Development of eggs,larvae and juveniles of the labrid fish,Halichoeres poecilopterus,reared in the laboratory |
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Authors: | Seishi Kimura Takanari Kiriyama |
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Institution: | 1. Fisheries Research Laboratory, Mie University, Wagu, Shima, P. O. Box 11, 517-07, Mie, Japan 2. Iki Branch Office, Nagasaki Prefecture, 570 Honmura, Gonoura, Iki, 811-51, Nagasaki, Japan
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Abstract: | Embryonic, larval and juvenile development of the labrid fish,Halichoeres poecilopterus, is described using a laboratory-reared series. The eggs, measuring 0.60–0.72 mm in diameter, were pelagic and spherical with a single oil globule (0.12–0.16 mm in diameter). Hatching occurred 18 h 48 min after spawning. The newly-hatched larvae, measuring 1.46–1.70 mm TL, had 8–114 + 16–18 myomeres. A conspicuous melanophore appeared on the dorsal finfold 8 h after hatching, at ca. 2 mm TL. The yolk was completely absorbed 3 days after hatching, at 2.52–2.72 mm TL. Flexion of the notochord started at ca. 6 mm TL and was finished at ca. 8 mm TL. Aggregate numbers of all fin rays were completed at ca. 14 mm TL. Squamation was almost completed at ca. 20 mm TL. |
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