印度Ladakh地区斑头雁的数量、种群结构和栖息地利用

摘要

于1998、2000和2002年在印度的Ladakh地区进行了野外考察以研究斑头雁的繁殖行为和种群大小.Ladakh地区的斑头雁集小群在淡水湖泊中的小岛上进行繁殖,不在树上和悬崖上繁殖.5月份开始产卵.群内孵化的同步性较低.盐水湖岸上没有观察到进行繁殖或带有幼雏的斑头雁.作者所调查的Ladakh地区有350-1000只斑头雁,该物种的数量满足了Ramsar公约的有关规定,建议将该地区列为国际重要地区[动物学报50(5):738-744,2004].%In 1998, 2000 and 2002 expeditions were conducted in Ladakh, India, to study breeding behaviour and population size of bar-headed geese Anser indicus. Bar-headed geese in Ladakh bred in small colonies on islets in fresh water lakes but not in trees and apparently not on cliffs. Egg laying started in May. Hatching synchrony within colonies was low. Breeding bar-headed geese or geese with juveniles were not observed on the shores of saline lakes. The area of Ladakh that we surveyed contained between 350 and 1 000 individuals, which makes Lake Tsomoriri (4 650 m altitude)meet the Ramsar Convention criteria for this goose species. We propose this area to be listed as such [ Acta Zoologica Sinica 50 (5): 738-744, 2004].