Articles tagged with Animal Breeding
A study published in the Journal of Dairy Science found that feeding behavior traits are correlated with feed efficiency in lactating dairy cattle. Researchers estimated genetic parameters for feeding behavior and their associations with feed efficiency traits in US Holstein cows.
Researchers found two distinct populations of the invasive American bullfrog in Brazil, one descended from 1935 introductions and another from the 1970s. The study highlights the need for law enforcement to prevent escape from frog farms.
Researchers find that cooperative breeding in animal societies increases survival chances of carers, leading to higher reproductive success. The study also reveals the relative importance of kin selection and individual selection varies depending on environmental conditions.
Researchers have identified a genetic marker that predicts East Coast fever tolerance in cattle, paving the way for breeding programs and potentially reducing livestock losses by up to 100%. The discovery could also lead to more sustainable and cost-effective farming practices in Africa.
New research from The University of Manchester found that poaching combined with individual rhino's reproductive variance significantly increases the risk to black rhino survival. Reproductive skew, or variation in breeding success between females, can exacerbate extinction risk by up to 70% in small populations.
A new test, RHEOLEX, can quickly detect breeding bull fertility levels using a simple, home pregnancy test-like device. The test mimics the biological process of rheotaxis, in which sperm swim upstream in the reproductive tract, to quantify the sperm's ability.
A study has decoded the DNA of the Arabian Oryx, a vulnerable species that was on the brink of extinction. The researchers analyzed the genetic data to inform breeding programs and found moderate diversity in the population's gene pool.
Ancient Mesopotamian societies produced equid hybrids called kungas by crossing domestic donkeys with wild asses, offering a unique combination of strength and control. These animal hybrids were used for warfare and travel before the arrival of domestic horses in the region.
Young dairy calves are motivated to seek full social contact, even with partial interaction, according to a new study. The researchers found that calves pushed more weight to access pens with a social partner compared to empty pens, highlighting the importance of socialization for calf development.
A new study reveals that medieval warhorses were bred for success in various functions, including tournaments and long-distance raiding campaigns. The research, published in the International Journal of Osteoarchaeology, found that breeding and training were influenced by biological and cultural factors.
A team of scientists led by Vimal Selvaraj has developed a way to preserve the genetic diversity of fast-disappearing native cattle breeds using stem cells. This technology could be used to clone extinct breeds or to produce animals with desirable traits, such as disease resistance and extreme weather tolerance.
A modelling study estimates nearly a quarter of a million unowned cats in UK urban areas, with higher deprivation and density linked to higher abundance. Socioeconomic factors and human population density were key predictors of unowned cat presence.
Researchers found that great tits nesting near healthy oak trees advance their egg-laying timing more than those near unhealthy oaks. The variation in timing is linked to the health of nearby oak trees and reveals patterns masked by population-wide studies.
Researchers discovered fossilized footprint tracks of straight-tusked elephants, indicating a Late Pleistocene nursery site in Huelva, Spain. The tracks suggest that young elephants, possibly up to two years old, were raised in this area, which may have provided a food source and reproductive habitat for female elephant herds.
Research shows that large eggs in small hens lead to keel bone fractures, affecting 85% of Danish laying hens. Hens from different production systems also suffer from the issue.
SECORE International's coral breeding technique shows significant success in closing the gap to scale for coral restoration, using floating mesocosms to produce thousands of coral recruits. The approach promotes genetic diversity and can help corals cope with climate change.
A new study found that heat stress in pregnant dairy cows reduces fetal growth and influences the performance and immune development of offspring. Calves born to heat-stressed cows have lower birth weights, organ weights, and higher rates of cell death, suggesting compromised placental and fetal development.
A new study finds that male acorn woodpeckers breeding in polygamous groups with one or two other males sire significantly more chicks over their lifetimes than males breeding alone. In contrast, females in polygamous groups leave behind fewer offspring than those in monogamous pairs.
Archaeologists found that the lack of a mutualistic relationship between humans and New World rabbits, characterized by controlled reproduction, prevented domestication. The solitary nature of American cottontails made it difficult for humans to control their population and evolution.
A study of online surveys from five countries reveals that genome editing is generally viewed as beneficial for crops but raises concerns about animal welfare. The research found four distinct groups: strong supporters, supporters, neutrals, and opponents, with 21% strongly supporting the technology.
