南极中山站邻近区域麦氏贼鸥Catharacta　maccormicki繁殖生态研究

Breeding ecology of the south polar skua (Catharacta maccormicki)in the area near Zhongshan Station, Antarctica

对中国南极中山站附近麦氏贼鸥繁殖种群的产卵、孵化和育雏等繁殖活动进行了系统的观察研究，记录产卵２１枚，育雏１８只，育成７只。第一卵的卵容量常大于第二卵，所需卵化时间通常长于后者，并使第一雏鸟在发育初期便处于有利地位；雏鸟成长常因缺少食物、气候恶劣以及敌害等夭折，尤其第二雏鸟的大量损失，使育成率低，仅为３８．９％。另外，人类活动对本区麦氏贼鸥繁殖习性和繁殖率所产生的影响不可忽视。

The breeding ecology in a small polulation of the south polar suka (Catharactamaccormicki) was studied in the area near Zhongshan Station (China), in Larsemann Hills(69°21'S, 76°00'E), Princess Elizabeth Land, east Antarctica during the 1989/1990 summer. 21 eggs were laid from mid-December to early January, 7 young birds only fledged, andbreeding success in the 13 regulary monitored nests averaged 0. 5 chicks fledged per pair. Thevolume of the first eggs was mostly larger than that of the second eggs. Longer time was usedfor the first egg hatching. Sequenced the first chicks were advangeous in their Perimiry stageof development. The overall survival from eggs laid to chicks fledged was lower as 38. 9%, because of eggs and chicks (particulary the second chicks) were damaged by food scarcity,badweather and invaders. Human activities impact on bird's breeding does happed in this area aswell.