New Zealand fur seal demographics

Wekakura Point, 2002

Mark-recapture estimate, 30–31 Jan 2002

Total marked
557
Mean estimate
721.7
Range
698.4 – 762.4

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 06:30 – 06:44 Headland 1 26 95
30 Jan 2002 11:30 – 11:50 Headland 2 24 140
31 Jan 2002 17:00 – 17:25 Headland 3 36 74
All sectors 86 309 - - 557 - 711.8
2 31 Jan 2002 07:00 – 07:11 Headland 1 28 86
30 Jan 2002 13:00 – 13:17 Headland 2 25 137
31 Jan 2002 17:40 – 17:59 Headland 3 20 64
All sectors 73 287 - - 557 - 698.4
3 31 Jan 2002 07:26 – 07:38 Headland 1 19 66
30 Jan 2002 13:32 – 13:57 Headland 2 27 126
31 Jan 2002 18:14 – 18:33 Headland 3 30 58
All sectors 76 250 - - 557 - 726.0
4 31 Jan 2002 07:53 – 08:04 Headland 1 24 88
30 Jan 2002 14:15 – 14:40 Headland 2 36 127
31 Jan 2002 18:48 – 19:08 Headland 3 39 53
All sectors 99 268 - - 557 - 762.4
5 31 Jan 2002 08:19 – 08:31 Headland 1 25 84
30 Jan 2002 14:55 – 15:16 Headland 2 23 119
31 Jan 2002 19:23 – 19:42 Headland 3 21 48
All sectors 69 251 - - 557 - 709.8

Dead count, 28 Jan 2002

Count
16

Dead counts

Date Sector Fresh Decomposing Dry Count
28 Jan 2002 Headland 1 1 - 1 2
28 Jan 2002 Headland 2 2 2 5 9
28 Jan 2002 Headland 3 2 - 3 5
All sectors 5 2 9 16