Eléments minéraux du régime alimentaire du campagnol des champs, Microtus pennsylvanicus (Ord.)

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Abstract
One hundred and ninety-five meadow voles, Microtus pennsylvanicus (Ord.) were captured by means of 485 traps installed each month during the summer of 1974 in four types of culture. The analysis of minerals in their diet indicates low variation in potassium levels, whereas nitrogen, calcium, phosphorus, and magnesium levels appear to be much more environment-dependent. There are a few differences between the diets of males and females. Stomach contents of captured voles do not vary significantly from one type of culture to another, but the physiological reproductive condition of the animals accounts for significant differences in stomach contents.[Journal translation]