New Zealand fur seal demographics

Wekakura Point, 2013

Mark-recapture estimate, 30–31 Jan 2013

Total marked
151
Mean estimate
199.2
Range
194.7 – 207.3

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 30 Jan 2013 08:58 – 09:15 Headland 1 17 50
30 Jan 2013 07:15 – 07:47 Headland 2 8 27
30 Jan 2013 17:30 – 17:55 Headland 3 7 25
All sectors 32 102 - - 151 - 198.2
2 30 Jan 2013 09:35 – 09:55 Headland 1 10 27
30 Jan 2013 08:10 – 08:40 Headland 2 4 24
30 Jan 2013 18:15 – 18:35 Headland 3 8 21
All sectors 22 72 - - 151 - 196.8
3 30 Jan 2013 10:15 – 10:32 Headland 1 10 29
30 Jan 2013 16:56 – 17:22 Headland 2 5 25
31 Jan 2013 18:55 – 19:21 Headland 3 6 18
All sectors 21 72 - - 151 - 194.7
4 30 Jan 2013 10:52 – 11:12 Headland 1 12 41
30 Jan 2013 19:37 – 20:06 Headland 2 7 18
31 Jan 2013 07:50 – 08:14 Headland 3 11 21
All sectors 30 80 - - 151 - 207.3
5 30 Jan 2013 15:40 – 15:50 Headland 1 13 45
31 Jan 2013 07:10 – 07:43 Headland 2 6 25
31 Jan 2013 08:35 – 09:05 Headland 3 12 27
All sectors 31 97 - - 151 - 199.1

Dead count, 28–29 Jan 2013

Count
7

Dead counts

Date Sector Fresh Decomposing Dry Count
28 Jan 2013 Headland 1 1 - 2 3
29 Jan 2013 Headland 2 1 1 - 2
29 Jan 2013 Headland 3 - 1 1 2
All sectors 2 2 3 7