A Model of the Productivity of the Northern Pintail
Appendix A
| Value | Variable or parameter | Description |
|---|---|---|
| 31.0 | H | Hatch time in days |
| -5.0 | INSTAGE | Scaling factor |
| 23.0 | INCTIME | Incubation time in days |
| 2560.0 | FOURSQMI | Four square mile acreage |
| 675.0 | MINWTN | Minimum weight in grams |
| 3.0 | INA | Scaling factor |
| 800.0 | WTBAR (1) | Average weight of immature arrivals (grams) |
| 900.0 | WTBAR (2) | Average weight of adult arrivals (grams) |
| 60.0 | WTSTD (1) | SD average weights of immatures |
| 60.0 | WTSTD (2) | SD average weights of adults |
| 450.0 | MINWTELP | Minimum weight used in egg-laying potential function |
| 15.0 | SCALE | Scaling factor |
| 15.43 | CLUA | Regression coefficient for clutch function |
| 0.0631 | CLUB | Regression coefficient for clutch function |
| 0.89 | CLUDEL | Scaling factor |
| 4.0 | NESTLESS | Days before renesting is possible |
| 0.97 | ROBELA | Regression coefficient Nest Site Selection (NSS) function |
| 0.28 | ROBELB | Regression coefficient NSS function |
| 2.23 | ROBLMIN | Regression coefficient NSS function |
| 0.50 | SUCCBRK | Scaling factor |
| 0.25 | SUCSCALE | Scaling factor |
| 1125.0 | MAXWT | Maximum weight (grams) used in weight function |
| 7.5 | LOSSLAY | Weight (grams) lost per day during egg laying |
| 1.5 | LOSSINC | Weight (grams) lost per day during incubation |
| 0.587 | ASRAF | Annual survival rate of adult females |
| 0.555 | ASRIF | Annual survival rate of immature females |
| 0.719 | SSRAF | Summer survival rate of adult females |
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