Potential effects of highway mortality and habitat fragmentation on a population of painted turtles in Montana E9CBC35D-17E7-4C00-9213-03EFBB0C4692 Year: 2006 The highest numbers of both male and female mortalities occurred in June, subsequently mortalities for both sexes declined over the summer. Females exhibited less mortality in late summer than males (Figure 3). Adults were killed more often in early summer than late summer while juveniles experienced more consistent numbers of road kills throughout the summer (Figure 4). A spike of juvenile road mortalities occurred in late August. Ov
Potential effects of highway mortality and habitat fragmentation on a population of painted turtles in Montana E9CBC35D-17E7-4C00-9213-03EFBB0C4692 Year: 2006 The highest numbers of both male and female mortalities occurred in June, subsequently mortalities for both sexes declined over the summer. Females exhibited less mortality in late summer than males (Figure 3). Adults were killed more often in early summer than late summer while juveniles experienced more consistent numbers of road kills throughout the summer (Figure 4). A spike of juvenile road mortalities occurred in late August. Overall, more individuals were killed in the early summer months (up to mid-July) than late in the summer. The highest numbers of road mortalities occur where there are large ponds adjacent to both sides of the highway (Figure 5). Road locations 22 and 33 - 34 occur where the highway divides 2 kettle ponds. Road locations 49-52 occur in the vicinity of the scenic turnout at Beaverhead Lane where a large permanent pond is located on the west side and 2 semi- permanent ponds are on the east side of the highway. 10 E —♦— Female Male 00 LO I?) May T- 00 LO CD CD ^ CD CM CD (J> CD CO ^ f^ :^ CD 1^ O CvJ r^ CO CM 1^ 00 00 1^ ^ -I- r^ 3^ ^ £2 as 00 00 00 (J> 1- 00 CU CvJ June July Aug Time Period Sept Oc O Figure 3. Average road mortality (2002-2005) on a km section of Highway 93 separated out by weekly time periods and sex. Zero values indicate no individuals were found during that survey period, except on 9/21 and 9/28 no surveys were conducted. 14
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