Northern Prairie Wildlife Research Center
Albers, P. H. 1980. Transfer of crude oil from contaminated water to
bird eggs. Envir. Resour. 22:307-314.
Alison, R. M. 1975. Breeding biology and behavior of the oldsquaw
(Clangula hyemalis L.). Ornithol. Monogr. 18.
Alliston, W. G. 1975. Web-tagging ducklings in pipped eggs. J. Wildl.
Manage. 39:625-628.
-----. 1979. The population ecology of an isolated nesting popula-
tion of redheads (Aythya americana). Dissertation. Cornell Univ.,
Ithaca, New York, USA.
Amat, J. A. 1983. Pursuit flights of mallard and gadwall under differ-
ent environmental conditions. Wildfowl 34:14-19.
Anderson, D. R., & K. P. Burnham. 1976. Population ecology of the
mallard. VI. The effect of exploitation on survival. U.S. Fish Wildl.
Serv. Resour. Publ. 128.
Anderson, D. W., & J. J. Hickey. 1972. Eggshell changes in certain
North American birds. Intern. Ornithol. Congr. 15:514-540.
Anderson, D. W., D. G. Raveling, R. W. Risebrough, & A. M. Springer.
1984. Dynamics of low-level organochlorines in adult cackling geese
over the annual cycle. J. Wildl. Manage. 48:1112-1127.
Anderson, W. 1965. Waterfowl production in the vicinity of gull colo-
nies. Calif. Fish Game J. 51:5-15.
Anderson, W. L. 1978. Waterfowl collisions with power lines at a coal-
fired power plant. Wildl. Soc. Bull. 6:77-83.
Ankney, C. D. 1980. Egg weight, survival, and growth of lesser snow
goose goslings. J. Wildl. Manage. 44:174-182.
Ankney, C. D., & C. D. MacInnes. 1978. Nutrient reserves and repro-
ductive performance of female lesser snow geese. Auk 95:459-471.
Arnold, T. W., & E. K. Fritzell. 1987. Food habits of prairie mink dur-
ing the waterfowl breeding season. Canadian J. Zool. 65:2322-
2324.
Ashworth, W. 1979. The Carson factor. Hawthorn Books, New York,
New York, USA.
Bailey, R. 0., & R. E. Jones. 1976. Mallard mortality in Manitoba's
extended spring muskrat-trapping season. Wildl. Soc. Bull. 4:26-28.
Baker, J. L. 1970. Wood duck brood survival on the Noxubee National
Wildlife Refuge. Proc. Southeastern Assoc. Game Fish Comm.
24:104-108.
Ball, I. J. 1973. Ecology of duck broods in a forest region of north-
central Minnesota. Dissertation. Univ. Minnesota, St. Paul, Minne-
sota, USA.
Ball, I. J., D. S. Gilmer, L. M. Cowardin, & J. H. Riechmann. 1975.
Survival of wood duck and mallard broods in north-central Minne-
sota. J. Wildl. Manage. 39:776-780.
Balser, D. S., H. H. Dill, & H. K. Nelson. 1968. Effect of predator re-
duction on waterfowl nesting success. J. Wildl. Manage. 32:669-
682.
Banko, W. E. 1960. The trumpeter swan -- its history, habits, and pop-
ulation in the United States. North Amer. Fauna 63.
Barry, T. W. 1964. Brant, Ross' goose, and emperor goose. Pages 145-
154 in J. P. Linduska, ed. Waterfowl tomorrow. U.S. Govern. Printing
Off., Washington, D.C., USA.
-----. 1967. The geese of the Anderson River Delta, Northwest Ter-
ritories. Dissertation. Univ. Alberta, Edmonton, Alberta, Canada.
-----. 1968. Observations on natural mortality and native use of ei-
der ducks along the Beaufort Sea Coast. Canadian Field-Nat.
82:140-144.
Bartonek, J. C., & D. L. Trauger. 1975. Leech (Hirudinea) infestations
among waterfowl near Yellowknife, Northwest Territories. Canadian
Field-Nat. 89:234-243.
Batt, B. D. J., & G. W. Cornwell. 1972. The effects of cold on mallard
embryos. J. Wildl. Manage. 36:745-751.
Beetz, J. 1916. Notes on the eider. Auk 33:286-291.
Bellrose, F. C. 1980. Ducks, geese and swans of North America. Stack-
pole Books, Harrisburg, Pennsylvania, USA.
Bellrose, F. C., K. L. Johnson, & T. U. Meyers. 1964. Relative value of
natural cavities and nesting houses for wood ducks. J. Wildl. Man-
age. 28:661-676.
Bennett, L. J. 1938. The blue-winged teal, its ecology and manage-
ment. Collegiate Press, Ames, Iowa, USA.
Bird, R. D. 1961. Ecology of the aspen parkland of western Canada in
relation to land use. Canadian Dep. Agr. Publ. 1066.
Bishop, R. A., & R. Barratt. 1970. Use of artificial nest baskets by
mallards. J. Wildl. Manage. 34:734-738.
Blohm, R. J., F. Van Dyke, & B. C. Livezey. 1980. Marsh hawks feed-
ing on waterfowl. Wilson Bull. 92:251-252.
Blohm, R. J., R. E. Reynolds, J. P. Bladen, J. D. Nichols, J. E. Hines, K.
E. Pollock, & R. T. Eberhardt. 1987. Mallard mortality rates on key
breeding and wintering areas. Trans. North Amer. Wildl. & Nat. Re-
sour. Conf. 52:246-257.
Blus, L. J., C. J. Henny, D. J. Lenhart, & E. Cromartie. 1979. Effects of
heptachlor-treated cereal grains on Canada geese in the Columbia
Basin. Pages 105-116 in R. L. Jarvis & J. C. Bartonek, eds. Manage-
ment and biology of Pacific Flyway geese. Oregon State Univ. Book-
stores, Inc., Corvallis, Oregon, USA.
Bolen, E. G. 1967. Nesting boxes for black-bellied tree ducks. J. Wildl.
Manage. 31:794-797.
Bouffard, S. H., D. E. Sharp, & C. C. Evans. 1987. Overwater nesting
by ducks: a review and management implications. Proc. Great Plains
Wildl. Damage Control Workshop 8:153-157.
Bousfield, M. A., & Ye. V. Syroechkovskiy. 1985. A review of Soviet
research on the lesser snow goose on Wrangel Island, U.S.S.R. Wild-
fowl 36:13-20.
Boyd, H. 1961. Reported casualties to ringed ducks in the spring and
summer. Wildfowl Trust Ann. Rep. 12:144-146.
-----. 1977. Waterfowl hunting by native peoples in Canada: the
case of James Bay and northern Quebec. Intern. Cong. Game Biol.
13:463-473.
Brakhage, G. K. 1965. Biology and behavior of tub-nesting Canada
geese. J. Wildl. Manage. 29:751-771.
Brand, C. J. 1984. Avian cholera in the central and Mississippi flyways
during 1979-80. J. Wildl. Manage. 48:399-406.
