Biology Reference
In-Depth Information
A
G
B
C
H
D
I
E
F
Figure 1.
Developmental stages of the Japanese fl ounder,
Paralichthys olivaceus
.
A
: BL 3.25 mm. End of the notochord is straight. The gut has a loop.
B
: BL 5.40 mm. Anlages of elongated dorsal fi n rays are visible.
C
: BL 5.45 mm. There are 3 elongated dorsal fi n rays. Anlages of caudal fi n rays are visible at
the ventral side of the end of notochord.
D
: BL 5.50 mm. Eyes are still symmetrical. There are 5 elongated dorsal fi n rays and 6 caudal
fi n rays. Body compression begins.
E
: BL 8.30 mm. Right eye starts to move. The end of notochord is dorsally fl exed by 45
O
.
Anlages of ventral fi n rays are visible. There are 11 caudal fi n rays.
F
: BL 9.20 mm. Right eye further migrates but not visible from the left side. Notochord is fl exed
dorsally by 90
O
. Additional one small fi n ray appears at the anterior end of elongated dorsal
fi n rays. Anlages of ventral fi n rays appear. Dorsal and anal fi n rays are developing.
G
: BL 10.25 mm. Part of the right eye is visible from left side. There are 6 ventral fi n rays.
Dorsal, anal, and caudal fi n rays have developed.
H
: BL 12.10 mm. Right eye is on the dorsal midline. Melanophores increase in number on the
left side of body. Pectral fi n rays start to develop. Settling behavior is observed.
I
: BL 13.20 mm. Metamorphosis has completed. Dorsal elongated fin rays have been
resorbed completely. Right eye has completely relocated to the left side. All fi n rays have
developed.
A~H
larvae;
I
juvenile.
[From Minami, 1982 with permission].
