37 8
CHARLES J . KREBS AND JUDITH H. MYERS
TABLE XXI
Comparison of the survival rates per 14 days for the transferrin genotypes of Microtus
ochrogaster males in six populations studied. A1 includes data collected during the
first population cycle on area A , and A 2 is from the second cycle on the same area.
Underlined values are the higher for that set of data.
Area
Population
change
Genotype
F
H
I
A1
A2
C
Increase
EE
0.74
0.81
-
0.84
0.85
0.85
EF
0.87
0.89
-
0.76
0.79
0.70
Decrease
EE
0.65
0.69
0.64
0.59
0.68
0.75
EF
0.78
0.81
0.84
0.75
0.68
0.75
-
-
-
-
-
-
~
~
-
TABLE XXII
Comparison of the relation between the frequency of the transferrin TfE allele and
density in Microtus pennsylvanicus in the studies of Tamarin and Krebs (1969)
and Gaines and Krebs (1 9 71).
Correlation coefficients
Tamarinl
Geines2
Males
0.06
-0*18*
F e m a 1 e s
- 0.67**
0.03
Relationship of TfE frequency and density (based on one population).
Relationship between change in TfE frequency and change in density (based on four
pOpUI8t~S).
* P<*05
** P<.Ol
TABLE XXIII
Compariaon of the survival rates per 14 days for the transferrin genotypes of Microtus
pennsylvanicus revealed in the studies of Tamarin and Krebs (1969) and Gaines
and Krebs (1971). Underlined zcaluea are the highest for that set of data.
Tamarin
Gaines
Genotype
Increasing
Decreasing
Increasing
Decreasing
Tfc/Tfc
0.82
0.76
0.84
0.66
Tfc/TfE
0.95
0.77
0.84
0.75
TfE/TfE
0.90
0.78
0.94
0.75
-
-
-
-
-