丹顶鹤与白枕鹤的领域比较

有７种濒危鹤类受到现代人的威胁［２０］，丹顶鹤（Ｇｒｕｓｊａｐｏｎｅｎｓｉｓ）和白枕鹤（Ｇｒｕｓｖｉｐｉｏ）是其中两种，分别为我国的Ⅰ、Ⅱ级保护动物。在中国丹顶鹤主要在黑龙江省的乌裕尔河下游和三江平原等地繁殖，数量在４８２～５０２之间［７］。吉林省的向海也有４０余只繁殖鹤［８，９］。它们在长江中下游的江苏盐城、高邮湖、洪泽湖，安徽省的城东湖、石臼湖、菜子湖越冬［５］。白枕鹤繁殖区在中国东北的乌裕尔河下游、向海、达里诺尔湖以及乌苏里江以东俄罗斯的沿海边区［２０］。我国已知的繁殖区内数量不多［１］，…

A Comparative Study on Territories of White-Naped Crane and Red-Crowned Crane

The territories and territrial behavior of White-naped Crane and Red-crowned Crane were studied in Rindian County of Heilongjiang province from March to May in 1986-1988.Eight territories of White-naped crane and six of Red-crowned Crane were investigated.The results show that two species have successtively occupied the same territory for many years.The maximum size of occupied territory by Red-crowned Crane is 4.0 km 2 with the average of 3.65 km 2 and by White-naped crane is 10.7 km 2 with the average of 7 km 2.During most period of breeding, the size of territories of two species were gradually reduced to less than 1.5 km 2 until nesting period ,The area of territories of White-naped Crane with fixed foraging crop field is smaller than that of the territories without crop field.