New Zealand fur seal demographics

Open Bay Islands, 2002

Mark-recapture estimate, 31 Jan – 01 Feb 2002

Total marked
474
Mean estimate
623.4
Range
593.3 – 660.4

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 31 Jan 2002 14:20 – 14:22 Sector 1 - -
31 Jan 2002 14:22 – 14:37 Sector 2 6 15
31 Jan 2002 14:37 – 14:57 Sector 3 9 17
31 Jan 2002 15:01 – 15:24 Sector 4 7 27
31 Jan 2002 15:24 – 15:48 Sector 5 10 31
31 Jan 2002 15:56 – 16:23 Sector 6 6 35
31 Jan 2002 20:30 – 20:56 Sector 7 12 37
All sectors 50 162 1 - 473 1 619.4
2 31 Jan 2002 18:54 – 18:55 Sector 1 - -
31 Jan 2002 18:34 – 18:54 Sector 2 7 19
31 Jan 2002 18:21 – 18:34 Sector 3 2 27
31 Jan 2002 17:47 – 18:15 Sector 4 13 33
31 Jan 2002 17:26 – 17:47 Sector 5 11 33
31 Jan 2002 16:53 – 17:18 Sector 6 7 49
31 Jan 2002 20:56 – 21:20 Sector 7 10 35
All sectors 50 196 4 - 469 5 593.3
3 01 Feb 2002 07:36 – 07:38 Sector 1 - -
01 Feb 2002 07:39 – 07:54 Sector 2 4 16
01 Feb 2002 07:55 – 08:04 Sector 3 8 28
01 Feb 2002 08:09 – 08:29 Sector 4 6 36
01 Feb 2002 08:30 – 08:52 Sector 5 16 31
01 Feb 2002 08:58 – 09:24 Sector 6 8 27
01 Feb 2002 09:50 – 10:12 Sector 7 10 24
All sectors 52 162 1 - 468 6 623.6
4 01 Feb 2002 13:08 – 13:11 Sector 1 1 1
01 Feb 2002 12:51 – 13:08 Sector 2 4 4
01 Feb 2002 12:30 – 12:51 Sector 3 4 18
01 Feb 2002 12:16 – 12:30 Sector 4 5 27
01 Feb 2002 12:02 – 12:16 Sector 5 13 22
01 Feb 2002 11:31 – 11:58 Sector 6 - 13
01 Feb 2002 10:17 – 10:45 Sector 7 9 29
All sectors 36 114 2 - 466 8 620.2
5 01 Feb 2002 14:20 – 14:22 Sector 1 1 1
01 Feb 2002 14:22 – 14:39 Sector 2 4 9
01 Feb 2002 14:40 – 14:55 Sector 3 3 14
01 Feb 2002 14:58 – 15:17 Sector 4 4 26
01 Feb 2002 15:17 – 15:33 Sector 5 8 14
01 Feb 2002 15:45 – 16:10 Sector 6 11 13
01 Feb 2002 10:52 – 11:13 Sector 7 11 27
All sectors 42 104 1 - 465 9 660.4

Dead count, 28–31 Jan 2002

Count
119

Dead counts

Date Sector Fresh Decomposing Dry Count
28–31 Jan 2002 Sector 1 1 - - 1
28–31 Jan 2002 Sector 3 3 7 9 19
28–31 Jan 2002 Sector 4 3 8 2 13
28–31 Jan 2002 Sector 5 4 1 6 11
28–31 Jan 2002 Sector 6 5 3 8 16
28–31 Jan 2002 Sector 7 5 8 46 59
All sectors 21 27 71 119