Frogs from groups exposed to a deadly virus are breeding at younger ages, new research suggests. Scientists studying European common frogs in the UK compared groups (“populations”) exposed to ranavirus and those free from the disease. While the youngest breeding frogs in disease-free populations are four years old, frogs in virus-exposed groups breed as young […]Continue Reading ...
For most of human history, our guts were exposed only to the wild foods available in our environment. Beginning some 1.8 million years ago, during the time of Homo erectus,humans were a nomadic, hunter-gatherer species whose diet consisted of fish and meat, along with seasonal seeds, nuts, roots, vegetables and berries. It wasn’t until around […]Continue Reading ...
Retroviruses have colonized vertebrate hosts for millions of years by inserting their genes into host genomes, enabling their inheritance through generations as endogenous retroviruses (ERVs). Researchers from Uppsala University now provide new knowledge about the long-term associations of retroviruses and their hosts by studying ERV variation and segregation in wild and domestic rabbit populations. The […]Continue Reading ...
Beak and feather disease virus (BFDV) in wild parrot populations has been detected in eight new countries, raising concerns for threatened species. The new countries where BFDV was found are Bangladesh, Pakistan, Japan, Nigeria, Seychelles, Vietnam, Senegal and The Gambia and were identified in a study led by Deborah Fogell in the University of Kent’s […]Continue Reading ...
In the African component, we see smaller estimated pre-admixture effective sizes for Cuba (150,000) and Mexico (100,000) than for the Dominican Republic (700,000), suggesting that the African ancestors of the former two populations came from smaller sub-populations of Africa than the African ancestors of the latter two populations. In the European component we see smaller […]Continue Reading ...
African and Asian rainforest hunter-gatherers share short stature, and now an international team of researchers has shown that this is an example of convergent adaptation that may also be linked to changes in cardiac development pathways. “We know that rainforest populations become small,” said Christina M. Bergey, postdoctoral fellow in anthropology. “The question is did […]Continue Reading ...
Credit: CC0 Public Domain Using an artificial intestine they created, researchers have shown that the microbiome can quickly adapt from the bacterial equivalent of a typical western diet to one composed exclusively of dietary fats. That adaptation involved an increase in the populations of fatty-acid metabolizing species and a drop in those of protein and […]Continue Reading ...
Progesterone is also used as a medication for pregnant women at risk of delivering too early, such as those who have given birth prematurely before. Still, giving extra progesterone to such women does not always prevent an early delivery. No one knows why. The new study used data from the 1,000 Genomes Project, a publicly […]Continue Reading ...
June 19, 2018 Researchers at the University of Waterloo may have discovered a new, pesticide-free way to limit mosquito populations in some area and reduce the spread of the West Nile virus. Waterloo researcher Brad Fedy discovered that introducing hungry minnows into bodies of water where mosquitoes breed results in the minnows feeding on mosquito […]Continue Reading ...
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