The louder the voice, the less sperm

Research on male monkeys showed that the loudest, the deepest, produced lesser sperm and had lower fertilization efficiency.

The bigger the monkey has the sound, the lower the sperm

According to the IB Times, despite being one of the smallest species of primates, weighs only 7kg, the monkey monkey (Alouatta) often howls to attract mates. However, scientific research has shown that monkeys howled despite attracting many partners but are less effective in maintaining the race, according to Darwin's sexual selection theory.

"Although this theory was initiated during Darwin's time, this is the first time that humans have demonstrated the trade-off between mating before mating and the effect of fertilization after mating," said Professor Leslie Knapp, chairman. Anthropology, University of Utah, USA, said.

A group of macabre monkeys together howled to call their partners.(Photo: Cambridge University).

"Our research shows that Darwin was right when he said that monkey's howling plays an important role in reproduction."

Jacob Dunn, of the University of Cambridge, added: "We have compelling evidence that the macaque monkeys have a large soundstage with less sperm . This is the first evidence of a trade-off between speech and fine quality. coincides with species ".

The howling monkeys make to make them look bigger than they really are. The bigger the bones with the bone (between the chin and cartilage), the louder the howling. This study was published in the journal Current Biology last week.

The work was conducted by an international British, Austrian and American research team. They collected testicular size data for 66 monkeys with other monkeys, using 3D laser scanning technology to analyze the size of 250 bones and detect, some bones are 10 times larger than other bones. .

" Investing in the development of the larynx and loud howls can be too costly, making them not enough energy to invest in testicles , " Dunn said.