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Bird fads weaken sexual selection

There's a new look for a hot male among lark buntings every year.

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Keywords: bird, fads, weaken, sexual, selection, fad

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Similar news on "Bird fads weaken sexual selection":

1. Does evolution select for faster evolvers?
   01-29-2007 · EurekAlert!
   A January 29 study in Physical Review Letters suggests the speed of evolution has increased over time because bacteria and viruses constantly exchange transposable chunks of DNA between species, making it possible for life forms to evolve faster than they would if they relied only on sexual selection or random genetic mutation. The Rice University findings come from the first exact solution of a mathematical model of evolution that accounts for cross-species genetic exchange.
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2. Study looks at mitochondrial variation in sperm traits and sperm competitive ability
   09-19-2007 · EurekAlert!
   Study considered an important link in the field of sexual selection, where maternal inheritance of mitochondria may well have its greatest impact on sperm traits and competitive ability but thus far has been largely overlooked.
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3. A little of what you fancy does you no good
   10-23-2006 · EurekAlert!
   Hemiclonal analysis of Drosophila melanogaster reveals that high-fitness males produce low-fitness daughters and high-fitness mothers produce low-fitness sons, with implications for models of sexual selection.
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4. Simple reason helps males evolve more quickly
   11-14-2007 · EurekAlert!
   Evolutionary biologists have focused on sex differences since Darwin's "Origin of Species." A straightforward but seemingly underappreciated explanation for the ability of males to answer the call of sexual selection may be that their genetic machinery is simpler.
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5. More flight than fancy?
   04-05-2007 · EurekAlert!
   Scientists from the universities of Exeter and Cambridge have turned atextbook example of sexual selection on its head and shown that females may be more astute at choosing a mate than previously thought. New research, funded by the Leverhulme Trust and published online on April 5 in Current Biology, shows that differences in the lengths of the long tail feathers possessed by male barn swallows are an example of natural selection, not sexual selection.
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6. Male deer are born to live fast, die young
   08-31-2007 · EurekAlert!
   Natural selection favors reproduction rather than survival. Males of ungulate species subjected to intense male-male competition in order to mate have shorter lives than females. Males are born already with smaller molars relative to their body size, which means the teeth won't last as long. These findings provide insight into how natural and sexual selection design our bodies.
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7. Changing fashions govern mating success in lark buntings, study finds
   01-24-2008 · EurekAlert!
   A study of how female lark buntings choose their mates adds a surprising new twist to the evolutionary theory of sexual selection. Researchers at UC Santa Cruz discovered that female lark buntings show strong preferences for certain traits in the males, but those preferences change from year to year.
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8. New Drug Blocks Influenza, Including Bird Flu Virus
   10-06-2006 · ScienceDaily
   Opening a new front in the war against flu, researchers at the University of Wisconsin-Madison have reported the discovery of a novel compound that confers broad protection against influenza viruses, including deadly avian influenza.
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9. Climate change creates dramatic decline in red-winged black bird population
   11-13-2006 · EurekAlert!
   Global warming strikes again. A University of Illinois researcher reports that a red-winged black bird population in Ontario, Canada has decreased by 50 percent since 1972. The decrease is related to a positive shift in the North Atlantic Oscillation which has resulted in warmer, wetter winters in the southeastern United States.
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10. New bird, bat species revealed by extensive DNA barcode studies
    02-18-2007 · EurekAlert!
    At unprecedented levels of difficulty involving highly biodiverse and continent-sized landscapes, scientists have successfully tested their ability to identify and DNA "barcode" entire assemblages of species -- the prelude to a genetic portrait of all animal life on Earth.
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