Fig. 3

Number of days each type of ear and fur tag remained active while attached to a free-ranging subadult or adult male polar bear on the sea ice or coast of Hudson Bay between 2016 and 2022. Solid black lines represent the median duration of time each tag type remained active. Boxes show the interquartile range, spanning from the first quartile (lower edge) to the third quartile (upper edge). Whiskers extend 1.5 times the interquartile range above the third quartile and below the first quartile, whereas the data points beyond the whiskers are considered outliers. Data points are spread randomly along the x-axis to avoid overlap. *Two of the 42 bears equipped with ear tags between 2016 and 2022 were fitted with a subsequent ear tag after the first stopped functioning