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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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