Braun, B. M., P. A. Heinz, & G. H. Heinz. 1980. Herring gull preda-
tion on red-breasted merganser ducklings. Wilson Bull. 92:403.
Braun, C. E., K. W. Harmon, J. A. Jackson, & C. D. Littlefield. 1978.
Management of National Wildlife Refuges in the United States: its
impacts on birds. Wilson Bull. 90:309-321.
Brown, B. W. 1972. The Big Lake wood duck: a two-year study of its
pre-flight mortality, nesting population growth and migration,
1970-71. Proc. Southeastern Assoc. Game Fish Comm. 26:195-202.
Brown, P. W, & M. A. Brown. 1981. Nesting biology of the white-
winged scoter. J. Wildl. Manage. 45:38-45.
Brown, P. W. & M. L. Hunter, Jr. 1984-85. Potential effects of insec-
ticides on the survival of dabbling duck broods. J. Minnesota Acad.
Sci. 50:41-45.
Cain, B. 1972. Cold hardiness and development of homeothermy in
young black-bellied tree ducks. Wilson Bull. 84:483-485.
-----. 1973. Effect of temperature on energy requirements and
northward distribution of the black-bellied tree duck. Wilson Bull.
85:308-317.
Caldwell, P. J., & A. E. Snart. 1974. A photographic index for aging
mallard embryos. J. Wildl. Manage. 38:298-301.
Calverley, B. K., & D. A. Boag. 1977. Reproductive potential in park-
land and arctic-nesting populations of mallards and pintails
(Anatidae). Canadian J. Zool. 55:1242-1251.
Canadian Wildlife Service & U.S. Fish & Wildlife Service. 1986.
North American waterfowl management plan. Canadian Wildl.
Serv., Ottawa, Canada, & U.S. Fish Wildl. Serv., Washington, D.C.,
USA.
Canadian Wildlife Service & U.S. Fish & Wildlife Service. 1987. Draft
report--stabilized duck hunting regulations evaluation. Canadian
Wildl. Serv., Ottawa, Canada, & U.S. Dep. Int., Fish Wildl. Serv.,
Washington, D.C., USA.
Choate, J. S. 1967. Factors influencing nesting success of eiders in Pe-
nobscot Bay, Maine. J. Wildl. Manage. 31:769-777.
Cooch, F. G. 1958. The breeding biology and management of the blue
goose Cben caerulescens. Dissertation. Cornell Univ., Ithaca, New
York, USA.
-----. 1961. Ecological aspects of the blue-snow goose complex.
Auk 78:72-89.
-----. 1965. The breeding biology and management of the northern
eider (Somateria mollissima borealis) in the Cape Dorset area,
Northwest Territories. Canadian Wildl. Serv. Wildl. Manage. Bull.,
Series 2, No. 10.
-----. 1986. The current status of goose populations in Canada.
Trans. North Amer. Wildl. & Nat. Resour. Conf. 51:480-486.
Cook, G. F. 1986. Alaska waterfowl management and the law. Trans.
North Amer. Wildl. & Nat. Resour. Conf. 51:516-526.
Cooke, A. S. 1973. Shell thinning in avian eggs by environmental pol-
lutants. Environ. Poll. 4:85-152.
Cooper, J. A. 1978. The history and breeding biology of the Canada
geese of Marshy Point, Manitoba. Wildl. Monogr. 61.
Cornely, J. E., S. P. Thompson, E. L. McLaury, & L. D. Napier. 1985a.
A summary of trumpeter swan production at Malheur National
Wildlife Refuge, Oregon. Murrelet 66:50-55.
Cornely, J. E., B. H. Campbell, & R. L. Jarvis. 1985b. Productivity,
mortality and population status of dusky Canada geese. Trans.
North Amer. Wildl. & Nat. Resour. Conf. 50:540-548.
Cornwell, G., & H. A. Hochbaum. 1971. Collisions with wires -- a
source of anatid mortality. Wilson Bull. 83:305-306.
Cott, H. B. 1953/1954. The exploitation of wild birds for their eggs.
Ibis 95:409-449, 643-675; 96:129-149.
Cowan, W. F. 1982. Waterfowl production on zero tillage farms. Wildl.
Soc. Bull. 10:305-308.
Cowardin, L. M., & D. H. Johnson. 1979. Mathematics and mallard
management. J. Wildl. Manage. 43:18-35.
Cowardin, L. M., D. H. Johnson, A. M. Frank, & A. T. Klett. 1983a.
Simulating results of management actions on mallard production.
Trans. North Amer. Wildl. & Nat. Resour. Conf. 48-.257-272.
Cowardin, L. M., A. B. Sargeant, & H. E Duebbert. 1983b. Problems
and potentials for prairie ducks. Naturalist 34(4):4-11.
Cowardin, L. M., D. S. Gilmer, & C. W Shaiffer. 1985. Mallard re-
cruitment in the agricultural environment of North Dakota. Wildl.
Monogr. 92.
Crabtree, R. L., & M. L. Wolfe. 1988. Effects of alternate prey on
skunk predation on waterfowl nests. Wildl. Soc. Bull. 16:163-169.
Crissey, W. F. 1969. Prairie potholes from a continental viewpoint.
Pages 161-171 in Saskatoon Wetlands Seminar. Canadian Wildl.
Serv. Rep. Series 6.
Dane, C. W., & G. L. Pearson. 1971. Effect of a spring storm on wa-
terfowl mortality and breeding activity. Pages 258-267 in A. 0. Hau-
gen, ed. Proc., snow and ice in relation to wildlife and recreation
symposium. Iowa State Univ., Ames, Iowa, USA.
Davison, K. L., & J. L. Sell. 1974. DDT thins shells of eggs from mal-
lard ducks maintained on ab libitum or controlled-feeding regimens.
Arch. Environ. Contamination & Toxicol. 2:222-232.
Dekker, D. 1987. Peregrine falcon predation on ducks in Alberta and
British Columbia. J. Wildl. Manage. 51:156-159.
Doty, H. A., F. B. Lee, & A. D. Kruse. 1975. Use of elevated nest bas-
kets by ducks. Wildl. Soc. Bull. 3:68-73.
Dow, J. S. 1943. A study of nesting Canada geese in Honey Lake Val-
ley, California. California Fish Game 29:3-18.
Duebbert, H. F. 1966. Island nesting of the gadwall in North Dakota.
Wilson Bull. 78:12-25.
-----. 1969. High nest density and hatching success of ducks on
South Dakota CAP lands. Trans. North Amer. Wildl. & Nat. Resour.
Conf. 34:218-228.
-----. 1982. Nesting of waterfowl on islands in Lake Audubon,
North Dakota. Wildl. Soc. Bull. 10:232-237.
Duebbert, H. R, & H. A. Kantrud. 1974. Upland duck nesting related
to land use and predator reduction. J. Wildl. Manage. 38:257-265.
Duebbert, H. F. & H. A. Kantrud. 1987. Use of no-till winter wheat
by nesting ducks in North Dakota. J. Soil & Water Consem 42:50-
53.
