Impact of Red Fox Predation on the Sex Ratio of Prairie Mallards
Table 15: Average Sex Ratio and Rates of "Other" Mortality
Table 15. Average sex ratio and rates of "other" mortality resulting
from small changess in the input parameters. The "response" value, a measure
of the influence of in input parameter on the output variable, is defined
in the text (page 15).a
|
|
Sex ratio |
Male "other" (r9) |
Female "other" (r10) |
|
|
Average |
Response |
Average |
Response |
Average |
Response |
|
Standard |
125.9 |
- |
.1193 |
- |
.1270 |
- |
| F |
|
-10% |
125.9 |
0% |
.1230 |
-31.0% |
.1353 |
-65.4% |
|
+10% |
125.9 |
0 |
.1156 |
-31.0 |
.1199 |
-55.9 |
| PM |
|
-10% |
125.9 |
0 |
.1152 |
34.4 |
.1192 |
61.4 |
|
+10% |
125.9 |
0 |
.1227 |
28.5 |
.1345 |
59.1 |
| Surface mallards |
|
-10% |
125.9 |
0 |
.1230 |
-31.0 |
.1353 |
-65.4 |
|
+10% |
125.9 |
0 |
.1156 |
-31.0 |
.1199 |
-55.9 |
| Percent detectable |
|
-10% |
125.9 |
0 |
.1152 |
34.4 |
.1192 |
61.4 |
|
+10% |
125.9 |
0 |
.1227 |
28.5 |
.1345 |
59.1 |
| Percent to dens |
|
-10% |
125.9 |
0 |
.1152 |
34.4 |
.1192 |
61.4 |
|
+10% |
125.9 |
0 |
.1227 |
28.5 |
.1345 |
59.1 |
| Number of dens |
|
-10% |
125.9 |
0 |
.1230 |
-31.0 |
.1353 |
-65.4 |
|
+10% |
125.9 |
0 |
.1156 |
-31.0 |
.1199 |
-55.9 |
| Sex ratio at dens (% female) |
|
-10% |
125.9 |
0 |
.1056 |
114.8 |
.1357 |
-68.5 |
|
+10% |
125.9 |
0 |
.1334 |
118.2 |
.1203 |
-52.8 |
| Survival rate |
|
male -10% |
99.3 |
18.3 |
.1887 |
-50.3 |
.1390 |
-8.2 |
|
male +10% |
172.5 |
33.0 |
.0524 |
-50.0 |
.1149 |
-8.5 |
|
female -10% |
154.5 |
22.0 |
.1193 |
0 |
.1883 |
47.1 |
|
female +10% |
101.4 |
19.0 |
.1193 |
0 |
.0717 |
42.5 |
|
both -10% |
119.6 |
37.9 |
.1887 |
-440.0 |
.1984 |
-425.3 |
|
both +10% |
134.9 |
70.9 |
.0524 |
-556.3 |
.0574 |
-574.9 |
| Recovery rate |
|
male -10% |
125.9 |
0 |
.1320 |
-106.5 |
|
|
|
male +10% |
125.9 |
0 |
.1063 |
-109.0 |
|
|
|
female -10% |
125.9 |
0 |
|
|
.1349 |
-62.2 |
|
female +10% |
125.9 |
0 |
|
|
.1190 |
-63.0 |
| Crippling loss |
|
-10% |
125.9 |
0 |
.1212 |
-15.9 |
.1282 |
-9.4 |
|
+10% |
125.9 |
0 |
.1174 |
-15.9 |
.1259 |
-8.7 |
| Reporting rate |
|
-10% |
125.9 |
0 |
.1065 |
107.3 |
.1194 |
59.8 |
|
+10% |
125.9 |
0 |
.1297 |
87.2 |
.1332 |
48.8 |
| BOUND |
|
-10% |
125.9 |
0 |
.1193 |
0 |
.1352 |
-64.6 |
|
+10% |
125.9 |
0 |
.1193 |
0 |
.1196 |
-58.3 |
|
Alpha = 1.0 |
125.9 |
0 |
.0808 |
- |
.0872 |
- |
| Recruitment sex ratio |
|
90:100 |
113.4 |
99.3 |
.1193 |
0 |
.1332 |
48.8 |
|
110:100 |
138.4 |
99.3 |
.1193 |
0 |
.1215 |
43.3 |
a Response values for survival rates are measured with respect
to the difference in male and female rates.
Previous Section-- Table 14: Average Rates of Mortality
From Various Causes
Return to Contents
Next Section-- Table 16: Sex Ratios of Prenesting
Mallards in the Northern Prairie Region
