Articles tagged with Eggs
Some frog species have moved to land to secure mating opportunities away from rival males. This strategy allows males to protect their genetic legacy, as found in tropical frog species that hide while breeding.
Researchers discovered that some frog species hide eggs on land to reduce competition from other males, leading to smaller testes in males with terrestrial reproductive modes. This finding sheds light on evolutionary forces driving diversity and provides insights for conservationists.
Researchers found that blue tit males feed their partners more frequently when they are younger and less experienced, but less often when temperatures rise. This helps the females forage for food without interrupting incubation.
Researchers found that commercial formulations of entomopathogenic fungus Metarhizium brunneum and Beauveria bassiana were effective in reducing house fly and stable fly egg-laying. The most effective product, Met52 EC, reduced oviposition by more than half and inhibited house fly development.
Researchers discovered that red-eyed treefrog embryos use a unique mechanism to escape deadly snakes, rapidly releasing enzyme-degrading substances from specialized glands on their snouts. This process allows the tiny escapees to wriggle through an aperture created in the egg membrane, ensuring survival.
Red-eyed treefrog embryos, thought to be helpless, are found to have evolved a quick-release mechanism to escape the egg prematurely. The study reveals that tadpoles can hatch up to two days ahead of schedule and use enzymes to create a hole in the egg membrane before escaping.
Bees that specialize on sunflower pollen have evolved to avoid a common brood-parasitic wasp, Sapyga, which is unable to develop on the pollen provisions of these bees. This study suggests that specialization on sunflower pollen confers anti-parasite benefits.
A 3-inch monogamous hermaphrodite fish has evolved a unique reproductive strategy, trading male and female roles to fertilize eggs equally. This behavioral study reveals that long-term partnerships among animals prioritize fairness and cooperation.
Researchers have discovered a new IVF-based technique that significantly reduces the risk of mitochondrial disease in babies. The 'early pronuclear transfer' method involves transplanting healthy mitochondria into an embryo created using conventional IVF.
Yale researchers have identified key molecular pathways involved in the aging of human eggs, which could lead to new treatments for age-related fertility issues. The study found that oxygen-deprived cells are a major cause of egg damage, leading to chromosomal abnormalities and reduced egg quality in women over 40.
A study of 1,421 Canadian children found that early introduction of allergenic foods decreases the risk of sensitization to these foods. Early introduction of eggs was especially beneficial, reducing the risk of sensitization to any of the three tested foods. The study suggests a shift in thinking from delayed food introduction to earl...
Researchers found that host birds only tolerate brood parasite eggs when threatened with retaliation by the parasitic birds. This 'mafia hypothesis' explains why some hosts accept parasitic eggs despite the risk of losing their own young.
Shiny Cowbirds have been spotted in Quito, Ecuador at an altitude of 2,800m, expanding the species' distribution range by approximately 500m. This finding suggests human disturbances like forest fragmentation and climate change may be prompting the birds to breed in higher altitudes.
Scientists discovered that the size of zinc sparks in human eggs is a direct measure of their quality and ability to develop into embryos. This breakthrough could lead to non-invasive and easily visible methods to assess egg health before implantation.
A low-cost, eco-friendly trap lures female mosquitoes to lay eggs in a specially designed 'ovillanta' made from recycled tires. The system has been shown to reduce virus-carrying mosquito populations by capturing and destroying their eggs.
Researchers discovered that small RNAs and the Argonaute enzyme work together to fine-tune egg composition, supporting embryonic development. The study found that varying small RNA levels can precisely control material production in eggs.
A study on Caenorhabditis elegans reveals that mothers who experienced normoxic conditions early on tend to provision their young with more glycogen, equipping the embryos with tools to survive oxygen deprivation. This adaptation leads to improved hatchability and survival rates in offspring.
New Cornell research reveals genetic cues from male mosquitoes affect female reproductive tract gene expression, influencing blood feeding, egg development, and immune defense. This study aims to develop novel strategies for controlling mosquito populations to fight diseases like Zika virus.
Research found parasitoid wasps can convert up to 90% of prey body mass into biomass, contradicting previous estimates of food chain lengths.
Researchers discover that mammalian egg cells acquire essential cellular components from their undifferentiated sister cells, called germ cells. This mechanism, previously only documented in lower animals, is believed to play a crucial role in the unique properties of eggs.
A new study by Stanford bioengineers and physicians finds that measuring the rigidity of an hour-old fertilized egg can predict its viability more accurately than current methods. The technique, published in Nature Communications, could improve the success rate of single-egg IVF and ultimately benefit both mothers and babies.