Duebbert, H. F., & J. T. Lokemoen. 1976. Duck nesting in fields of
undisturbed grass-legume cover. J. Wildl. Manage. 40:39-49.
Duebbert, H. F., & J. T. Lokemoen. 1980. High duck nesting success
in a predator-reduced environment. J. Wildl. Manage. 44:428-437.
Duebbert, H. F., J. T. Lokemoen, & D. E. Sharp, 1983. Concentrated
nesting of mallards and gadwalls on Miller Lake Island. J. Wildl.
Manage. 47:729-740.
Duebbert, H. F., J. T. Lokemoen, & D. E. Sharp. 1986. Nest sites of
ducks in grazed mixed-grass prairie in North Dakota. Prairie Nat.
18:99-108.
Duncan, D. C. 1986, Survival of dabbling duck broods on prairie im-
poundments in southeastern Alberta. Canadian Field-Nat. 100:110-
113.
Dwernychuk, L. W., & D. A. Boag. 1972. Ducks nesting in association
with gulls -- an ecological trap? Canadian J. Zool. 50:559-563.
Dzubin, A., & J. B. Gollop. 1972. Aspects of mallard breeding ecology
in Canadian parkland and grassland. Pages 113-152 in Population
ecology of migratory birds: a symposium. U.S. Fish Wildl. Serv.
Wildl. Res. Rep. 2.
Dzubin, A., H. W. Miller, & G. V. Schildman. 1964. White-fronts.
Pages 135-143 in J. P. Linduska, ed. Waterfowl tomorrow. U.S. Gov-
ern. Printing Off., Washington, D.C., USA.
Eberhardt, L. E., & A. B. Sargeant. 1977. Mink predation on prairie
marshes during the waterfowl breeding season. Pages 33-43 in R. L.
Phillips & C. Jonkel, eds. Proc. 1975 predator symposium. Univ.
Montana, Missoula, Montana, USA.
Eberhardt, L. E., W. C. Hanson, J. L. Bengtson, R. A. Garrott, & E. E.
Hanson. 1982. Arctic fox home range characteristics in an oil-devel-
opment area. J. Wildl. Manage. 46:183-190.
Eberhardt, L. E., R. A. Garrott, & W. C. Hanson. 1983. Den use by
arctic foxes in northern Alaska. J. Mammal. 64:97-102.
Eberhardt, R. T., & M. L. Sperry. 1986. Age related productivity in
ring-necked ducks. Page 23 in B. J. Joselyn, compiler. Summaries of
wildlife research project findings 1985. Unpubl. Rep. Minnesota
Dep. Nat. Resour., 1 October. St. Paul, Minnesota, USA.
Eisenhauer, D. I., & C. M. Kirkpatrick. 1977. Ecology of the emperor
goose in Alaska. Wildl. Monogr. 57.
Eisenhauer, J. H. 1977. Nesting ecology and behavior of Pacific brant
in Alaska. Baccalaureate Thesis. Univ. Lethbridge, Alberta, Canada.
Ely, C. R., & D. G. Raveling. 1984. Breeding biology of pacific white-
fronted geese. J.Wildl. Manage. 48:823-837.
Ely, C. R., D. A. Budean, & U. G. Swain. 1987. Aggressive encounters
between tundra swans and greater white-fronted geese during brood
rearing. Condor 89:420-422.
Erskine, A. J. 1971. Buffleheads. Canadian Wildl. Serv. Monogr. Se-
ries, No. 4.
Evans, R. D., & C. W. Wolfe, Jr. 1967. Waterfowl production in the
rainwater basin area of Nebraska. J. Wildl. Manage. 31:788-794.
Ewaschuk, E., & D. A. Boag. 1972. Factors affecting hatching success
of densely nesting Canada geese. J. Wildl. Manage. 36:1097-1106.
Faanes, C. A. 1987. Bird behavior and mortality in relation to power-
lines in prairie habitats. U.S. Fish Wildl. Serv. Tech. Rep. 7.
Faber, R. A., & J. J. Hickey. 1973. Eggshell thinning, chlorinated hy-
drocarbons, and mercury in inland aquatic bird eggs, 1969 and
1970. Pest. Monitor J. 7:27-36.
Fimreite, N. 1974. Mercury contamination of aquatic birds in north-
western Ontario. J. Wildl. Manage. 38:120-131.
Fleskes, J. P. 1986. Evaluation of waterfowl recruitment at Union
Slough National Wildlife Refuge. Thesis. Iowa State Univ., Ames,
Iowa, USA.
Friend, M. 1981. Waterfowl management and waterfowl disease: in-
dependent or cause and effect relationships? Trans. North Amer.
Wildl. & Nat. Resour. Conf. 46:94-103.
Fyfe, R. W. 1957. Hail damage in the June 17 storm. Blue Jay 15:170-
171.
Gates, J. M. 1965. Duck nesting and production on Wisconsin farm-
lands. J. Wildl. Manage. 29:515-522.
Geis, M. B. 1956. Productivity of Canada geese in the Flathead Valley,
Montana. J. Wildl. Manage. 20:409-419.
Gershman, M., J. E. Witter, H. E. Spencer, Jr., & A. Kalvaitis. 1964.
Case report: epizootic of fowl cholera in the common eider duck. J.
Wildl. Manage. 28:587-589.
Glover, F. A., & J. D. Smith. 1963. Waterfowl status report, 1963. U.S.
Fish Wildl. Serv. Spec. Sci. Rep. -- Wildl. 75.
Glup, S. S., & L. L. McDaniel. 1988. Bullsnake predation on water-
fowl nests on Valentine National Wildlife Refuge, Nebraska. Proc.
Great Plains Wildl. Damage Control Workshop 8:149-152.
Greenburg, R. R., R. W Risebrough, & D. W Anderson. 1979. P-P'-
DDE-induced changes in the organic and inorganic structure of egg-
shells of the mallard, Anas platyrbynchos. Toxicol. & Applied
Pharmacol. 48:279-286.
Greenwood, R. J. 1969. Mallard hatching from an egg cracked by
freezing. Auk 86:752-754.
-----. 1986. Influence of striped skunk removal on upland duck nest
success in North Dakota. Wildl. Soc. Bull. 14:6-11.
Grice, D., & J. P. Rogers. 1965. The wood duck in Massachusetts. Fi-
nal Report, Federal Aid in Wildlife Restoration, Project Number
W19-R, Massachusetts Div. Fisheries & Game.
Gross, A. 0. 1944. The present status of the American eider on the
Maine coast. Wilson Bull. 56:15-26.
Grue, C. E., L. R. Deweese, P. Mineau, G. A. Swanson, J. R. Foster, P.
M. Arnold, J. N. Huckins, P. J. Sheehan, W. K. Marshall, & A. P.
Ludden. 1986. Potential impacts of agricultural chemicals on water-
fowl and other wildlife inhabiting prairie wetlands: an evaluation of
research needs and approaches. Trans. North Amer. Wildl. & Nat.
Resour. Conf. 51:357-383.
