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Table 2 Four instances where data from GLS ear-tags together with capture data (CAP) enabled the determination of age at first reproduction. These females were captured first as COYs, providing known age. The first reproduction attempt is highlighted in bold for each individual. D1 = denning, D0 = non-denning

From: Light-level geolocation as a tool to monitor polar bear (Ursus maritimus) denning ecology: a case study

Age

Bear A

Bear B

Bear C

Bear D

4

(GLS) D0

(GLS) D0

No information

No information

5

(GLS) D1

(GLS) D0

(CAP) Never lactated

(CAP) Never lactated

6

(GLS) D0

(CAP) Lactating

(GLS) D0

(GLS) D0

7

(GLS) D1

No information

(GLS) D1

(GLS) D0

8

No information

No information

(GLS) D0

(GLS) D1