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Haywood, Carl N. (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume 75 (1987)

Thiel, Richard P.
The status of Canada lynx in Wisconsin, 1865-1980,   pp. 90-96 PDF (2.7 MB)

Page 91

 867 876 
1865 l~!T~~ 
  Canada Lynx in Wisconsin  91 
of lynx in Wisconsin) filled out by bobcat hunters and trappers licensed
by the DNR were also reviewed. 
 While sight and track reports of lynx by citizens are of questionable value,
specimens offer bonafide proof of the occurrence of a species. Caution is
warranted when utilizing museum specimens in attempting to determine species
status because of sporadic or incomplete specimen sampling and because museum
collections tend to underemphasize areas where a species commonly occurs.
The assumption used to examine the available lynx data is that, in the absence
of other explanations, lynx specimens associated with periodic Canadian irruptions
indicate the presence of an established population, and conversely, specimen
occurrences corresponding with periodic in- 
ruptions suggest the absence of a viable Wisconsin lynx population. 
 UGLS Lynx Collections vs. Canadian irruptions. Figure 1 compares the occurrence
of UGLS lynx specimens with peaks in lynx irruptions reported from Canada
(Elton and Nicholson 1942; Keith 1963; Gunderson 1978; Mech 1980). In this
study eighty lynx specimens—S from Michigan, 16 from Wisconsin,
59 from Minnesota, were located in museums. An additional 12 Wisconsin (Table
1) and 3 Michigan non-museum lynx carcass records were included in the analysis.
Deposition of lynx specimens into museums has been sporadic; only 28 of the
95 known specimens were deposited in the 85 years prior to 1950. 
 1897 905 1914 
 iii I I'' ~l ' ~ I' 
 1875 1880 885 1890 1895 1900 1905 1910 1915 1920 
Fig. 1. Relationship between Canadian irruptions (arrows and dates), and
the number of Upper Great Lakes states lynx specimens in museums and DNR
carcass records. 

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