News tagged with success

Do hormones dictate breeding success in birds?

(PhysOrg.com) -- 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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Old males win sex battle

(PhysOrg.com) -- 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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