Elephants are developing so as not to grow their kittens after years of hunting and being killed by hunters, the research reveals.
Nearly 90 percent of African elephants in the Gorambosa National Park of Mozambique were slaughtered for their ivory to finance weapons in the country's civil war.
But about a third of the females – the generation born after the war ended in 1992 – have not developed dialects.
Men were larger and heavier male elephants, but as hunting increased, hunters began to focus on women.
Joyce Paul, scientific director of a non-profit organization called ElephantVoices, told National Geographic: "With time, with the population at an older age, you begin to get that higher rate of tuskless females."
Other countries have also seen a change in the number of elephants growing in the wheat.
In South Africa 98% of the 174 females in the National Park Edfu Phil did not report the growth of fangs in the early 2000s.
Puqing also causes the size of pimples to drop in some heavily trafficked areas, such as South Kenya.
Scientists say that elephants with this disability may change how they behave.
Fangs are used to dig water or get bark for food, so mammals may be traveling further afield to find and survive.
But researchers say changes in the way live elephants can have greater impacts on ecosystems around them.
"All these changes in behavior or all of them can cause changes in the distribution of elephants beyond the landscape, and these biggest changes have implications for the rest of the ecosystem," said Ryan Long, a behavioral ecologist at the University of Idaho.
The number of tuskless elephants pointed to the continuous impact of humans on animals.
Read more: www.nationalgeog …