Waterfowl Production on the Woodworth Station in South-central North Dakota,
1965-81
Tables and Figures
Tables
- Table 1 -- Physical characteristics of the Woodworth
Study Area.
- Table 2 -- Long-term mean precipitation and temperature,
Woodworth Study Area.
- Table 3 -- Percent of 548 basins containing water,
Woodworth Study Area, 1965-81.
- Table 4 -- Wetland class: average number and
area during four survey periods, Woodworth Study Area, 1965-75
- Table 5 -- Wetland size: average number and area
during four survey periods, Woodworth Study Area, 1965-75
- Table 6 -- A comparison of three measurement
methods of precipitation or snowfall to early spring and late summer wetland
conditions, Woodworth Study Area.
- Table 7 -- Percent species composition of pairs
of ducks, Woodworth Study Area, 1965-1981.
- Table 8 -- Number of pairs of ducks, Woodworth
Study Area, 1965-81.
- Table 9 -- Mean percent occupancy of wet ponds
by duck pairs of all species on mid-May counts, Woodworth Study Area, 1965-75.
- Table 10 -- Mean percent occupancy of wet ponds
by duck pairs during late May-early June counts, Woodworth Study Area, 1965-75.
- Table 11 -- Mean percent occupancy by duck pairs
in wet ponds by perimeter length during late May-early June counts, Woodworth
Study Area, 1965-75.
- Table 12 -- Mean percent occupancy by duck paors
in wet ponds by size class late May-early June counts, Woodworth Study Area,
1965-75.
- Table 13 -- Regression coefficients for duck
pairs from wetland size, Woodworth Study Area, 1965-75.
- Table 14 -- Correlation coefficients between
duck pairs per year and 1-15 May water counts, Woodworth Stusy Area, 1965-81.
- Table 15 -- Number of duck nests by upland nesting
species and year, Woodworth Study Area, 1966-81.
- Table 16 -- Chronology of hatch dates during
15 years for upland-nesing ducks, Woodworth Study Area, 1967-81.
- Table 17 -- Percent of upland duck nests occurring
by vegetation types, Woodworth Study Area, 1966-81.
- Table 18 -- Percent of Upland duck nests that
occured in subjectively rated cover, Woodworth Study Area, 1966-81.
- Table 19 -- Percent of duck nests found in different
types of cover, Woodworth Study Area, 1966-81.
- Table 20 -- Percent of duck upland nests by
duck species and top concealment, Woodworth Study Area, 1966-81.
- Table 21 -- Percent of upland nests by duck
species and side concealment, Woodworth Study Area, 1966-81.
- Table 22 -- Number and average size of hatched
clutches among habitats and species, Woodworth Study Area, 1966-81.
- Table 23 -- Number of duck nests and average
size of successfully completed clutches among treatments within habitats
by species, Woodworth Study Area, 1966-81
- Table 24 -- Summary of causes of duck nest losses,
Woodworth Study Area, 1966-81.
- Table 25 -- Probably causes of upland nest losses
among ducks, Woodworth Study Area, 1966-81.
- Table 26 -- Upland nest success by duck species
for all years combined, Woodworth Study Area, 1966-81.
- Table 27 -- Nest success by years (n=16) for
all upland-nesting duck species, Woodworth Study Area, 1966-81a.
- Table 28 -- Nest success in three major habitats
for all duck species and years, Woodworth Study Area, 1966-1981a.
- Table 29 -- Percent Mayfield nest success (number
of nests in parentheses) and nest density (nests per 40.5 ha) by field size
class and year, Woodworth Study Area, 1966-81.
- Table 30 -- Densities of upland nests and ducklings
hatched in three habitats, Woodworth Study Area, 1966-81.
- Table 31 -- Apparent upland duck nest densities
for three habitat types, Woodworth Study Area, 1966-81.
- Table 32 -- Percent of upland nest success among
treatments in habitats by duck species, Woodworth Study Area, 1966-81a.
