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AFTON, A. D., R. H. HIER, and S. L. PAULUS. 1991. Lesser scaup diets during 
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ASSEL, R. A., R. H. QUINN, G. A. LESHKEVICH, and S. J. BOLSENGA. 1983. Great 
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BUSCH, D., and B. SCHUCHARDT. 1991. The use of the freshwater mussel Dreissena 
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CARNEY, S. M. 1964. Preliminary keys to waterfowl age and sex identification by 
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DE KOCK, W. C., and C. T. BOWMER. 1993. Bioaccumulation, biological effects, 
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DE LEEUW, J. J., and M. R. VAN EERDEN. 1992. Size selection in diving Tufted 
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DE VAATE, A. B. 1991. Distribution and aspects of population dynamics of the 
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DRAULANS, D. 1982. Foraging and size selection of mussels by the tufted duck,
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DRIVER, E. A., L. G. SUGDEN, and R. J. KOVACH. 1974. Calorific, chemical and 
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GAMMONLEY, J. H., and M. E. HEITMEYER. 1990. Behavior, body condition, and 
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HAMILTON, D. J. 1992a. The relationship between two predator groups, diving 
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_____, C. D. ANKNEY, and R. C. BAILEY. 1994. Predation of zebra mussels 
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HARMON, B. G. 1962. Mollusks as food of lesser scaup along the Louisiana Coast. 
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HOKE, R. A., J. P. GIESY, G. T. ANKLEY, J. L. NEWSTED, and J. R. ADAMS. 1990. 
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HOLLAND, R. E. 1993. Changes in planktonic diatoms and water transparency in 
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HOPPE, R. T., L. M. SMITH, and D. B. WESTER. 1986. Foods of wintering diving 
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JONES, J. J., and R. D. DROBNEY. 1986. Winter feeding ecology of scaup and 
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JORDE, D. G., G. M. HARAMIS, C. M. BUNCK, and G. W. PENDLETON. 1995. Effects of
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KOENIG, R. L. 1969. A comparison of the winter food habits of three species of 
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KORSCHGEN, C. E., L. S. GEORGE, and W. L. GREEN. 1988. Feeding ecology of 
     canvasbacks staging on Pool 7 of the upper Mississippi River. Pp. 237-249, 
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KOVALAK, W. P., G. D. LONGTON, and R. D. SMITHEE. 1993. Infestation of power 
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LEACH, J. H. 1993. Impacts of the zebra mussel (Dreissena polymorpha) on 
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MERSCH, J., A. JEANJEAN, H. SPOR, and J.-C. PIHAN. 1992. The freshwater mussel 
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MICHOT, T. C., and A. J. NAULT. 1993. Diet differences in redheads from 
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MITCHELL, C. M., and J. CARLSON. 1993. Lesser Scaup forage on zebra mussels at 
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OLNEY, P. J. S. 1963. The food and feeding habits of tufted duck Aythya 
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ORTH, R. J., and K. A. MOORE. 1981. Submerged aquatic vegetation of the 
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_____, and F. M. UHLER. 1982. Food habits of diving ducks in the Carolinas. 
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RYAN, R. A. 1972. Body weight and weight changes of wintering diving ducks. J. 
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STANCZYKOWSKA, A., and W. LAWACZ. 1976. Caloric value of the Dreissena 
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_____, P. ZYSKA, A. DOMBROWSKI, H. KOT, and E. ZYSKA. 1990. The distribution 
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SUTER, W., and M. R. VAN EERDEN. 1992. Simultaneous mass starvation of 
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SWANSON, G. A., and J. C. BARTONEK. 1970. Bias associated with food analysis in 
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_____, G. L. KRAPU, J. C. BARTONEK, J. R. SERIE, and D. H. JOHNSON. 1974. 
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THOMPSON, D. 1973. Feeding ecology of diving ducks on Keokuk Pool, Mississippi 
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WORMINGTON, A., and J. H. LEACH. 1992. Concentrations of migrant diving ducks 
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