Articles tagged with Human Population
A mathematical model suggests that social interactions between sedentary and moderately active people can stimulate higher levels of overall physical activity in a population. The model found that interacting with moderately active individuals helped sedentary populations become more physically active over time.
Researchers discovered that stillbirth can be inherited and tends to be passed down through male members of the family, particularly on the father's side. This trend was identified in a large study analyzing health histories of families over multiple generations.
A modelling study published in Scientific Reports suggests that modern humans (Homo Sapiens) and Neanderthals (Homo neanderthalensis) co-existed in Europe for as long as 5,000 to 6,000 years. The study estimates that the two species overlapped for between 1,400 and 2,900 years before Neanderthals became extinct.
The American College of Physicians recommends increasing funding for health services and prioritizing health promotion in Indigenous communities. Community-driven public policy is also necessary to address historical trauma, social determinants of health, and inadequate access to healthcare services.
A Finnish study found that retiring individuals experience an increase in sleep time and a corresponding decrease in physical activity. This shift is attributed to the absence of work-related activities and commute time, which are replaced by sedentary behavior.
Researchers mapped the spread of pathogens in wild macaque populations near human settlements, finding that monkeys with high human interactions cause larger outbreaks. The study used computer simulations to predict disease transmission and identified key factors influencing outbreak size.
A UTHealth Houston study found regional disparities in cancer screening rates tied to social vulnerability, with lower rates in more vulnerable counties. The study analyzed 3,141 US counties and discovered significant differences in breast, cervical, and colorectal cancer screenings.
A new scoring tool prioritizes countries with higher vaccination rates and vulnerable populations, aiming to allocate Covid-19 vaccines more fairly. The tool considers a broader range of factors than current global COVAX facilities, which have been criticized for insufficient access.
Researchers at MIT Sloan School of Management studied 93 countries and found more than half willing to tolerate higher death rates without NPIs. The US, however, may face high daily death rates exceeding 1,000 per day during winter months if past responsiveness continues.
A recent study published in The Lancet Global Health reveals stark differences in survival rates for children with retinoblastoma between high- and low-income countries. In low-income countries, the risk of death from retinoblastoma within three years of diagnosis is significantly higher, with over two-fifths of children dying within t...
A new study published in The Lancet Planetary Health found that heat and cold exposure are associated with substantial excess mortality in England and Wales. London had the highest heat-related mortality rate, while the risk of death from cold was highest in Northern England, Wales, and the South West.
A new study reveals that population declines have been greatest among species that migrate to areas with more human infrastructure, habitat degradation, and climate change. The research identified 16 human-induced threats to migratory birds, including infrastructure associated with bird disturbance and collisions.
A study of North American settlers in the St. Lawrence Valley found that female marriage ages increased while male marriage ages decreased due to a male-skewed sex ratio. The findings suggest that this demographic imbalance had significant effects on union formation and population dynamics.
A new Brazilian database of whole-genome sequences brings diverse genetic information to international databases, shedding light on the genetics of aging and disease in Brazil's elderly population. The study identified over 2 million novel genetic variants, providing insights into the health and well-being of older adults.
A University of Illinois review examines how food deserts, poor diet, and racial disparities affect bile acids, gut microbes, and cancer incidence. The study suggests that Western diets contribute to the development of colorectal cancer, particularly among Black Americans.
Researchers used a contrast pattern mining algorithm on publicly available data from 16,000 participants in the T1D Exchange Clinic Registry. The study found individuals with an immediate family history of Type 1 diabetes were more frequently diagnosed with hypertension and other co-occurring conditions.
Researchers at WorldPop created high-resolution population maps of the Democratic Republic of Congo using satellite imagery and small-scale household surveys. The study estimates population counts and age structures across multiple provinces, helping governments plan public health programs and infrastructure projects.
