Articles tagged with Wild Populations
Researchers found that prior exposure to powdery mildew makes plants more susceptible to subsequent disease. In experiments and in the wild, early infection facilitated later infection, with some pathogen strains promoting infections from later-arriving strains. The findings highlight the importance of understanding interactions among ...
A study led by Virginia Tech researchers explores the effects of mobile phones on Maasai women's lives, revealing that technology both empowers and hinders gender dynamics. The findings highlight the importance of understanding context-specific empowerment in rural communities.
Alaska's chinook salmon populations are declining due to climate-driven changes in their freshwater habitats. Productivity decreased when stream temperatures rose above 64 degrees Fahrenheit, and heavy rains led to lower spawn production.
Research by the University of Göttingen found that wild bees depend on landscape structure, with small fields and organic areas providing benefits for bumblebee colonies. Flower strips in conventional cereal fields also attract pollinators, highlighting the importance of agri-environmental schemes that consider landscape structure.
Researchers correlated poisoned red kites with local extinction and declining breeding populations in Spain between 1994-2014. Wildlife poisoning from pesticides and lead ammunition may contribute to species declines across the country.
Exposure to wildfire smoke affects the body's respiratory and cardiovascular systems almost immediately, according to a UBC study. The researchers found that even within one hour of exposure, ambulance dispatches related to respiratory and cardiovascular conditions increased.
A recent NTNU study on wild boars in France reveals that rapid growth and early maturity may not come at a cost. In fact, faster-growing males had lower mortality rates due to hunting and natural causes, while females showed no significant impact from early reproduction.
A genetic analysis of brook trout in Loyalsock Creek drainage reveals that fish are moving between tributaries, using the mainstem as a seasonal corridor. This finding contradicts previous research and suggests that conservation efforts should focus on larger streams and rivers to protect critical movement corridors.
A new study finds that certain stream pools act as drought refuges for salmon, providing conditions necessary to support survival during extreme conditions. The research provides insight into the role of habitat fragmentation in threatening salmon survival and informs strategies for conservation efforts.
A recent study using lidar technology reveals that mosquitoes are most active during morning and evening hours in Tanzania, with males being 87 times more active than usual. This finding suggests that light levels affect mosquito behavior, creating opportunities for developing light-based measures to prevent malaria.
A study warns that water frog populations in Turkey's Ceyhan and Seyhan deltas are declining by 20% annually, threatening regional extinction by 2050. The authors recommend banning wild frog harvesting and encouraging sustainable frog farming to alleviate pressure on wild populations.
Scientists at Imperial College London used gene drive technology to create an all-male population of malaria-carrying mosquitoes, leading to a total collapse in the population. The modified mosquitoes produce more male offspring, causing females to be born and eventually leading to no females being present.
The EU is taking a cautious approach to gene drive organisms, considering their potential risks and benefits. The technology uses CRISPR/Cas-9 genome editing to introduce permanent changes in ecosystems, raising concerns about long-term ecological impact.
A new analysis of reef restoration projects in the Florida Keys National Marine Sanctuary found that staghorn coral colonies survived for two years after outplanting, but declined over time. Large numbers of colonies need to be outplanted to ensure long-term survival.
A new study reveals that female wild mammals live 18.6% longer than their male counterparts, contrary to the human lifespan difference of 7.8%. This phenomenon is likely due to differences in energy allocation and physiological characteristics between sexes.
A study examines the impact of sex on the lifespan and aging rate of mammals. Wild female mammals have an average 18.6% longer lifespan than their male counterparts in 60% of analyzed populations.
Researchers developed guidelines for giraffe translocations to ensure long-term population viability, including ideal group composition and decision-making processes. A founding population of 30 females and 3 males is recommended for initial translocations, while larger groups can be used to maintain genetic diversity.
Researchers found that harvest slots can outperform classic minimum-length limits in maximizing kilogram yields while protecting large spawning fish and maintaining ecosystem diversity. This approach stabilizes population dynamics without causing loss in yields, increasing the average size of catch fish.
A Simon Fraser University-led study predicts that climate-driven glacier retreat will challenge some salmon populations, while creating new habitats in others. As glaciers lose up to 80% of their ice volume by 2100, southern watersheds may face low water flows and warmer temperatures, posing challenges for adult and young salmon.
Genomic analysis confirms two distinct phylogenetic species in red pandas, with different evolutionary histories and geographical distributions. The study highlights the importance of conservation efforts to protect this endangered species, including pedigree construction and interbreeding avoidance for captive individuals.
