by jhines » Mon Nov 08, 2004 10:42 am
The intervals will be the same for both young and adults, but it sounds like the capture/resighting probability for adults in Jan is zero. Since you only band and release young, the PIM's would look something like this:
survival:
1 11 12 13 14 15 16 17 18 19
2 3 13 14 15 16 17 18 19
3 4 14 15 16 17 18 19
4 5 15 16 17 18 19
5 15 16 17 18 19
6 16 17 18 19
7 17 18 19
8 18 19
9 19
10
recapture:
20 0 21 0 22 23 24 25 26 27
28 21 0 22 23 24 25 26 27
21 0 22 23 24 25 26 27
29 22 23 24 25 26 27
22 23 24 25 26 27
23 24 25 26 27
24 25 26 27
25 26 27
26 27
27
Parameters 1-10 are young survival rates, 11-19 are adult survival rates. Parameters 28-29 are young recapture probabilities, and 20-27 are adult recapture probabilities. I put zeros in the recapture PIM matrix to emphasize the fact that the recapture probability for that cohort and occasion will be zero. In MARK, you would NOT put a zero in the pim, but use another parameter number (30) and fix it to zero. So, the recapture PIM would be:
recapture:
20 30 21 30 22 23 24 25 26 27
28 21 30 22 23 24 25 26 27
21 30 22 23 24 25 26 27
29 22 23 24 25 26 27
22 23 24 25 26 27
23 24 25 26 27
24 25 26 27
25 26 27
26 27
27
I haven't thought very hard about what parameters are estimable, but in this general model, I know that you would have to fix the last survival or recapture PIM (19 or 27). I suspect that you might have to fix some of the early survival or recapture parameters also (make constant over the first 4 occasions).