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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.