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Salmonudae
SalveZmu5 pluvzu5 (H5lgcne…
1 1
,
Char
IWANA
,
…
…\
,
_
_
—.——……………,_.…
_
.
If
N.olf.
0
bulb.olf.
_
bu
sac.dor.
p
fis.end.
_
u .y —
.
fis.end.
îh opt.
lob.olf.
ch.op’£tect.
tect.
lob.lnf.
‘nfund
lob.inf.
:
l
-
_
N 3
corp.mam
N-3_
—
emin.gran
_
C'Cth
‘crist.cbl.
ven .q
__
_
N.5.,
med ob
crist.cbl
@
,
_
N-8'
med.sp.
_
'
_
'
N.9_+10.
'
—Œ
,
,
’
;'
,
_5mm
lateral
ventral
dorsal
'
'
_,
Descriptive notes :
“âËà”äëlàïëîätîbô.
Adults attain about 30 cm in body length.
F,äïäîlàttîÿtäëäbx
_
'
.
_
Slender body compressed.
Eyes comparatively small.
?ËËlËËE'ËÎlCJ: ( %ËLÎL\%J.
,
__
,
Mouth large.
Teeth present on anterior part of vomer,
IJ\Hä(àkkêîE’—JŸÇË<,
but absent on posterior part.
%Ëätlätäë - lâUfäëläälä'äl:à < %5ËLÎL\Z>.
Small cycloid scales.
Lateral line runs longitudinally along
the center of the body.
-
Dorsal surface yellowish-brown; ventral surface, white.
_
Small light yellow blotches are scattered over the dorsal
,
_
surface mixed with vermilion spots below the lateral line.
l
'
Live in cold water areas much further upstream than do
_.
Onchorhynchus masou var. masou.
Eat small fishes, insects and other aquatic animals located
'
,
,—
mainly by means of sight and auditory sense.
'
,
-
_,
Landlocked form found in mountain streams in Hokkaido,
-
Japan’s main island
and Shikoku.
-
_
f,
'
This species is a game fish.
.
Bulbus olfactorius clos_ely attached to lobus olfactorius.
'
,
,
Bulbus olfactorius comparatively large.
Lobus olfactorius
_
.
has a single dorsal protuberance caused by deep fissures.
,
Optic lobe very well-developed.
Corpus cerebelli relatively
_
large extending over medulla oblongata.
Eminentia
,
,
granularis and acoustico—lateral lobe very well-developed.
,