A study on wild bighorn sheep suggests that male offspring may lead to a faster decline in reproductive success and aging rates in mothers. Females that produced more male than female offspring early in life experienced reduced winter survival rates among their offspring, contributing to accelerated maternal aging.
Female marmot offspring born to older mothers exhibit greater annual and lifetime reproductive success compared to those born to younger mothers. In contrast, low-elevation environments exacerbate the decline in reproductive success of female offspring born to older mothers.
Researchers found that calf mortality at taming age differs from wild elephants and that calves with less experienced mothers are more likely to die. However, overall calf survival has massively improved over the decades, thanks to changes in management, such as daily veterinary care and access to natural habitats.
Researchers have discovered high levels of PFAS chemicals in the blood of Cape Fear River striped bass, which are associated with altered immune and liver functions. The study found elevated concentrations of PFOS and Nafion byproduct 2, particularly in smaller or younger fish, highlighting the unique properties of these chemicals.
Research reveals that domesticated wheat originated from the interbreeding of wild emmer wheat with cultivated varieties in southeast Turkey. This process occurred around 9,500 years ago, contradicting earlier theories of a single origin point.
Researchers discovered that peach-fronted conures can collaborate with invisible partners to solve a task, showcasing their sophisticated communication skills. The birds demonstrated unique approaches to the task, with one bird waiting for its partner's signal before picking up the string.
Sex-changing fish species can recover faster and more predictably than fixed-sex species when fishing is eliminated within Marine Protected Areas. This is because they can replace lost males with females, increasing reproduction rates.
A collaborative conservation approach involving government agencies, researchers, and nonprofits has led to a significant recovery of Nassau Grouper populations in the Cayman Islands. The population increased by nearly threefold over 10 years, with rapid growth due to an increase in new, younger fish joining the aggregation.
Researchers studied tool-sharing behaviors in wild chimpanzee populations, finding that mothers and females were more successful in acquiring tools. The study suggests a significant role for social learning in the context of complex tool use, potentially sharing an evolutionary origin with humans.
A study by Jan Ohlberger and colleagues found that orca predation contributes to more rapid growth, earlier maturation, and a 9% decrease in Chinook salmon body size. The impact is particularly pronounced on larger, older fish, highlighting the need for reconciling marine mammal conservation with management of Chinook salmon populations.
Killer whales prefer large, juicy Chinook salmon, leading to their decline due to overconsumption. The study found that resident orcas are likely the main driver behind the decline, as they increasingly target bigger fish.
Researchers used drones to estimate hippo numbers in the Okavango Delta, northern Botswana, and found the method to be just as effective as traditional land surveys. The drone's bird's-eye perspective allowed for accurate counting of individual hippos, even when they were crowded together.
Researchers found parrotfish populations surge in damaged reefs, consuming microalgae and cyanobacteria that provide food for the fish. This 'feedback loop' helps coral recover as reef health improves, with parrotfish numbers declining once ecosystems stabilize.
Researchers suggest forest farming as a solution to unsustainable wild collection of medicinal plants, which can lead to overharvesting and loss of ecosystems. Forest farming promotes better quality products, stable income for farmers, and increased transparency in the supply chain.
Researchers have found an effective and environmentally sustainable way to block the transmission of dengue virus using a new strain of Wolbachia bacteria. In trials carried out in Malaysia, the strain reduced cases of dengue by 40% and established itself even in hot temperatures.
Researchers analyzed over 65 years of records and data on hatchery-origin Chinook salmon in the Salish Sea, finding that larger fish are being released but still vulnerable to predators. The study suggests a narrow two-week window of release may lead to 'boom or bust' dynamics, affecting sustainability.
Researchers develop a method to create bio-inspired horns from horse tail hairs and silk, mimicking the structure and properties of real rhino horn. The goal is to undermine demand for endangered rhino horns and provide a cheaper alternative.
Threshold-dependent gene drives offer a potential solution to controlling the spread of gene drives in wild populations, increasing control and reducing the risk of unchecked spread. The authors discuss this concept in detail, highlighting its potential benefits and challenges.
Researchers found elevated selection and increased mutational burdens in wild emmer wheat under global warming, but also more beneficial mutations. Genetic responses vary by temperature and rainfall, with high temperatures associated with lower mutational burden and reduced selection.
