New Zealand fur seal demographics

Wekakura Point, 1999

Mark-recapture estimate, 26–28 Jan 1999

Total marked
388
Mean estimate
535.9
Range
514.5 – 576.1

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 26 Jan 1999 09:28 – 09:39 Headland 1 3 57
26 Jan 1999 18:53 – 19:10 Headland 2 20 93
27 Jan 1999 12:33 – 12:53 Headland 3 38 33
All sectors 61 183 - - 388 - 517.0
2 26 Jan 1999 09:44 – 09:54 Headland 1 5 59
26 Jan 1999 19:26 – 19:48 Headland 2 28 78
27 Jan 1999 13:08 – 13:27 Headland 3 30 33
All sectors 63 170 - - 388 - 531.3
3 26 Jan 1999 10:09 – 10:19 Headland 1 7 47
26 Jan 1999 20:03 – 20:23 Headland 2 28 83
27 Jan 1999 13:44 – 14:05 Headland 3 30 35
All sectors 65 165 - - 388 - 540.3
4 26 Jan 1999 10:34 – 10:43 Headland 1 5 48
26 Jan 1999 20:35 – 20:47 Headland 2 21 78
28 Jan 1999 13:07 – 13:31 Headland 3 28 39
All sectors 54 165 - - 388 - 514.5
5 26 Jan 1999 10:58 – 11:06 Headland 1 8 42
27 Jan 1999 14:18 – 14:41 Headland 2 28 76
28 Jan 1999 13:46 – 14:04 Headland 3 38 34
All sectors 74 152 - - 388 - 576.1

Dead count, 25–26 Jan 1999

Count
28

Dead counts

Date Sector Fresh Decomposing Dry Count
25–26 Jan 1999 Headland 1 4 - 7 11
25–26 Jan 1999 Headland 2 1 - 5 6
25–26 Jan 1999 Headland 3 3 - 8 11
All sectors 8 - 20 28