Grue, C. E., M. W. Tome, G. A. Swanson, S. M. Borthwick, & L. R.
Deweese. 1988. Agricultural chemicals and the quality of prairie-
pothole wetlands for adult and juvenile waterfowl -- what are the
concerns? Pages 55-64 in P. J. Stuber, coordinator. Proc. National
Symp. Protection of Wetlands from Agricul. Impacts. U.S. Fish Wildl.
Serv. Biol. Rep. 88(16).
Gudmundsson, F. 1979. The past status and exploitation of the My-
vatn waterfowl populations. Oikos 32:232-249.
Haines, T. A., & M. L. Hunter, Jr. 1981. Waterfowl and their habitat:
threatened by acid rain? Intern. Waterfowl Symp. 4:177-188.
Hall, E. R. 1981. The mammals of North America. Volume 2. John
Wiley & Son, New York, New York, USA.
Hammond, M. C., & W. R. Forward. 1956. Experiments on causes of
duck nest predation. J. Wildl. Manage. 20:243-247.
Hansen, H. A. 1961. Loss of waterfowl production to tide floods. J.
Wildl. Manage. 25:242-248.
Hansen, H. A., P. E. K. Shepherd, J. G. King, & W. A. Troyer. 1971.
The trumpeter swan in Alaska. Wildl. Monogr. 26.
Hanson, H. C. 1965. The giant Canada goose. Southern Illinois Univ.
Press, Carbondale, Illinois, USA.
Hanson, H. C., P. Queneau, & P. Scott. 1956. The geography, birds
and mammals of the Perry River region. Arctic Inst. North Amer.
Spec. Publ. 3.
Hanson, W. C., & L. L. Eberhardt. 1971. A Columbia River Canada
goose population 1950-1970. Wildl. Monogr. 28.
Haramis, G. M., & D. S. Chu. 1986. Acid rain effects on waterfowl:
use of black duck broods to assess food resources of experimentally
acidified wetlands. Pages 173-181 in A. W. Diamond and F. L. Filion,
eds., The value of birds. Intern. Council Bird Preserv. Tech. Publ. No.
6.
Haramis, G. M., & D. Q. Thompson. 1984. Survival of juvenile wood
ducks in a northern greentree impoundment. J. Wildl. Manage.
48:1364-1369.
Harvey, J. M. 1971. Factors affecting blue goose nesting success. Ca-
nadian J. Zool. 49:223-234.
Haseltine, S. D., B. M. Mulhern, & C. Stafford. 1980. Organochlorine
and heavy metal residues in black duck eggs from the Atlantic Fly-
way, 1978. Pest. Monitor J. 14:53-57.
Heath, R. G. 1969. Nationwide residues of organochlorine pesticides
in wings of mallards and black ducks. Pest. Monitor J. 3:115-123.
Heath, R. G., J. W. Spann, & J. F. Kreitzer. 1969. Marked DDE im-
pairment of mallard reproduction in controlled studies. Nature
224:47-48.
Heinz, G. 1975. Effects of methylmercury on approach and avoidance
behavior of mallard ducklings. Bull. Environ. Contamination & Tox-
icol. 13:554-564.
Herman, C. M., J. H. Barrow, Jr., & I. B. Tarshis. 1975. Leucocytozoo-
nosis in Canada geese at the Seney National Wildlife Refuge. J.
Wildl. Diseases 11:404-411.
Heusmann, H. W. 1984. The effects of weather on local wood duck
production. J. Wildl. Manage. 48:573-577.
Hickey, J. J., & D. W. Anderson. 1968. Chlorinated hydrocarbons and
eggshell changes in raptorial and fish-eating birds. Science 162:271-
273.
Higgins, K. F. 1977. Duck nesting in intensively farmed areas of North
Dakota. J. Wildl. Manage. 41:232-242.
Hik, D. S., & F. Cooke. 1988. A possible case of intraspecific killing in
the lesser snow goose. Wilson Bull. 100:665-666.
Hilden, O. 1964. Ecology of duck populations in the island group of
Valassaaret, Gulf of Bothnia. Annales Zool. Fennici 1:153-279.
Hill, D., R. Wright, & M. Street. 1987. Survival of mallard ducklings
Anas platyrhynchos and competition with fish for invertebrates on a
flooded gravel quarry in England. Ibis 129:159-167.
Hines, J. E., & G. J. Mitchell. 1983. Breeding ecology of the gadwall at
Waterhen Marsh, Saskatchewan. Canadian J. Zool. 61:1532-1539.
Hunter, M. L., Jr., J. W. Witham, & H. Dow. 1984. Effects of a car-
baryl-induced depression in invertebrate abundance on the growth
and behavior of American black duck and mallard ducklings. Cana-
dian J. Zool. 62:452-456.
Jahn, L. R., & R. A. Hunt. 1964. Duck and coot ecology and manage-
ment in Wisconsin. Wisconsin Conser. Dep. Tech. Bull. 33.
Jarvis, R. L., & S. W. Harris. 1971. Land-use patterns and duck pro-
duction at Malheur National Wildlife Refuge. J. Wildl. Manage.
35:767-773.
Johnson, D. H. 1979. Estimating nest success: the Mayfield method
and an alternative. Auk 96:651-661.
Johnson, D. H., & A. T. Klett. 1985. Quick estimates of success rates
of duck nests. Wildl. Soc. Bull. 13:51-53.
Johnson, D. H., & A. B. Sargeant. 1977. Impact of red fox predation
on the sex ratio of prairie mallards. U.S. Fish Wildl. Serv. & Wildl.
Res. Rep. 6.
Johnson, D. H., & T. L. Shaffer. 1987. Are mallards declining in North
America? Wildl. Soc. Bull. 15:340-345.
Johnson, M. A., T. C. Hinz, & T. L. Kuck. 1987. Duck nest success
and predators in North Dakota, South Dakota, and Montana: the
Central Flyway study. Proc. Great Plains Wildl. Damage Control
Workshop 8:125-133.
Jones, J. K., Jr., D. M. Armstrong, R. S. Hoffmann, & C. Jones. 1983.
Mammals of the northern Great Plains. Univ. Nebraska Press, Lin-
coln, Nebraska, USA.
Kalmbach, E. R. 1937. Crow-waterfowl relationships in the prairie
provinces. Trans. North Amer. Wildl. Conf. 2:380-392.
-----. 1938. A comparative study of nesting waterfowl on the Lower
Souris Refuge: 1936-1937. Trans. North Amer. Wildl. Conf. 3:610-
623.
-----. 1939. Nesting success: its significance in waterfowl reproduc-
tion. Trans. North Amer. Wildl. Conf. 4:591-604.
Kear, J. 1965. The internal food reserves of hatching mallard duck-
lings. J. Wildl. Manage. 29:523-528.
Keith, L. B. 1961. A study of waterfowl ecology on small impound-
ments in southeastern Alberta. Wildl. Monogr. 6.
Kelso, D. D. 1982. Subsistence use of fish and game resources in
Alaska: considerations in formulating effective management poli-
cies. Trans. North Amer. Wildl. & Nat. Resour. Conf. 47:630-640.
