Tag: "mating" at biology news

Why the best things come to those who wait

...y of Exeter's School of Biosciences studied female mating with multiple males, especially species who mate with more than one partner in rapid succession, and discovered why the last male in line is most likely to impregnate the female. Many insect species but also mammals such as ground squirrels and eve...

A little of what you fancy does you no good

...xtravagant plumage, towering antlers, and frenetic mating displays, Darwin proposed, because that's what females like. Selection on secondary sexual characteristics often results in sexually dimorphic traits being tailored toward the specific reproductive needs of each sex, and sexual dimorphism typically a...

Female pronghorns choose mate based on substance as well as show

...y can be maintained. If an ornament gives a male a mating advantage, then evolution would rapidly move to the point where all males, regardless of genetic quality, have high-quality ornaments. "Female mate choice is likely a very important evolutionary force that does much more than select for ornaments in...

'Fruit fly dating game' provides clues to our reproductive prowess

... graduate student Alison Pischedda have found that mating with a "fit" partner actually leads to dramatically lower rates of reproductive success in the next generation. The research also raises questions about how masculine and feminine traits may be expressed through genes. The findings, published in ...

Researchers find that bumblebees' flower choice matters

...ted that adjacent flowers differ markedly in their mating patterns. "It's amazing what we've found," he says...s research group was the first to demonstrate that mating patterns differ dramatically among individual flowers and the first to show that the presence of com...

Michigan State researcher traces the evolution of honey bee gender

...allow breeders to design better and more efficient mating systems. Breeders more easily will be able to rais...that after a queen bee returned to her hive from a mating flight she had a choice of laying fertilized or unfertilized eggs. The unfertilized eggs would devel...

Male chimpanzees prefer mating with old females

Researchers studying chimpanzee mating preferences have found that although male chimpanz...himpanzees participate in a relatively promiscuous mating system, humans form unusually long-term mating bonds, thereby making young females more valuable as ...

Dragonfly's metabolic disease provides clues about human obesity

...ts per kg. The life of a dragonfly and successful mating requires intense competition for pond territory, aerial contests, and high-performance flight. "These guys are the jet fighters of the insect world," said Marden. Flight muscle makes up 60 percent of their body mass. The large variation in muscle ...

Why do some queen bees eat their worker bee's eggs?

...red 50 species and found no evidence that multiple mating by the queen correlated with reduced rearing of workers' sons or greater worker reproductive policing. Were the textbooks wrong" A new study appearing in the current issue of The American Naturalist strongly supports Hamilton's original theory. Tom...

Queen bee promiscuity boosts hive health

...or the rest of her life, queen honeybees go out on mating flights and obtain sperm from a dozen or more males," said lead author Thomas Seeley, Cornell professor of biology and chair of the Department of Neurobiology and Behavior. Seeley and David Tarpy of North Carolina State University tested the leading ...

Geneticists discover genes that make fruit fly hybrids sterile

While hybrids -- the result of the mating of two different species -- may offer interesting ...to survive. For example, a mule, the result of the mating of a horse and a donkey, is sterile. Now, Cornell researchers have made the first identification of ...

A new male-specific gene in algae unveils an origin of male and female

... algae species, Pleodorina starrii, and one of the mating types of its isogamous ancestor, the unicellular a...tion occurs through "plus" (MT+) and "minus" (MT-) mating types. MT- represents a "dominant sex" because a particular gene, MID ("minus-dominance") of C. rein...

Singing for survival

... and are commonly used in their daily routine when mating pairs 'duet' every morning. Songs in response to predators mostly large cats, snakes and birds of prey have been previously noted, but no extensive research into its purpose or understanding by other gibbons has been done until now. The team, E...

UCR researchers examine how some invasive plants gain a foothold

...ted by population size and the degree to which the mating pairs were genetically related. They found that, a...ngle's bar effect,'" Ellstrand said. "Namely, that mating success increases both with the number of possible mates and their sexual receptivity." Using pop...

The price of vanity: Mating with showy males may reduce offspring's ability to fight off pathogens

...dith Mank (Uppsala University, Sweden) finds that mating with males who possess showy traits such as bright colors or long tails and fins results in higher testosterone levels in males over many generations. Because male and female testosterone levels are correlated, female choice also results in an inc...

Firewood unintentionally transports emerald ash borer

...eek, the beetles will mate. Seven to 10 days after mating the female beetle is attracted to the upper branches of a living ash tree where she deposits eggs in bark crevices. The eggs hatch in about 10 days. The larva bores into the bark and feeds just under the bark where it makes serpentine tunnels. It ...

For some species, an upside to inbreeding

..., the researchers found that individuals preferred mating with unfamiliar close kin rather than non-kin. Because parental work is energetically costly, and kinship generally favors cooperation, one possible explanation for kin preference in breeding in this species is that it offers a benefit by facilitatin...

Male-killing bacteria makes female butterflies more promiscuous

... some populations of tropical butterfly the entire mating system is determined by a group of bacteria known ... to know what the effect of the bacteria is on the mating system, and here we've shown that butterfly mating patterns are strongly determined by the killer ba...

Female Antarctic seals give cold shoulder to local males

... remain static waiting to be chosen). This unique mating practice enables the seals to avoid the loss of ge...been assumed that the females were passive, simply mating with their nearest male. However, using paternity tests, the scientists demonstrated that only a qu...

The love song of male tngara frogs

Why do predators and parasites eavesdropping on mating signals of their prey preferentially attack indivi...es in predators and parasites that use tngara frog mating calls to find their prey. Their research appears in the March issue of the American Naturalist. Male...

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(Date:8/28/2014)... groups and clinicians is critical to the development ... of Georgia research. , A qualitative study of ... that role models for successful breastfeeding help positively ... "Mothers who received that support are more likely ... Alex Anderson, an associate professor in the College ...
(Date:8/28/2014)... (Maximizing Access to Research Careers) Program has announced ... of Sports Medicine,s Conference on Integrative Physiology of ... These awards are meant to promote the ... underrepresented groups into the mainstream of the basic ... young scientists at the American College of Sports ...
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