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Table 1 Sample sizes for TMMC seroprevalence time series, by sex and age. Total numbers and numbers excluding leptospirosis-induced strands (in parentheses) are shown

From: Cyclical changes in seroprevalence of leptospirosis in California sea lions: endemic and epidemic disease in one host species?

Sex

Age

1995

1996

1997

1998

1999

2000

2001

2002

2003

2004

2005

Female

Yearling

8

16

19

23

8

18

21

19

38

20

29

 

(1–2 y.o.)a

(3)

(14)

(17)

(22)

(7)

(11)

(20)

(18)

(38)

(9)

(29)

 

Subadult

9

6

19

23

11

19

16

12

20

13

5

 

(2–5 y.o.)

(3)

(5)

(13)

(19)

(2)

(13)

(11)

(10)

(16)

(7)

(5)

 

Adult

9

7

23

19

18

20

20

18

20

19

20

 

(≥ 5 y.o.)

(5)

(5)

(16)

(16)

(13)

(19)

(18)

(17)

(20)

(16)

(19)

Male

Yearling

12

18

19

18

17

17

18

20

38

18

36

 

(1–2 y.o.)a

(9)

(18)

(15)

(18)

(10)

(12)

(18)

(18)

(38)

(6)

(33)

 

Juvenile

21

25

20

20

20

20

19

20

20

19

16

 

(2–4 y.o.)

(2)

(16)

(12)

(19)

(3)

(5)

(8)

(9)

(12)

(2)

(11)

 

Subadult

19

14

15

20

20

19

13

10

10

19

19

 

(4–8 y.o.)

(3)

(10)

(9)

(14)

(4)

(8)

(10)

(6)

(9)

(9)

(9)

 

Adult

12

8

9

4

5

8

14

9

8

17

6

 

(≥ 8 y.o.)

(7)

(8)

(7)

(3)

(4)

(7)

(12)

(6)

(8)

(9)

(6)

Total

 

90

94

124

127

99

121

121

108

154

125

131

  

(32)

(76)

(89)

(111)

(43)

(75)

(97)

(84)

(141)

(58)

(112)

  1. a The yearling class may include some pups 8–12 months of age, stranding in February to May.