(Phys.org) —In many species, females frequently mate with more than one male. Researchers at the University of Veterinary Medicine in Vienna (Vetmeduni Vienna) aimed to find out why. In experiments on wild house mice, they ...
Plants & Animals
Aug 30, 2013
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University of East Anglia scientists have revealed how females select the 'right' sperm to fertilize their eggs when faced with the risk of being fertilized by wrong sperm from a different species.
Evolution
Aug 16, 2013
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Researchers at the University of Exeter found that older male burying beetles make better fathers than their younger counterparts. The study found that mature males, who had little chance of reproducing again, invested more ...
Plants & Animals
Jun 18, 2013
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Researchers at the University of Exeter and the University of Hamburg investigated how personality is transferred between generations. They found that foster parents have a greater influence on the personalities of fostered ...
Plants & Animals
Jun 4, 2013
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In the bird world, male and female blue tits are hard to distinguish for the human observer. However, in the UV-range, visible to birds, the male is much more colourful. A closer look at the monogamous mating system of these ...
Evolution
Apr 3, 2013
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The mating success of male butterflies is often lower if they are inbred. But how do female butterflies know which males to avoid? New research reveals that inbred male butterflies produce significantly less sex pheromones, ...
Plants & Animals
Mar 5, 2013
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Having elder siblings decreases mortality risk in childhood, but same-sex elder siblings are associated with lower marriage rates and fewer children for their younger siblings in adulthood, according to the results of a long-term ...
Social Sciences
Nov 22, 2012
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(Phys.org)—Researchers from Britain's National Oceanography Centre, Southampton, working in the Antarctic have discovered that a species of mollusk, Lissarca miliaris, changes from male to female as it grows older. As the ...
Previously, Daiqin Li and colleagues at the National University of Singapore found that the male orb web spider loses its sex organ, called a palp, due to it breaking off during sex because it allowed the male to continue ...
Females influence the gender of their offspring so they inherit either their mother's or grandfather's qualities. 'High-quality' females – those which produce more offspring – are more likely to have daughters. ...
Plants & Animals
Jan 9, 2012
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