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리테르개멍게 (Halocynthia hilgendorfi ritteri)의 초기 발생
Early Development of the Ascidian (Halocynthia hilgendorfi ritteti)

최영진   (제주지방해양수산청CC0062249  ); 김삼연   (제주대학교 해양과환경연구소UU0001165  ); 이치훈   (제주대학교 해양과환경연구소UU0001165  ); 노섬   (제주대학교 해양과학부UU0001165  ); 이영돈   (제주대학교 해양과환경연구소UU0001165  );
  • 초록

    Early development and metamorphosis of the ascidian (Halocynthia hilgendorfi ritteri) were investigated from fertilized egg. The samples were collected in the coastal waters of Yongdam, northwest of Jeju Island in November 2002. H. hilgendorfi ritteri was solitary ascidian and produced spheral eggs with egg size ranging from $0.33\pm0.01\;mm.$ On the outer surface of the vitelline coat are attached many follicle cells. At $21.0\pm0.5^{\circ}C$ of water temperature, first cleavage took place in about 1.5 hrs after fertilization, and gastrulation followed in about 12.5 hrs. The formation of tailbud embryos and free swimming larvae were observed 13.3 hrs and 20.5 hrs after fertilization, respectively. The size of newly hatched tadpole larva was 1.30-1.45 mm, the larva swam for 2 hrs to 14 hrs. At 4 hrs after hatching, the palpi were lost and tail absorption began with an abrupt rupture of the anterior end of the notochord. At 17-18 hrs after hatching, tail completely absorption and remained trunk. The coniform adhesive papilla began protrusion at 30 hrs after hatching. The oral and atrial siphon formed at 6-7 days after settlement. At 17-18 days after settlement, metamorphosed the larvae developed into protoascidian of which the external morphology was similar to their adult.


  • 주제어

    Ascidian .   Halocynthia hilgendorfi ritteri .   Early development .   Metamorphosis .   Tadpole larva.  

  • 참고문헌 (17)

    1. Choi, Y.J. 2003. Reproductive cycle and early development of the ascidian Halocynthia hilgendorfi ritteri. MS. Thesis, Cheju Natl. Univ., Jeju, pp. 16-19. (in Korean) 
    2. Cloney, R.A. 1961. Observations on the mechanism of tail resorption in ascidians. Am. Zool., 1, 67-87 
    3. Cloney, R.A. 1982. Ascidian larvae and the events of metamorphosis. Am. Zool., 22, 817-826. 
    4. Cloney, R.A. 1990. Urochordata-Ascidiacea, In: Repro- ductive Biology of Invertebrate. Adiyodi, K.G. and R.G. Adiyodi, eds. Oxford and IBH, New Delhi, pp. 391-451 
    5. Conklin, E.G. 1905. The organization and cell lineage of the ascidian egg. J. Acad. Nat. Sci. (Philadelphia), 13, 1-119 
    6. Crisp, D.J. and A.F.A.A. Ghobashy. 1971. Responses of the larva of Diplosoma listerianum to light and gravity. In: Proceedings of the 4th European marine biology symposium. Crisp, D.J., ed. Cambridge Uni- versity Press, London, U.K., pp. 443-465 
    7. Kessel, R.G. 1983. Urochordata-Ascidiacea. In: Repro- ductive Biology of Invertebrates, Vol. 1. Adiyodi K.G. and R.G. Adiyodi, eds. Wiley, New York, pp. 655- 734 
    8. Kowalevsky, A. 1866. Entwicklungsgeschichte der ein-fachen Ascidien. Mem l'Acad St Petersbourg. Ser 7, 10, 1-19 
    9. Lash, J.W., R.A. Cloney and R.M. Minor. 1973. The effects of cytochalasin B upon tail resorption and metamor-phosis in ten species of ascidians. Biol. Bull., 146, 360-372 
    10. Na, G.H. and T.Y. Lee. 1977. Early development and larval distribution of ascidians, Styela clava Herdman and Ciona intestinalis (Linne). Pub1. Inst. Mar. Sci. Natl. Fish. Univ. Busan, 10, 41-56. (in Korean) 
    11. Numakunai, T., M. Ishikawa and E. Hirai. 1964. Changes of structure stainable with modified Gomori's aldehyde-fuchsin method in the tadpole larvae of the ascidian, Halocynthia roretzi (V. Drasche), relating to tail resorption. Bull. Mar. Biol. Stat. Asamushi, Tohoku Univ., 12, 161-172 
    12. Park, Y.J., Y.G. Rho, J.H. Lee and J.M. Lee. 1991. Studies on spawning and seed collection of sea squirt, Halocynthia roretzi (V. Drasche). Bull. Natl. Fish. Res. Dev. Inst. Korea, 45, 165-173. (in Korean) 
    13. Pyen, C.K., Y.G. Rho and Y.J. Chang. 1977. Studies on the early development and seed collection of the sea squirt, Halocynthia roretzi. Bull. Natl. Fish. Res. Dev. Inst. Korea, 18, 113-122. (in Korean) 
    14. Richard, A.G. 1982. Ascidian larvae and events of meta-morphosis. Am. Zool., 22, 817-826 
    15. Reverberi, G. 1971. Experimental Embryology of Marine and Fresh-Water Invertebrates. North Holland, Ams- terdam, pp. 507-550 
    16. Satoh, N. 1999. Cell fate determination in the ascidian embryo. In: Cell Lineage and Fate Determination. Moody, S.A., ed. Academic Press, New York, pp. 59-74 
    17. Wada, S., Y. Katsuyama and H. Saiga. 1999. Antero-posterior patterning of the epidermis by inductive influences from the vegetal hemisphere cellre c the ascidian embryo. Development, 126, 4955-4963 

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