New Zealand fur seal demographics

Open Bay Islands, 1993

Mark-recapture estimate, 02–05 Feb 1993

Total marked
687
Mean estimate
1373.5
Range
1338.4 – 1422.6

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 02 Feb 1993 08:44 – 08:46 Sector 1 12 -
02 Feb 1993 08:47 – 09:06 Sector 2 10 22
02 Feb 1993 09:06 – 09:30 Sector 3 22 23
02 Feb 1993 09:33 – 10:13 Sector 4 27 46
02 Feb 1993 10:13 – 10:38 Sector 5 53 44
02 Feb 1993 10:38 – 11:13 Sector 6 43 31
02 Feb 1993 11:23 – 12:01 Sector 7 80 63
All sectors 247 229 3 - 684 3 1422.6
2 02 Feb 1993 15:23 – 15:30 Sector 1 8 -
02 Feb 1993 15:15 – 15:23 Sector 2 11 25
02 Feb 1993 14:41 – 15:15 Sector 3 19 26
02 Feb 1993 14:21 – 14:41 Sector 4 42 54
02 Feb 1993 14:00 – 14:21 Sector 5 53 46
02 Feb 1993 13:30 – 14:00 Sector 6 35 35
02 Feb 1993 13:00 – 13:25 Sector 7 53 39
All sectors 221 225 - - 684 3 1356.8
3 03 Feb 1993 09:24 – 09:27 Sector 1 11 1
03 Feb 1993 09:27 – 09:42 Sector 2 12 36
03 Feb 1993 09:42 – 10:07 Sector 3 33 30
03 Feb 1993 10:19 – 10:51 Sector 4 31 56
03 Feb 1993 10:52 – 11:21 Sector 5 46 41
03 Feb 1993 11:21 – 11:57 Sector 6 41 46
03 Feb 1993 12:06 – 12:35 Sector 7 78 54
All sectors 252 264 - - 684 3 1338.4
4 03 Feb 1993 16:48 – 16:49 Sector 1 9 -
03 Feb 1993 16:35 – 16:48 Sector 2 12 20
03 Feb 1993 16:10 – 16:35 Sector 3 32 43
03 Feb 1993 15:28 – 16:06 Sector 4 38 63
03 Feb 1993 15:03 – 15:28 Sector 5 45 48
03 Feb 1993 14:35 – 15:01 Sector 6 44 33
03 Feb 1993 14:00 – 14:24 Sector 7 74 42
All sectors 254 249 - 1 684 4 1384.0
5 05 Feb 1993 08:32 – 08:34 Sector 1 14 -
05 Feb 1993 08:34 – 08:52 Sector 2 23 32
05 Feb 1993 08:52 – 09:21 Sector 3 29 47
05 Feb 1993 09:21 – 10:00 Sector 4 33 74
05 Feb 1993 10:00 – 10:27 Sector 5 45 41
05 Feb 1993 10:27 – 11:08 Sector 6 53 35
05 Feb 1993 11:16 – 11:40 Sector 7 74 44
All sectors 271 273 - - 684 4 1365.5