Researchers successfully revived and reproduced microscopic tardigrades that had been frozen for over 30 years. The animals demonstrated the ability to recover from long-term cryptobiosis and reproduce, shedding light on the mechanisms underlying their remarkable survival capabilities.
Researchers have discovered that epigenetic information in the egg plays a crucial role in shaping the development of the placenta during pregnancy. The study found that DNA methylation marks from the egg are essential for correct placental development, particularly in regulating cell adhesion and migration.
Researchers at the University of Cambridge found that reed warblers employ a 'neighbourhood watch' system to detect and eject cuckoo eggs, taking into account both personal and social cues. By combining information from close surveillance and neighbourly mobbing, warblers can assess levels of risk and protect their nests.
Researchers at Norwegian University of Science and Technology found that the blue egg color in cuckoos is inherited solely from the mother through mitochondrial DNA. This discovery challenges previous theories and highlights the importance of genetic inheritance in avian species.
Researchers have found that temperature-dependent sex determination (TSD) in American alligators is linked to the thermosensor protein TRPV4. The study shows that warm temperatures activate cell signaling, influencing gene expression and leading to partial feminization at male-producing temperatures.
The discovery of eggs with embryos preserved within the body of a 508-million-year-old Waptia fossil provides the oldest direct evidence of a creature caring for its offspring. This finding supports the theory that the presence of a bivalved carapace played a key role in the early evolution of brood care in arthropods.
Researchers studied the life cycle of Paracyphononyx scapulatus, a spider parasite that grows on a paralyzed host before killing it to feed. The study found that despite manipulating the host's behavior, the larva still killed its host and consumed it within 48 hours.
Researchers find that using kisspeptin instead of hCG during IVF treatment safely matures eggs and reduces the risk of ovarian hyper-stimulation syndrome (OHSS), even in high-risk patients. The average live birth rate was 45% across all doses, rising to 62% for women given the best performing dose.
Researchers discovered that a protective mechanism in egg cells prevents DNA-damaged eggs from being fertilized. This checkpoint helps prevent birth defects and miscarriages caused by damaged DNA. The study's findings offer new insights into the causes of infertility, birth defects, and spontaneous miscarriage.
Researchers have discovered that cell division mechanisms involve an excitable cortex that participates in the process. This excitable state allows for precise control of contractile proteins and enzymes to assemble at the right place and time during cell division, enabling accurate and adaptive management of the cell's shape.
A new study refutes the idea that a single group of chemicals controls reproduction across numerous social insect species, suggesting pheromones evolved uniquely in different species. The researchers found no effect on egg production, but ovary regression was positively correlated with time to egg laying.
Researchers found that two wasp species preferred different types of manure, highlighting the importance of identifying fly species for effective control. The study provides guidance on releasing wasps at the right time and frequency to manage horse flies sustainably.
A team of researchers used DNA barcoding to accurately identify over 13,000 fish eggs collected from the Ellen Browning Scripps Memorial Pier. The study provides a detailed picture of fish spawning patterns and creates a baseline for assessing future changes in spawning due to climate change.
A new study reveals that lizard embryos can die at 110 degrees Fahrenheit, even for short periods, due to the heat trap effect of nests. This bias in previous studies has led to overly optimistic forecasts about lizards' fate during climate change.
Researchers found that retrieving eggs from smaller follicles at an earlier stage in IVF improves embryo quality and clinical pregnancy rates. Granulosa cells' reduced ability to grow and multiply in older women's ovaries was linked to increased hormone sensitivity, leading to premature luteinisation.
The larger Pacific striped octopus exhibits unusual hunting tactics, displaying subtle tap-like movements to startle prey. It also displays high levels of sociality, forming groups of up to 40 individuals and engaging in cooperative behaviors such as sharing meals.
Scientists observed a rare Pacific striped octopus species exhibiting unusual cohabitation, hunting, and mating behaviors. The species challenges conventional understanding of octopus reproduction, displaying intimate beak-to-beak interactions during mating.
Researchers discovered that female stink bugs change the color of their eggs depending on the surrounding light environment. The darker-colored eggs, which are not darkened by melanin but a previously unknown pigment, offer protection against UV radiation when laid on top of leaves.
Research suggests warmer water temperatures in Lake Erie can lead to lower-quality eggs and larvae that struggle to survive. Yellow perch failure to adapt their spawning schedule contributes to the decline of this commercially important species, with numbers standing at only half of their peak in the 1960s.
