The North American beaver (Castor canadensis) was introduced in 1946 from Canada to Isla Grande de Tierra del Fuego to develop a fur industry. Their expansion to most of the habitats of Tierra del Fuego and their presence on the continent, moved Argentina and Chile to test their eradication. The objective of this paper is to analyse a pilot eradication test and determine which variables are associated with the capture success of beavers in a small area of the Fuegian forest. The pilot was conducted in the Corazón de la Isla reserve, Tierra del Fuego, Argentina, during April and May 2014, by three groups of trappers, using body-grip traps and snares. The capture success was modelled with different variables. A total of 115 individuals were captured after 590 and 265 body-grip and snare trapping-nights, respectively, with an overall efficiency of 13.5%. Using body-grip traps and placing traps in slides or burrows would increase trapping efficiency. This experience allowed us to evaluate techniques and generate recommendations for future beaver eradication trials on a larger scale: (a) the need to improve the data collection system through digital technology and georeferencing the location of operations, (b) the importance of the type of trap used according to the specific sites of the colony, (c) test alternative trapping strategies to reduce the eventual “learning” of animals, (d) drive the paradigm of hunters from yield oriented to eradication objectives and (e) ensure the political sustainability of the wider program.

北美海狸（蓖麻加拿大）于1946年从加拿大引入到大岛地带（Isla Grande de Tierra del Fuego），以发展皮草业。它们扩展到火地岛的大部分栖息地，并在非洲大陆上占有一席之地，这促使阿根廷和智利进行了根除的试验。本文的目的是分析一项初步的根除试验，并确定哪些变量与在Fuegian森林的小区域捕获海狸的成功相关。该试点活动于2014年4月至5月在阿根廷火地岛的Corazónde la Isla保护区由三组诱捕器进行了诱捕，使用了手握式诱捕器和圈套器。捕获成功使用不同的变量进行建模。在分别进行590次和265次身体抓握和圈套陷阱之夜后，总共捕获了115个人，总效率为13.5％。使用身体抓地力陷阱并将陷阱放置在滑梯或洞穴中会提高陷阱效率。这项经验使我们能够评估技术并为大规模的海狸消灭试验提供建议：（a）通过数字技术和对地理位置进行地理定位以改善数据收集系统的需求；（b）类型的重要性根据殖民地的特定地点使用的诱捕器，（c）测试替代性诱捕策略，以减少最终对动物的“学习”，（d）将猎人的范式从以产量为目标转向消灭目标，以及（e）确保政治可持续性更广泛的计划。