No kidding around when it comes to the grandchildren

时间:2019-03-07 04:07:08166网络整理admin

NANNY goats dramatically control the sex ratio of their offspring, which allows these wily creatures to maximise the number of their grandkids. Steeve Côté and Marco Festa-Bianchet at the University of Sherbrooke in Quebec monitored goats in the Rocky Mountains. They found that young females had sons 30 per cent of the time, while in older goats this jumped to 75 per cent (Behavioral Ecology and Sociobiology, vol 49, p 260). Sons can theoretically produce more offspring than daughters,