New Zealand fur seal demographics

Open Bay Islands, 2003

Mark-recapture estimate, 31 Jan – 01 Feb 2003

Total marked
692
Mean estimate
1019.9
Range
1008.5 – 1035.9

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 31 Jan 2003 13:35 – 13:37 Sector 1 3 -
31 Jan 2003 13:38 – 13:49 Sector 2 2 35
31 Jan 2003 13:52 – 14:12 Sector 3 23 50
31 Jan 2003 14:20 – 14:56 Sector 4 29 60
31 Jan 2003 14:58 – 15:21 Sector 5 12 42
31 Jan 2003 15:24 – 15:56 Sector 6 18 67
31 Jan 2003 16:33 – 16:40 Sector 7 47 35
All sectors 134 289 1 - 691 1 1011.8
2 31 Jan 2003 20:20 – 20:22 Sector 1 4 -
31 Jan 2003 20:08 – 20:18 Sector 2 2 23
31 Jan 2003 19:48 – 20:05 Sector 3 15 37
31 Jan 2003 19:08 – 19:40 Sector 4 18 43
31 Jan 2003 18:45 – 19:07 Sector 5 18 45
31 Jan 2003 18:04 – 18:41 Sector 6 16 44
31 Jan 2003 16:45 – 16:50 Sector 7 37 28
All sectors 110 220 1 - 690 2 1035.9
3 01 Feb 2003 09:00 – 09:02 Sector 1 3 -
01 Feb 2003 09:02 – 09:20 Sector 2 3 48
01 Feb 2003 09:20 – 09:38 Sector 3 18 47
01 Feb 2003 09:45 – 10:21 Sector 4 26 62
01 Feb 2003 10:24 – 10:42 Sector 5 22 31
01 Feb 2003 10:49 – 11:19 Sector 6 10 32
31 Jan 2003 16:55 – 17:03 Sector 7 41 30
All sectors 123 250 1 - 689 3 1030.1
4 01 Feb 2003 13:48 – 13:49 Sector 1 4 -
01 Feb 2003 13:37 – 13:47 Sector 2 4 41
01 Feb 2003 13:13 – 13:33 Sector 3 15 58
01 Feb 2003 12:30 – 13:03 Sector 4 24 50
01 Feb 2003 12:09 – 12:28 Sector 5 14 32
01 Feb 2003 11:25 – 12:06 Sector 6 20 51
31 Jan 2003 17:08 – 17:14 Sector 7 41 33
All sectors 122 265 - - 689 3 1008.5
5 01 Feb 2003 13:55 – 13:57 Sector 1 4 -
01 Feb 2003 13:58 – 14:08 Sector 2 1 35
01 Feb 2003 14:10 – 14:27 Sector 3 18 39
01 Feb 2003 14:38 – 15:14 Sector 4 19 53
01 Feb 2003 15:15 – 15:40 Sector 5 18 27
01 Feb 2003 15:45 – 16:27 Sector 6 16 57
31 Jan 2003 17:25 – 17:30 Sector 7 38 33
All sectors 114 244 - - 689 3 1013.1

Dead count, 27–31 Jan 2003

Count
106

Dead counts

Date Sector Fresh Decomposing Dry Count
27–31 Jan 2003 Sector 1 - - - -
27–31 Jan 2003 Sector 2 - 1 7 8
27–31 Jan 2003 Sector 3 3 3 14 20
27–31 Jan 2003 Sector 4 7 2 18 27
27–31 Jan 2003 Sector 5 - 1 4 5
27–31 Jan 2003 Sector 6 - 11 6 17
27–31 Jan 2003 Sector 7 3 9 17 29
All sectors 13 27 66 106