红嘴鸥在贝加尔湖的分布和繁殖

Distribution and Breeding of Black-headed Gull in Lake Baikal

在对贝加尔湖地区红嘴鸥Larus ridibundus的数量分布及繁殖习性的现场考察中发现,贝加尔湖及其附近广阔的湿地是红嘴鸥繁殖的理想场所,每年至少有50000对红嘴鸥在当地繁殖;红嘴鸥为半早成鸟;红嘴鸥的筑巢、产卵、孵化是在一定的时间范围内先后不一进行的。这次考察为进一步揭示红嘴鸥的繁殖生态和促进对红嘴鸥及其鸟类的保护提供了一些有益的基础资料。

During the investigation of black-headed gulls＇ breeding ground in Lake Baikal, it has been found：Lake Baikal and surrounding wetland is the perfect ground of black-headed gulls＇ distribution and breeding. Every year, more than 50 000 pairs of them breed there. Black-headed gull is semi-precocious bird. They do not simultaneously lay eggs and hatch, so the reach breeding ground in different times. This investigation obtains some valuable data about black-headed gulls＇breeding ecology and bird protection.