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Latest Sexual selection Stories

2012-05-03 09:43:47

In most species, females prefer the most intense courtship display males can muster, but a new study finds that female cowbirds actually prefer less intense displays. The full results are published May 2 in the open access journal PLoS ONE. The researchers, led by Adrian O'Loghlen of University of California Santa Barbara, write that males direct more intense wing-spreading displays toward other males as aggressive communicative signals. It appears, however, that while these signals may...

Darwinian Selection Continues To Influence Human Evolution
2012-04-30 14:25:37

New evidence proves humans are continuing to evolve and that significant natural and sexual selection is still taking place in our species in the modern world. Despite advancements in medicine and technology, as well as an increased prevalence of monogamy, research reveals humans are continuing to evolve just like other species. Scientists in an international collaboration, which includes the University of Sheffield, analyzed church records of about 6,000 Finnish people born between...

Discerning Males Remain Faithful
2012-04-25 04:50:54

Discerning males remain faithful...if you are a spider. Sex for male orb web spiders (Argiope bruennichi) is a two shot affair since the act of mating destroys their genitalia. If they survive being eaten during their first encounter with a female, they have two choices — to mate again with the same female (monogynous) or try to find a new partner (bigynous). New research published in BioMed Central's open access journal Frontiers in Zoology shows that choice of mating behavior for A....

2012-04-02 15:49:26

Picky females play a critical role in the survival and diversity of species, according to a Nature study by researchers from the University of British Columbia and the International Institute for Applied Systems Analysis (IIASA) in Austria. To date, biodiversity theories have focused on the role played by adaptations to the environment: the species best equipped to cope with a habitat would win out, while others would gradually go extinct. The new study presents the first theoretical model...

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...

Study Indicates When Females Are Scarce, Men Spend More
2012-01-17 05:25:49

From peacocks to stags, it has long been commonplace knowledge amongst evolutionary biologists that males of many animal species tend to strut their stuff more ostentatiously the more scarce their potential female mates become. It´s known to scientists as sexual selection, and a recent study has demonstrated another specific effect of it in our own species. According to a study published in the Journal of Personality and Social Psychology, it seems that men may be more inclined to...

Male Spiders Eavesdrop To One-Up Their Rivals
2012-01-04 11:18:01

[ Watch the Video ] Just published this month, new research shows how spiders eavesdrop on other males and copy their courtship signals as a likely means of stealing their mate. Researchers have made a new discovery into the complex world of spiders that reflects what some might perceive as similar behavior in human society. As male wolf spiders go searching for a mate, it appears they eavesdrop, match and even try to outdo the mating dances of their successful rivals, a behavior seen...

2011-12-07 11:21:28

Scientists have observed a strategy for females to avoid unwanted male attention: choosing more attractive friends. Published today (7 December) in the journal Proceedings of the Royal Society B, the study is the first to show females spending time with those more sexually attractive than themselves to reduce harassment from males. Carried out by the Universities of Exeter and Copenhagen, the study focuses on the Trinidadian guppy, a species of small freshwater fish. It shows that the...

2011-12-01 22:34:42

News tips from the December issue of the American Naturalist Article Highlights from the December issue of The American Naturalist:     Columbia River Salmon are Adapting to Climate Change     Predators Keep Local Frogs In Uniform     Can sexual selection's bizarre creations sometimes set evolution on a path to novel survival strategies? For the complete table of contents for the December issue, go to www.journals.uchicago.edu/an....

2011-10-13 18:35:50

Grim economic times could cause men to seek more sexual partners, giving them more chances to reproduce, according to research by Omri Gillath, a social psychology professor at the University of Kansas. Men are likely to pursue short-term mating strategies when faced with a threatening environment, according to sexual selection theory based on evolutionary psychology. When made to think about their own death, which mimics conditions of "low survivability," Gillath and his colleagues...


Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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