Researchers found that illegal human settlements have surged to over 50,000 in the Babile Elephant Sanctuary, posing a significant threat to the remaining 250 elephants. The team believes that addressing environmental, poverty, and security challenges jointly is crucial to restoring the sanctuary's integrity.
A University of Massachusetts Amherst scientist suggests that rising social stress may contribute to the projected global population decline starting in 2064. Stress from social media and other social interactions may be leading to changes in reproductive behavior and physiology, resulting in decreased reproduction rates.
A new model developed by NYU Tandon School of Engineering researchers provides a data-centric approach to reopening towns and can serve as a blueprint for areas with low vaccine rates. The model shows that increasing access to social gatherings and public transportation at a certain rate supports a safe, rapid reopening.
The Yakushima sika deer population has been declining since 2014, with an estimated annual decrease of 15%. The decline is attributed to natural factors, with only 3.5% of the population migrating outside the Hanyama district. Natural regulation may hold the key to managing sika deer populations in Japan.
Researchers analyzed Y chromosome sequences of modern Japanese men to estimate ancient human population size around 2,500 years ago. The study revealed a significant decrease in ancestral Jomon DNA before the arrival of the Yayoi people, supporting an actual population decline.
The Asian longhorned tick population has grown dramatically across Staten Island, with researchers finding the species in 7 of 13 parks surveyed in 2017 and 16 of 32 in 2018. The ticks can clone themselves in large numbers and are likely to continue spreading throughout the city.
A recent study by Elephants Without Borders and the University of Massachusetts Amherst reports that Angola's elephant population has declined by 21% since 2015. The researchers highlight the need for active protection measures, such as anti-poaching laws and habitat conservation, to prevent further decline.
The University of Guelph researchers have developed a dynamic population model that predicts overall cat numbers in a community, accounting for owned cats, unowned strays, and shelter cats. This tool enables municipalities to tackle factors influencing cat populations and improve cat welfare.
A study published in PLOS ONE found that Zimbabwe's Savé Valley lion population has low genetic diversity due to inbreeding, which could impact its health. The authors suggest introducing new unrelated lions to enhance the population's genetic diversity and ensure its long-term future.
Researchers mapped 27 types of illegal activities in Brazilian protected areas, with vegetation suppression and hunting being the most common. Human population density and accessibility were key factors influencing these activities, highlighting the need for targeted conservation efforts.
A new study reveals Easter Island's maximum population size could have reached 17,500 people, supported by the island's agricultural potential. The research, published in Frontiers in Ecology and Evolution, aims to unravel the mystery of the giant statues and population crash.
A recent study by Louisiana State University researchers found that urban development has declined in coastal flood zones nationwide, but grown in inland counties. This trend poses a significant risk to populations living in inland flood zones, who may not be aware of the hazards despite migrating to coastal areas.
A study by San Diego State University researchers found that only a small percentage of the Silver River macaque population's diet comes from human-provided food, with most relying on environmental sources. Human-monkey interactions were also largely benign, with concerns about disease transmission appearing to be overblown.
A team of international researchers has found abundant wildlife populations at Chernobyl, including moose, roe deer, wild boar, and wolves, contrary to previous studies showing significant radiation effects and reduced populations.
Scientists at NTU and Penn State University have discovered one of modern human's ancient lineages by sequencing the genome of five living individuals from a hunter/gatherer tribe in Southern Africa. The study found that these individuals are genetically distinct from Europeans, Asians, and all other Africans.
A new study published in the Proceedings of the National Academy of Sciences found that even stringent fertility restrictions or catastrophic mass mortality would not significantly reduce the world population by 2100. Instead, researchers suggest focusing on policies and technologies that reverse rising consumption of natural resources...
A new theorem provides a fundamental approach to estimate the age structure of any population, from fruit flies to humans. This discovery can be applied to predict rates of infectious diseases and anticipate healthcare needs. By understanding age distribution, researchers can better comprehend risks and make informed decisions.
