ABSTRACT Capsule: Fitting geolocators to Common Sandpipers Actitis hypoleucos did not affect their return rates, return dates, body condition or reproductive success, but did cause leg injuries in some individuals. Aims: To investigate the effect of fitting geolocators to Common Sandpipers on their return rates and timing, the condition in which they return and their subsequent breeding success. Methods: We fitted geolocators to colour-ringed Common Sandpipers and monitored them throughout the breeding seasons prior to migration and following return from their wintering grounds. We then compared return rate, return date, change in body condition, hatching success, and fledging success between birds with and without the tags. We also fitted a number of smaller geolocators to wintering individuals in Africa and compared their return rates with a control group. Results: We found no significant differences between birds with and without geolocators in any of the variables measured. However, several individuals fitted with the larger tags were found to have incurred leg injuries. Conclusion: Our study highlights the need for complete transparency when reporting the effects of geolocators and shows the importance of continuous monitoring of individuals when carrying out tracking studies.

中文翻译：

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地理定位器对普通鹬低白质白斑鹬的返回率、状况和繁殖成功率的影响

摘要胶囊：将地理定位器安装到常见的鹬 Actitis hypoleucos 不会影响它们的返回率、返回日期、身体状况或繁殖成功率，但确实导致某些个体腿部受伤。目的：调查将地理定位器安装到普通鹬上对其返回率和时间、返回条件以及随后的繁殖成功的影响。方法：我们将地理定位器安装到色环普通鹬身上，并在迁徙前和从越冬地返回后的整个繁殖季节对它们进行监测。然后，我们比较了带标签和不带标签的鸟类之间的返还率、返还日期、身体状况的变化、孵化成功率和羽化成功率。我们还为非洲越冬的个体安装了一些较小的地理定位器，并将其返回率与对照组进行了比较。结果：我们发现在测量的任何变量中，有和没有地理定位器的鸟类之间没有显着差异。然而，发现有几个装有较大标签的人腿部受伤。结论：我们的研究强调在报告地理定位器的影响时需要完全透明，并表明在进行跟踪研究时对个人进行持续监测的重要性。