New Zealand fur seal demographics

Wekakura Point, 2001

Mark-recapture estimate, 31 Jan – 02 Feb 2001

Total marked
458
Mean estimate
615.9
Range
591.3 – 663.8

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 31 Jan 2001 19:43 – 19:56 Headland 1 16 61
01 Feb 2001 08:14 – 08:31 Headland 2 45 84
01 Feb 2001 08:39 – 08:53 Headland 3 26 48
All sectors 87 193 - - 458 - 663.8
2 31 Jan 2001 20:16 – 20:25 Headland 1 16 60
01 Feb 2001 11:33 – 11:48 Headland 2 25 74
01 Feb 2001 09:13 – 09:25 Headland 3 14 51
All sectors 55 185 - - 458 - 593.7
3 31 Jan 2001 20:45 – 20:51 Headland 1 20 47
02 Feb 2001 09:08 – 09:31 Headland 2 28 85
01 Feb 2001 09:45 – 09:56 Headland 3 12 38
All sectors 60 170 - - 458 - 619.1
4 01 Feb 2001 20:15 – 20:26 Headland 1 16 54
02 Feb 2001 09:51 – 10:10 Headland 2 29 81
01 Feb 2001 10:16 – 10:30 Headland 3 14 40
All sectors 59 175 - - 458 - 611.9
5 01 Feb 2001 20:46 – 20:54 Headland 1 15 47
02 Feb 2001 10:30 – 10:50 Headland 2 18 65
01 Feb 2001 10:50 – 11:05 Headland 3 12 42
All sectors 45 154 - - 458 - 591.3

Dead count, 29–31 Jan 2001

Count
8

Dead counts

Date Sector Fresh Decomposing Dry Count
29–31 Jan 2001 Headland 1 - 2 2 4
29–31 Jan 2001 Headland 2 - - 4 4
29–31 Jan 2001 Headland 3 - - - -
All sectors - 2 6 8