- Table 33 -- Apparent density of upland duck
nests (nest per 40.5 ha) among treatments in habitats by species, Woodworth
Study Area, 1966-81.
- Table 34 -- Average ducklings hatched (ducklings
per 40.5 ha) in habitat treatments by species, Woodworth Study Area, 1966-81.
- Table 35 -- Minimum number of duck broods, Woodworth
Study Area, 1966-81.
- Table 36 -- A comparison of species composition
of all duck broods and esitmated pairs, Woodworth Study Area, 1965-81.
- Table 37 -- Brood densities of 12 duck species,
expressed as broods per 40.5 ha, by wetland size class during July and August,
Woodworth Study Area, 1965-75.
- Table 38 -- Brood densities of 12 duck species,
expresses as broods per 40.5 ha, by wetland class during July and August,
Woodworth Study Area, 1965-75.
- Table 39 -- Linear regression values between
broods per year and percent of wet basins during 1-15 May duck counts, Woodworth
Study Area, 1965-81.
- Table 40 -- Mean cumulative brood size of 12
duck species by age class and month, Woodworth Study Area, 1965-81a.
- Table 41 -- Reduction of brood size of 12 duck
species between age classes, Woodworth Study Area, 1965-81.
- Table 42 -- Reduction of broods size of 12 duck
species between classes for July and August counts, Woodworth Study Area,
1965-81.
- Table 43 -- Estimates of broods per 100 pairs
of ducks, Woodworth Study Area, 1965-81.
- Table 44 -- Averaged production and recruitment
rates of young for 12 duck species, Woodworth Study Area, 1965-81.
- Figure 1 -- Location, Woodworth Study Area,
North Dakota.
- Figure 2 -- Wetland distribution, Woodworth
Study Area.
- Figure 3 -- Primary glacial landforms, Woodworth
Study Area.
- Figure 4 -- Soil associations, federally
owned lands, Woodworth Study Area.
- Figure 5 -- Native grasslands, Woodworth
Study Area.
- Figure 6 -- Schematic of landscape topography
showing positions of high prairie, mid prairie, low prairie, wet meadow,
and wetlands, Woodworth Study Area.
- Figure 7 -- Photographic summary of main
types of land-use treatments and habitats, Woodworth Study Area.
- Figure 8 -- Searching for upland duck nests
with a cable-chain device on the Woodworth Study Area.
- Figure 9 -- Data on duck species, nest
site characteristics, land use, and clutch fate were recorded for each nest
and map plotted at Woodworth Study Area.
- Figure 10 -- Stage of egg-laying or incubation
was determined for each clutch by candling, Woodworth Study Area.
- Figure 11 -- Relation of Dabbling duck
pairs to size and class of wetlands, 1965-75.
- Figure 12 -- Relation of diving duck pairs
to size and class of wetlands, 1965-75.
- Figure 13 -- Comparison of mean pair densities
for all duck species between surface area and shoreline length of wetlands,
Woodworth Study Area, 1965-75.
- Figure 14 -- Breeding duck pairs of all
species in relation to percent of 548 basins with water during 1-15 May,
Woodworth Study Area, 1965-81.
- Figure 15 -- Seasonal nest initiation
chronology of upland nesting ducks, Woodworth Study Area, 1966-81.
- Figure 16 -- Each duck nest found was
assigned to one of eight categories of nest site type, Woodworth Study Area.
- Figure 17 -- Relation of average duck
clutch sizes to nest initiation dates, Woodworth Study Area, 1966-81.
- Figure 18 -- Relation of the daily mortality
rates in relaion to height of vegetation of duck nests by species, Woodworth
Study Area, 1973-81.
- Figure 19 -- Comparison of mean brood
densities of dabbling and diving ducks by size classes of wetlands with
water, Woodworth Study Area, 1965-81.
- Figure 20 -- Broods of all duck species
in relation to percent of 548 basins with water during 1-15 May, Woodworth
Study Area, 1965-81.
Previous Section -- Appendix E.
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