. La Canadian field-naturaliste. 1999 Burnett : Chapitre 4 : Travailler avec les mammifères marins 65 parmi les populations de renards arctiques dans les districts de Keewatin et de Franklin.^^" Bien que la plupart de cette étude, qui fini par former le fondement de la thèse de doctorat de Macpherson, ont eu lieu dans l'Arctique, où il trouve et examiné plus de 200 repaires, il n'a transporter une paire de renards au sud un an, à partir de la Thelon Refuge à Ottawa, afin de poursuivre ses enquêtes au cours de l'hiver à l'aide d'animaux en captivité. L'expérience n'a pas été une réussite totale, mais il a révélé au moins une caractéristique remarquable de t

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. The Canadian field-naturalist. 1999 Burnett: Chapter 4: Working with Mammals 65 among Arctic Fox populations in the Keewatin and Franklin districts.^"^ Although most of this study, which eventually formed the foundation of Macpherson's doctoral thesis, took place in the Arctic, where he located and examined more than 200 dens, he did transport a pair of foxes south one year, from the Thelon Sanctuary to Ottawa, in order to pursue his investigations over the winter using captive animals. The experiment was not wholly successful, but it revealed at least one remarkable characteristic of the species — an unexpectedly strong homing instinct. Some time after their arrival in the city, the foxes escaped. Both had been tagged, so it was not entirely surprising when Macpherson received word that one of the pair had been trapped. What surprised him was the location where the little fugitive was taken. The trapper who returned the tag worked a trapline near James Bay, 750 kilometres or more to the north of the nation's capital."^ Some of the most extensive research into the biol- ogy and ecology of a commercially valuable fur- bearing mammal, however, was focused on the Muskrat, a species that for many years has accounted for approximately 50% of the total number of pelts taken by trappers in Canada."*^ In the south, Muskrat studies were often a corollary to projects involving waterfowl habitat and wetland conservation. In the north. Ward Stevens had begun doing Muskrat research in the Mackenzie Delta in 1947'*^ and earned a Ph.D. on the strength of it. Stevens' initial demonstration of the importance of fur trapping to the northern economy led to extensive additional studies. He was followed at the CWS outpost in Aklavik by Eoin H. McEwan, who in turn was suc- ceeded by Joe Bryant in 1955. Bryant's task combined ecological and population research with a somewhat broader mandate to advise local trappers and the territorial government on how to manage the an

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