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When management meets science: adaptive analysis for the optimization of the eradication of the Northern raccoon ( Procyon lotor )
Biological Invasions ( IF 2.9 ) Pub Date : 2020-07-21 , DOI: 10.1007/s10530-020-02313-6
Maria Vittoria Mazzamuto , M. Panzeri , F. Bisi , L. A. Wauters , D. Preatoni , A. Martinoli

The EU Regulation no.1143/2014 on invasive species requires the EU Member States to respond promptly and efficiently in eradicating the invasive alien species listed as species of Union concern. The Northern raccoon (Procyon lotor) was introduced in Northern Italy along the river Adda and we carried out its eradication campaign between 2016 and 2019. We used an integrated approach of camera traps and live traps. A standardized approach to the camera trap survey (2904 camera trap-nights) revealed that the detectability of raccoons (0.27 ± 0.07 SD) increased in the proximity of the river and their occupancy (0.15 ± 0.09 SD) was higher in urban areas. These results allowed us to increase the trapping success whilst reducing the effort. During the captures, systematic collection of catch and effort data allowed to estimate population size (65 ± 7.8 raccoons) and thus to have a continuous update on how far the campaign was from the complete eradication of the species, allowing to adjust the trapping effort accordingly. We captured 69 raccoons (7279 cage trap nights) thanks to both systematic trapping and opportunistic activation of traps following stakeholders’ reports. Stakeholders supported the campaign and some of them played an important role in reporting sightings, signs, and allowing access to their private land. Camera trap data also allowed us to make a Rapid Eradication Assessment that estimated an eradication probability of 99% after 6 months without detections. We finally give indications for future control campaigns on the species to increase removal success, reducing the effort.



中文翻译:

当管理与科学相遇时:自适应分析,以优化铲除北浣熊(Procyon lotor)

欧盟关于入侵物种的第1143/2014号法规要求欧盟成员国迅速有效地消除被列为联盟关注物种的入侵外来物种。北方浣熊(Procyon lotor)是在意大利北部沿阿达河引入的,我们在2016年至2019年之间进行了根除运动。我们采用了照相机陷阱和活物陷阱的综合方法。相机陷阱调查的标准化方法(2904个相机陷阱夜)表明,河附近的浣熊的可检测性(0.27±0.07 SD)提高了,城市地区的浣熊占有率更高(0.15±0.09 SD)。这些结果使我们能够在减少工作量的同时增加诱捕成功率。在捕获过程中,系统收集捕捞量和努力量数据可以估算种群数量(65±7.8头浣熊),从而可以连续更新战役与彻底消灭物种的距离,从而相应地调整捕捞量。由于有系统的诱捕和利益相关者报告后的机会性诱捕,我们捕获了69只浣熊(7279个笼子陷阱之夜)。利益相关者支持该运动,其中一些人在报告目击,标志并允许进入其私人土地方面发挥了重要作用。相机陷阱数据还使我们能够进行快速消灭评估,该评估在6个月内没有检测到的情况下估计消灭率为99%。最后,我们为将来对该物种进行控制运动提供了指示,以提高清除成功率,减少工作量。相机陷阱数据还使我们能够进行快速消灭评估,该评估在6个月内没有检测到的情况下估计消灭率为99%。最后,我们为将来在该物种上开展控制活动提供了指示,以提高清除成功率,减少工作量。相机陷阱数据还使我们能够进行快速消灭评估,该评估在6个月内没有检测到的情况下估计消灭率为99%。最后,我们为将来对该物种进行控制运动提供了指示,以提高清除成功率,减少工作量。

更新日期:2020-07-21
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