The outstanding apple crop this year bodes well for the fecundity of the white-tailed deer, mouse, black bear, raccoon, wild turkey and porcupine populations this coming year. There are other more subtle ramifications of this year’s bountiful soft mast production, however, one of which is an increase in porcupine salt-seeking behavior.
Porcupines are avid consumers of apples. Typically, the supply of apples is depleted by the end of August, when porcupines move on to beechnuts and acorns. However, this year the apple crop was so plentiful that many apple trees still bear fruit and will provide sustenance for wildlife well into the winter. High in carbohydrates, apples help porcupines gain the extra weight necessary to help them survive through the winter months.
That said, apples have a relatively low pH and are acidic, some varieties more than others. Porcupines prefer the less acidic apples, but even these contain several hundred times more organic acid than other food, such as poplar or basswood leaves, that porcupines consume in the summer. High acid intake impairs sodium resorption in mammalian kidneys, causing porcupines to lose sodium in their urine. Consequently, as a result of a high proportion of apples in their diet, porcupines seek extra sodium. While they find salt in aquatic plants, insects, animal bones and outer bark, porcupines are also drawn to plywood, car tires, outhouses, sweat-soaked tool handles and other human-related sources of sodium. This would be a good year to make sure your hammers, hoes, rakes and shovels are well out of the reach of quill pigs. (Insert shows porcupine incisor grooves in flesh of apple. Porcupines often leave cores, avoiding eating the cyanide-rich apple seeds.)
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