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Latest Sexual conflict Stories

Flies That Live With Their Brothers Are Gentler Lovers
2014-01-23 13:39:47

University of Oxford Flies living with their brothers cause less harm to females during courting than those living with unrelated flies, say Oxford University scientists. The study, published this week in Nature, found that unrelated male flies compete more fiercely for females' attention than related flies, resulting in shorter lifespans for males and reduced fecundity for females. "In large populations brothers don't need to compete so much with each other for female attention...

2013-09-25 10:56:18

Male fruit flies like to have a variety of sexual partners, whereas females prefer to stick with the same mate – or move on to his brothers. An Oxford University study of mating preferences in fruit flies (Drosophila) has found that males and females respond to the sexual familiarity of potential mates in fundamentally different ways. While male fruit flies preferred to court an unknown female over their previous mate or her sisters, female fruit flies displayed a predilection for...

Sexuality Bonobo Female Dominance
2013-07-16 08:36:25

April Flowers for redOrbit.com - Your Universe Online Among mammalian species, female social dominance is rare. However, one of our closest living relatives, bonobos, are known for the relatively high statuses females hold in social groups. This puzzles researchers as the males are often bigger and stronger than the females. A new study from the Max Planck Institute for Evolutionary Anthropology has analyzed the dominance relations between male and female wild bonobos, taking particular...

2013-06-11 11:12:09

Females play a larger role in determining paternity than previously thought, say biologists in Syracuse University's College of Arts and Sciences. Their findings are the subject of a new paper titled "Female mediation of competitive fertilization success in Drosophila melanogaster," published this month by Proceedings of the National Academy of Sciences of the United States of America. Stefan Lüpold, a research assistant professor in the college's Department of Biology and...

Mosquito Fish Genitalia Redefine Hooking Up
2012-09-28 15:22:04

Brett Smith for redOrbit.com - Your Universe Online While the battle of the sexes can get quite ugly among humans, in the animal kingdom it can get downright nasty. North Carolina State University researchers have described a new species of fish in which the male´s genitalia are equipped with four hooks while the female sports a colorful anal spot that it likely uses to attract a mate. The new species, the llanos mosquito fish, or Gambusia quadruncu, lives throughout eastern...

2012-09-12 11:37:38

Sex can trigger remarkable female responses including altered fertility, immunity, libido, eating and sleep patterns - by the activation of diverse sets of genes, according to research from the University of East Anglia. Publishing today in the journal Proceedings of the Royal Society B, the researchers studied how female Drosophila melanogaster - or fruit flies — respond to mating. They discovered that a single protein found in semen generates a wide range of responses in many...

Mating Plugs Produced By Female Spiders To Prevent Unwanted Sex From Males
2012-08-05 10:30:36

redOrbit Staff & Wire Reports - Your Universe Online A new mechanism of animal mating plug production has been discovered by scientists at the Smithsonian and their colleagues. In the giant wood spider (Nephila pilipes), which is a highly sexually dimorphic and polygamous species, many small males will compete with each other for their chance with a few large females. These males have been known to sever their own genitals during mating in order to plug the female, gain paternity and...

Biologists Turn Back The Clock To Understand Evolution Of Sex Differences
2012-05-03 12:44:23

Battles of sexes shown to spur adaptive sex differences Sex differences account for some of the most of the spectacular traits in nature: the wild colors of male guppies, the plumage of peacocks, tusks on walruses and antlers on moose. Sexual conflict — the battle between males and females over mating — is thought to be a particularly potent force in driving the evolution traits that differ in males and females. However, the genetic processes responsible for producing such...

2012-04-26 09:47:47

Male praying mantises are more likely to engage in risky mating behavior if they have not had recent access to females, as reported Apr. 25 in the open access journal PLoS ONE. Female praying mantises are known for their cannibalistic behavior toward their mates, and males take a large risk when they attempt to reproduce. In the current work, led by William Brown of State University of New York at Fredonia, the researchers found that males modulate this risk by altering their approach rate...

Bonobos‘ Unusual Success Story
2012-01-24 04:00:24

Dominant males invest in friendly relationships with females Mate competition by males over females is common in many animal species. During mating season male testosterone levels rise, resulting in an increase in aggressive behavior and masculine features. Male bonobos, however, invest much more into friendly relationships with females. Elevated testosterone and aggression levels would collide with this increased tendency towards forming pair-relationships. Bonobos are among the...


Latest Sexual conflict Reference Libraries

Stegodyphus lineatus
2014-04-07 14:12:35

Stegodyphus lineatus is the only European species belonging to the spider genus Stegodyphus. The males of this species are up to 12 millimeters long, while the females are up to 15 millimeters long. The coloration can range from whitish to almost black. In the majority of individuals, the opisthosoma is whitish with two broad black longitudinal stripes. The males and females look similar, but the male is usually richer in contrast and has a bulbous forehead. The species name is in...

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