Biology Reference
In-Depth Information
8
8
1989
1990
Fig. 13.11
Split
sex ratios in the
wood ant
F.
truncorum
. The
distribution of sex
allocation
(proportional
investment in
female
reproductives) is
shown for
colonies where
the queen had
either singly (dark
blue) or multiply
(light blue) mated.
Across data from
four years,
colonies with
singly mated
queens tended to
produce females
and colonies with
multiply mated
queens tended to
produce males.
From Sundstrom
(1994). Reprinted
with permission
from the Nature
Publishing Group.
Photograph of a
queen prior to her
mating flight.
Photo © Lotta
Sundström.
6
6
4
4
2
2
0
0
0-0.2
0.2-0.4
0.4-0.6
0.6-0.8
0.8-1.0
0-0.2
0.2-0.4
0.4-0.6
0.6-0.8
0.8-1.0
8
8
1991
1992
6
6
4
4
2
2
0
0
0-0.2
0.2-0.4
0.4-0.6
0.6-0.8
0.8-1.0
0-0.2
0.2-0.4
0.4-0.6
0.6-0.8
0.8-1.0
Proportional investment in queens
Queen multiply mated
Queen singly mated
