민어, Miichtys miiuy (Basilewsky)의 성장과 연관된 생식소 발달 KCI OTHER

Title
민어, Miichtys miiuy (Basilewsky)의 성장과 연관된 생식소 발달
Alternative Title
Gonad Ontogeny in Relation to Somatic Growth in the Brown Croaker Miichthys miiuy (Basilewsky)
Author(s)
박인석; 설동원; 임수연; 박민욱; 허우준; 조성환; 송영채; 김재수; 조효제; 노충환; 최희정
KIOST Author(s)
Noh, Choong Hwan(노충환)Choi, Hee Jung(최희정)
Publication Year
2007-06
Abstract
부화부터 부화 후 120일까지 민어, Miichthys miiuy (Basilewsky)의 성분화를 조사하였다. 시원세포는 부화 후 20일(전장 10.4 mm, 체중 0.14 g)에 출현하여 부화 후 40일(전장 19.4 mm, 체중 0.39 g)에 복강으로 이동하기 시작하였다. 부화 후 65일(전장 31.3 mm, 체중 0.93 g, 1,560D∘ (적산온도))에 응축된 염색질 상태인 시원세포는 감수분열을 보여 난소로의 분화가 확인되었다. 부화후 120일(전장 4.60 mm, 체중 1.38 g, 2,880D∘ )에 난모세포는 주변인기 단계로 직경이 20∼40μm 로 증가하였다. 성분화후 난모세포는 크기 증가를 보인 반면, 정소는 부화 후 65일부터 증식하기 시작하였다. 부화 후 80일(전장 37.9 mm, 체중 1.39 g, 1,920D∘ )에 정소 체세포에 싸여진 정원세포 낭포의 출현과 정소 소엽 형성이 시작되었다. 부화 후 120일에 정소 소엽에는 시원세포와 정모세포가 존재하였다. 본 연구 결과 민어의 성분화 양상은 분화형자웅이체이다.

Sex differentiation of the brown croaker Miichthys miiuy (Basilewsky) is described from hatching to the 120th day post-hatching (dph) (water temperature 24∘C ). Primordial germ cells (PGCs) were observed on the 20th dph (10.4 mm total length (TL), 0.14 g body weight (BW), and began to protrude into the peritoneal cavity from the 40th dph (19.4 mm TL, 0.39 g BW). On the 65th dph (31.3 mm TL, 0.93 g BW, 1,560D∘ (degree-days)), initial ovarian differentiation was identified by the PGCs with condensed chromatin, and their transformation into meiotic oocytes. By the 120th dph (4.60 mm TL, 1.38 g BW, 2,880D∘ ), the oocytes were in the perinucleolus stage and had increased from 20 to 40μm in diameter. While ovaries gradually grew after sex was differentiated, testes continued to multiply from the 65th dph. On the 80th dph (37.9 mm TL, 1.39 g BW, 1,920D∘ ), the beginning of testis lobule formation was indicated by the occurrence of spermatogonial cysts enveloped by somatic cells in some of the testes. On the 120th dph, the testis lobules of some of the fish contained all germ cell stages through to the spermatocytes. Therefore, the sex differentiation type of the brown croaker is identified as gonochoristic.
ISSN
1225-8598
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1926
Bibliographic Citation
한국어류학회지, v.19, no.2, pp.107 - 111, 2007
Publisher
한국어류학회
Keywords
differentiated gonochorism; gonadal development; growth; Miichthys miiuy
Type
Article
Publisher
한국어류학회
Related Researcher
Research Interests

Fish genetics and breeding,Living modified organism,Sbtropical mariculture,어류유전육종,어류형질전환,아열대어류양식

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