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Unattractive guppies have better sperm

( -- Scientists studying tropical guppies have discovered that the less colorful and attractive males have better quality sperm, while the attractive fish invest in their appearance at the expense of sperm quality.

dateJun 07, 2010 in Plants & Animals report
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Cuckolded males sing louder

The song of male songbirds is multifaceted and has two main functions: to repel rivals and to attract mates. Females often pay attention to certain features within a song, such as the presence of special syllables, to assess ...

dateAug 23, 2012 in Plants & Animals
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Male seahorses like big mates

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 ...

dateJul 07, 2009 in Plants & Animals
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