|
KMID : 0894520080120030207
|
|
Development & Reproduction
2008 Volume.12 No. 3 p.207 ~ p.213
|
|
|
Egg Development and Morphology of Larva and Juvenile of the Chub Mackerel, Scomber japonicus
|
|
Park Chung-Kug
Yeon In-Ho
Choi Nak-Hyun
Heo Seung-Joon
Han Kyeong-Ho
Lee Won-Kyo
|
|
|
Abstract
|
|
|
|
In order to monitor the developmental features of embryos, larvae, and juveniles of chub mackerel, Scomber japonicus, the fertilized eggs were obtained by artificial insemination. The fertilized eggs were spherical in shape and floated separately. Their membrane and yolk having 1 oil globule were transparent. The transparent eggs, having one oil drop in the yolk, were 0.94～1.02 ㎜ (mean, 0.95±0.03 ㎜) in diameter. The fertilized eggs started hatching at 51 hrs after fertilization in 20±0.5℃ water. The total length of the hatched larvae was 2.52～3.0 ㎜ (mean, 2.75±0.04 ㎜). At hatching, the larva, with the mouth and anus not opened yet, had yolk sack, 28～31 myomeres and eyes with melanophore. Yolk completely 2 days after hatching and the total length of post-larvae 3.12～3.63 ㎜ (mean, 3.39±0.05 ㎜). At the 18 days after hatching, the tip of tail became curved at the end and the stems for pectoral, dorsal, and caudal fins appeared. Juveniles, having all firm rays, was 44.12～58.72 ㎜ (mean 55.95±6.74 ㎜) in TL 25 days after hatching.
|
|
|
KEYWORD
|
|
|
Scomber japonicus, Egg, Larva, Juvenile, Melanophore, Hatched
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|