Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981

Table 28. Nest success in three major habitats for all duck species and years,
Woodworth Study Area, 1966-81a.


Table 28. Nest success in three major habitats for all duck species and years, Woodworth Study Area, 1966-81a.
  Number of nests    
Habitat Found Destroyed Hatched Percent apparent success Percent Mayfield success
Seeded grasslands 1,366 849 501 36.7 17.7
Native prairie 2,081 1,371 710 34.1 15.7
Croplandsb 60 40 20 33.3 12.5
Total 3,507 2,260 1,231 35.2 16.3
aNest success varied among years (X213 = 134.3, P > 0.001) but not between seeded grasslands and native prairie (X21 = 0.02, P > 0.09 ). Interaction between years and habitats was not significant (X213 = 11.01, P > 0.25).
bCategories not included in tests for year and habitat effects because of small or incomplete samples; also, nest data were not available for native prairie in 1979 or 1980.


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