Articles tagged with Natural Selection
A comprehensive review of 280 scientific studies reveals that natural selection can occur on multiple levels of biological organization, including individual and group benefits. This finding challenges the traditional view of natural selection and highlights its complexity in various ecosystems.
A University of Rhode Island professor studied natural selection in Anolis lizards impacted by hurricanes, finding longer limbs and larger toepads increase survival rates. This study confirms hurricanes as a source of episodic natural selection with lasting evolutionary effects.
Researchers discovered that three-legged lizards can survive by adapting their gait and using abundant food sources, highlighting the limitations of Darwin's natural selection theory. The study found less than 1% of wild lizards have a limb deficit, with nearly half being Caribbean anoles.
Researchers at Stanford University tracked the evolution of fruit fly populations in response to pesticide exposure, finding that resistance alleles persist through a mechanism known as 'dominance reversal.' This process allows alleles to function as either dominant or recessive depending on environmental conditions, maintaining geneti...
Despite using a large genetic dataset, scientists were unable to find a definitive explanation for the formation of distinct great white shark populations in the southern Indo-Pacific Ocean. A study published in Proceedings of the National Academy of Sciences suggests that genetic divergence began around 7,000 years ago.
Researchers highlight the risks of bypassing natural selection in assisted reproductive technologies (ART), which can lead to deleterious epigenetic changes and increased health problems. They propose applying evolutionary principles to ART protocols to improve outcomes for human ART and animal production.
A new study suggests that coral heat tolerance adaptation via natural selection may be insufficient to overcome the impacts of ocean warming, unless Paris Agreement commitments are realized.
Researchers used ancient DNA to uncover novel signatures of adaptation in early Europeans, tracing genetic changes in response to lifestyle shifts. The study identified 14 regions of the genome that underwent significant natural selection, including traits related to vitamin D production and dairy digestion.
Researchers studied an isolated population of sparrows on Lundy Island and found that older birds tend to have fewer friends, similar to humans. The study suggests that there is no 'evolutionary pressure' to maintain social connections in older age, leading to a decline in friendships.
A new study using a mammal model suggests that fitness loss through spontaneous mutations will not significantly affect human populations. The research indicates that even without natural selection, the rate of fitness decline is not a cause for concern, providing reassurance about human viability in the near future.
A new model reveals that cooperative behaviour between species may break down when conditions are ripe for mutual benefit. Researchers found that as cooperation becomes easier, it can unexpectedly disappear, with asymmetric clusters forming and interacting across lattices.
A modeling study suggests that one-sided interspecies cooperation can emerge and persist over time, with only one species benefiting. The authors use evolutionary game theory and the prisoner's dilemma to model this phenomenon, finding that natural selection may favor asymmetric states where one species exploits another.
A study sequenced the genomes of nearly 300 rabbits to understand their colonization success. Researchers found that domestication-linked genes are often eliminated in feral populations due to natural selection, leading to a mix of domestic and wild origin. This helps explain how domestic animals can thrive in the wild.
Researchers at Texas A&M University uncovered how domestic rabbits become feral in the wild through natural selection. They found that all European, South American, and Oceania rabbits had a mix of feral and domestic DNA, explaining why they quickly adapted to living in the wild.
A Penn State-led study found that female giraffes have proportionally longer necks than males, suggesting high nutritional needs drove the evolution of this trait. Giraffes adapt to reach leaves in trees by using their long necks, allowing females to access food with increasing demands as they mature.
A University of Turku study found that maternal grandmother investment improves grandchildren's well-being, particularly after facing adversities. This support can have lasting effects into adulthood, reducing risks of premature death and lower likelihood of having children.
A researcher at West Virginia University is using 'reverse engineering' to study the structural characteristics of slot machines and their impact on players. The study aims to understand what makes these games immersive and how they interact with individual vulnerabilities, ultimately informing the development of safer gambling products.
A Mediterranean marine worm has evolved massive eyes, rivaling those of mammals, to see in the dark. The worms use their exceptional vision to detect bioluminescent signals and may have a secret language through light communication.
Researchers found that aging can accelerate evolution, favoring faster adaptation to changing worlds. This means senescence becomes an advantageous characteristic under natural selection.
Research on Betula ermanii saplings reveals two distinct mechanisms contributing to poor growth: adaptation to extreme environments and genetic drift leading to inbreeding. Populations at the edge of their distribution range are susceptible to these effects, highlighting the need for conservation measures
Researchers studied over 100 noctilionoid bat species, finding that different dietary types drove modifications in tooth number, size, shape, and position. For instance, fruit-eating bats have shorter jaws with reduced middle premolars, while nectar-feeders have longer jaws with room for more teeth.