Researchers developed an ultra-superovulation method to increase the number of eggs obtained from genetically modified mice, reducing the need for multiple females and improving efficiency in IVF and embryo transfers. The breakthrough could lead to a significant reduction in the number of experimental animals used in research.
A study by Dr. Marta Devesa found that IVF cumulative live birth rates decline significantly with age, especially in women using their own eggs, with a 3% chance of success at 44 and over. In contrast, egg donation shows higher success rates, making it a viable alternative for older patients.
Researchers found that pregnant pipefish males supply relatively low oxygen levels to their embryos, averaging 51% in well-oxygenated water and as low as 32% in poorly oxygenated conditions. Despite this, the fathers' care allows the young to survive and thrive, with a focus on nutrient supplementation and waste removal.
A new study uses 3D printed eggs to test how birds identify and reject parasitic eggs with greater precision. Researchers found that robins accepted 100% of blue-green eggs but rejected 79% of cowbird-like eggs, similar to past studies but with less variability and precise reproduction.
A University of Montana study found that songbird species vary in time devoted to warming eggs due to factors such as lifespan and predation risk. Longer-lived species with more future breeding opportunities invest less effort in keeping eggs warm, while those with shorter lives put more effort into caring for their young.
Biologists from KU Leuven found that water flea populations can rapidly adapt to rising temperatures and increased heat wave frequencies. The study, using 'resurrected' eggs, showed a 3.6°C increase in critical temperature for activity.
Researchers at NIH solved a mystery about ovarian cell origins and discovered how these cells share information during development. This new understanding may help identify causes of conditions like premature ovarian failure and polycystic ovarian syndrome.
A highly efficient CRISPR/Cas system has been developed for targeted long cassette insertion into the mouse genome, achieving efficiency of up to 50%. This breakthrough technology enables the creation of humanized mice for modeling genetic diseases and improving gene therapy safety.
Researchers at Salk Institute have developed a gene-editing technique to eliminate mitochondrial mutations, preventing babies from inheriting these diseases. The approach may offer new hope for carriers wishing to have children without the disease.
The FluEgg model examines complex dependencies between flow, temperature, and egg development to predict the likelihood of Asian carp reproduction in the St. Joseph River. The model highlights the importance of a fine balance between egg development and variable flow conditions.
Family physicians play a crucial role in advising young women about egg freezing, providing accurate information on its benefits and risks. The procedure can help preserve fertility, but costs are high, and evidence on success rates is limited.
Scientists have discovered a 100-million-year-old insect fossil that shows an adult female insect caring for its young, a behavior previously unknown to exist during the Mesozoic era. This discovery pushes back the earliest direct evidence of insect brood care by more than 50 million years.
Research by Carnegie Institution scientists links steroid hormone ecdysone with fat accumulation and egg development in fruit flies. The findings suggest that increased stored body fat and sugars support healthy oocyte production and fertility.
Researchers found that inhibiting molecular pathways involved in damage caused by stress response can improve egg viability. This approach may help obese women conceive using therapeutic approaches.
Researchers develop a transparent shell matching the shape and curvature of a real eggshell using PDMS, significantly extending embryo culturing time. The biomimetic system offers an excellent platform for studying functional embryo development and provides a natural diagnostic tool for early diagnosis.
Researchers at UC Riverside have identified microRNA-8 as a crucial regulator of mosquito reproduction, which plays an essential role in the female mosquito's 'fat body'. Depletion of miR-8 results in severe defects in egg development and deposition, highlighting its potential as a novel control strategy for mosquito populations.
Researchers have discovered that hoophoe birds cover their eggs with a secretion containing beneficial bacteria that increase successful hatching rates. The bacteria produce antimicrobial compounds that protect the embryo from pathogens and facilitate its development.
Researchers found a brownbanded bamboo shark pup born after nearly four years of isolation from males, marking the longest documented case of sperm storage in any shark species. The discovery highlights the sharks' ability to store sperm for long periods, promoting genetic diversity and potentially helping wild populations.
A new species of fanged frog has been discovered, giving birth to live tadpoles through internal fertilization, a rare reproductive method among frogs. The frog's unique behavior is just one example of the island's incredible biodiversity and adaptive radiation of species.
Researchers at Argonne National Laboratory have developed a method to capture images of the molecular fireworks that occur when an egg and sperm meet. The study, published in Nature Chemistry, provides unprecedented quantitative information on the role of zinc in regulating biochemical processes during fertilization.