The Current Status of Wintering Population of Whooper Swan (Cygnus cygnus) at Sanmenxia Reservoir Region, China
A highly pathogenic avian influenza (HPAI) H5N1 infected by whooper swans (Cygnus cygnus) and other wild ducks outbroke in early 2015 at Sanmenxia Reservoir Region,China.In order to strengthen the conservation on the Whooper Swan,the data of wintering whooper swans population surveys in 2010 and 2014 were summarized.The fidelity on wintering sites based on the color making resightings of whooper swans was analyzed.According to survey results,the numbers of wintering whooper swans population at Sanmenxia increased significantly in recent years,especially reached 6 317 individuals in 2014 (Table 1),and the population numbers were peak from middle of December to January,and departed Sanmenxia in later of March (Table 2).Whooper swans also showed the better fidelity to Sanmenxia wintering sites,and the swans also often moved within the Sanmenxia Reservoir Region (Appendix 1 and Fig.1).In additional,a total of 119 individuals resighted at Sanmenxia were confirmed from 19 lakes at the northern and central Mongolia (Appendix 2 and Fig.1).Many whooper swans at other wintering site were attracted here,as a result of the better water quality through the diverting Yellow River to Sanmenxia Reservoir and abundant corn food raised by local people,so it is assumed that the death of whooper swans may be related to higher population density.Finally,it is suggested that the local government should take effective measures such as establishing a new suitable habitat,to promote population dispersal of whooper swans.
NETL
NSTL
万方数据
维普
