Roosters are nicer to their relatives than to other males

Male domestic fowl are less aggressive towards related males than to unrelated males when competing for copulations, according to a new study from Linköping University in Sweden. This finding, which has been published in ...

Fish sperm race for reproductive success

Norwegian researchers show that the sperm of Arctic char, a cold-water fish common to alpine lakes, swim at different speeds in different fluids, depending on whether the fish are dominant or submissive. The finding published ...

Mate-guarding behaviour favours a familiar face

Okayama University researchers confirm the role of mate-guarding in males for blocking the female's visual familiarity with rival males to improve mating success in a medaka fish model.

Bison decapitated, three missing from Spanish reserve

Spanish police were on Tuesday investigating the decapitation of a European bison and the disappearance of three others from a nature reserve which was set to start a breeding programme for the species.

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