This 1957 paper concerns itself mostly with the use of fishers against porcupines that damage logging areas. Fishers are the porcupine’s only major predators.

The range of the fisher originally "encompassed the whole of the northern forest, from coast to coast and extending down the mountains along their strips of coniferous timber. Subsequent destruction of great areas of forest coupled with the replacement of conifers by hardwoods over much of the remaining, plus the relentless trapping of the fisher for its pelt, drastically reduced both range and numbers. East of the Mississippi, the species recently became extinct in the Northern Penisula of Michigan and adjacent Wisconsin. It is now confined to the northern portions of Maine and New Hampshire and to the Adirondack mountains and adjacent areas in northern New York." P.719