經過七年研究虎鯨糞便及觀察幼鯨，發現三分之二的虎鯨都懷孕失敗，並相信是食物短缺令牠們營養不良，導致懷孕不穩定。
over a 7 years study of ocras’ excrement collected at sea, the team found out more than two-thirds of the orca pregnancies failed. the researchers believe this is because the lack of food and nutritional stress.
