Orangutan females prefer dominant, cheek-padded males

Unlike most mammals, mature male orangutans exhibit different facial characteristics: some develop large "cheek pads" on their faces; other males do not. A team of researchers studied the difference in reproductive success ...

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 ...

Pheromones and social status: Macho mice smell better

Male house mice produce several pheromones, which are volatile and non-volatile chemical signals that have potent effects on the reproductive physiology and behavior of female mice. A recent study conducted by researchers ...

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