News tagged with reproductive success

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Unattractive guppies have better sperm

(PhysOrg.com) -- 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 ...

Jun 07, 2010 report
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Key to evolutionary fitness: Cut the calories

Charles Darwin and his contemporaries postulated that food consumption in birds and mammals was limited by resource levels, that is, animals would eat as much as they could while food was plentiful and produce as many offspring ...

Jul 01, 2009
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How the daisy got its spots... and why

Dark spots on flower petals are common across many angiosperm plant families and occur on flowers such as some lilies, orchids, and daisies. Much research has been done on the physiological and behavioral ...

Dec 18, 2009
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