• Title/Summary/Keyword: Juvenile rockfish

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The Early Life History of the Rockfish, Sebastiscus marmoratus 2. Morphology and Skeletal Development of Larvae and Juvenile (쏨뱅이 Sebastiscus marmoratus 초기생활사에 관한 연구 2. 산출 자치어의 외부형태 및 골격 발달)

  • Kim, Yong-uk;Han, Kyeong-Ho;Kang, Chung-Bae;Kim, Jin-Koo;Byun, Sun-Kyu
    • Korean Journal of Ichthyology
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    • v.9 no.2
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    • pp.186-194
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    • 1997
  • Naturally beared larvae obtained from female fish kept in the aquarium were reared for 45 days in the laboratory. The naturally beared larvae were 3.19 mm in average total length (TL) with 9+15~16=24~25 myomeres. Melanophores were distributed on the dorsal margin of intestine tube, ventral margins of the tail and around the oil globule, but none on the top of head and on the pectoral fins. The larva (3.35 mm TL) consumed all yolk and oil globule in 5 days after bearing, and jaw bones and clavicle began to be ossified rapidly. In 22 days after bearing, the larvae averaged 6.30 mm TL and the caudal notochord flex $45^{\circ}C$. Fin development in S. marmoratus larvae proceeds in the following sequence : caudal, pectoral, dorsal, anal and ventral fin.

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Osteological Development of the Larvae and Juveniles of Sebasticus tertius (Barsukov et Chen) in Korea (한국산 붉은쏨뱅이 Sebasticus tertius (Barsukov et Chen) 자치어(仔稚漁)의 골격발달)

  • Han, Kyeong-Ho;Lim, Sang-Ku;Kim, Kwang-Su;Kim, Chul-Won;Yoo, Dong-Jae
    • Korean Journal of Ichthyology
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    • v.13 no.1
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    • pp.63-68
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    • 2001
  • The skeletal development of the larvae and juvenile of red marbled rockfish, Sebasticus tertius (Barsukov et Chen) was studied based on individuals that were discharged and reared in the laboratory from April to May 1997. In 8 days after bearing, the postlarvae attained 4.42 mm in total length (TL), and its parasphenoid, premaxillary, maxillary, and clavicle were ossified for the first time at this stage. In 15 days after bearing, the postlarvae attained 5.23 mm in TL, and its pterotic, basioccipital, exoccipital, opercle, and preopercle were ossified, with one spine on the each cranium and preopercle. In 27 days after bearing, the postlarvae attained 8.81 mm in TL, its vertebra were posteriorly ossified to the 15th centrum, and five spines were formed on the preopercle. In 39 days after bearing, the juveniles attained 14.21 mm in TL, and the all bones were almost completed at this stage.

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