圈养丹顶鹤与白枕鹤杂交繁育

我园一只雄性丹顶鹤与一只雌性白枕鹤于2001年开始自然配对产蛋，3年共产51枚，经人工孵化育雏，目前存活15只。杂种鹤在第4周后进入快速增长阶段，在12周达到最高峰，16周后增长速度明显下降，18周后部分指标停止增长。外观上，出生至3月龄时，幼鹤整体颜色都呈黄褐色，以后变化基本一致。目前，2001及2002年存活杂种鹤颜色以白色为主，夹杂着灰色羽毛。

Crossbreeding of Captive Red-crowned Crane and White-naped Crane

One male red-crowned crane and one white-naped crane fell in love and mated naturally in 2001.The white-naped crane have laid 51 eggs in 3 years. 15 young cranes were survived under artificial incubation and rearing. The young cranes grew quickly after 4 weeks old and came to peak about 12 weeks old then went down quickly after 16 weeks old. Some indices stopped growing at 18 weeks old. The young cranes' appearance were yellowish-brown until 3 months old and then changed. Now,the feather of survived crossbred cranes born in 2001and 2002 are white mixed with little grey in color.