Kerbes, R. H. 1969. Biology and distribution of nesting blue geese on
Koukdjuak Plain, Baffin Island, N.W.T. Thesis. Univ. Western On-
tario, London, Ontario, Canada.
Kiel, W. H., Jr., A. S. Hawkins, & N. G. Parret. 1972. Waterfowl hab-
itat trends in the aspen parkland of Manitoba. Canadian Wildl. Serv.
Rep. Series 18.
King, J. G. 1965. Storm driven flood tides on the Clarence Rhode Na-
tional Wildlife Range. U.S. Bur. Sport Fish. & Wildl. Files, Bethel,
Alaska, USA.
King, J. G., & D. V. Derksen. 1986. Alaska goose populations: past,
present and future. Trans. North Amer. Wildl. & Nat. Resour. Conf.
51:464-479.
Kirby, R. E., & L. M. Cowardin. 1986. Spring and summer survival of
female mallards from northcentral Minnesota. J. Wildl. Manage.
50:38-43.
Klein, D. R. 1966. Waterfowl in the economy of the Eskimos on the
Yukon-Kuskokwim Delta, Alaska. Arctic 19:319-336.
Klett, A. T., & D. H. Johnson. 1982. Variability in nest survival rates
and implications to nesting studies. Auk 99:77-87.
Klett, A. T., H. R. Duebbert, C. A. Faanes, & K. F. Higgins. 1986. Tech-
niques for studying nest success of ducks in upland habitats in the
prairie pothole region. U.S. Fish Wildl. Serv. Resour. Publ. 158.
Klett, A. T., T. L. Shaffer, & D. H. Johnson. 1988. Duck nest success in
the prairie pothole region. J. Wildl. Manage. 52:431-440.
Knight, O. W. 1895. Breeding of Somateria dresseri near Isle au Haut,
Maine. Auk 12:388.
Korschgen, C. E. 1977. Breeding stress of female eiders in Maine. J.
Wildl. Manage. 41:360-373.
Korschgen, C. E., H. C. Gibbs, & H. L. Mendall. 1978. Avian cholera
in eider ducks in Maine. J. Wildl. Disease 14:254-258.
Koskimies, J. 1954. Juvenile mortality and population balance in the
velvet scoter (Melanitta fusca) in maritime conditions. Proc. Intern.
Ornithol. Congr. 11:476-479.
Koskimies, J., & L. Lahti. 1964. Cold-hardiness of the newly hatched
young in relation to ecology and distribution in ten species of Euro-
pean ducks. Auk 81:281-307.
Krapu, G. L. 1974. Avian mortality from collisions with overhead
wires in North Dakota. Prairie Nat. 6:1-6.
-----. 1977. Pintail reproduction hampered by snowfall and agricul-
ture. Wilson Bull. 89:154-157.
Krapu, G. L., G. A. Swanson, & H. K. Nelson. 1973. Mercury resi-
dues in pintails breeding in North Dakota. J. Wildl. Manage.
37:395-399.
Krohn, W. B., & E. G. Bizeau. 1980. The Rocky Mountain population
of the western Canada goose: its distribution, habitats, and manage-
ment. U.S. Fish Wildl. Serv. Spec. Sci. Rep. 229.
Labisky, R. F. 1957. Relation of hay harvesting to duck nesting under
a refuge-permittee system. J. Wildl. Manage. 21:194-200.
Larson, S. 1960. On the influence of the arctic fox Alopex lagopus on
the distribution of arctic birds. Oikos 11:276-305.
Lehner, P. N., & A. Egbert. 1969. Dieldrin and eggshell thickness in
ducks. Nature 224:1218-1219.
Lemieux, L. 1959. The breeding biology of the greater snow goose on
Bylot Island, Northwest Territories. Canadian Field-Nat. 73:117-
128.
Lensink, C. J. 1973. Population structure and productivity of whis-
tling swans on the Yukon Delta, Alaska. Wildfowl 24:21-25.
Livezey, B. C. 1981. Duck nesting in retired croplands at Horicon Na-
tional Wildlife Refuge, Wisconsin. J. Wildl. Manage. 45:27-37.
Lokemoen, J. T. 1984. Examining economic efficiency of management
practices that enhance waterfowl production. Trans. North Amer.
Wildl. & Nat. Resour. Conf. 49:584-607.
Lokemoen, J. T., H. A. Doty, D. E. Sharp, & J. E. Neaville. 1982. Elec-
tric fences to reduce mammalian predation on waterfowl nests.
Wildl. Soc. Bull. 10:318-323.
Longcore, J. R., & F. B. Samson. 1973. Eggshell breakage by incubat-
ing black ducks fed DDE. J. Wildl. Manage. 37:390-394.
Longcore, J. R., & R. C. Stendell. 1982. Black ducks and DDE: review
and status. Trans. Northeast Sect. Wildl. Soc. 39:68-75.
Longcore, J. R., F. B. Samson, & T. W. Whittendale, Jr. 1971. DDE
thins eggshells and lowers reproductive success of captive black
ducks. Bull. Environ. Contamination & Toxicol. 6:485-490.
Longcore, J. R., J. D. Heyland, A. Reed, & P. Laporte. 1983. Contam-
inants in greater snow geese and their eggs. J. Wildl. Manage.
47:1105-1109.
McAloney, R. K. 1973. Brood ecology of the common eider (Somate-
ria mollissima dresseri) in the Liscombe area of Nova Scotia. Thesis.
Acadia Univ., Wolfville, Nova Scotia, Canada.
McAuley, D. G., & J. R. Longcore. 1988. Survival of juvenile ring-
necked ducks on wetlands of different pH. J. Wildl. Manage.
52:169-176.
McCorkle, C. 0., & J. E. Halver (committee co-chairmen). 1982. Im-
pacts of agricultural trends on interior wetland habitats. Pages 221-
252 in Impacts of emerging agricultural trends on fish and wildlife
habitat. National Acad. Press, Washington, D.C., USA.
McGilvrey, F. B. 1969. Survival in wood duck broods. J. Wildl. Man-
age. 33:73-76.
MacInnes, C. D. 1962. Nesting of small Canada geese near Eskimo
Point, Northwest Territories. J. Wildl. Manage. 26:247-256.
MacInnes, C. D., & R. K. Misra. 1972. Predation on Canada goose
nests at McConnell River, Northwest Territories. J. Wildl. Manage.
36:414-422.
MacInnes, C. D., R. A. Davis, R. N. Jones, B. C. Lieff, & A. J. Paku-
lak. 1974. Reproductive efficiency of McConnell River small Can-
ada geese. J. Wildl. Manage. 38:686-707.
McInvaille, W. B., Jr., & L. B. Keith. 1974. Predator-prey relations and
breeding biology of the great horned owl and red-tailed hawk in cen-
tral Alberta. Canadian Field-Nat. 88:1-20.
McKinney, F., S. R. Derrickson, & P. Mineau. 1983. Forced copulation
in waterfowl. Behaviour 86:250-294.