Researchers at the University of British Columbia have discovered three new viruses in endangered Chinook and sockeye salmon populations. The viruses are related to those causing serious disease in other species and may play a role in population dynamics and aquaculture threats.
Researchers relocated sage-grouse from Oregon, Idaho, and Nevada to Washington state to boost populations. However, it took about a year for the birds to settle in and reproduce effectively. The study shows that relocation can be a viable tool in conserving threatened species like sage-grouse.
Researchers found high genetic diversity within and between baitfish assemblages from different locations around Bermuda. The study suggests that the island's baitfish species are highly mixed populations with limited gene flow to other regions.
Researchers studied two giraffe populations in Kenya to determine if human activity affects their social networks. High human activity was found to strengthen social bonds and create more exclusive groups among the giraffes.
Research reveals inbreeding depression significantly impacts Helmeted Honeyeater population, with the most inbred birds producing fewer offspring. Gene pool mixing is proposed as a solution to reduce harm caused by inbreeding.
Wild gibbons require extensive forest territory for each group, making them vulnerable to habitat loss. Their large home ranges are also a challenge for conservation efforts, as they squeeze into fragmented forests too small to accommodate multiple competing groups.
Researchers analyzed 25,000 tourist photographs to estimate population densities of five top predators in northern Botswana. The study found that tourist-contributed data can accomplish similar goals as traditional surveying approaches at a lower cost.
A new study published in Journal of Applied Ecology provides a method for verifying the effectiveness of marine protected areas (MPAs) by comparing data collected before and after their implementation. This approach helps scientists determine whether adjustments are needed to improve the impact of MPAs on fish populations.
Researchers at the University of Vermont discovered that viruses from domestic honeybees are spilling over to nearby wild bumblebee populations, primarily through shared flowers. The findings suggest that careful monitoring and treating of diseased honeybee colonies could protect wild bees from these viruses.
Researchers tracing the history of apples from wild origins to domestication reveal that ancient megafauna and Silk Road trade routes played key roles. The modern apple is a hybrid of at least four wild populations, with genetic material originating from the Tien Shan Mountains of Kazakhstan.
Scientists agree on the need to address wolf-dog hybridization but are divided on its management, threatening Europe's wolves. The study highlights the importance of educating people about the impact of free-roaming dogs and removing hybrids from small wild populations.
A rapidly expanding invasive species, wild pigs are threatening Canada's environment and agriculture. The species has spread across the country, from British Columbia to Ontario and Quebec, causing significant risks to farming and livestock production.
Researchers found that warmer water temperatures during early development increase the proportion of male southern flounder, with up to 94% in some cases. This could threaten wild populations and commercial fishing industries that rely on larger female flounder.
A team of scientists from Australia has shown that providing woody habitat in the Murray River significantly increases native fish populations. The study found a three-fold increase in Murray cod and doubling of golden perch abundance in restored areas compared to constant habitats.
Researchers found that PFASs, such as PFOS and PFNA, have high binding affinities to Baikal seal PPARα, suggesting a role in toxicity. In vitro and in silico approaches revealed interspecies differences in the binding of PFASs to PPARα.
A new study has found that increased human activity along the boundaries of the Serengeti-Mara ecosystem is having a detrimental impact on plants, animals, and soils. The study reveals how population growth and livestock in buffer zones are reducing available migration routes for wildebeest, zebras, and gazelles.
A nationwide investigation found no presence of the deadly fungus Batrachochytrium salamandrivorans (Bsal) in UK wild newt populations. To safeguard wild and captive amphibians, private owners are urged to enforce strict biosecurity measures.
Female spotted hyenas can increase their dominance rank by forming alliances with other females, ultimately improving their lifetime reproductive success. The offspring of these individuals inherit their mother's acquired rank, leading to a decline in individual rank within clans over time.
A recent study found that climate change is disrupting the complex systems underlying global fisheries, with 8% of fish populations experiencing significant negative impacts. The greatest losses in productivity were seen in regions such as the Sea of Japan and North Sea, while the Labrador-Newfoundland region saw significant gains.
A University of Southampton study reveals that salmon egg membranes adjust their structure to cope with reduced oxygen levels in rivers. This adaptation enables embryos to incubate successfully. The research found that membrane thickness, porosity, and permeability vary among different salmon populations.
A NUS study reveals that crossbreeding between milky storks and their cousins is threatening the species' conservation. The research found that more than half of the stork population in Singapore is genetically influenced by Painted Storks, posing a major threat to the species' survival.