A new framework by Aaron Stutz reveals that the human population explosion was rooted in ancient political and economic organization, with a tipping point around 1,500 years ago. This insight offers a fresh perspective on modern-day population dynamics and potential consequences for society.
A study published in The BMJ found a significant increase in births in Catalonia nine months after FC Barcelona won three major football trophies. Births rose by 16% in February 2010, with some areas experiencing even higher increases, although the findings fall short of earlier media reports.
New research from Ohio State University predicts that the growing human population will lead to an increase of 10.8% more threatened species by 2050. The study suggests that meaningful biodiversity conservation efforts must take into account the expanding human population footprint, which can exacerbate extinction threats.
A recent study has identified more than 40 genetic regions influencing fertility in Hutterite men, which may shed light on unexplained cases of male infertility. The research also found nine genetic regions impacting sperm quality in non-Hutterites.
Researchers have created a global map suggesting climate change will disproportionately affect the world's poorest regions. The study forecasts potential changes in local populations for 2050, predicting that those living in hot, low-latitude areas such as Africa and South America will be most vulnerable to climate-related challenges.
The world's population will grow to 8.9 billion by 2050, with slower growth in richer countries and more urbanization in underdeveloped nations. The average population density is expected to rise from 45 people per square kilometer to 66 people per square kilometer.
Researchers find that human population growth is slowing due to increased birth rates being offset by negative feedback from crowding and resource depletion. The world population is expected to reach 10-12 billion around 2100, despite a near doubling in numbers.
A study analyzing Ontario data found that immigration officials' referrals and region of origin are key determinants of tuberculosis risk. Immigrants from Vietnam had the highest incidence rate, emphasizing the importance of targeted prevention efforts to protect both migrant populations and native Canadians.
Patients awaiting coronary artery bypass grafting (CABG) in Ontario face higher mortality risk compared to the general population. However, a new study found that those on the waitlist may actually have similar or decreased vital risk when compared to patients living with coronary artery disease.
A study by University of Michigan researchers found that living in segregated cities with high levels of poverty is associated with higher mortality rates, particularly for cancer. The analysis revealed a strong correlation between segregation and increased susceptibility to illness and death among both black and white populations.
Researchers find limited flow of male genes between subpopulations in India due to historically prevalent marriage system. However, they observe certain trends of haplotype sharing between upper and lower castes, suggesting rare conduits for male genes across social ranks.
Researchers found that African elephants can coexist with humans for a certain threshold, beyond which they disappear. The 'threshold hypothesis' suggests that land planners can distinguish areas suitable for elephant conservation from those that are not.
Researchers Joel Berger and Steven Cain found that the length of bison birthing periods is not longer in brucellosis-exposed populations. This allows ranchers to predict when it's safe to put cattle on public lands where bison live, typically delaying until July.
A new University of North Carolina at Chapel Hill study found that intensive hog operations are disproportionately located in poor and non-white communities across North Carolina. The research, funded by the National Institute of Environmental Health Sciences' Environmental Justice Program, analyzed data from 1998 and 1990 to show that...
Conservation efforts have led to a resurgence of the Greater Prairie Chicken population in Illinois, with numbers increasing from just six resident males to over 500 birds. The success is attributed to an experimental program that imported birds from healthy populations elsewhere, addressing genetic diversity and habitat loss issues.
A new census of mountain gorillas in Uganda's Impenetrable Forest has yielded 292 individual gorillas from 28 groups, with the help of survey techniques developed in the Virunga Conservation Area. The results will inform a regional plan of action to conserve these endangered populations.
The report examines residents' fears about wolf interactions with livestock, humans, and the native deer population. Despite these concerns, states with wolves have minimal livestock losses, highlighting a more nuanced understanding of wolf ecology.
A genetic analysis by University of Illinois researchers reveals that Illinois Prairie Chickens have lost significant genetic diversity due to population decline, affecting their fitness. The study suggests introducing birds from neighboring states may help restore the species' numbers and health.