News tagged with dominant males
Pregnant gelada monkeys abort when new male enters group
(PhysOrg.com) -- Pregnant female geladas show an unusually high rate of miscarriage the day after the dominant male in their group is replaced by a new male, a new University of Michigan study indicates.
Feb 23, 2012 |
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Bonobos' unusual success story
Mate competition by males over females is common in many animal species. During mating season male testosterone levels rise, resulting in an increase in aggressive behavior and masculine features. Male bonobos, ...
Jan 23, 2012 |
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Paternity of subordinates raises cooperative effort in cichlids
Cichlid male nannies help out, especially if they've been sneaking.
Oct 12, 2011 |
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Fantastic Mrs. Fox -- mother knows best for urban fox families
In urban fox families, mothers determine which cubs get to stay and which must leave while fathers have little say in the matter, new research by biologists at the University of Bristol has found.
Jul 20, 2011 |
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High social rank comes at a price, researchers find
Being at the very top of a social hierarchy may be more costly than previously thought, according to a new study of wild baboons led by a Princeton University ecologist.
Other Sciences / Social Sciences
Jul 14, 2011 |
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Male African cichlid fish go from 'zero to 60' when mating calls, researchers find (w/ video)
(PhysOrg.com) -- In African cichlid fish society, only the dominant male reproduces. But Stanford researchers have found that if the dominant male disappears, a subordinate cichlid can rise to the procreative ...
Jul 14, 2011 |
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Birdsong independent of brain size
(PhysOrg.com) -- The brains of all vertebrates display gender-related differences. In songbirds, for example, the size of the brain areas that control their singing behaviour could be linked to the size of ...
Jun 13, 2011 |
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Female deer confirm bigger is not always better when choosing a mate
Female deer do not always choose the bigger and dominant males to mate with, scientists from Queen Mary, University of London and Hartpury College have found.
Apr 06, 2011 |
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Bullying alters brain chemistry, leads to anxiety
(PhysOrg.com) -- Being low mouse on the totem pole is tough on murine self-esteem. It turns out it has measurable effects on brain chemistry, too, according to recent experiments at Rockefeller University. ...
Medicine & Health / Psychology & Psychiatry
Mar 28, 2011 |
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The double-edged sword of dominance
A study of chimpanzees has revealed that dominant animals with higher testosterone levels tend to suffer from an increased burden of parasites. Researchers writing in BioMed Central's open access journal BioPsychoSocial Me ...
Dec 09, 2010 |
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Ugly Betty forced to aim for Average Joe
Less-pretty female house sparrows tend to lower their aim when selecting a mate. Addressing the lack of studies on condition-dependency of female mate choice, researchers writing in the open access journal ...
Aug 26, 2010 |
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Are female mountain goats sexually conflicted over size of mate?
Mountain goats are no exception to the general rule among mammals that larger males sire more and healthier offspring. But University of Alberta researcher David Coltman has found a genetic quirk that might make female mountain ...
Nov 17, 2009 |
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Ladyboy lizards use transvestite trickery: researchers
Young male lizards in South Africa imitate females to fool aggressive older males into leaving them alone, in an example of transvestism in the natural world, researchers have found.
Mar 03, 2009 |
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