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Latest Sexual selection Stories

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2010-05-03 09:26:45

Ever since Darwin, researchers have tried to explain the enormous diversity of plumage color traits in birds. Now researchers at the University of Gothenburg, Sweden, are adding something new to this particular field of research, which is so rich in tradition, by demonstrating how a bird can become red instead of yellow. Sixteen years ago, Malte Andersson, a professor at the University of Gothenburg, published the book Sexual Selection, which analyzed how animals use behavioral signals,...

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2010-04-09 08:50:00

The vocalizations or "Ëœgroans' of male fallow deer provide rivals and potential mates with an honest account of the emitting animal's competitive abilities. A study, published in the open access journal BMC Biology, describes how the acoustic qualities of a deer's call change year by year and reflect changes in status and age. Alan McElligott and Elodie Briefer from Queen Mary, University of London together with Elisabetta Vannoni, University of Zurich, studied fallow deer, during...

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2010-04-05 07:49:32

Mothers win the genetic tug of war by producing more sons with larger fathers and more daughters with smaller fathers "Be faithful in small things because it is in them that your strength lies." Mother Teresa's words echo throughout the world. They ring particularly true in the biological kingdom among brown anole lizards, as evidenced in research detailed in the April 2 edition of the journal Science. Dartmouth researchers Ryan Calsbeek and Bob Cox study male and female brown anole lizards...

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2010-03-19 08:22:45

Previously unobservable events occurring between insemination and fertilization are the subject of a groundbreaking new article in Science magazine (March 18) by Mollie Manier, John Belote and Scott Pitnick, professors of biology in Syracuse University's College of Arts and Sciences. By genetically altering fruit flies so that the heads of their sperm were fluorescent green or red, Belote and his colleagues were able to observe in striking detail what happens to live sperm inside the female....

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2010-03-17 13:25:00

Male pipefishes and their seahorse cousins are the only males that actually become pregnant and give birth, but pipefishes likely will never win any Father of The Year awards "“ their attitude towards their offspring can range from total love to total neglect, according to new findings from Texas A&M University researchers. Kim Paczolt and Adam Jones, researchers in the Department of Biology, found that the male pipefish can be a nurturing father as it tends its young before giving...

2009-12-09 20:02:03

Female birds in species that breed in groups can find themselves under pressure to sexually show off and evolve the same kinds of embellishments "“ like fanciful tail feathers or chest-puffing courtship dances - as males, according to new research in the latest issue of Nature (Dec. 10, 2009). "We've known it happens with females in some specialized cases, but it's probably more widespread than we ever realized before," said Irby Lovette, the Fuller Director of Evolutionary Biology at...

2009-12-08 11:23:45

Females can be too attractive to the opposite sex "“"“ too attractive for their own good "“"“ say biologists at UC Santa Barbara. They found that, among fruit flies, too much male attention directed toward attractive females leads to smaller families and, ultimately, to a reduced rate of population-wide adaptive evolution. In an article published in the December 8 issue of Public Library of Science Biology, the authors described their experiments on the sex lives of...

2009-11-26 14:26:59

Is speciation adaptive? Darwin suggested that the action of natural selection can produce new species, but 150 years after the publication of his famous book, 'On the Origin of Species', debate still continues on the mechanisms of speciation. New research finds sexual selection to greatly enlarge the scope for adaptive speciation by triggering a positive feedback between mate choice and ecological diversification that can eventually eliminate gene flow between species. By means of a...

2009-11-18 14:19:50

Males have more pronounced personalities than females across a range of species "“ from humans to house sparrows "“ according to new research. Consistent personality traits, such as aggression and daring, are also more important to females when looking for a mate than they are to males. Research from the University of Exeter draws together a range of studies to reveal the role that sexual selection plays in this disparity between males and females. The study shows that in most...

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2009-11-06 07:12:10

Scientists find a population of butterflies that appears to be splitting into 2 species Breaking up may actually not be hard to do, say scientists who've found a population of tropical butterflies that may be on its way to a split into two distinct species. The cause of this particular break-up? A shift in wing color and mate preference. In a paper published this week in the journal Science, the researchers describe the relationship between diverging color patterns in Heliconius butterflies...


Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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