%0 Journal Article
%T Flock of Black-necked Crane Wintering at Napahai Nature Reserve,China<br>云南省纳帕海自然保护区越冬黑颈鹤的集群特征
%A LIU Qiang
%A YANG Xiao-jun
%A ZHU Jian-guo
%A ZHAO Jian-lin
%A YU Hong-zhong
%A <br>刘强
%A 杨晓君
%A 朱建国
%A 赵健林
%A 余红忠
%J 动物学研究
%D 2008
%I Chinese Academy of Sciences
%X From October 2004 to May 2005, flock size and composition of wintering black-necked cranes(Grus nigricollis) were studied using spot scanning technique at Napahai Nature Reserve in Yunnan province.At night, the mean wintering population size was 67.9(16-157, n=17).Composed by common crane(Grus grus) or not, roost cranes were divided into sing-species flock and mixed-species flock.The numbers of crane in sing-species flock were 65.3% of total black-necked cranes.In the day, feeding flocks were classified into three types:family group comprised of breeding pair and their offspring ranging between two to four;sub-adult flock composed mainly by sub-adults ranging between three to 65 with an average size of 16.1(n=1017);special flock composed by single cranes.Black-necked crane flocks were affected by season, temperature, breeding status, food abundance and availability, and their sizes changed significantly in daytime or between different months(P=0.000<0.05).After family breakup happened in late March, Juveniles were drove away by their parents and then they got together to join the sub-adult flocks.
%K Black-necked Crane
%K Winter
%K Flock characteristics
%K Family breakup<br>黑颈鹤
%K 越冬期
%K 集群特征
%K 家庭解体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=7C502F1A6798ACE1B8C57E291C48C7F1&aid=3D703ED5093F882B616B7C4A1F17E2A8&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=94C357A881DFC066&sid=4AB4178709047BE3&eid=A3F93694B058F76C&journal_id=0254-5853&journal_name=动物学研究&referenced_num=3&reference_num=36