News tagged with reproductive success

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Old males win sex battle

( -- Old roosters can still dominate the sexual pecking order even when their ability to fertilise eggs drastically declines, new Oxford University research has shown.

dateJun 25, 2010 in Plants & Animals
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Do hormones dictate breeding success in birds?

( -- Some animals produce more offspring than others do. Hormones like prolactin and corticosterone can exercise a crucial influence on the behaviour of birds in the breeding season and therefore on their reproductive ...

dateJan 25, 2011 in Plants & Animals
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Orsini's viper: Growth or reproduction?

Orsini's viper, a rare and protected species at risk of extinction in France, has an original reproductive strategy. In alternate years, it switches between reproductive and non-reproductive behavior. This strategy has recently ...

dateNov 28, 2012 in Plants & Animals
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