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5mm
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Descripti‘v‘e notes:
c…
£»... …
e
.
=
-
ïëäî'
,/l\iÏti—"i
Adulte attarn about 20 cm rn body length.
7
.-.m
i.z
.
.
,.
.
,
.
Body slightly elongated
-
./._
L
©
'
‘
‘
'
‘
‘
‘
‘
'
\
'ÎÎE
'Α? "
l?“ l\
Bodv color yellowrsh-olrve ane srdes, srlver»whrte.
7.
Light—yellow spots above the middle of pectoral tin.
Caudal
tin rosy.
Hatched in rivers; descend the rivers to the sea and grow
into tingerlings.
ln spring ascend the rivers and
to
maturity.
Find food mostly by sight.
Eat seaweeds and small
marine animals.
Swim comparatively quickly in the daytime.
Each l'èE
its
own
territory.
At night sink to the bottoms of rivers and are inactive.
Extent of migration marrow.
Distribution extends from Japan to Formosa, Korea and
China.
Caught by artificial hait and decoys.
Bulbus oltactorius and lobus olfactorius closely attached,
each of them comparatively large.
Lobus opticus moderately developed.
Cerebellum medium
sized.
Eminentia granularis distinct and crista cerebelli
comparatively large.
/f<ä;…
"
,.
’
52
53
l
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—:…-—<î*;“‘ïî“*f‘\ie”“䓔îä
l
.
«
,
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3/ U
,…
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bulb.oll.
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iobulf
@
=
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emin,gran
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N9
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\
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°C…“
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acu.lai.m
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°g\£ïî\Ï-xî\—ï‘
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-
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d sp
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me.
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f.__
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5mm
ventral
U
…____……___……______
rs
+r.‘;‘ii
Descripti‘v‘e notes:
c…
£»... …
e
.
=
-
ïëäî'
,/l\iÏti—"i
Adulte attarn about 20 cm rn body length.
7
.-.m
i.z
.
.
,.
.
,
.
Body slightly elongated
-
./._
L
©
'
‘
‘
'
‘
‘
‘
‘
'
\
'ÎÎE
'Α? "
l?“ l\
Bodv color yellowrsh-olrve ane srdes, srlver»whrte.
7.
Light—yellow spots above the middle of pectoral tin.
Caudal
tin rosy.
Hatched in rivers; descend the rivers to the sea and grow
into tingerlings.
ln spring ascend the rivers and
to
maturity.
Find food mostly by sight.
Eat seaweeds and small
marine animals.
Swim comparatively quickly in the daytime.
Each l'èE
its
own
territory.
At night sink to the bottoms of rivers and are inactive.
Extent of migration marrow.
Distribution extends from Japan to Formosa, Korea and
China.
Caught by artificial hait and decoys.
Bulbus oltactorius and lobus olfactorius closely attached,
each of them comparatively large.
Lobus opticus moderately developed.
Cerebellum medium
sized.
Eminentia granularis distinct and crista cerebelli
comparatively large.
/f<ä;…
"
,.
’
52
53