. The Canadian field-naturalist. Natural history. 2001 Clevenger, McIvor, McIvor, Chruszcz, and Gunson: Tiger Salamander Movements 201 Middle Lake. Chilver Lake Complex 500 500 Meters LEGEND A Salamander Road-kill O Cluster Center ^^~ Presumed Direction of Travel Figure 1. Location of Tiger Salamander road-kills along the Trans-Canada highway, Kananaskis Country, Alberta, Canada. volume = 21 450 vehicles/day; Parks Canada Highway Service Centre, Calgary, Alberta) coupled with the slow movements of ambystomatids would result in exceedingly few individuals surviving the highway traverse. We were
. The Canadian field-naturalist. Natural history. 2001 Clevenger, McIvor, McIvor, Chruszcz, and Gunson: Tiger Salamander Movements 201 Middle Lake. Chilver Lake Complex 500 500 Meters LEGEND A Salamander Road-kill O Cluster Center ^^~ Presumed Direction of Travel Figure 1. Location of Tiger Salamander road-kills along the Trans-Canada highway, Kananaskis Country, Alberta, Canada. volume = 21 450 vehicles/day; Parks Canada Highway Service Centre, Calgary, Alberta) coupled with the slow movements of ambystomatids would result in exceedingly few individuals surviving the highway traverse. We were unable to document how many or what proportion of salamanders approach- ing the highway actually crossed safely. We collected and measured the one specimen from 29 July 1998 and 7 of the 8 specimens collect- ed on 11 August 1999. One individual was dismem- bered such that accurate measurements could not be made. The mean snout-to-vent (SVL) length of the eight salamanders was cm (SD = ), ranging from cm to cm. The sex of the individuals could not be determined externally. Based on the SVL the collected specimens appeared to be newly- transformed adults but none were dissected to deter- mine either maturity or sex. We did not note any gill stubs that would have indicated transformation from larvae was just being completed as has been observed in some migrations elsewhere (F. R. Cook, personal communication). Direction of travel and mortality distribution In a similar report, Duellman (1954) found late- season eastern Tiger Salamanders moving randomly across a two-lane Michigan roadway; but he did not detect a definite migration in any one direction. The live Tiger Salamanders we observed approaching the highway were predominantly moving north- bound across the Trans-Canada highway. We base this on our observations of Tiger Salamander move- ment and the high number of road-killed salaman- ders on the south side of the highway as opposed to the north side. Dur
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