Cypri nidae Tribol0don hakonenszs Îzak0rzezwr5
_
20 .
UGUI
'
.-..-….……
.
,
‘
tr.olf.
'
'°”'
_
lob.olf.
,
fis.end.
"°jî£
sul.yp.
'
_
'
…
…——————e
°“‘°
—
infund
infund
.mam.
.
-
lob.inf
—
m'
——-————«o
,
N.3
C—Cl °
N.
|_
emm.gran.
___—(â
__
.
L‘:ïîï.
—@
crist.cbl.
.
___—©
-
med-ob
vent.q
-
_
leb.
:
…...s
med-SP
”___—°
f î
'
5mm
lateral
_
'
véntral
"
dorsal
Descriptive
notes: '
U’
-
'
Adults attain about 40 cm in body length.
:ÊL‘“äî$îfäëlià U 75\72i
_
_
Body 'sOmewhat elongated and slightly compressed.
?ËË®“FÏŒ (?ËË) là“l“l®%Ëëîîb
Mouth at the-end of
,
(ËËÊ) lîä< %iËLîk‘ë.
Dorsal fin right above ventral fin. Lateral lines curved.
'
’
Color of dorsal surface dark-”brown, ventral surface,
-
silver—white.
'
À
,
_
_
'
:
In the breeding season a red vertical line on the ventral
surface of
is observed.
_
Live in rivers, brackish waters and the coastal waters.
,
_
Only this species of Cybrinidae can
-
live in the seas.
‘
'
,,
_
_
-
Eÿes of those living in the Saas are large.
Taste organs -of—fish living in rivers ahd'brackish
waters
'
'
_
,
'
'
_
'
Generallÿswim in Upper and
"
_
'
,
_
:
Extent of migration"comparatively wide. -
.
"
—
_
'
Swimming quickesf’amoñg all Cyprinidae.
-.
'
_
_
_
,
Eat
zooplankton. aquatic …insects and other small
:
_
marine animals.
00casiohàllye‘at seaweeds located by‘
_
'
.
_
‘
means of gustatory sense.
Live
lakes, swamps, ri_Vers, brackish waters and the
‘
'
'
coastal waters of Hokkaido, Japan’sçmain island and Kyushu.
-
-‘
.
Due to ecological differences between fish living in riverS,
’
_
_
,
brackish waters, lakes and
and those living in the
_
_
E
sea, the shape of the_cerebrum differs,
i. e., bulbus >
'
,
and lobus olfacto‘rius of-fiSh living in thefresh '
'
and brackish waters are large, whereas lobus opticus
'
and corpus cerebelli_of_ those living in the seaaré large.
.
_
,
olfactoriusbf both species situated near lobus
'
Theirlobds faCi_alis well-developed.
_
'
.
'_
-
Î
.
:
,
..'
..
’
.
.' .
.'
.
.
l
l'i lll l
l
_
20 .
UGUI
'
.-..-….……
.
,
‘
tr.olf.
'
'°”'
_
lob.olf.
,
fis.end.
"°jî£
sul.yp.
'
_
'
…
…——————e
°“‘°
—
infund
infund
.mam.
.
-
lob.inf
—
m'
——-————«o
,
N.3
C—Cl °
N.
|_
emm.gran.
___—(â
__
.
L‘:ïîï.
—@
crist.cbl.
.
___—©
-
med-ob
vent.q
-
_
leb.
:
…...s
med-SP
”___—°
f î
'
5mm
lateral
_
'
véntral
"
dorsal
Descriptive
notes: '
U’
-
'
Adults attain about 40 cm in body length.
:ÊL‘“äî$îfäëlià U 75\72i
_
_
Body 'sOmewhat elongated and slightly compressed.
?ËË®“FÏŒ (?ËË) là“l“l®%Ëëîîb
Mouth at the-end of
,
(ËËÊ) lîä< %iËLîk‘ë.
Dorsal fin right above ventral fin. Lateral lines curved.
'
’
Color of dorsal surface dark-”brown, ventral surface,
-
silver—white.
'
À
,
_
_
'
:
In the breeding season a red vertical line on the ventral
surface of
is observed.
_
Live in rivers, brackish waters and the coastal waters.
,
_
Only this species of Cybrinidae can
-
live in the seas.
‘
'
,,
_
_
-
Eÿes of those living in the Saas are large.
Taste organs -of—fish living in rivers ahd'brackish
waters
'
'
_
,
'
'
_
'
Generallÿswim in Upper and
"
_
'
,
_
:
Extent of migration"comparatively wide. -
.
"
—
_
'
Swimming quickesf’amoñg all Cyprinidae.
-.
'
_
_
_
,
Eat
zooplankton. aquatic …insects and other small
:
_
marine animals.
00casiohàllye‘at seaweeds located by‘
_
'
.
_
‘
means of gustatory sense.
Live
lakes, swamps, ri_Vers, brackish waters and the
‘
'
'
coastal waters of Hokkaido, Japan’sçmain island and Kyushu.
-
-‘
.
Due to ecological differences between fish living in riverS,
’
_
_
,
brackish waters, lakes and
and those living in the
_
_
E
sea, the shape of the_cerebrum differs,
i. e., bulbus >
'
,
and lobus olfacto‘rius of-fiSh living in thefresh '
'
and brackish waters are large, whereas lobus opticus
'
and corpus cerebelli_of_ those living in the seaaré large.
.
_
,
olfactoriusbf both species situated near lobus
'
Theirlobds faCi_alis well-developed.
_
'
.
'_
-
Î
.
:
,
..'
..
’
.
.' .
.'
.
.
l
l'i lll l
l