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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, 1966-81^a.

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

	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
Croplands^b	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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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.

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, 1966-81^a.