한국어류학회지 (Korean Journal of Ichthyology)

  • 제19권4호
  • /
  • Pages.350-359
  • /
  • 2007
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
권호 표지

강도다리, Platichthys stellatus의 난발생과 자치어의 형태발달

Egg Development and Morphological Change of Larvae and Juveniles of the Starry Flounder, Platichthys stellatus

  • 변순규 (국립수산과학원 동해특성화연구센터) ;
  • 이배익 (국립수산과학원 동해특성화연구센터) ;
  • 이종하 (동해수산연구소) ;
  • 구학동 (국립수산과학원 종보존연구센터) ;
  • 박상언 (국립수산과학원 바다목장화사업단) ;
  • 윤성민 (경상북도수산자원개발연구소) ;
  • 황선영 (군산지방해양수산청) ;
  • 김이청 (국립수산과학원 동해특성화연구센터) ;
  • 한형균 (국립수산과학원 중부내수면연구소)
  • 투고 : 2007.09.24
  • 심사 : 2007.11.02
  • 발행 : 2007.12.31
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초록

강도다리, Platichthys stellatus의 난발생과정과 자치어의 형태발달에 관하여 관찰하였다. 수정란은 무색투명한 분리부성란이며, 유구는 없고, 난경은 1.09~1.19 mm (평균 $1.13{\pm}0.03mm$, n=50)였다. 사육 수온 $8.2{\sim}11.2^{\circ}C$에서 수정 후 121시간 만에 부화를 시작하였다. 부화 직 후의 자어는 전장 2.58~2.89 mm (평균 $2.67{\pm}0.09mm$)로 입과 항문은 열려 있지 않으며, 척색은 직선형이고, 근절은 14+27=41개이다. 척색과 소화관 위에는 흑갈색소포와 황갈색소포가 산재해 있고, 막지느러미 가장자리와 눈 및 난황 위에는 색소포가 없다. 부화 후 5일째에는 전장 4.30~4.97 mm (평균 $4.74{\pm}0.21mm$)로 입과 항문이 열려 있으며, 부화 후 10일째 자어는 전장 4.67~5.75 mm (평균 $5.30{\pm}0.31mm$)로 난황이 완전히 흡수되어 후기자어기로 이행하며, 로티퍼의 섭식이 활발해진다. 부화 후 23일째에는 전장 6.69~8.82 mm (평균 $7.85{\pm}0.75mm$)로 오른쪽 눈이 왼쪽으로 이동하기 시작한다. 부화 후 52일째 개체는 전장 10.99~17.06 mm (평균 $13.50{\pm}1.67mm$)로 눈은 머리부분의 왼쪽으로 완전히 이동하여 있으며, D. 64~67: A. 43~46: P. 11: V. 6: C. 19개로 각 지느러미 줄기가 정수에 달하여 치어기로 이행하였다.

The egg development and morphological change of larvae and juveniles of the starry flounder, Platichthys stellatus were observed in laboratory. Fertilized eggs of the species, 1.09~1.19 mm (mean $1.13{\pm}0.03mm$, n=50) in diameter, were floating, colorless, transparent in shape and lacked in oil globules. The eggs hatched out 121 hours after fertilization at water temperature $8.2{\sim}11.2^{\circ}C$. The size of the hatched larvae were 2.58~2.89 mm (mean $2.67{\pm}0.09mm$) in total length, their mouth and anus were not open yet and myotome number was 14+27=41. Melanophore and xanthophore appeared on the notochord and digestive organ and the margin of membrane fin, on the yolk sac and eyes were lacking in pigment cells. 5 days after hatching the larvae attained 4.30~4.97 mm (mean$4.74{\pm}0.21mm$) in TL, and their mouth and anus were open. 10 days after hatching the larvae transformed to postlarval stage and they were 4.67~5.75 mm in TL (mean $5.30{\pm}0.31mm$), and absorbing the yolk completely. Feeding activity increased as the mouth became larger. At 23 days, the larvae attained 6.69~8.82 mm in TL (mean $7.85{\pm}0.75mm$), and the right eye was started moving to the left side of the head. At 52 days, the juveniles attained 10.99~17.06 mm in TL (mean $13.50{\pm}1.67mm$). The right eye was moved completely onto the left side. All of the fins had completed set of the fin rays (D. 64~67: A. 45~51: P. 11: V. 6: C. 19).

키워드

과제정보

연구 과제 주관 기관 : 국립수산과학원

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