Handout 3B: Black Tiger Snake Population Simulation Cards

Handout 1: Differences within a single species

Two adult female Black tiger snakes (Notechis ater niger) were found on small islands off the South Australian coast.
The smaller snake was found on Roxby Island, a small island off the coast of the Eyre Peninsula and the larger found on East Franklin Island.
Scientists sampled both islands and recorded data of the length of adult tiger snakes, measured from snout to vent, length in millimetres. /
Length of adult tiger snakes
East Franklin Island / Length of adult tiger snakes
Roxby Island
Length of males
Snout to vent length (mm) / Length of females
Snout to vent length (mm) / Length of males
Snout to vent length (mm) / Length of females
Snout to vent length (mm)
1312 / 1340 / 1205 / 1230 / 810 / 890 / 702 / 780
1355 / 1305 / 1220 / 1278 / 855 / 712 / 795 / 760
1370 / 1395 / 1290 / 1158 / 789 / 754 / 792 / 768
1205 / 1209 / 1134 / 1120 / 725 / 760 / 785 / 778
1234 / 1256 / 1130 / 1191 / 705 / 780 / 752 / 745
1256 / 1270 / 1123 / 1180 / 745 / 715 / 786 / 734
1270 / 1278 / 1167 / 1166 / 755 / 719 / 732 / 708
1238 / 1290 / 1145 / 1133 / 735 / 605 / 765 / 670
1290 / 1208 / 1178 / 1145 / 675 / 555 / 689 / 620
1245 / 1260 / 1102 / 1115 / 670 / 655
1256 / 1240 / 1122 / 1102 / 570 / 550
1250 / 1230 / 1169 / 1198
1245 / 1200 / 1170 / 1176
1267 / 1208 / 1148 / 1133
1280 / 1220 / 1156 / 1121
1230 / 1233 / 1189 / 1180
1250 / 1240 / 1170 / 1175
1200 / 1270 / 1160 / 1128
1215 / 1290 / 1190 / 1110
1220 / 1268 / 1170 / 1179
1222 / 1245 / 1050 / 1055
1225 / 1235 / 1080 / 1066
1155 / 1190 / 1085 / 1099
1170 / 1106 / 970 / 1023
1145 / 1009 / 987 / 965
1023 / 1045
1080 / 1090
990 / 980
985 / 977
n = 58 / n = 50 / n = 18 / n = 22