Biology Reference
In-Depth Information
800
High Strain
Low Strain
600
400
200
0
0
1
2
3
4
Evaluation
Figure 5.6.
Area of pollen (cm
) for high- and low-strain colonies for the four
evaluations of generation 3. Means and 95 percent coni dence intervals are
presented for 29, 30, 30, and 30 low-strain colonies and 23, 27, 27, and 27
high-strain colonies for evaluations 1-4, respectively. Reprinted with kind
permission from Springer Science+Business Media:
Behavioral Ecology and
Sociobiology,
“h e ef ects of colony-level selection on the social organization of
honey bee (
Apis mellifera
L.) colonies: Colony-level components of pollen
hoarding,” 36(2), 1995, 134-144, Page RE, Fondrk MK, Fig. 2.
Additional support comes from cross-fostering experiments. High-
and low-strain bees were raised together in high- and low-strain hives
with high- and low-strain queens and brood. High-strain foragers col-
lected more pollen in the low-strain hive, and low-strain foragers
collected less pollen in the high-strain hive. h is result is the opposite
of what we expected on the basis of H3 and H4; therefore, those hypoth-
eses were rejected. Although high- and low-strain colonies dif ered in
the proportions of their foragers collecting loads of pollen, they did not
dif er in total number of foragers and in generation 33 had fewer, rather
than more, total bees because of the reduced amount of brood reared,
so we rejected H5 (Table 5.1).