A new study by James Stroud at Georgia Tech and Jonathan Losos at Washington University in St. Louis found that natural selection varies massively through time among four different species of anoles living together on a small island. Despite this variation, the species remained remarkably similar across the entire time period.
A long-term study by Georgia Tech's James Stroud found that natural selection varies massively through time, canceling out any stabilizing effect. Species remained remarkably similar across the entire three-year period, contradicting the idea of constant evolution.
Researchers found that fork-tailed drongos use unique egg 'signatures' to identify cuckoo eggs, rejecting 93.7% of 'forgeries'. This defence mechanism may help explain why African cuckoos remain common in Africa despite high mortality rates among young birds.
A recent study published in PNAS found that global cooling is the major driving factor behind the diversification of terrestrial orchid species. The research analyzed over 1,500 species and discovered that most new species emerged within the last 10 million years, coinciding with global cooling trends.
A study by the Netherlands Institute of Ecology found that great tits are struggling to adapt their breeding timing to cope with climate change, leading to a decline in population numbers. The researchers used innovative methods to speed up evolution and predict the impact of climate change on natural selection.
Researchers found that a large genetic region responsible for immune responses showed rapid evolution and more Mesolithic hunter-gatherer ancestry, suggesting that genetic variants already present in Europe were passed down preferentially. This suggests that diversity in immune genes may be just as important as adaptation to lifestyle.
A recent study by the University at Buffalo has discovered that genetic variations affecting immunity and metabolism have been preserved in humans for millions of years. This finding supports the theory of balancing selection, which suggests that certain genetic traits can be beneficial or harmful depending on environmental conditions.
A survey of 5,500 Brazilian and Italian students aged 14-16 found that nationality, social perceptions of science, and household income were more influential than religion in rejecting evolutionary theory. The study published in PLOS ONE reveals a significant gap in understanding geological time between Italian and Brazilian Catholics.
A new study at the University of Tokyo has mapped the evolution and process of natural selection in Escherichia coli bacteria, creating fitness landscapes that help understand drug resistance and potential treatments. The researchers hope their results will be useful for predicting and controlling E. coli and other bacteria.
A new study published in Collective Intelligence journal suggests that evolutionary forces may be fueling collective tendencies to discriminate. The research recommends fostering environments where desired behavior emerges naturally through evolutionary dynamics rather than regulating against undesired outcomes.
Researchers have discovered a family of selfish genes, wtf, that have survived for over 100 million years in yeast, contradicting established beliefs on their longevity. These 'killer meiotic drivers' transmit themselves to half of offspring and destroy reproductive cells without being suppressed by natural selection.
Genomic data reveals two distinct species of scrub jays: A. sumichrasti, endemic to southern Mexico, and A. texana, found only in Texas. The study's findings support the recognition of these new species based on phenotypic, behavioral, and genetic differences.
Researchers have discovered a selfish genetic element, known as Segregation Distorter (SD), that skews genetic inheritance. SD has caused dramatic changes in chromosome organization and genetic diversity, leading to the accumulation of deleterious mutations.
Researchers found that dogs derive ancestry from at least two separate wolf populations, an eastern source and a more westerly source. The study, published in Nature, analyzed 72 ancient wolf genomes spanning the last 100,000 years and suggests that domestication occurred in multiple places.
Male scorpionflies from two locations in Japan use varying mating tactics, with those from Okayama employing 'sneaking' to successfully mate. The study suggests that environmental factors and genetic components influence alternative mating habits.
A new study examines mathematical models designed to draw inferences about how evolution operates at the level of populations of organisms. The researchers conclude that such models must be constructed with care, avoiding unwarranted initial assumptions and weighing existing knowledge.
A new study has discovered that the raw material for evolution is much more abundant in wild animals than previously believed. Researchers found that many populations of birds and mammals can evolve surprisingly fast, with their genetic difference in survival and reproduction being two to four times higher than previously thought.
Scientists have developed a new computational tool that mimics the processes of natural selection, producing proteins for medicinal and household uses. This innovation reduces the time required for laboratory evolution from months or years to just days.
A study from Washington University in St. Louis found that birds with bigger brains relative to their bodies reduced their body size by only about one-third compared to smaller-brained birds. This suggests that cognitive power may play a role in helping certain species adapt to climate change.
