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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