Male jackdaws don't provide consolation to their mate after a traumatic experience, focusing on self-preservation instead. Researchers found that males decrease their nest visits and time with the female after an attack, suggesting they prioritize their own safety over comforting their partner.
A genetic analysis of leopard geckos has identified a cancer gene linked to skin tumors, shedding light on the animals' unique coloration patterns. The study, published in PLOS Genetics, suggests that the geckos' bright colors may be caused by an error in the gene, leading to overproduction of white skin cells and reflective crystals.
Researchers found much higher abundances of antibiotic-resistant bacteria and genes on microplastics in urban than rural areas of the Beilun River. Polypropylene had the highest abundance of ARGs, increasing by 1,000 times from rural to urban areas.
The study provides clues to how early agricultural practices shaped the evolution of these animals. Genetic analyses show that the ancient goats fell at the base of the domestic goat lineage, suggesting they were closely related to the animals first recruited during domestication.
A survey of 656 students from six countries found that over a third were unaware of zoonotic risks and One Health concept. Education on these topics is crucial to prevent pandemics.
Researchers at Stockholm University found little evidence that animals avoid mating with relatives, contradicting long-held assumptions. This study synthesizes 139 experimental studies across 88 species and has implications for conservation breeding programs aimed at maintaining genetic diversity.
A review in the Journal of Dairy Science examines how US dairy industry breeding selection objectives are established, detailing opportunities and obstacles related to new technologies. The net merit dollars (NM$) selection index has increased the rate of gain in dairy cattle through genomic selection, but challenges remain in measurin...
A study published in PLOS Genetics identified the RORB gene as necessary for rabbits to perform their characteristic jumping gait. The researchers used a rare breed of domesticated rabbit with a developmental defect to pinpoint the cause, finding a specific mutation in the RORB gene that disrupts the animal's ability to jump.
Climate change is projected to worsen heat stress conditions in East Africa, impacting dairy cattle, beef cattle, sheep, goat, pigs, and poultry. Implementing well-targeted climate adaptation strategies, such as breeding heat-tolerant animals and providing adequate water access, is crucial to mitigate the effects of rising temperatures.
A global study shows that human disturbances, such as hunting and recreation, trigger significant changes in animal movement, forcing species to travel 35% more or less than usual. This widespread impact threatens biodiversity and ecosystem processes, highlighting the need for conservation efforts.
Naked mole-rats form distinctive, colony-specific chirps that convey individual's social membership and are culturally transmitted across generations. These dialects change when a queen dies and young pups learn the dialect of their adoptive groups.
Researchers have reconstructed a small Psittacosaurus dinosaur's all-purpose opening for the first time, comparing it to modern vertebrates. The cloaca displays pigmentation and features reminiscent of crocodilians and baboons, potentially indicating display and signaling functions.
A new study found that as ocean temperatures rise, baby sharks are born smaller, exhausted, and undernourished, facing difficult environments for survival. The research suggests the future of these species will be threatened by warming waters.
Researchers found that migrants develop faster, produce offspring earlier, and die younger due to energy constraints. This could explain the decline of many migratory species as they may struggle to adapt to changes in habitats and climate.
Scientists analyzed geochemical data from mummy remains to determine if they were bred or hunted. The results indicate that the birds were wild and migrating seasonally, suggesting mass hunting and capture. This discovery sheds light on ancient Egyptian practices and their impact on the environment.
Scientists have created pigs, goats, and cattle with the ability to produce sperm carrying only donor animal traits, enabling selective breeding and improving food production. This technology has great potential for genetic conservation of endangered species and addressing global food insecurity.
Researchers found a biological switch in the pituitary gland that enables animals to adapt to changing seasons, governed by hormones and genes. The study reveals a crucial role of the circadian gene BMAL2 in seasonal adaptations, shedding light on the underlying processes.
Researchers at the University of Queensland have found a strong association between genes influencing cattle temperament and autism in humans. The study's findings could lead to improved animal welfare and meat quality by identifying genetic markers for better temperament.
Researchers found that selective breeding of junglefowl for reduced fear led to changes in brain composition and affected fear memory. The domesticated birds became accustomed to non-hazardous events more rapidly due to smaller brains relative to body size.
A new study found that transmission risk of the PPRV virus increases with specific husbandry practices, including introducing sheep or goats to herds and attending seasonal grazing camps. In contrast, herd size was not related to transmission risk, but rather social cliques formed within individual compounds.