McLandress, M. R. 1983. Temporal changes in habitat selection and
nest spacing in a colony of Ross' and lesser snow geese. Auk
100:335-343.
MacLennan, R. 1977. Reproductive ecology of ducks on an irrigated
hay marsh. Saskatchewan Dep. Tourism & Renewable Resour. Tech.
Bull. 4.
Malcolm, J. M. 1982. Bird collisions with a power transmission line
and their relation to botulism at a Montana wetland. Wildl. Soc.
Bull. 10:297-304.
Mann, G. H. 1974. The prairie pothole region: a zone of environmen-
tal opportunity. Naturalist 25(4):2-7.
Manning, T. H. 1942. Blue and lesser snow geese on Southampton and
Baffin Islands. Auk 59:158-175.
Marcstrom, V. 1966. Mallard ducklings (Anas platyrhynchos L.) dur-
ing the first days after hatching. Viltrevy 4:343-370.
Mayfield, H. 1961. Nesting success calculated from exposure. Wilson
Bull. 73:255-261.
-----. 1975. Suggestions for calculating nest success. Wilson Bull.
87:456-466.
Meltofte, H. 1978. A breeding association between ciders and tethered
huskies; in north-east Greenland. Wildfowl 29:45-54.
Mendall, H. L. 1958. The ring-necked duck in the northeast. Univ.
Maine Bull. 60(16).
Mendenhall, V. M. 1979. Brooding of young ducklings by female ei-
ders Somateria mollissima. Ornis Scand. 10:94-99.
Mendenhall, V. M., & H. Milne. 1985. Factors affecting duckling sur-
vival of ciders Somateria mollissima in northeast Scotland. Ibis
127:148-158.
Mickelson, P. G. 1975. Breeding biology of cackling geese and associ-
ated species on the Yukon-Kuskokwirn Delta, Alaska. Wildl.
Monogr. 45.
Miller, H. W. & D. H. Johnson. 1978. Interpreting the results of nest-
ing studies. J. Wildl. Manage. 42:471-476.
Milne, H. 1974. Breeding numbers and reproductive rate of ciders at
the sands of Forvie National Nature Reserve, Scotland. Ibis
116:135-154.
Milonski, M. 1958. The significance of farmland for waterfowl nest-
ing and techniques for reducing losses due to agricultural practices.
Trans. North Amer. Wildl. Conf. 23:215-228.
Mitchell, D. C. 1986. Native subsistence hunting of migratory water-
fowl in Alaska: a case study demonstrating why politics and wildlife
management don't mix. Trans. North Amer. Wildl. & Nat. Resour.
Conf. 51:527-534.
Mora, M. A., D. W. Anderson, & M. E. Mount. 1987. Seasonal vari-
ation of body condition and organochlorines in wild ducks from
California and Mexico. J. Wildl. Manage. 51:132-141.
Moyle, J. B., ed. 1964. Ducks and land use in Minnesota. Minnesota
Dep. Conserv. Tech. Bull. 8.
Munro, D. A. 1963. Ducks and the great plains wetlands. Canadian
Audubon Magaz. September-October:2-8.
Murie, 0. J. 1959. Fauna of the Aleutian Islands and Alaska penin-
sula. North Amer. Fauna 61.
Nelson, R. K. 1969. Hunters of the northern ice. Univ. Chicago Press,
Chicago, Illinois, USA.
Newton, I., & C. R. G. Campbell. 1975. Breeding of ducks at Loch
Leven, Kinross. Wildfowl 26:83-102.
Nichols, J. D., M. J. Conroy, D. R. Anderson, & K. P. Burnham. 1984.
Compensatory mortality in waterfowl populations: a review of the
evidence and implications for research and management. Trans.
North Amer. Wildl. & Nat. Resour. Conf. 49:535-554.
Nigus, T. A., & J. J. Dinsmore. 1980. Productivity of Canada geese in
northwestern Iowa. Proc. Iowa Acad. Sci. 87:56-61.
Oetting, R. B., & J. F. Cassell. 1971. Waterfowl nesting on interstate
highway right-of-way in North Dakota. J. Wildl. Manage. 35:774-
781.
Oetting, R. B., & C. C. Dixon. 1975. Waterfowl nest densities and suc-
cess at Oak Hammock Marsh, Manitoba. Wildl. Soc. Bull. 3:166-
171.
Ogilvie, M. A. 1967. Population changes and mortality of the mute
swan in Britain. Wildfowl Trust Ann. Rep. 18:64-73.
-----. 1978. Wild geese. Buteo Books, Vermillion, South Dakota,
USA.
Ohlendorf, H. M., & M. R. Miller. 1984. Organochlorine contami-
nants in California waterfowl. J. Wildl. Manage. 48:867-877.
Ohlendorf, H. M., R. L. Hothem, C. M. Bunck, T. W Aldrich, & J. E
Moore. 1986. Relationships between selenium concentrations and
avian reproduction. Trans. North Amer. Wildl. & Nat. Resour. Conf.
51:330-342.
Orthmeyer, D. L. 1987. Survival of mallard broods on Benton Lake
National Wildlife Refuge in north-central Montana. Thesis. Univ.
Montana, Missoula, Montana, USA.
Owen, M. 1980. Wild geese of the world. B. T. Batsford Limited, Lon-
don, England.
Page, R. D. 1974. The ecology of the trumpeter swan on Red Rock
Lakes National Wildlife Refuge, Montana. U.S. Fish Wildl. Serv. Fi-
nal Rep., Region 1.
Pakulak, A. J. 1969. Nesting ecology of Canada geese of the Churchill
area, northern Manitoba. Thesis. Colorado State Univ., Fort Collins,
Colorado, USA.
Palmer, R. S., ed. 1976. Handbook of North American birds. Volumes
2 and 3. Yale Univ. Press, New Haven, Connecticut, USA.
Pamplin, W., L., Jr. 1986. Cooperative efforts to halt population de-
clines of geese nesting on Alaska's Yukon-Kuskokwim Delta. Trans.
North Amer. Wildl. & Nat. Resour. Conf. 51:487-506.
Pehrsson, O. 1986. Duckling production of the oldsquaw in relation
to spring weather and small rodent fluctuations. Canadian J. Zool.
64:1835-1841.
Peterson, R. W., J. A. Busterud, & B. E. Willard. 1976. The seventh
annual report of the council on environmental quality. U.S. Govern.
Printing Off., Washington, D.C., USA.
Piehl, J. L. 1979. Avian mortality from a severe hail storm. Prairie Nat.
11:75-77.
Piest, L. A., & L. K. Scowls. 1985. Breeding duck use of a sewage marsh
in Arizona. J. Wildl. Manage. 49:580-585.
Polunin, N. 1960. Introduction to plant geography. McGraw-Hill
Book Company, New York, New York, USA.
Pospahala, R. S., D. R. Anderson, & C. J. Henny. 1974. Population
ecology of the mallard. II. Breeding habitat conditions, size of the
breeding populations, and production indices. U.S. Fish Wildl. Serv.
