Popular Population News and Current Events

Popular Population News and Current Events, Population News Articles.
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Choosy amphipods
Amphipods of the species Gammarus roeselii guard their chosen mates, often carrying them with them for days and defending them against potential rivals. This behavior requires a lot of time and energy, so that the males make their choice with care. Scientists at Goethe University have now investigated under which circumstances males are prepared to revise their decision. (2019-02-07)

Are older adults with knee pain less active than the general population?
A new Arthritis Care & Research study found that moderate-to-vigorous physical activity levels are similarly low in older adults with symptomatic knee osteoarthritis and those from the general population without osteoarthritis or knee pain. (2018-02-22)

Impacts of windfarm construction on harbor porpoises
Scientists from Germany, Denmark and the UK have built a model tool to predict what happens to marine animals when exposed to noise from the construction and operation of wind farms at sea. (2018-05-07)

Certain pain medications linked to increased heart risks
Use of nonsteroidal anti-inflammatory drugs (NSAIDs) was associated with an 18 percent increased risk of atrial fibrillation -- an irregular, often rapid heart rate -- in a study of middle-aged adults in Taiwan. (2018-03-21)

Can population policy lessen future climate impacts?
Population has been seemingly left out of climate change assessments, including by the Intergovernmental Panel on Climate Change. (2018-08-16)

Will future population growth be limited by freshwater availability?
The global human population is growing faster than the water supply. Investigators recently analyzed various models and trends to assess both optimistic and pessimistic projections of future water use and shortages. (2015-03-16)

University of Guelph researchers create tool to manage urban cat population crisis
Guelph researchers have developed a unique model that accurately calculates urban cat populations. It's the first to account for overall cat population dynamics and include calculations for the three subpopulations -- owned cats, stray cats, and cats in the shelter system. There are about 10 million to 120 million free-roaming and feral cats in North America. This model will give cities the accurate numbers needed to effectively manage the current cat population crisis. (2018-02-28)

Research rethinks the evolutionary importance of variability in a population
It's been long thought that variability within a population is key to population's growth and survival but new research questions that assumption. Harvard researchers found that variability can actually lower population growth in single-cell organisms. This insight is important for characterizing the fitness of a population, which is useful, for instance, in understanding how bacteria respond to antibiotics. (2017-10-04)

Are we pushing animals over the edge?
Species of mammals and birds are threatened with extinction as a result of rising human population density, according to a study published in Springer's journal, Human Ecology. The work is also the first to show that the exponential growth of the human population will continue to pose a threat to other species. In other words, there does not appear to be a threshold above which population growth would cease to have an incremental negative effect. (2013-06-19)

Brazil faces major challenges in liver transplantation
A recent analysis indicates that more than 1,700 liver transplantations are performed annually in Brazil. While Brazil performs more liver transplant surgeries than anywhere else in Latin America and is third worldwide in absolute terms, the country averages only 5 to 10 liver transplants per million population due to its increasing population and inadequate donor organ supply. (2016-08-01)

Research proves South East Asian population boom 4,000 years ago
Researchers have uncovered a previously unconfirmed population boom across South East Asia that occurred 4,000 years ago, thanks to a new method for measuring prehistoric population growth. (2018-09-20)

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)

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)

Leopard coral grouper: Overexploited
Researchers measured the population stock in Saleh Bay, Indonesia of the commercially valuable leopard coral grouper (Plectropomus leopardus), a species subject to population collapse due to high fishing pressure. (2019-06-06)

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)

Humans responsible for 62 percent of cougar deaths in re-established populations
The reintroduction of mountain lions across the mid-western United States has made species management an urgent area of research for conservationists. A report in the Wildlife Society Bulletin explores the fatal cost of human interaction with cougars and asks what state agencies can do to protect both species. (2014-03-03)

The decline of state-level IVC filter utilization
National inferior vena cava (IVC) filter utilization in the Medicare population has declined over the last decade according to a prior Harvey L. Neiman Health Policy Institute study published in 2018. How IVC filter utilization has varied at the state level and different payer populations during the recent decline in utilization is unknown. This new AJR study assesses state level IVC filter utilization & expands the population set to include Medicare and privately insured population. (2019-04-04)

Counting the uncounted
Though abundance is a fundamental measure in ecology and environmental management, detecting all individuals in a population is usually impossible when monitoring, so estimates of abundance must account for imperfect detection. (2019-06-06)

