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DISCUSSION
T
a
k
a
h
a
s
h
i and Yasuda(
1
9
6
0
) showed t
h
a
tt
h
ev
e
r
yea
r
1
y ba
r
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v
a
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t
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e
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t
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a
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t
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g
hEnomoto(
1
9
2
9
)p
o
i
n
t
e
do
u
tt
h
a
tt
h
i
sv
a
r
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t
ywass
e
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s
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t
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v
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e
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p
e
r
a
t
u
r
e
. A
c
c
o
r
d
i
n
gt
oT
a
k
a
h
a
s
h
i andYasuda,K
i
n
a
i5,a
sw
e
l
la
s
t
h
eo
t
h
e
rv
a
r
i
e
t
i
回 s
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c
c
e
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e
r
a
t
e
dh
e
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d
i
n
gt
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m
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t
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i
記 i
nt
e
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p
e
r
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t
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ew
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nac
e
r
t
a
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t
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a
t
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h
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eno d
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r
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p
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e
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s
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y among t
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e bar
関, i
n
c
1u
d
i
n
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n
a
i5undero
r
d
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a
r
ygrowthc
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n
d
i
t
i
o
n
. F
u
r
t
h
e
r
v
a
r
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more
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1
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ng t
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r
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h
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r
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land s
o
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e
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a
p
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n(
T
a
k
a
h
a
s
h
iandY
a
s
t
i
d
a
,1
9
5
8
)
. From
t
h
田 ef
i
n
d
i
n
g
s
,i
tmayn
a
t
u
r
a
l
l
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p
e
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e
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h
a
tt
h
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e
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仇 f
o
u
n
di
n
K
i
n
a
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o
rv
e
r
ye
a
r
1
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e
a
d
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n
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n
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e
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h
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a
l
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n
d
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t
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o
ni
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e
s
p
o
n
回 f
o
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h
en
o
n
s
i
b
l
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o
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h
ei
n
s
e
n
s
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t
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v
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t
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h
o
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t
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o
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d and a
l
S戸 c
i
f
i
cr
e
s
p
o
n
s
et
ot
e
m
p
e
r
a
t
u
r
e
.
I
tmaybeo
fi
n
t
e陀 5
tt
on
o
t
et
h
a
tt
h
eg
e
n
eea
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e
s
p
o
n
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i
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o
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e
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戸c
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a
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h
o
r
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h
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n
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t
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y
e
l
l
o
w
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n
gr
e
a
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h
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o
dandh
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g
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r
i
n
gt
h
e
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e
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p
e
r
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t
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r
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e
p
tlowd
u
r
i
n
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h
el
i
g
h
t戸 r
d
a
r
kp
e
r
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o
d
. R
o
b
e
r
t
s(
1
9
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8
)f
o
u
n
dt
h
a
tsuchas
p
e
c
i
a
lgrowthc
o
n
d
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t
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n
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s
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s
t
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r
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h
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r
o
d
u
c
t
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o
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n
d
/
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ra
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c
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m
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l
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t
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fc
h
l
o
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o
p
h
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l
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i
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l
a
n
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s
. I
tmaybe c
o
n
s
i
d
e
r
e
d
,t
h
e
r
e
f
o
r
e
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h
a
tt
h
egenee
仇
, i
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s
e
n
s
i
t
i
v
et
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h
es
開c
i
a
lgrowth c
o
n
d
i
t
i
o
n comparedw
i
t
ht
h
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t
h
e
re
a
r
l
i
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e
sgen
田.
Furthermore
,ap
o
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n
tworthyo
fm
e
n
t
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o
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e
dh
e
r
ei
st
h
a
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yMari
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ye
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r
l
ymutant fromBonus(
G
u
s
t
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f
s
s
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ne
ta
l
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9
6
0
),
r
回 p
o
n
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h
es
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a
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o
n
d
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t
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o
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nt
h
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sK
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n
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h
a
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h
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e
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a
a
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nMarimayb
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d
e
n
t
i
c
a
lw
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t
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ιinK
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n
a
i5
.
Namely
,F
a
v
r
e
tandF
r
e
c
h
a(
1
9
6
7
)c
a
r
r
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do
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ta
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e
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回 tf
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,Mari
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t
s
e
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)
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5xMaric
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h
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