evidence that this approach reduces viremia, far less is known about its qualitative effects on the surviving HIV population. (2001-02-14)

IIASA releases scientific study linking population growth to climate change
Slower population growth would significantly reduce climate change over the next century and increase the ability of developing countries to adapt to changing climate patterns, according to a new study from the International Institute for Applied Systems Analysis (IIASA). (2000-11-27)

Population and climate change
The International Institute for Applied Systems Analysis (IIASA) and Cambridge University Press are pleased to announce the publication of Population and Climate Change by Brian C. O'Neill, F. Landis MacKellar, and Wolfgang Lutz. (2000-11-07)

Is a one child policy worldwide the solution to human population growth?
Commentators advocate two opposing views on what the future holds for population demographics in this week's BMJ. One view holds that population increase is not a cause for alarm. The opposing view is based on the belief that the population problem needs to be brought under control with interventionary measures. (1999-10-08)

As world population hits six billion, Yale experts provide insight into 21st century environmental challenges
On Tuesday, Oct. 12, the Earth's population is expected to reach six billion and Yale population expert Fred Meyerson says that unless action is taken, projected future population growth will lead to increased pressure on scarce resources such as land and water. According to Meyerson, we have the means to change the course of population growth, but we lack the political will. (1999-10-07)

Malthus + 200: Disastrous 'Correction' Looms
Two hundred years after the essay by T.R. Malthus that put (1998-03-25)

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