New Zealand fur seal demographics

Wekakura Point, 1997

Mark-recapture estimate, 29–31 Jan 1997

Total marked
702
Mean estimate
976.3
Range
950.0 – 1021.8

Mark-recapture counts

Count number Date Time Sector Unmarked count Marked count Dead marked Dead unmarked Total marked Cum. dead Estimate?
1 29 Jan 1997 17:40 – 19:19 Headland 1 24 105
30 Jan 1997 19:06 – 20:42 Headland 2 52 159
30 Jan 1997 08:20 – 10:56 Headland 3 63 75
All sectors 139 339 - - 702 - 989.4
2 29 Jan 1997 17:40 – 19:19 Headland 1 16 94
30 Jan 1997 19:06 – 20:42 Headland 2 28 125
30 Jan 1997 08:20 – 10:56 Headland 3 65 71
All sectors 109 290 - - 702 - 965.3
3 29 Jan 1997 17:40 – 19:19 Headland 1 8 85
30 Jan 1997 19:06 – 20:42 Headland 2 52 131
30 Jan 1997 08:20 – 10:56 Headland 3 66 60
All sectors 126 276 - - 702 - 1021.8
4 29 Jan 1997 17:40 – 19:19 Headland 1 10 105
31 Jan 1997 08:30 – 09:39 Headland 2 40 146
30 Jan 1997 08:20 – 10:56 Headland 3 65 74
All sectors 115 325 - - 702 - 950.0
5 29 Jan 1997 17:40 – 19:19 Headland 1 8 114
31 Jan 1997 08:30 – 09:39 Headland 2 43 123
30 Jan 1997 08:20 – 10:56 Headland 3 62 76
All sectors 113 313 - - 702 - 955.0

Dead count, 27–29 Jan 1997

Count
11

Dead counts

Date Sector Fresh Decomposing Dry Count
27–29 Jan 1997 Headland 1 3 1 1 5
27–29 Jan 1997 Headland 2 2 3 - 5
27–29 Jan 1997 Headland 3 - 1 - 1
All sectors 5 5 1 11