Ecological Archives A025-034-A2

Jeffrey F. Bromaghin, Trent L. McDonald, Ian Stirling, Andrew E. Derocher, Evan S. Richardson, Eric V. Regehr, David C. Douglas, George M. Durner, Todd Atwood, and Steven C. Amstrup. 2015. Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline. Ecological Applications 25:634651. http://dx.doi.org/10.1890/14-1129.1

Appendix B. Southern Beaufort Sea polar bear capture statistics.

Table B1. The number of southern Beaufort Sea polar bears captured (N), and the number (M) and percentage (%) that were previously captured, by sex (♀ = Female, ♂ = Male), year, and age-class in the USGS data set.

 

 

Cub

 

Yearling

 

Subadult

 

Adult

Sex

Year

N

 

N

M

%

 

N

M

%

 

N

M

%

2001

11

 

15

-

-

 

9

-

-

 

56

-

-

2002

11

 

2

0

0.0

 

11

5

45.5

 

48

24

50.0

2003

5

 

1

0

0.0

 

8

4

50.0

 

33

15

45.5

2004

11

 

2

0

0.0

 

18

2

11.1

 

47

17

36.2

2005

7

 

1

0

0.0

 

8

1

12.5

 

32

17

53.1

2006

4

 

7

1

14.3

 

8

1

12.5

 

31

15

48.4

2007

5

 

4

0

0.0

 

3

1

33.3

 

26

13

50.0

2008

6

 

0

0

-

 

10

1

10.0

 

33

19

57.6

2009

10

 

6

3

50.0

 

2

1

50.0

 

36

24

66.7

2010

5

 

3

1

33.3

 

2

1

50.0

 

27

16

59.3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2001

9

 

11

-

-

 

3

-

-

 

21

-

-

2002

10

 

4

1

25.0

 

13

4

30.8

 

19

2

10.5

2003

11

 

4

1

25.0

 

8

4

50.0

 

37

4

10.8

2004

13

 

6

1

16.7

 

19

9

47.4

 

32

10

31.3

2005

14

 

1

0

0.0

 

6

4

66.7

 

27

15

55.6

2006

4

 

0

0

-

 

5

3

60.0

 

31

20

64.5

2007

6

 

2

0

0.0

 

3

0

0.0

 

31

15

48.4

2008

7

 

1

0

0.0

 

4

0

0.0

 

27

15

55.6

2009

11

 

7

2

28.6

 

0

0

-

 

40

22

55.0

2010

8

 

7

2

28.6

 

3

2

66.7

 

20

16

80.0

 

Table B2. The number of southern Beaufort Sea polar bears captured (N), and the number (M) and percentage (%) that were previously captured, by sex (♀ = Female, ♂ = Male), year, and age-class in the USCA data set.

 

 

Cub

 

Yearling

 

Subadult

 

Adult

Sex

Year

N

 

N

M

%

 

N

M

%

 

N

M

%

2001

11

 

15

-

-

 

9

-

-

 

56

-

-

2002

11

 

2

0

0.0

 

11

5

45.5

 

48

24

50.0

2003

10

 

3

0

0.0

 

15

5

33.3

 

49

17

34.7

2004

17

 

9

1

11.1

 

39

6

15.4

 

91

25

27.5

2005

14

 

9

0

0.0

 

29

9

31.0

 

87

34

39.1

2006

8

 

11

2

18.2

 

10

4

40.0

 

54

25

46.3

2007

5

 

8

0

0.0

 

7

6

85.7

 

44

22

50.0

2008

7

 

2

0

0.0

 

10

1

10.0

 

43

27

62.8

2009

12

 

10

4

40.0

 

5

4

80.0

 

54

34

63.0

2010

5

 

6

1

16.7

 

3

1

33.3

 

40

22

55.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2001

9

 

11

-

-

 

3

-

-

 

21

-

-

2002

10

 

4

1

25.0

 

13

4

30.8

 

19

2

10.5

2003

13

 

5

1

20.0

 

19

4

21.1

 

53

5

9.4

2004

21

 

9

1

11.1

 

32

15

46.9

 

73

16

21.9

2005

17

 

7

0

0.0

 

19

7

36.8

 

69

31

44.9

2006

8

 

2

0

0.0

 

9

4

44.4

 

48

29

60.4

2007

6

 

5

2

40.0

 

5

4

80.0

 

36

19

52.8

2008

8

 

1

0

0.0

 

6

2

33.3

 

31

19

61.3

2009

13

 

11

2

18.2

 

3

1

33.3

 

49

35

71.4

2010

8

 

11

2

18.2

 

3

2

66.7

 

21

17

81.0

 

Table B3. The number of times individual polar bears were captured during the study period. Initial captures of new bears in 2010 are included.

No. times
captured

USGS
data

USCA
data

1

516

767

2

115

200

3

47

72

4

26

32

5

9

12

6

1

2

7

1

1

Total

715

1,086

 

FigB1

Fig. B1. The proportion of individuals subsequently recaptured by capture year and age class for the USGS data set. Numbers co-located with data points indicate the number of bears captured each year.


 

FigB2

Fig. B2. The proportion of individuals subsequently recaptured by capture year and age class for the USCA data set. Numbers co-located with data points indicate the number of bears captured each year.


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