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__ Maturation 500 o_ Maturation
_ 600 E
r-- I _ --- 300
400 -'=
447.1 507.5 504.7 Mean .=,,_200 339 7 425 6 405.7 Mean
• •
200 30 21 19 N _= 100 37 27 20 N
0
_t Pupation o_ Pupation
600 500
500 ]....._ I --- 400
40o I Ij F-__] , 3oo I 1 w
300 El, _ 200 '
._ 200 342.6 396.6 406.3 Mean 265.3 339.1 329.6 I_ean
100 29 21 19 N _= 100 32 27 20 II J
0 , , , 0 ' '
A B C A B C
Locationof Q. punctatella Locationof Q. punctatella
Figure lO.---Body size of three different regional Q. punctatella populations reared on beeches in the Tohoku Research
Center of the Forestry and Forest Products Research Institute in Morioka. Weight of larvae at maturation and at
pupation are indicated for each sex. Bar means maximum and minimum value, and upper and lower sides of box are
one standard error.
Tests of Two Hypotheses in Field Populations
Larvae from all of the regions were reared on beech saplings in each of the respective regions. Plant quality influenced
survivorship in each region. Although great differences in survivorship between regions were observed, little difference
was found within a region (Table 1). Approximately half of the larvae reared on beech saplings in Sites B and C
survived to maturity, whereas survivorship of all those reared on Site A beech was between 3.2% and 6.5%. The influence of
Q, p,nctawlla population quality in each region on body size was clearly evident. Irrespective of the location of beech
saplings on which the larvae were reared, the order of average body size among the regional populations was the same: B >__
C 2 A (Table 2). In particular, body size of A population larvae was significantly smaller than that of larvae from the other
Table !.--Survivorship of Q. punctatella larvae from each region on beech in that region.
78
Q. punctatella
A B C
A 3.6% 3.2% 6.5%
(6/165) (5/155) (10/154)
E crenata B 48.9% 55.0% 53.9%
(44/90) (33/60) (41/76)
C 55.8% 52.9%
(72/129) (36/68)
(No. of matured larvae / No. of hatched larvae)