News tagged with fertile males
Gene-engineered flies are pest solution
Biology /
Jan 27, 2009 |
5 / 5 (2) |
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For the first time, male flies of a serious agricultural pest, the medfly, have been bred to generate offspring that die whilst they are still embryos. Researchers writing in the open access journal BMC Biology describe the ...
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Spread your sperm the smart way
Jul 09, 2009 |
2.8 / 5 (4) |
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(PhysOrg.com) -- Attractive males release fewer sperm per mating to maximise their chances of producing offspring across a range of females, according to a new paper on the evolution of ejaculation strategies. The findings ...
Inbred bumblebees less successful
Jul 02, 2009 |
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Declining bumblebee populations are at greater risk of inbreeding, which can trigger a downward spiral of further decline. Researchers writing in the open access journal BMC Evolutionary Biology have provided the first proof ...
Female chimps keep the bullies at bay
Biology /
Mar 07, 2007 |
4.7 / 5 (3) |
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Female chimpanzees may have found a fool-proof way to ensure they mate with only the highest ranking males, namely those with important social and physical characteristics that their offspring may inherit, according to a ...
Female choice benefits mothers more than offspring
Oct 22, 2009 |
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The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice. But why do females choose among males? In a new study published ...
Hens change sex behaviour to outfox males
Biology /
May 15, 2007 |
3.8 / 5 (6) |
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Hens solicit sex in the morning in male-dominated groups of chickens to avoid an evening of sexual harassment from amorous cockerels, according to new research.
Male Rivalry Increases when Females at Most Fertile, Say Researchers
Apr 24, 2006 |
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Men become more jealous of dominant males when their female partner is near ovulation, researchers at the University of Liverpool have found.
The sophisticated sex lives of sea squirts
Biology /
Aug 26, 2008 |
3.4 / 5 (9) |
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(PhysOrg.com) -- It may not be pretty, but the humble sea squirt could well be the envy of many: the marine organism never has to worry about contraceptives or IVF.
How female chimps call off the competition
Biology /
Jun 18, 2008 |
4.6 / 5 (9) |
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Female chimps are more concerned with having sex with many different males than finding the strongest mate, according to researchers.
Male factor infertility associated with comorbidities
Nov 09, 2009 |
5 / 5 (1) |
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The December issue of European Urology, the official journal of the European Association of Urology, features an article entitled 'Are Infertile Men Less Healthy than Fertile Men? Results of a Prospective Case-Control Survey ...
Injectable testosterone may provide effective male contraception
May 04, 2009 |
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Researchers in China may have found a method for male contraception that is effective, reversible and without serious short-term adverse effects according to a new study accepted for publication in The Endocrine Society's ...
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