Migration of waterfowl in the East Asian flyway and spatial relationship to HPAI H5N1 outbreaks.
Migration of waterfowl in the East Asian flyway and spatial relationship to HPAI H5N1 outbreaks.
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DOI：
10.1637/8914-043009-reg.1
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发表时间：
2010-03
期刊：
影响因子：
1.4
通讯作者：
Ji W
中科院分区：
文献类型：
--
作者：
Takekawa JY;Newman SH;Xiao X;Prosser DJ;Spragens KA;Palm EC;Yan B;Li T;Lei F;Zhao D;Douglas DC;Muzaffar SB;Ji W
鄱阳湖位于东亚航道内，这是一条水禽迁徙走廊，也包括广东省中国，高致病性禽流感H5N1的震中。该湖是中国最大的淡水湖，也是水禽的重要聚集地；然而，周围的稻田和家禽放牧造成了与野生水鸟的重叠，这一情况有利于禽流感的传播。在鄱阳湖健康的野鸭中发现HPAI H5N1的报道引发了人们对具有弹性的自由放养鸟类传播病毒的可能性的担忧。然而，由于缺乏关于野鸭迁徙生态的信息，野鸭在亚洲HPAI H5N1疫情连接区域中发挥的作用受到阻碍。在2007-08年间，我们在鄱阳湖用卫星发射器标记野鸭，以检查春季迁徙的位置和时间，并确定与HPAI H5N1疫情的任何时空关系。种类包括欧亚水貂(Anas Penelope)、北方针尾(Anas Acuta)、普通青鸟(Anas Crecca)、镰刀蓝(Anas Falcata)、贝加尔蓝(Anas Formosa)、绿头鸭(Anas Platyririnchos)、巨尾蓝嘴鸟(Anas Ququedula)和中国斑嘴鸟(Anas Poecilohyncha)。这些野鸭(不包括绿头鸭和斑嘴鸭)沿着东亚航线沿海岸到达中国北部、蒙古东部和俄罗斯东部的繁殖区。没有一只向西迁徙到青海湖(最大的野生鸟类流行性动物流行的地点)，因此未能证明与中亚航道有任何迁徙联系。一项新开发的布朗桥空间分析表明，在飞行路线上报告的HPAI H5N1疫情与纬度和家禽密度有关，但与核心迁徙走廊或湿地栖息地无关。此外，我们还发现暴发时间和野鸭活动之间存在时间上的不匹配。这些分析依赖于对暴发疫情的完整或有代表性的报告，但通过记录野生水禽的活动，我们展示了更好地为寻求解释和预测禽流感病毒传播的流行病学调查提供信息的生态学知识。
Poyang Lake is situated within the East Asian Flyway, a migratory corridor for waterfowl that also encompasses Guangdong Province, China, the epicenter of highly pathogenic avian influenza (HPAI) H5N1. The lake is the largest freshwater body in China and a significant congregation site for waterfowl; however, surrounding rice fields and poultry grazing have created an overlap with wild waterbirds, a situation conducive to avian influenza transmission. Reports of HPAI H5N1 in healthy wild ducks at Poyang Lake have raised concerns about the potential of resilient free-ranging birds to disseminate the virus. Yet the role wild ducks play in connecting regions of HPAI H5N1 outbreak in Asia is hindered by a lack of information about their migratory ecology. During 2007–08 we marked wild ducks at Poyang Lake with satellite transmitters to examine the location and timing of spring migration and identify any spatiotemporal relationship with HPAI H5N1 outbreaks. Species included the Eurasian wigeon (Anas penelope), northern pintail (Anas acuta), common teal (Anas crecca), falcated teal (Anas falcata), Baikal teal (Anas formosa), mallard (Anas platyrhynchos), garganey (Anas querquedula), and Chinese spotbill (Anas poecilohyncha). These wild ducks (excluding the resident mallard and Chinese spotbill ducks) followed the East Asian Flyway along the coast to breeding areas in northern China, eastern Mongolia, and eastern Russia. None migrated west toward Qinghai Lake (site of the largest wild bird epizootic), thus failing to demonstrate any migratory connection to the Central Asian Flyway. A newly developed Brownian bridge spatial analysis indicated that HPAI H5N1 outbreaks reported in the flyway were related to latitude and poultry density but not to the core migration corridor or to wetland habitats. Also, we found a temporal mismatch between timing of outbreaks and wild duck movements. These analyses depend on complete or representative reporting of outbreaks, but by documenting movements of wild waterfowl, we present ecological knowledge that better informs epidemiological investigations seeking to explain and predict the spread of avian influenza viruses.