Ralls K, Brugger K, Ballou J
Science. 1979 Nov 30;206(4422):1101-3. doi: 10.1126/science.493997.
Juvenile mortality of inbred young was higher than that of noninbred young in 15 of 16 species of captive ungulates. In 19 of 25 individual females, belonging to ten species, a larger percentage of young died when the female was mated to a related male than when she was mated to an unrelated male.
在16种圈养有蹄类动物中，15种杂交幼崽的死亡率高于非杂交幼崽。在属于10个物种的25只雌性个体中，有19只雌性与近亲雄性交配时，幼崽的死亡比例高于与非近亲雄性交配时。
