Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Early Osteological Development of the Larvae and Juveniles in Sebastes oblongus (Pisces: Scorpaenidae)

황점볼락(Sebastes oblongus) 자치어의 골격발달

  • 변순규 (국립수산과학원 남동해수산연구소) ;
  • 강충배 (부경대학교 해양과학공동연구소) ;
  • 명정구 (한국해양연구원) ;
  • 차반석 (시공테크) ;
  • 한경호 (전남대학교 해양생산학부) ;
  • 정춘구 (국립수산과학원 남동해수산연구소)
  • Received : 2012.04.15
  • Accepted : 2012.06.12
  • Published : 2012.06.30
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Abstract

Skeletal development in the oblong rockfish, Sebastes oblongus, was studied based on extensive larval rearing conditions from December 2007 to March 2008. Newly-hatched larvae lacked osteological elements. After 3 days of bearing, jaw bones were ossified almost simultaneously with the frontal, parietal, clavicle, opercle, preopercle and branchiostegal rays at 8.0 mm average total length (TL). Ossification of the opercular was completed by 12.3 mm and the full complement of ossified elements of cranium and pectoral girdle were completed by 16.2 mm. Ossification of the cartilaginous caudal complex began to at 9.8 mm, and completely ossified by 18.0 mm. The fusing of the first and second, and the third and fourth hypurals initially occurred by 10.8 mm, and their fusion was finally completed at 18.0 mm. Notochord flexion occurred and formed an individual centrum by 8.5 mm and 10.8 mm, respectively, and all 26 centra were ossified by 13.2 mm. The preorbital bone began to ossify on the anterior region of eye at 10.8 mm, and the $1^{st}$ suborbital bone appeared ossified on the lower of eye by 12.3 mm, and all elements were ossified at 27.5 mm. Finally, after 71 days of bearing, the juveniles became 27.5 mm, and ossification was completed at this stage.

사육 중인 친어로부터 자연 산출된 자어를 2007년 12월부터 2008년 5월까지 수조에서 사육하면서 자치어의 성장에 따른 골격발달과정을 관찰하였다. 산출직후의 자어는 어떠한 골격요소도 전혀 골화되지 않았다. 부화 후 3일째의 평균전장 8.0mm에 처음으로 턱뼈의 골화와 함께 액골, 노정골, 쇄골, 새개골, 새조골 등의 골화가 시작되었다. 새개부를 구성하는 골격들은 12.3mm에 골화가 모두 완료되었으며, 두개골과 견대골을 구성하는 골격들은 평균전장 16.2 mm에 골화가 완료되었다. 미골복합체는 평균전장 9.8 mm에 하미축골의 골화가 시작되었고 이후 평균전장 10.8mm에 1번째와 2번째 하미축골 및 3번째와 4번째 하미축골이 서로 융합이 일어났으며, 평균전장 18.0 mm에 마지막으로 상미축골이 골화되어 모든 골격이 완료되었다. 척색의 굴절은 평균전장 8.5mm에 형성되어 평균전장 10.8mm에 완료되었으며, 26개로 구성된 척추골의 골화는 13.2mm에 완료되었다. 안와골의 골화는 안전골은 평균전장 10.8 mm에서 안하골은 평균전장 12.3 mm에서 골화가 시작되었으며, 평균전장 27.5 mm에 완료되었다. 최종적으로 부화 후 71일, 평균전장 27.5mm에 모든 골격의 골화가 완료되었다.

Keywords

References

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