Resour. Publ. 115.
Ratcliffe, D. A. 1967. Decrease in eggshell weight in certain birds of
prey. Nature 215:208-210.
-----. 1970. Changes attributable to pesticides in egg breakage fre-
quency and eggshell thickness in some British birds. J. Applied Ecol.
7:67-115.
Raveling, D. G. 1977. Canada geese of the Churchill River basin in
north-central Manitoba. J. Wildl. Manage. 41:35-47.
-----. 1984. Geese and hunters of Alaska's Yukon Delta: manage-
ment problems and political dilemmas. Trans. North Amer. Wildl. &
Nat. Resour. Conf. 49:555-575.
-----. 1989. Nest-predation rates in relation to colony size of black
brant. J. Wildl. Manage. 53:87-90.
Raveling, D. G., & H. G. Lumsden. 1977. Nesting ecology of Canada
geese in the Hudson Bay lowlands of Ontario: evolution and popu-
lation regulation. Ontario Min. Nat. Resour. Fish Wildl. Res. Rep.
98.
Raveling, D. G., & D. S. Zezulak. 1988. Distribution, abundance, and
survival of cackling Canada geese, 1982-1987. Unpubl. Prog. Rep.,
U.S. Fish Wildl. Serv., Univ. California, Davis, California, USA.
Reed, A. 1975a. Reproductive output of black ducks in the St.
Lawrence estuary. J. Wildl. Manage. 39:243-255.
-----. 1975b. Migration, homing, and mortality of breeding female
eiders Somateria mollissima dresseri of the St. Lawrence estuary,
Quebec. Ornis Scand. 6:41-47.
Reed, A., & J. G. Cousineau. 1967. Epidemics involving the common
eider (Somateria mollissima) at Ile Blanche, Quebec. Nat. Canadian
94:327-334.
Reese, J. G. 1980. Demography of European mute swans in Chesa-
peake Bay. Auk 97:449-464.
Reeves, H. M., F. G. Cooch, & R. E. Munro. 1976. Monitoring arctic
habitat and goose production by satellite imagery. J. Wildl. Manage.
40:532-541.
Ringelman, J. K., & J. R. Longcore. 1982. Survival of juvenile black
ducks during brood rearing. J. Wildl. Manage. 46:622-628.
Ringelman, J. K., & J. R. Longcore. 1983. Survival of female black
ducks Anas rubripes, during the breeding season. Canadian Field-
Nat. 97:62-65.
Rockwell, R. E, C. S. Findlay, & F. Cooke. 1987. Is there an optimal
clutch size in snow geese? Amer. Nat. 130:839-863.
Ryder, J. P. 1967. The breeding biology of Ross' goose in the Perry
River region, Northwest Territories. Canadian Wildl. Serv. Rep. Se-
ries 3.
-----. 1971. Distribution and breeding biology of the lesser snow
goose in central Arctic Canada. Wildfowl 22:18-28.
-----. 1972. Biology of nesting Ross' geese. Ardea 60:185-215.
Sanderson, G. C., & E. C. Bellrose. 1986. A review of the problem of
lead poisoning in waterfowl. Illinois Nat. Hist. Surv. Spec. Publ. No.
4.
Sargeant, A. B. 1978. Red fox prey demands and implications to prai-
rie duck production. J. Wildl. Manage. 42:520-527.
-----. 1981. Road casualties of prairie nesting ducks. Wildl. Soc.
Bull. 9:65-69.
Sargeant, A. B., & P. M. Arnold. 1984. Predator management for
ducks on waterfowl production areas in the northern plains. Proc.
Vertebrate Pest Conf. 11:161-167.
Sargeant, A. B., & L. E. Eberhardt. 1975. Death feigning by ducks in
response to predation by red foxes (Vulpes fulva). Amer. Midl. Nat.
94:108-119.
Sargeant, A. B., G. A. Swanson, & H. A. Doty. 1973. Selective preda-
tion by mink, Mustela vison, on waterfowl. Amer. Midl. Nat.
89:208-214.
Sargeant, A. B., S. H. Allen, & R. T. Eberhardt. 1984. Red fox preda-
tion on breeding ducks in midcontinent North America. Wildl.
Monogr. 89.
Schamel, D. 1977. Breeding of the common eider (Somateria mollis-
sima) on the Beaufort Sea coast in Alaska. Condor 79:478-485.
Schmutz, J. K., S. M. Schmutz, & D. A. Boag. 1980. Coexistence of
three species of hawks (Buteo spp.) in the prairie-parkland ecotone.
Canadian J. Zool. 58:1075-1089.
Schmutz, J. K., R. J. Robertson, & F. Cooke. 1983. Colonial nesting of
the Hudson Bay eider duck. Canadian J. Zool. 61:2424-2433.
Schranck, B. W. 1972. Waterfowl nest cover and some predation rela-
tionships. J. Wildl. Manage. 36:182-186.
Scott, P. 1972. The swans. Houghton Mifflin Co., Boston, Massachu-
setts, USA.
Sheehan, P. J., A. Baril, P. Mineau, D. K. Smith, A. Harfenist, & W. K.
Marshall. 1987. The impact of pesticides on the ecology of prairie
nesting ducks. Canadian Wildl. Serv. Headquarters Tech. Rep. Series
No. 19.
Sherbin, I. G. 1979. Mercury in the Canadian environment. Economic
and Technical Review Report EPS 3-EC79-6. Environ. Protect. Serv.,
Ottawa, Canada.
Sherwood, G. A. 1968. Factors limiting production and expansion of
local populations of Canada geese. Pages 73-85 in R. L. Hine and C.
Schoenfold, eds. Canada goose management: current continental
problems and programs. Dembar Educ. Res. Serv., Madison, Wis-
consin, USA.
Siegfried, W. R. 1972. Ruddy ducks colliding with wires. Wilson Bull.
84:486-487.
Smith, A. G. 1971. Ecological factors affecting waterfowl production
in the Alberta parklands. U.S. Fish Wildl. Serv. Resour. Publ. 98.
Smith, A. G., & H. R. Webster. 1955. Effects of hail storms on water-
fowl populations in Alberta, Canada -- 1953. J. Wildl. Manage.
19:368-374.
Smith, A. G., J. H. Stoudt, & J. B. Gollop. 1964. Prairie potholes and
marshes. Pages 39-50 in J. P. Linduska, ed. Waterfowl tomorrow.
U.S. Govern. Printing Off., Washington, D.C., USA.
Sowls, L. K. 1955. Prairie ducks: a study of their behavior, ecology
and management. Stackpole Co., Harrisburg, Pennsylvania, USA.
Spencer, D. L., U. C. Nelson, & W. A. Elkins. 1951. America's greatest
goose-brant nesting area. Trans. North Amer. Wildl. Conf. 16:290-
295.
Springer, P. F., G. V. Byrd, & D. W. Woolington. 1978. Reestablishing
Aleutian Canada geese. Pages 331-338 in S. A. Temple, ed. Endan-
gered birds: management techniques for preserving threatened spe-
cies. Univ. Wisconsin Press, Madison, Wisconsin, USA.
