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Latest Sexual selection Stories

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2011-08-17 10:39:49

While the early bird might catch the worm, it's the quick bird that lands the ladies, according to new research into the running performance of an Arctic cousin of the grouse. Scientists studying rock ptarmigan on the Norwegian archipelago of Svalbard discovered a large difference in the running capabilities between the sexes, with the larger males able to run more efficiently and up to 50% faster than females. The University of Manchester team suggested that faster, efficient male birds are...

2011-06-29 06:59:46

(Ivanhoe Newswire) "“ The U.S. FDA notes "some concern" with the chemical BPA and some countries have considered BPA product bans. Still, scientists disagree about the effects of BPA on animals and humans. This study shows BPA to cause male deer mice to become demasculinized and behave more like females in their spatial navigational abilities, leading scientists to believe that exposure to BPA during human development could be damaging to behavioral and cognitive traits that are unique...

2011-05-27 13:37:04

How females select their sexual partners is a matter of more than passing concern to a large number of males.  Focus has gradually switched from the idea that certain males are the most attractive or the best and researchers are increasingly considering the idea that particular individuals might be intrinsically compatible.  Dating agencies routinely include questions about potential partners' hobbies and interests.  Such issues are clearly important but the latest results from...

2011-05-16 15:59:15

Aggressive male mating behavior might well be a successful reproductive strategy for the individual but it can drive the species to extinction, an international research team headed by evolutionary biologist Daniel Rankin from the University of Zurich has demonstrated in a mathematical model. Evolutionary biologists have long debated whether the behavior of the individual is able to influence processes on a population or species level. The possibility of selection at species level is still...

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2011-04-28 09:22:03

Male peacock tail plumage and courtship antics likely influence their success at attracting and mating with females, according to recent Queen's University research. Roz Dakin and Robert Montgomerie have found that natural variation in the number of eyespots on a peacock's tail does not impact a male's mating success. However, peacocks whose tails are clipped to considerably reduce the number of eyespots are less successful at mating. Female rejection of males with substantially fewer...

2011-04-07 13:57:24

Female deer do not always choose the bigger and dominant males to mate with, scientists from Queen Mary, University of London and Hartpury College have found. The research, which was undertaken in Dublin's Phoenix Park on a herd of fallow deer, focussed on females who chose not to mate with the 'top' males. The study, published today (6 April) in PLoS ONE found that yearling females tended to mate with a higher proportion of younger, lower ranking males while older females actively avoided...

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2011-02-22 10:03:51

Polygamy practiced by some 19th century Mormon men had the curious effect of suppressing the overall offspring numbers of Mormon women in plural marriages, say scientists from Indiana University Bloomington and three other institutions in the March 2011 issue of Evolution and Human Behavior. Simply put, the more sister-wives a Mormon woman had, the fewer children she was likely to produce. "Although it's great in terms of number of children for successful males to have harems, the data show...

2011-02-01 21:51:50

Mate guarding is classified as excessive or unwarranted jealous or protective behavior towards a spouse or mate. This is common among many different species and can be useful to defend territory, guarantee paternity, or prevent disease. The authors of a new study published in Personal Relationships have discovered that this behavior is more common in societies which practice arranged marriages or in cultures that place a high value on parental influence in the choice of mate for their...

2010-12-23 17:31:03

When prowling for a hook up, it's not always the good-looker who gets the girl. In fact, in a certain species of South American fish, brawn and stealth beat out colorful and refined almost every time. In a series of published studies of a South American species of fish (Poecilia parae), which are closely related to guppies, Syracuse University scientists have discovered how the interplay between male mating strategies and predator behavior has helped preserve the population's distinctive...

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2010-11-25 08:32:37

You may think of your love for your mate as the noble emotion of a pure heart, but some primitive parts of your brain are taking a decidedly more pragmatic approach to the subject, according to Stanford biologists. In experiments with African cichlid fish, the scientists discovered that when a female shows a preference for a particular male, but then witnesses him losing a fight with another male, her feelings toward him change. Areas of the female's brain associated with anxiety showed...


Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.