New genes spring and spread from non-coding DNA
"Where do new genes come from?" is a long-standing question in genetics and evolutionary biology. A new study from researchers at the University of California, Davis, published Jan. 23 in Science Express, shows that new ge ...
Sexual selection enhances ability of offspring to cope with infection
Offspring from female mice who mate with their preferred male are better able to cope with an experimental infection compared to those of females mated with non-preferred males, according to new results published ...
Does it pay to be a lover or a fighter? It depends on how you woo females
As mating season approaches, male animals are faced with a question that can make or break their chances at reproducing: does it pay to be a lover or a fighter? Or both?
A guppy's spots formed by layers of color cells
At least three pigment cell types from multiple layers of skin contribute to the color patterns of male guppies, according to a study published in PLOS ONE on January 22, 2014 by Verena Kottler from the Ma ...
Flies with brothers make gentler lovers
Flies living with their brothers cause less harm to females during courting than those living with unrelated flies, say Oxford University scientists.
Desire to reproduce drives active nightlife of birds
For a non-nocturnal bird, the yellow-breasted chat spends a significant amount of time visiting other birds' territories during the night. A University of Illinois researcher who was studying birds' movement ...
Polar bear dies at South African zoo
One of South Africa's two polar bears has died at the Johannesburg Zoo, leaving its mate now believed to be the only polar bear in Africa, a veterinarian said Wednesday.
Sexual selection may result in bigger-billed male birds
(Phys.org) —To female coastal plain swamp sparrows, male bill size matters.
Risky behaviour more likely in male fish than female
Male stickleback fish are bolder and more willing to take risks than females, say scientists.
Study: Half of black males, 40 percent of white males arrested by age 23
Nearly half of black males and almost 40 percent of white males in the U.S. are arrested by age 23, which can hurt their ability to find work, go to school and participate fully in their communities.
Shudder action buys time for male spider from being killed
Mating is the kiss of death for certain female worms
The presence of male sperm and seminal fluid causes female worms to shrivel and die after giving birth, Princeton University researchers reported this week in the journal Science. The demise of the female ...
Lion numbers could improve with new sustainable hunting quotas
Researchers have devised a simple and reliable way to set sustainable quotas for hunting lions, to help lion populations to grow, in a new study.
Sandcastle-building fish offer evolution clue
(Phys.org) —In Lake Malawi, East Africa, there are around 200 different species of cichlid fish that once or twice a year build large sand structures (known as bowers) on which the fish mate. Each different ...