Birds with high levels of stress hormones have the highest mating success and offer better parental care to their brood, according to new biology research at Queen's University.
Jun 14, 2011
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Birds do it. Bees do it. Fish, lobsters, frogs and lizards do it, too. But when it comes to securing a mate in the animal world, variety is literally the spice of life.
May 25, 2011
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(PhysOrg.com) -- For insects, as for humans, mating can involve complicated interactions between males and females, with each partner engaging in rituals or behaviors that influence the other.
Feb 23, 2011
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Researchers at Columbia University Medical Center have discovered that the skeleton acts as a regulator of fertility in male mice through a hormone released by bone, known as osteocalcin.
Feb 17, 2011
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(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 ...
Jan 25, 2011
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(PhysOrg.com) -- Female dolphins who have help from their female friends are far more successful as mothers than those without such help, according to a landmark new study.
Nov 01, 2010
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Does the environment encountered early in life have permanent and predictable long-term effects in adulthood? Such effects have been reported in numerous organisms, including humans.
Oct 21, 2010
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(PhysOrg.com) -- Success makes sexy - this does not only apply to human beings, but also to various animals. Male bonobos appear to benefit from this phenomenon as well.
Sep 01, 2010
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University of California, Riverside biologists working on guppies - small freshwater fish that have been the subject of long-term studies - report that rapid growth responses to increased food availability ...
Jul 20, 2010
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Female baboons that maintain closer ties with other members of their troop live substantially longer than do those whose social bonds are less stable, a recent study has found. The researchers say that the ...
Jul 01, 2010
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(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.
Jun 25, 2010
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The reproductive success of both men and women is influenced by our personality traits, according to new research from the University of Sheffield.
Jun 08, 2010
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(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
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A field study of the relationship between testosterone and natural selection in an American songbird, the dark-eyed junco, has defied some expectations and confirmed others.
May 04, 2010
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The vocalisations or 'groans' of male fallow deer provide rivals and potential mates with an honest account of the emitting animal's competitive abilities. A study, published in the open access journal BMC Biology, descri ...
Apr 09, 2010
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