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SelectedWorks

1990

Ecological and Quantitative Genetics

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Food Quality, Heterozygosity, And Fitness Correlates In Peromyscus Polionotus, James M. Novak, William R. Teska, Michael H.. Smith Jan 1990

Food Quality, Heterozygosity, And Fitness Correlates In Peromyscus Polionotus, James M. Novak, William R. Teska, Michael H.. Smith

James M. Novak

Oldfield mice (Peromyscus polionotus) that are more heterozygous utilize food and maintain body weight under varying degrees of dietary stress better than their less heterozygous counterparts. Mice were collected in southern Florida and fed diets of three qualities. During each dietary treatment, body weight, amount of food eaten, amount of food absorbed, and feeding efficiency were determined. Body weights for all mice decreased during the experiment. More heterozygous mice maintained their weight better during periods of dietary stress than those that were less heterozygous. Mice with different levels of genetic variability had essentially the same mean feeding efficiency with high ...