NRES 488/688 HOMEWORK 2.
1. The data below represent capture-recapture data from a Jolly-Seber study design. Calculate the estimate for the number of marked individuals in the population, the number marked and population size for the eighth capture occasion.
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Time of Capture |
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Time of last capture |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
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1 |
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15 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
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2 |
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15 |
0 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
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3 |
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37 |
2 |
0 |
0 |
0 |
0 |
0 |
0 |
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4 |
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61 |
4 |
1 |
1 |
0 |
0 |
0 |
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5 |
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75 |
3 |
2 |
0 |
0 |
0 |
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6 |
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77 |
4 |
0 |
0 |
0 |
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7 |
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69 |
0 |
0 |
0 |
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8 |
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8 |
1 |
0 |
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9 |
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14 |
0 |
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10 |
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19 |
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Total marked (mt) |
0 |
15 |
16 |
37 |
64 |
79 |
81 |
76 |
8 |
15 |
19 |
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Total unmarked
(ut) |
22 |
26 |
32 |
45 |
25 |
22 |
26 |
15 |
11 |
12 |
3 |
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Total caught (nt) |
22 |
41 |
48 |
82 |
89 |
101 |
107 |
91 |
19 |
27 |
22 |
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Total relaeased (st) |
21 |
41 |
46 |
82 |
88 |
99 |
106 |
90 |
19 |
26 |
22 |
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2. Use the Edwards and Eberhardt.inp
file in the Public folder for NRES 488.
Move the file to your personal folder.
Use Closed Captures with dfull heterogeneity
and use Program Mark to produce an estimate of population size. Check the performance of the standard closed
capture models M0, Mb, Mt, Mh,
Mbh, Mbt,
Mth, Mbt,
Mbht. Which model best fit the data?