青海湖鸬鹚繁殖成功率初报

A Preliminary Report on Reproductive Success of Cormorants (Phalacrocorax carbo) at Qinghai Lake

摘要: 2000年3-8月对青海湖西山鸬鹚岛鸬鹚(Phalacrocorax carbo)不同繁殖阶段的成功率做了初步观察。鸬鹚卵的窝卵数为3.47枚，孵化率为37.9%，雏鸟成活率为61.1%，繁殖成功率为23.2%。孵化期的前3 d，鸬鹚巢的损失率高达36.1%；育雏期前10 d雏鸟损失率为25%。这些数据可看作鸬鹚种群-青海湖湿地生态系统的一个重要组分──动态监测的起始数据之一，可在未来进一步的比较分析中得到应用。

Abstract: The success of different stages of reproduction in cormorants (Phalacrocorax carbo) was followed at Luci Island in Qinghai Lake in the breeding season from March to August 2000.The clutch size was 3.5;hatch rate,survival rate of nestlings,and total rate of reproductive success was 37.9%,61.1%,and 23.2%,respectively.The loss rate was 36.1% for nests in first 3 days of incubation,and 25% for nestlings in the first 10 days.These data may be viewed as part of the baseline for long-term monitoring changes in the bird population,which is an important element of the wetland ecosystem.