Research on hybrid threespine stickleback fish found that genetic signatures of hybrid incompatibilities are environment-dependent. Fish raised in ponds had a lower incidence of mismatched genes due to ecological pressures, whereas lab-reared fish showed no difference in heterozygosity.
A recent study found that most vocal learners, such as dolphins and whales, sound higher than expected based on their body size, not lower. This challenges the idea that faking body size is linked to vocal learning and suggests a different evolutionary scenario for vocal communication in mammals.
Researchers from Washington University in St. Louis uncovered why hybridization among brown anoles is rare in their native range but common in new geographic territories. The study highlights the importance of environmental degradation in facilitating hybridization, which can contribute to biodiversity declines.
A study by University of Utah biologists discovered a mutation in the ROR2 gene is linked to short beak length in domestic pigeons. This mutation also underlies the human disorder Robinow syndrome, which shares striking facial features with the pigeon phenotype.
Despite 10,000 years of inbreeding, the kākāpō genome sequencing reveals that the species has lost potentially deleterious mutations and now carries fewer harmful mutations than extinct mainland populations. This finding suggests that natural selection may have facilitated genetic purging in small populations.
A new study by the University of Sussex reveals that natural selection leads to fluctuations in nectar supply and demand due to changes in pollinator populations. When pollinators are scarce, flowers produce more nectar to outcompete others, but when they're abundant, less nectar is needed.
Researchers found that certain personality types excel in specific countries and years due to environmental factors like predator presence and beechmast availability. This suggests that spatial and temporal variation in selection promotes the maintenance of behavioral differences within species.
A study on unrelated lizard species demonstrates how natural selection leads to similar communication strategies for defense and mating. The Anolis and Draco lizards have evolved identical displays, adapting to varying environmental conditions, showcasing convergent evolution's power.
A genomic study of 194,000 females and 167,000 males in the UK Biobank finds no correlation between farming and reduced sex differences in size and shape. Genetic variations linked to physical traits show no significant increase in either males or females over the past 3,000 years.
Researchers found that Tasmanian devils' genome has undergone widespread evolution in response to transmissible cancer, but distinct sets of genes are involved at different timescales. The study suggests that conservation efforts should focus on maintaining genetic diversity across a wide set of functionally important genes.
Researchers from McGill University studied threespine stickleback fish adapting to seasonal changes, finding genetic shifts that mirror past adaptations. The study's findings suggest predicting evolutionary future of populations under environmental stressors like climate change.
Dr. Owen Gilbert introduces a novel concept in evolutionary theory, suggesting that natural reward acts synergistically with natural selection to drive the innovativeness of life over time. This framework offers new perspectives on long-standing biological mysteries and has been justified by existing data.
A recent study found that strong selection pressure enhances evolvability more effectively than weak selection, allowing populations to evolve new traits. This discovery challenges previous assumptions about the relationship between selection on fitness and robustness.
A recent study has identified genetic variants associated with reproductive success, which may provide insights into the biology of fertility and infertility. The research found that diverse biological mechanisms contribute to reproductive success, implicating both neuroendocrine and behavioral influences.
Researchers finally resolved the identity of the mysterious butterfly, previously described by Alfred Russel Wallace in 1866. The species, known as 'Grass Blue', demonstrates high seasonal variability and may not warrant subspecies classification.
Researchers used ancestral sequencing to study the translational machinery in bacteria, finding that evolution prioritizes fixing problems over completing them. The team discovered that natural selection favors mutations with the largest fitness advantage, leading to a myopic approach that neglects other cellular modules.
Researchers identified a strong bias towards U residues in SARS-CoV-2 mutations, suggesting a defense mechanism to degrade the virus. Natural selection allows the virus to adapt, but mutational processes may be hindered by human proteins.
Researchers analyzed data from solo skippers in the Mini Transat La Boulangère regatta to identify effective sleep management strategies. Over half of the skippers employed sleep extension, polyphasic sleep, or gradual sleep deprivation to optimize their performance and safety during the competition.
Researchers found that urban lizards can maintain function at temperatures 0.82 degrees C higher than forest counterparts. This heat tolerance allows them to thrive in urban environments, where temperatures often exceed 40 C.
Researchers found that natural selection acts on signal-sensing receptors, influencing a worm's decision to stay or enter dauer based on the availability of resources. The study provides evidence that artificial and natural selection work similarly, supporting Darwin's hypothesis.