New Zealand fur seal demographics

Open Bay Islands, 1997

Mark-recapture estimate, 30–31 Jan 1997

Total marked: 700
Mean estimate: 1144.9
Range: 1089.0 – 1188.6

Mark-recapture counts

Count number	Date	Time	Sector	Unmarked count	Marked count	Dead marked	Dead unmarked	Total marked	Cum. dead	Estimate^?
1	30 Jan 1997		Sector 1	-	-
	30 Jan 1997	08:00 – 08:15	Sector 2	9	22
	30 Jan 1997	08:15 – 08:30	Sector 3	12	19
	30 Jan 1997	08:30 – 09:35	Sector 4	24	25
	30 Jan 1997		Sector 5	11	37
	30 Jan 1997	09:35 – 10:20	Sector 6	12	31
	30 Jan 1997	10:20 – 10:45	Sector 7	38	56
			All sectors	106	190	-	-	700	-	1089.0
2	30 Jan 1997		Sector 1	-	-
	30 Jan 1997	16:20 – 16:30	Sector 2	14	31
	30 Jan 1997	14:25 – 14:45	Sector 3	31	31
	30 Jan 1997	13:50 – 14:25	Sector 4	36	31
	30 Jan 1997	13:50 – 12:50	Sector 5	25	53
	30 Jan 1997		Sector 6	6	14
	30 Jan 1997	10:45 – 11:05	Sector 7	26	37
			All sectors	138	197	-	-	700	-	1188.6
3	30 Jan 1997		Sector 1	-	-
	30 Jan 1997		Sector 2	7	21
	30 Jan 1997		Sector 3	32	32
	30 Jan 1997	17:30	Sector 4	33	42
	30 Jan 1997	17:05 – 17:30	Sector 5	16	37
	30 Jan 1997	16:45 – 17:05	Sector 6	20	42
	30 Jan 1997	11:05 – 11:25	Sector 7	28	45
			All sectors	136	219	-	-	700	-	1133.3
4	31 Jan 1997		Sector 1	-	-
	31 Jan 1997	07:50 – 08:05	Sector 2	12	27
	31 Jan 1997	08:05 – 08:40	Sector 3	31	33
	31 Jan 1997	12:00 – 12:20	Sector 4	27	26
	31 Jan 1997	08:55	Sector 5	16	43
	31 Jan 1997		Sector 6	24	42
	30 Jan 1997	11:25 – 12:15	Sector 7	26	37
			All sectors	136	208	-	-	700	-	1156.2
5	31 Jan 1997		Sector 1	-	-
	31 Jan 1997	11:40 – 11:50	Sector 2	9	11
	31 Jan 1997	11:15 – 11:40	Sector 3	17	18
	31 Jan 1997	10:55 – 11:15	Sector 4	30	35
	31 Jan 1997	10:30 – 10:55	Sector 5	14	35
	31 Jan 1997	10:10 – 10:30	Sector 6	25	46
	30 Jan 1997	12:15 – 12:30	Sector 7	29	44
			All sectors	124	189	-	-	700	-	1157.5

Dead count, 27–29 Jan 1997

Count: 83

Dead counts

Date	Sector	Fresh	Decomposing	Dry	Count
27–29 Jan 1997	Sector 2	2	-	1	3
27–29 Jan 1997	Sector 3	3	4	2	9
27–29 Jan 1997	Sector 4	4	1	9	14
27–29 Jan 1997	Sector 5	1	-	2	3
27–29 Jan 1997	Sector 6	4	8	15	27
27–29 Jan 1997	Sector 7	5	6	16	27
	All sectors	19	19	45	83

The New Zealand fur seal demographic database was developed by Dragonfly Science. The data are copyright Department of Conservation, and are made available under a creative commons attribution 3.0 New Zealand licence, following the recommendations of NZGOAL. This licence allows the data to be used for any other purpose and republished, provided only that attribution is given.