Stehn, R. 1986. Nesting success of geese in the coastal tundra region of
the Yukon-Kuskokwim Delta, 1985. Unpubl. U.S. Fish Wildl. Serv.
Rep., Anchorage, Alaska, USA.
Stendell, R. C., H. M. Ohlendorf, E. E. Klaas, & J. B. Elder. 1976.
Mercury in eggs of aquatic birds, Lake St. Clair -- 1973. Pest. Mon-
itor J. 10:7-9.
Stoudt, J. H. 1971. Ecological factors affecting waterfowl production
in the Saskatchewan parklands. U.S. Fish Wildl. Serv. Resour. Publ.
99.
-----. 1982. Habitat use and productivity of canvasbacks in south-
western Manitoba, 1961-72. U.S. Fish Wildl. Serv. Spec. Sci. Rep. --
Wildlife 248.
Stout, I. J. 1967. The nature and pattern of nonhunting mortality in
fledged North American waterfowl. Thesis. Virginia Polytech. Inst.,
Blacksburg, Virginia, USA.
Stout, I. J., & G. W. Cornwell. 1976. Nonhunting mortality of fledged
North American waterfowl. J. Wildl. Manage. 40:681-693.
Street, M. 1977. The food of mallard ducklings in a wet gravel quarry,
and its relation to duckling survival. Wildfowl 28:113-125.
Sugden, L. C. 1978. Canvasback habitat use and production in
Saskatchewan parklands. Canadian Wildl. Serv. Occasional Paper
34.
Sugden, L. G., & G. W. Beyersbergen. 1984. Farming intensity on wa-
terfowl breeding grounds in Saskatchewan parklands. Wildl. Soc.
Bull. 12:22-26.
Swanson, G. A. 1977. Diel food selection by anatinae on a waste-sta-
bilization system. J. Wildl. Manage. 41:226-231.
Syroechkovskiy, E. V. 1972. Some peculiarities of interrelationships
between the snow-geese and the arctic foxes on the Wrangel Island.
Zoologicheskii Zhurnal 51:1208-1213.
Szaro, R. C., R. H. Albers, & N. C. Coon. 1978. Petroleum: effects on
mallard egg hatchability. J. Wildl. Manage. 42:404-406.
Szaro, R. C., G. Hensler, & G. H. Heinz. 1981. Effects of chronic in-
gestion of No. 2 fuel oil on mallard ducklings. J. Toxicol. & Envir.
Health 7:789-799.
Talent, L. G., R. L. Jarvis, & G. L. Krapu. 1983. Survival of mallard
broods in south-central North Dakota. Condor 85:74-78.
Townsend, G. H. 1966. A study of waterfowl nesting on the Saskatch-
ewan river delta. Canadian Field-Nat. 80:74-88.
Trainer, C. E. 1959. The 1959 western Canada goose (Branta canaden-
sis occidentalis) study on the Copper River Delta, Alaska. Pages 1-11
in H. A. Hansen, ed. Annual Waterfowl Report Alaska, 1959. Un-
publ. U.S. Fish Wildl. Serv. Ann. Waterfowl Rep., Washington, D.C.,
USA.
Trauger, D. L., & J. C. Bartonek. 1977. Leech parasitism of waterfowl
in North America. Wildfowl 28:143-152.
Trauger, D. L., & J. H. Stoudt. 1978. Trends in waterfowl populations
and habitats on study areas in Canadian parklands. Trans. North
Amer. Wildl. & Nat. Resour. Conf. 43:187-205.
U.S. Fish & Wildlife Service & Canadian Wildlife Service. 1987. Status
of waterfowl and fall flight forecast. Untitled Report. July 25. U.S.
Fish Wildl. Serv., District Columbia, USA, & Canadian Wildl. Serv.,
Ottawa, Canada.
Untergasser, G., & J. S. Hayward. 1972. Development of thermoreg-
ulation in ducklings. Canadian J. Zool. 50:1243-1250.
Vermeer, K. 1968. Ecological aspects of ducks nesting in high densities
among larids. Wilson Bull. 80:70-83.
-----. 1970a. Breeding biology of California and ring-billed gulls: a
study of ecological adaptation to the inland habitat. Canadian Wildl.
Serv. Rep. Series 12.
-----. 1970b. Some aspects of the nesting of ducks on islands in
Lake Newell, Alberta. J. Wildl. Manage. 34:126-129.
Vermeer, K., & F. A. J. Armstrong. 1972. Mercury in Canadian prairie
ducks. J. Wildl. Manage. 36:179-182.
Vermeer, K., F. A. J. Armstrong, & D. R. M. Hatch. 1973. Mercury in
aquatic birds at Clay Lake, western Ontario. J. Wildl. Manage.
37:58-61.
Weller, M. W. 1956. A simple field candler for waterfowl eggs. J. Wildl.
Manage. 20:111-113.
-----. 1964. The reproductive cycle. Pages 35-79 in J. Delacour, ed.
The waterfowl of the world. Volume 4. Country Life Limited, Lon-
don, England.
-----. 1980. The island waterfowl. Iowa State Univ. Press, Ames,
Iowa, USA.
Westerskov, K. 1950. Methods for determining the age of game bird
eggs. J. Wildl. Manage. 14:56-67.
White, D. H., & E. Cromartie. 1977. Residues of environmental pol-
lutants and shell thinning in merganser eggs. Wilson Bull. 89:532-
542.
White, D. H., & L. F. Stickel. 1975. Impacts of chemicals on water-
fowl reproduction and survival. Intern. Waterfowl Symp. 1:132-142.
Williams, C. S., & W. H. Marshall. 1938. Duck nesting studies, Bear
River Migratory Bird Refuge, Utah, 1937. J. Wildl. Manage. 2:29-
48.
Williams, M. J. 1974. Creching behaviour of the shelduck Tadorna
tadorna L. Ornis Scand. 5:131-143.
Wittenberger, J. F., & G. L. Hunt, Jr. 1985. The adaptive significance
of coloniality in birds. Pages 1-78 in D. S. Farrier, J. R. King, & K. C.
Parkes, eds. Avian biology. Volume 8. Acad. Press, Incorp., Orlando,
Florida, USA.
Wobeser, G. A. 1981. Diseases of wild waterfowl. Plenum Press, New
York, New York, USA.
Wobeser, G. [A.], A. Gajadhar, G. W. Beyersbergen, & L. G, Sugden.
1981. Myiasis by Wohlfahrtia opaca (Cog.): a cause of mortality of
newly hatched wild ducklings. Canadian Field-Nat. 95:471-473.
Wolf, K. 1955. Some effects of fluctuating and falling water levels on
waterfowl production. J. Wildl. Manage. 19:13-23.
Wright, B. S. 1954. High tide and an cast wind. Stackpole Co., Har-
risburg, Pennsylvania, USA.
Zicus, M. C. 1981. Canada goose brood behavior and survival esti-
mates at Crex Meadows, Wisconsin. Wilson Bull. 93:207-217.