The fierce battles of rutting stags may be the most famous symbols of males competing over females in the animal kingdom. But it turns out the stags don't have things all their own way.
Plants & Animals
Oct 19, 2011
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(PhysOrg.com) -- University of Florida researchers, in collaboration with the U.S. Department of Agriculture, report that a single dose of an immunocontraceptive vaccine controls fertility over multiple years in adult female ...
Plants & Animals
Sep 30, 2011
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New research finds that even though hens aren't terribly picky about their mates, they are picky about whose sperm makes it to the egg.
Plants & Animals
Aug 25, 2011
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Fish with a placenta struggle to adapt to rapid changes in the food supply. They probably evolved in a stable, food-rich environment. As ecosystems change under the influence of humans, they are experiencing greater difficulty ...
Ecology
Jul 11, 2011
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Hormonal contraceptives change the ways captive ring-tailed lemurs relate to one another both socially and sexually, according to a Duke University study that combined analyses of hormones, genes, scent chemicals and behavior.
Plants & Animals
Jul 27, 2010
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Contrary to predictions, males of high genetic quality are not very successful when it comes to fertilizing eggs. A new study on seed beetles by Swedish and Danish scientists Göran Arnqvist and Trine Bilde shows that when ...
Plants & Animals
Jun 25, 2009
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Living with a female of its species can extend the reproductive life of a male mouse by a dramatic 20 percent, according to a study reported at the online site of the journal Biology of Reproduction.
Jan 22, 2009
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