News tagged with sexual selection

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Ecological speciation by sexual selection on good genes: Is speciation adaptive?

Biology / Ecology

created 15 hours ago | popularity 5 / 5 (1) | comments 0

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 ...


Studies suggest males have more personality

Studies suggest males have more personality

Biology / Plants & Animals

created Nov 18, 2009 | popularity 3.7 / 5 (9) | comments 3

(PhysOrg.com) -- 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 ...


For fish, bigger doesn’t always mean healthier

Biology / Plants & Animals

created Nov 17, 2009 | popularity not rated yet | comments 0

(PhysOrg.com) -- Female smallmouth bass tend to prefer bigger male mates, but bigger doesn’t necessarily mean healthier. That’s the finding of a new study in the latest issue of Physiological and Biochemical Zoology that i ...


Why do animals, especially males, have so many different colors?

Why do animals, especially males, have so many different colors?

Biology / Plants & Animals

created Oct 31, 2009 | popularity 4.5 / 5 (6) | comments 2

(PhysOrg.com) -- In new research, UCLA scientists claim that "secondary sexual traits" like coloring may let animals know which species to avoid fighting.


Male seahorses like big mates

Biology / Plants & Animals

created Jul 07, 2009 | popularity not rated yet | comments 0

Male seahorses have a clear agenda when it comes to selecting a mating partner: to increase their reproductive success. By being choosy and preferring large females, they are likely to have more and bigger eggs, as well as ...


Why do we choose our mates? Ask Charles Darwin, prof says

Biology / Evolution

created Jun 16, 2009 | popularity 3.1 / 5 (9) | comments 5

Charles Darwin wrote about it 150 years ago: animals don't pick their mates by pure chance - it's a process that is deliberate and involves numerous factors. After decades of examining his work, experts agree that he pretty ...


Evolution of human sex roles more complex than described by universal theory

Biology / Evolution

created Apr 24, 2009 | popularity 3.6 / 5 (9) | comments 6

A new study challenges long-standing expectations that men are promiscuous and women tend to be more particular when it comes to choosing a mate. The research, published by Cell Press in the April issue of the journal Trends in ...


Dung Beetle

Sexual Encounters of the Third Kind: Darwin's Beetles Still Producing Surprises

Biology /

created Feb 06, 2009 | popularity 4.9 / 5 (10) | comments 1

(PhysOrg.com) -- On the eve of Charles Darwin’s 200th birthday, researchers at the University of New Mexico and University of Montana report a new twist in sexual selection theory - the realm of evolutionary ...


Researchers Discover Size Does Matter For NZ Insects

Researchers Discover Size Does Matter For NZ Insects

Biology /

created Oct 28, 2008 | popularity 4.3 / 5 (4) | comments 0

(PhysOrg.com) -- After a night on the prowl, locating a willing mate holds the promise of a private cuddle, a whole day of canoodling, and 14-15 opportunities to “make hay.” For the giant weta of New Zealand, ...


Pair of Giant Weta

Lightweight and long-legged males go the distance for sex

Biology /

created Sep 05, 2008 | popularity 4.2 / 5 (6) | comments 0

Finding a mate can take considerable legwork as recently illustrated by the flightless and nocturnal Cook Strait giant weta Deinacrida rugosa. This cricket relative is found in New Zealand and is one of the ...