中华秋沙鸭(Mergus squamatus)在江西省的越冬分布及种群数量调查

2006年12月,对江西省境内三龙镇西河段、浮梁县昌江段、婺源县乐安江段、弋阳县清湖乡信江段、修水县修水段、吉安县永和镇赣江段和万安县窑头镇赣江段等14个河段和地点进行了中华秋沙鸭越冬分布地和数量调查,共记录到中华秋沙鸭82只,31雄51雌或幼.其中弋阳和婺源为有记载分布地;浮梁县昌江和修水县修水段为首次发现,且数量较大,分别达到22和23只.本次调查发现,中华秋沙鸭越冬栖息地环境特征具有明显共性,多选择生活在水质好、深度较浅、水流较急、河中央有砾石兀立或砾石漫滩的宽阔河流中.此外,调查结果也显示,中华秋沙鸭在江西省适合栖息的江段和越冬种群数量均应远多于此次的调查,江西省是中华秋沙鸭在我国主要的越冬分布区之一.

Wintering distribution and population size of scaly-sided Merganser Mergus squamatus in Jiangxi Province

From 19 to 30 Dec 2006,Xihe stretch within Sanlong town,Changjiang reaches within Fuliang county,leanjiang reaches within Wuyuan county,Xinjiang stretch within Yiyang county,Xiushui reaches within Xiushui county,Ganjiang reaches within Yonghe town and Ganjiang reaches within Yaotou town have been surveyed to study the wintering distribution and population size of scaly-sided Merganser in Jiangxi Province.82 scaly-sided Mergansers have been observed,31 scaly-sided Mergansers are male,51 are female or immature.Yiyang and Wuyuan are recorded wintering sites.Fuliang and Xiushui are reported firstly,the number of scaly-sided Merganser reached to 22 and 23 respectively.The wintering habitats characters apparently exist common ground.benefiting reaches must exceed these reaches and sites.The population size of the scaly-sided Merganser wintering in Jiangxi Province must far exceed the number that be observed in this study.Jiangxi Province is considered the one of main wintering sites of the scaly-sided Merganser in China.