Articles tagged with Eggs
Researchers found that turtle embryos can move around to find optimal temperatures, influencing their own sex determination. This behavior may help turtles buffer the effects of climate change by producing a balanced sex ratio.
A new study reveals that American robins have a preference for using one eye over the other when looking at decoy eggs, with those who exhibit this bias being more successful at ejecting foreign eggs. This specialized ability is thought to be an adaptation to avoid brood parasites.
U of Guelph researchers found that alligators' hearts become bigger and stronger when exposed to low oxygen during early development, unlike many other animals. This discovery has significant potential to benefit humans, particularly those with weakened hearts.
Researchers have identified a single gene variation responsible for non-male-producing (NMP) trait in Daphnia, a type of planktonic crustacean. The discovery sheds new light on the species' unique reproductive strategies and could lead to innovations in fertility treatment or pest management.
A new study by Flinders University and the University of Melbourne found that artificial light pollution can prevent clownfish eggs from hatching. The presence of artificial light at night (ALAN) masks natural cues, leading to a zero success rate for test eggs incubated in its presence.
Researchers found that environmental stressors can influence phenotypes of offspring and even be passed down to future generations. The study discovered a specific brain region involved in the inheritance of ethanol preference behavior, which was observed for five generations in fruit flies.
Researchers have discovered a new species of egg-sucking sea slug, Olea hensoni, in Florida's Cedar Key. This unique slug belongs to the sacoglossans group and has been found to prey on eggs of fellow slugs and snails. The discovery highlights the vast marine life remaining to be discovered, even in well-studied areas.
A recent study by LMU biologists found that personality differences among great tits affect their breeding timing. The more daring birds breed later but earlier when threatened, while less valiant pairs delay breeding until the threat passes.
Researchers at the University of Michigan developed a method to improve ovarian follicle development, increasing survival rates from less than 5% to 42-86%. The approach uses adipose-derived stem cells in a 3D scaffold to mimic the ovary environment.
In a groundbreaking study, scientists at the University of Sydney observed a normally live-bearing Australian lizard lay eggs and then weeks later, give birth to a live baby from the same pregnancy. This unusual reproductive trait is known as bimodality, where some individuals lay eggs while others give birth to live young.
A recent study published in The FASEB Journal found that low oxygen levels during fetal development can lead to premature ovarian ageing and reduced egg availability. Researchers exposed pregnant rats to chronic hypoxia, leading to accelerated ageing of the ovaries and fewer eggs available for future reproduction.
New research suggests climate change could devastate painted turtle populations as temperature fluctuations disrupt the sex ratio, potentially leading to population collapse. The study found that warmer temperatures combined with stronger thermal fluctuations increase the risk of drastic shifts in demographics, ultimately threatening t...
A non-native species of wasp, the samurai wasp, has been identified in British Columbia, Canada, prior to formal approval for its introduction. The wasp is a natural parasitoid of the brown marmorated stink bug, a globally spreading agricultural pest native to Asia.
Researchers at the University of Nottingham discovered fertilized eggs inside a female stickleback fish named Mary, who was found to have internal fertilization and developed embryos without laying eggs. The team successfully delivered 54 nearly complete embryos via Caesarean section, with most offspring growing to adulthood.
Researchers found four different types of eggs from birds, lizards, and crocodiles, suggesting a shared nesting site. This discovery provides evidence of an ancient ecological strategy where animals co-habited and safely incubated their eggs together.
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.
Researchers found that fruit fly mothers incorporate sex pheromones into the eggshell's wax layer to mask its identity from larvae, preventing cannibalism. This nontoxic chemical deception strategy has implications for our understanding of animal behavior and defense mechanisms in diverse species.
Researchers at the University of Arizona have discovered a protein in mosquitoes that prevents them from hatching. By blocking this protein, females can no longer produce viable eggs, leading to the death of embryos. This discovery could lead to the development of new drugs as birth control for mosquito populations.
Researchers identified a mosquito-specific protein, EOF1, which plays a crucial role in eggshell formation. Blocking its expression resulted in non-viable eggs and multiple structural defects. This discovery provides a promising target for developing more effective and safer mosquito control strategies.
A new study found that eating one egg per day is associated with a blood metabolite profile linked to a lower risk of type 2 diabetes. Researchers identified several biochemical compounds in blood that predicted a higher risk of developing the disease, including tyrosine.
