Harvest samples have been obtained from cooperating mink 

 trappers throughout the state. Catches are examined for age and sex 

 ratios and compared with other areas. Each year's data are evaluated 

 for trends in fluctuating age and sex proportions. 



Approximately 1600 mink carcasses, or 16 per cent of the estimated 

 1954-55 mink harvest, was examined for age and sex ratio data. The 

 reduced sample, approximately 1000 specimens, collected in 1955-56 

 reflects the reduced harvest due to early and prolonged winter con- 

 d-tions. 



Age and sex ratios from harvest samples combined with the findings 

 from population studies of wild mink will provide factual information 

 to guide the establishment of trapping seasons in accordance with the 

 status of mink populations. 



MARTEN 



Proper management of Montana's marten populations presents 

 an excellent opportunity for increased production of furs. It is felt 

 that the yield of marten pelts under careful management may be 

 several times that of past years. In addition, areas of suitable habitat 

 which now support very few or no marten provide opportun ties for 

 restoration through restocking. 



Analysis of results of earlier marten seasons guided formation of 

 improved management plans which will allow annual cropping of 

 marten populations. Former seasons were at irregular intervals. The 

 open season set in the fall of 1955 was the first of a sustained yield 

 program. 



The long-range investigation of marten living requirements under- 

 taken in cooperation with the Montana Cooperative Wildlife Research 

 Unit was continued during the biennium. This study is based on live 

 trapping and is producing an understanding of population fluctuations 

 through long-term observation of marked marten. 



Progress toward restocking of vacant habitats was made during 

 the summer of 1955 with release of live trapped marten in several areas 

 of northwestern Montana. It is expected that this activity will continue 

 in 1956. 



Marten are equally at home on the ground or in trees. In pursuit of squirrels, 

 they often leap from tree to tree as pictured above. 



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