Migration Routes and Stopover Sites of Upland Geese Chloephaga Picta in South America
Migration Routes and Stopover Sites of Upland Geese Chloephaga Picta in South America
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南美陆雁迁徙路线及停歇地
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Pablo Rojas
中科院分区：
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作者：
J. Pedrana;K. Pütz;L. Bernad;J. P. S. Pon;Antonella Gorosábel;S. Muñoz;J. Isacch;Ricardo Matus;Olivia Blank;Benno Lüthi;M. Lunardelli;Pablo Rojas
高山鹅(Chloephaga Picta Picta)是南美洲的一种迁徙物种，9月至4月在巴塔哥尼亚(阿根廷和智利)繁殖，5月至9月在阿根廷潘帕斯南部越冬。尽管这两个国家都有一些保护措施，但这一物种仍然受到迫害，大量物种被不受管制的狩猎杀死。因此，准确了解它们的迁徙路线对于确保全年保护必要的资源和地点至关重要。我们在成年高地鹅身上部署了五个微型卫星发射器，以收集它们迁徙路线上的繁殖、越冬和中途停留地点的数据。我们的目标是通过核密度分析确定越冬和繁殖地的重要区域，并将迁徙路线沿线的这些地点与保护区进行匹配。被跟踪的鸟类表现出不同的迁徙路线，到达不同的繁殖地。两个人从布宜诺斯艾利斯省的越冬地前往巴塔哥尼亚南部的假定繁殖区。然而，我们也发现了与巴塔哥尼亚北部另一只鸟不同的中途停留地点，这与之前假设的不同，并且有证据表明一些高地雁不是大规模迁徙的。我们的结果突出了陆地雁迁徙行为的相当大的可塑性。这项研究是确定沿高地大雁飞行路线的重要中途停留地点的重要的第一步，它也突出了沿大多数迁徙路线缺乏受保护的栖息地。
The Upland Goose (Chloephaga picta picta) is a migratory species of South America, which breeds from September to April in Patagonia (Argentina and Chile) and winters from May to September in the southern Pampas (Argentina). Despite some protection in both countries, this species is still persecuted and large numbers are killed by unregulated hunting. Therefore, precise knowledge of their migratory routes is vital to ensure protection of necessary resources and sites throughout the year. We deployed five miniaturised satellite transmitters on adult Upland Geese to gather data about breeding, wintering and stopover sites all along their migratory routes. We aimed to identify important areas in the wintering and breeding grounds through kernel density analyses, and to match these sites along the migration routes with protected areas. Tracked birds exhibited different migration routes and reached different breeding grounds. Two individuals travelled from their wintering grounds in Buenos Aires province to their presumed breeding areas in southern Patagonia. However, we also found different stopover sites from another bird in northern Patagonia, from the ones postulated before, and evidence that some Upland Geese are not large-scale migrants. Our results highlight a considerable amount of plasticity in Upland Geese migratory behaviour. This study represents an essential first step towards identifying important stopover sites along the Upland Geese flyways and it also highlights the lack of protected habitats along most of their migration routes.