Fossilized newborns and egg shells found together in 130-million-year-old Lebanese amber provide the first direct evidence of how tiny insects hatched in deep time. The discovery sheds light on the evolution of the hatching mechanism used by modern green lacewings.
Male smooth guardian frogs of Borneo display extended parental care, staying with eggs for 11 days and transporting tadpoles through the forest. The males' selection of artificial pools is influenced by terrain steepness and presence of predators, indicating a unique strategy in frog parenting.
The study warns that a temperature increase of over 1.5°C will cause dramatic worsening in the survival chances of offspring for important fish species, including Atlantic cod and polar cod. This could lead to a significant loss of breeding grounds and population decline, with severe consequences for Arctic seals and seabirds.
A liquid nitrogen storage tank failure at a fertility center resulted in the loss of over 4,000 frozen eggs and embryos. Researchers argue that a ruling in favor of a couple's wrongful death lawsuit could lead to limits on abortion, stem cell research, and IVF.
A new study published in Human Fertility found that single women who freeze their eggs for non-medical reasons are trying to avoid 'panic parenting.' The research also highlights the need for clearer information about the likelihood of having a baby with these eggs. Many participants reported feeling emotionally difficult and unsupport...
In a study on Japanese great tits, researchers found that females became more promiscuous after failed breeding attempts, increasing the rate of extra-pair paternity by 40% in subsequent breeding attempts. This flexible behavior is thought to be an adaptive strategy to improve reproductive success.
Researchers from the University of Bristol have developed autonomous sensor pods called 'dragon eggs' that can withstand harsh conditions around active volcanoes, providing valuable real-time data on volcanic activity. The innovative technology has numerous applications, including remote monitoring of glaciers and geological faults.
A new phase has been proposed in the relationship between figs and wasps, revealing a sixth developmental cycle where insects other than wasps can insert their eggs into figs. This finding highlights the complex mutualism between figs and wasps, which have evolved over 65 million years.
A new study by University of Illinois researchers found that the conical shape of murre eggs makes them more stable on cliffside ledges. Increasing the egg's conicality reduced its tendency to roll off the surface, providing experimental support for natural selection shaping the unique form of murre eggs.
A study of almost 83,000 IVF patients found that women who produce 15 or more eggs benefit from frozen embryo transfers, while those producing fewer eggs see better results with fresh transfers. This challenges the long-held 'freeze-all' approach.
Research found that bigger eggs are advantageous in rainy weather, while smaller eggs are better suited for hot temperatures. House sparrows compensate for variable egg sizes by laying varying egg sizes within the same clutch.
Scientists at the University of Wisconsin-Madison found two genes, IRX3 and IRX5, that work together to construct a cellular communication system in mouse ovaries. This system, involving junctions between eggs and granulosa cells, helps ensure proper egg development and survival leading up to ovulation.
Researchers found that jumping genes use nurse cells to produce virus-like particles, which then integrate into the genome of developing egg cells. This process can lead to genetic disorders and cancer. The study provides new insights into how parasitic genetic elements manipulate their environment to drive evolutionary change.
Researchers found that roundworms create oocytes with two nuclei but destroy them through apoptosis, recycling mitochondrial material into new eggs. This process helps understand why animals target so many cells for destruction during egg formation.
Researchers at UC Riverside are exploring a hormone-targeting approach to control mosquito reproduction, which is linked to blood feeding. The goal is to develop innovative vector control methods and potentially reduce the spread of diseases transmitted by mosquitoes.
Researchers have discovered that chemicals used in flame retardants can be broken down into more toxic compounds in birds, including bald eagles. The study found that these metabolites can accumulate in the eggs of bald eagles, potentially affecting their reproduction and overall health.
A randomized trial tested the effectiveness of energizing eggs with a patient's own mitochondria in assisted reproduction. The procedure was found to have no impact on pregnancy or live birth rates, contradicting previous claims. The study suggests that the technique is not beneficial for patients with a poor prognosis for success.
A study on 563 women who froze their eggs between 2009 and 2017 found that only 12.8% returned to the clinic for reproduction treatment, with an overall success rate of 32.6%. The majority of returning social freezers had found a suitable partner to pursue motherhood.
Since the world's first test-tube baby was born in 1978, over 8 million babies have been conceived through IVF, with a record 157,449 babies born in Europe in 2015. European pregnancy rates for IVF and ICSI have stabilized at around 36%, while egg donation treatments have seen significant rises, with pregnancy rates now at about 50%.