Majority overestimates US gay population, could influence gay rights policies
The public tends to overestimate the American gay and lesbian population, and those who do so are less likely to support equal rights measures, according to a new study by two University of Kansas political scientists. (2017-10-16)

Lead fishing tackle may be threatening loon populations
A new study published in the Journal of Wildlife Management reveals the devastating effects of lead fishing tackle on loon populations. (2017-10-12)

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)

Between extinction and survival of endangered populations
Populations of endangered species reach a critical point and therefore, efforts to predict and prevent their extinction require a thorough understanding of the underlying mechanisms. In a new study published in EPJ B, Hatem Barghathi has investigated how environmental disturbance at random times could cause strong fluctuations in the number of individuals in biological populations. They found that environmental disorder can lead to a period of slow population increase interrupted by sudden population collapses. (2017-07-12)

The ancient history of Neandertals in Europe
Parts of the genomes of two ~120,000-year-old Neandertals from Germany and Belgium have been sequenced at the MPI for Evolutionary Anthropology. The analyses showed that the last Neandertals, who lived around 40,000 years ago, trace at least part of their ancestry back to these European Neandertals that lived around 80,000 years earlier. The 120,000-year-old Neandertal from Germany, however, carried some ancestry that may originate from an isolated Neandertal population or from relatives of modern humans. (2019-06-26)

At what size does a minority group become influential?
When a viewpoint is held by a minority, what size does that minority need to reach to hit a tipping point, where their view becomes widely accepted in the rest of the population? (2018-06-07)

Bee dispersal ability may influence conservation measures
The abilities of various bee species to disperse influences the pattern of their population's genetic structure, which, in turn, can constrain how they respond to environmental change, as reported by an international team of researchers. (2019-02-07)

UTHealth: Rapid population decline among vertebrates began with industrialization
Rapid population decline among vertebrate species began at the end of the 19th century when industrialization was at its peak, according to researchers at the University of Texas Health Science Center at Houston and the Chinese Academy of Sciences. (2016-12-15)

Lizards demonstrate rapid evolution in the face of extreme cold
By studying a population of lizards before and after a sudden cold snap that struck the US, scientists have observed how the surviving population underwent rapid adaptation in response to the event. (2017-08-03)

Origin of Scandinavian wolves clarified
There are no signs that hybrids of dog and wolf have contributed to the Scandinavian wolf population -- a matter that has been discussed, especially in Norway. These wolves appear to have originated from the Nordic region or adjacent parts of Northern Europe, new genetic research from Uppsala University shows. (2019-03-29)

Competition with humans responsible for decline of New Zealand's endangered sea lions, study shows
Marine researchers in New Zealand have identified the direct impact of fishing as the largest known human factor in the decline of the endangered native sea lion population. The team's findings, published in Mammal Review, discount non-human factors, such as disease and identifies resource competition and by-catch incidents as the most likely causes. (2011-08-02)

Third to half of UK population lives with chronic pain
Between a third and half (43 percent) of the UK population -- roughly 28 million adults -- lives with chronic pain, finds an analysis of the available evidence, published in the online journal BMJ Open. (2016-06-20)

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

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. (2007-10-23)

This week in Molecular Biology and Evolution
On the road to our modern human lineage, scientists speculate there were many twist and turns, evolutionary dead ends, and population bottlenecks along the way. But how large were population sizes of common ancestors of the great apes and humans, and does the genetic analysis support the prevailing views of a great bottleneck in primate evolution? (2013-10-15)

Will Mexico's aging population see cancer care as a priority?
Mexico is the second largest economy in Latin America -- and its population is aging rapidly. Researchers offer new predictions and suggestions for lessening the impact of Mexico's cancer burden. (2015-05-08)

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)

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)

Project to estimate the size of the lesbian, gay and bisexual community in England
Public Health England (PHE) has commissioned a health service research team from Plymouth University Peninsula Schools of Medicine and Dentistry (PUPSMD) to model the size of the LGB population in England. (2016-02-15)

Sustainable Development Goals lead to lower population growth
Achieving the Sustainable Development Goals would significantly slow population growth, according to a new study. (2016-11-29)

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)

Liver problems will likely increase in adults
A new study indicates that liver scarring (or fibrosis), which can ultimately lead to liver failure, is fairly common. It was especially prevalent in individuals with diabetes or steatosis, the latter of which occurs when fat cells infiltrate the liver. (2015-08-18)

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