72 WE Ponder, D.J. Colgan, T. Terzis, S.A. Clark, A.C. Miller 
Т Т Т 5 Т Т 
ж 
ж 
1 % 
4 М 4 
с J ж 
o 
5 3 
Ze 
т zi 
ж 1 
2x 7 
4 ж 
1 0 1 1 — 1 1 
А1 А2 АЗ Са1 Ca9 Cb2 Осз Сол А2 АЗ A6 B2 
A Spring B Spring 
5 "m I T Tore 5 | mq mem ааа p 3) T T кте! Т Т 
% 
о 
4 Б e 324 le ж 
ж 
iE e Ж ж m 
Sgt 408 1 
- 3 3T 
Ф ж Ej 5 8 Ej 
x 
2 121 | 
ж 
1 =; Le жын Е len 
d 509 On Sal А? АЗ  Caipol Cc3 Go 
4 90 ^ О е2 а1р 
oe о oA" oA" 
C Location in spring D Spring 
Figure 16. 
Box plots showing variation in shell length in Dalhousia globosa and D. harrisi. A. Shell lengths of D. 
globosa. Note that the data for Cal are pooled from the samples shown separately in C. B. D. harrisi 
showing variation in shell size in the A and B spring groups. C. D. globosa, showing variation in shell size in 
different sites in Spring Cal. D. Comparison of shell lengths of Dalhousia globosa and D. harrisi (stippled) 
in some of the springs in which they аге sympatric. The median (the mid-point of the ordered numbers) is 
marked inside the box, the ends of the boxes splitting the ordered numbers in half again. Outliers are 
represented by an asterick and extreme outliers by a circle. 
