Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 27. Nest success by years (n=16) for all upland-nesting duck species,
Woodworth Study Area, 1966-81a.
Table 27. Nest success by years (n=16) for all upland-nesting duck
species, Woodworth Study Area, 1966-81a.
|
Number of nests |
|
|
Year |
Found |
Destroyed |
Hatched |
Percent apparent success |
Percent Mayfield success |
1966 |
38 |
34 |
4 |
10.5 |
4.6 |
1967 |
117 |
106 |
11 |
9.4 |
4.4 |
1968 |
137 |
113 |
24 |
17.5 |
7.2 |
1969 |
145 |
70 |
75 |
51.7 |
27.6 |
1970 |
279 |
189 |
90 |
32.2 |
11.3 |
1971 |
225 |
109 |
116 |
51.6 |
28.1 |
1972 |
352 |
254 |
98 |
27.8 |
10.9 |
1973 |
183 |
138 |
45 |
24.6 |
9.3 |
1974 |
311 |
188 |
123 |
39.5 |
19.4 |
1975 |
429 |
287 |
142 |
33.1 |
15.9 |
1976 |
359 |
267 |
92 |
25.6 |
11.9 |
1977 |
151 |
81 |
70 |
46.4 |
22.8 |
1978 |
418 |
207 |
211 |
50.5 |
30.3 |
1979 |
140 |
86 |
54 |
38.6 |
22.8 |
1980 |
90 |
64 |
26 |
28.9 |
12.1 |
1981 |
143 |
86 |
57 |
39.9 |
21.5 |
Total |
3,517 |
2,279 |
1,238 |
35.2 |
16.3 |
aNest success among years varied significantly
(X 215= 122.0, P < 0.05).
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