한국수산과학회

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  • pISSN : 2234-8395
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  • eISSN : 2234-1757

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kfas, vol. 53, no. 1, pp.90-97, February, 2020
DOI. https://doi.org/10.5657/KFAS.2020.0090

Microstructural Differentiation of the Oocyte in the Abalone
Haliotis discus hannai
북방전복(Haliotis discus hannai) 난모세포의 미세구조적 분화

김혜진·김현진1·김영숙2·이정식1*
국립수산과학원 남동해수산연구소, 1전남대학교 수산생명의학과, 2국립수산과학원 수산방역과

The purpose of this study was to provide basic information on sexual maturity and reproductive biology for the
management of biological resources in abalone Haliotis discus hannai. The nucleus of the oogonium occupied about
42% of the cytoplasm, and had a distinctive basophilic chromatin. The cytoplasm of previtellogenic oocytes was
homogeneous and the size of nuclear pores increased. Fine granular and vacuolar yolk granules were observed in
the cytoplasm of the initial vitellogenic oocyte. In this stage, the egg stalk and jelly membrane began to develop.
The nucleus of the active vitellogenic oocyte was located near the animal pole. Yolk granules were strongly acidophilic.
Lampbrush chromosomes were observed in the nucleus and rough endoplasmic reticulum. Annulate lamellae
developed in the cytoplasm. The shape of the ripe oocyte was rounded polygonal. The size of ripe oocytes was
202.9±21.40×142.1±18.82 μm and the thickness of the jelly membrane was 10.1±1.52 μm. These results show that
yolk accumulation in H. discus hannai is based on two methods: exogenous accumulation, through the egg stalk, and
endogenous accumulation, through intracellular organelles. Management of biological resources will be necessary
when oocytes predominate after the active vitellogenic stage.

Keyword : Haliotis discus hannai, Oocyte, Microstructural differentiation

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