(Phys.org) —Biology researchers Nikolai Tatarnic and Gerasimos Cassis of the University of New South Wales and Macquarie University in Sydney, report in a paper they've had published in the journal The American Naturalist, ...
New research from evolutionary biologists at the University of Toronto shows that the male guppy grows claws on its genitals to make it more difficult for unreceptive females to get away during mating.
Plants & Animals
Aug 2, 2013
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(Phys.org) —It's not always easy to tell if a fish is male or female: they look more or less the same. But there are exceptions, such as guppies and, as with humans, guppy genitalia varies in size across the species.
Plants & Animals
Jun 3, 2013
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(Phys.org)—Researchers working in China have discovered an insect that lived 165 million years ago that they believe used its wings to mimic the leaves of an ancient ginkgo tree. The fossil finding, the team writes in their ...
When a female mates with several males, these will compete over the fertilization her eggs. This is an important evolutionary force that has led to the evolution of a diversity of male sexual organ morphologies. This is revealed ...
Plants & Animals
Oct 25, 2012
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(Phys.org)—A new multidisciplinary study on the enigmatic large Horseshoe bat – found widespread throughout South and East Africa – has revealed that instead of just one species as previously believed, the bat is in ...
Plants & Animals
Sep 14, 2012
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Velvet spiders include some of the most beautiful arachnids in Europe and some of the world's most cooperative species. Social species can be very abundant in parts of tropical Africa and Asia with conspicuous colonies dotting ...
Plants & Animals
May 23, 2012
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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 ...
Plants & Animals
Apr 24, 2012
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UC researcher finds that when it comes to hooking up with the opposite sex, genital complexities do matter.
Plants & Animals
Jan 7, 2010
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Female ducks have evolved an intriguing way to avoid becoming impregnated by undesirable but aggressive males endowed with large corkscrew-shaped penises: vaginas with clockwise spirals that thwart oppositely spiraled males.
Plants & Animals
Dec 23, 2009
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