A study found that animals who try to sound 'bigger' are often skilled sound learners. Researchers analyzed the sounds and body size of 164 mammals and discovered that those who fake their size are frequently good at learning new sounds. This discovery may provide insight into human speech evolution.
A new epidemiological study found significant welfare concerns for hoarded cats not just from home environments but also from institutional settings. The study, which analyzed 371 hoarded cats relinquished to a shelter, showed that conditions such as overcrowding, uncontrolled breeding, and neglect were prevalent.
Researchers at Goethe University have successfully produced tsetse fly attractants in genetically modified brewer's yeast, which could be used to contain sleeping sickness. The new production method is cost-effective and environmentally friendly, making it suitable for rural communities in Africa.
Scientists from Penn State University and NAGP have successfully reintroduced genetic diversity into modern Holsteins by using semen from the 1950s. The reintroduction of two lost male lineages, Colantha and Netherland Prince, demonstrates the possibility of expanding research into Y-chromosome variation.
Research has discovered that a unique type of algae on turtle shells influences the surrounding microbial communities. This finding may contribute to supporting turtle conservation by understanding how diverse microbiomes protect animals against infections.
Researchers found that African lions' genetic diversity loss in the KAZA region was caused by their need to adapt to different habitats. This suggests that ecological factors, rather than human impacts, are responsible for this loss. The study's findings have important implications for wildlife conservation managers.
Researchers argue for mobile marine protected areas in international waters to protect highly mobile species affected by climate change. New technologies, such as satellite tracking, enable dynamic management strategies that adjust to species' movements and habitats shifts.
Researchers at MLU and Georg August University Göttingen discovered a gene responsible for tyloma, an interdigital hyperplasia affecting up to 60% of German cattle. The disease can lead to tears in skin, bacterial infections, and shortened lifespans.
Researchers at Kyoto University found that bottlenose dolphins can coordinate their behavior in a rope-pulling task, with initiators waiting for followers to reach the task and followers matching the initiator's swimming speed. This flexible coordination is likely rooted in their patterns of affiliative behavior.
University of Hawaii researchers have captured a groundbreaking video of humpback whales using bubble nets, providing new insights into the fine-scale details of this behavior. The study is part of a larger project investigating causes of a possible decline in humpback whale numbers.
Researchers discovered that warty and smooth-skinned octopuses from different depths are the same species. The deeper they live, the bumpier their skin and smaller their bodies. Genetic analysis confirmed these findings, indicating that environmental factors, such as food availability, influence the animals' appearance.
Researchers found higher levels of stress hormone corticosterone in white-tailed sea eagles near paths or roads, but not on breeding success. Protection zone regulations may need adjustment to prevent negative effects on breeding performance.
Researchers identified two key elements of animal life cycles: pace (reproduction rate and lifespan) and shape (mortality rate across lifespan). This study provides insights into conservation strategies and predicts winners and losers from the global environment crisis.
A new breeding method increases genetic selection efficiency, conserving or improving population diversity. It considers variance in gametic diversity and relative predicted transmitting ability, resulting in gains of up to 16% compared to traditional methods.
A recent study found that climate change can lead to a loss of genetic diversity in species like the alpine marmot. The animal's low genetic diversity makes it vulnerable to adapting to environmental changes.
A team from Kyoto University analyzed the dispersal patterns of golden lion tamarins, revealing that males and females use different tactics to maximize their reproductive success. The study aims to inform management strategies for conserving other threatened species.
Researchers at Oxford University have developed a method to produce eggs from ovarian tissue in labs, providing new hope for the critically endangered Northern White Rhino. The technique could enable conservationists to pull species back from extinction by utilizing ovarian tissue from old or injured animals.
The study found that Britain's native mammalian carnivores have largely recovered since the 1960s, with otters, badgers, and pine martens showing significant improvements. The species' recovery is attributed to legal protection, conservation, and restoration of habitats.
Researchers found that Magellanic penguin parents divide food equally among their offspring, regardless of age or size. This unusual behavior was observed in nests with two chicks, who received the same amount of food despite being 22% apart in weight.
A study at Flamingo Land zoo in the UK found that puppet theatre performances increased knowledge of animals and conservation among children and adults by 22% and 18%, respectively. The research suggests that conventional zoos can achieve similar levels of learning through entertainment-driven settings.