A study of 150 women who froze their eggs found that partnership problems were the primary motivation for freezing eggs, not career planning. The majority of women in the study were single or had unstable relationships, and many had completed their education and career goals but still struggled to find a partner.
Researchers have successfully replicated ovarian tumors inside chicken eggs, paving the way for patient-centred cancer treatment. The 'chicken egg tumour model' allows for rapid testing of anti-cancer drugs tailored to each patient's needs.
Researchers found that between 5-20% of stick insect eggs were excreted unharmed after being fed to a bird species. The study suggests that this process could contribute to the dispersal of stick insects across different habitats, similar to how plants use animals for seed distribution.
A study by UC San Francisco found that one in six women who underwent elective egg freezing experienced regret, despite being empowered by the procedure. Women with lower egg yields and inadequate information about the process were more likely to express regret.
Researchers at Duke University and Zhejiang Wanli University identified a key gene called Kdm6b that affects how genes are expressed in turtles, determining their sex. The study found that cooler egg incubation temperatures activate the Kdm6b gene, leading to testes development and producing males.
A new report in Science shows that larger females invest disproportionately more in the number of eggs and size of individual eggs. This finding is critical for fisheries management, suggesting a focus on reducing fishing pressure on large fish rather than small ones.
The cuckoo catfish has evolved a clever method to smuggle its eggs into cichlids' nests, exploiting their brood care behavior. Cichlids from Lake Tanganyika have learned to defend themselves against the parasite's trick, but those without 'evolutionary experience' are vulnerable to its strategy.
A total of 43 known cuckoo bees have been identified in North America, with 15 new species discovered by York University PhD Candidate Thomas Onuferko. The newly described species possess distinctive patterns and are difficult to distinguish from other bees.
Researchers found that zinc deficiency can negatively affect egg cell division, viability, and quality, which could impact fertility. The study suggests that micronutrient availability during oocyte maturation is critical for successful fertilization.
Scientists discovered a hundred pink, dinner-plate-sized octopuses huddled around cracks in the rocks, guarding their eggs in warm water. The find suggests a better, healthier habitat nearby, potentially supporting an even larger population.
A recent study published in Science Advances has analyzed the nanostructure of chicken eggshells to better understand their role in embryo development. The findings suggest that specific characteristics of the eggshell could be genetically selected to produce healthier, more robust eggs.
Researchers at McGill University Health Centre found that the egg sends signals to surrounding cells to construct and multiply feeding tubes, a dynamic process essential for growth. This discovery highlights the egg's sophisticated communication skills and its active role in creating the microenvironment it needs to develop.
Researchers at McGill University have discovered a unique nanostructure in chicken eggshells that contributes to their strength and fragility. The findings, published in Science Advances, could lead to improved food safety by enabling the selection of genetic traits in laying hens that produce consistently stronger eggs.
Researchers found that whipworms have their own distinct gut flora, which helps them survive by reducing new egg hatching. This discovery could lead to more effective drug treatments for whipworm infections, which cause debilitating symptoms and are difficult to treat.
A recent study found that female southern African pythons incubate eggs and care for their babies for about two weeks after hatching. During this time, the mother's body temperature increases significantly, and she loses up to 40% of her body mass.
Researchers at Osaka City University have developed a method to harness the potential of egg whites as a substrate for producing carbon-free hydrogen. This involves using a photocatalyst to speed up the reaction and manipulating molecular components through cooperative immobilization.
Researchers discovered that deep-sea skates are using hydrothermal vents to incubate their eggs, reducing the typical four-year-long incubation time. The unique behavior allows the fish to thrive in extreme conditions, providing new insights into conservation strategies for this poorly understood species.
Scientists have successfully grown human eggs in a laboratory from their earliest stage to full maturity, paving the way for improved fertility treatments. The advance aims to safeguard the fertility of girls with cancer ahead of potentially harmful medical treatment.
In a groundbreaking study, male white-spotted bush frogs have been found to dedicatedly guard their fertilized eggs from other male frogs and predators. This unique parental care behavior significantly enhances offspring survival rates, with up to 70% of 'fatherless' egg clutches perishing.
A protein called ZFP36L2 is essential for eggs to complete normal development and fertility. Female mice lacking this protein in their eggs are infertile due to a failure in global transcriptional silencing.
Researchers created a fluid material with orderly condensed egg white proteins, which gelled upon heating and exhibited high mechanical properties. The resulting hydrogel showed a compressive fracture strength 150-fold higher than traditional boiled egg white.