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1
題名:Development of Ovarian Tissue and Female Germ Cells in the Protandrous Black Porgy, Acanthopagrus schlegeli (Perciformes, Sparidae)    
著者:Mong-Fong LeeJing-Duan HuangChing-Fong Chang
出版地區:台灣
出版城市:台北市
學科:生命科學 ; 醫學綜合
關鍵字:Gonadal development ; Sex differentiation ; Sex change ; Fish ; Oocyte development
刊名:Zoological Studies
頁碼:302-316
語言:英語
摘要: 英文摘要PDF

The morphology of developing bisexual gonads and female germ cells in the protandrous black porgy, Acanthopagrus schlegeli (Sparidae), is described using light and electron microscopy. The central (ovarian) cavity and sex differentiation were observed in the differentiating gonad at 5 mo of age. Testicular tissue was the main tissue in the gonad with a small portion of ovarian tissue limited to the area around the central cavity and main blood vessel. Oogonia which were grouped as cell nests in the germinal epithelium and oocytes appeared during the period from the differentiated gonad to the 1st spawning period. Ovarian lamellae, containing oogonia and primary oocytes, developed towards the central cavity after the 1st spawning season. The testicular tissue regressed but ovarian tissue developed during the non-spawning period in 1+-and 2+-yr-old fish. Female germ cells were classified into oogonia, chromatin-nucleolus oocytes, perinucleolar oocytes, cortical alveolar oocytes, vitellogenic oocytes, and maturing oocytes. Only primary oocytes, the most advanced type of oocyte, could be found in the bisexual ovary before the occurrence of the sex change. Testicular tissue regressed together with the development of vitellogenic oocytes during the sex change in some 3-yr-old fish. A blood vessel reached each oocyte. There were light and dark electron-dense areas in the germinal epithelium connected by cell junctions. Oogonia and oocytes had many mitochondria and highly electron-dense structures such as cement and nuage. Granulosa and theca cells surrounded the oocytes. Organelles such as mitochondria, endoplasmic reticula, and Golgi bodies were found in the highly electron-dense area of granulosa cells at the vitellogenic oocyte stage. Microvilli extended from oocytes through the zona radiata to granulosa cells. The developmental profile of ovarian lamellae in ovarian tissue and changes in the testicular/ovarian tissue in the bisexual gonad were further summarized. These histological data provide important information for further studies on the molecular mechanism of sex differentiation and sex change in the protandrous black porgy.


    

本卷期目次
Zoological Studies
Effects of Troop Size on Social Relations among Male Formosan Macaques, Macaca cyclopis/ Tai-Jung LinGovindasamy AgoramoorthyChih-Chien HuangMinna J. Hsu
Description of Adults, Preimaginal Phases, and the Venom Apparatus of a New Species of Aspilota Forster from Spain (Hymenoptera: Braconidae)/ Maximilian FischerJosep TormosXavier PardoJosep Daniel Asis
Spatial and Seasonal Variations in Chaetognath Assemblages in Two Subtropical Marine Inlets with Different Hydrographical Characteristics/ Pan TseSami SouissiJiang-Shiou HwangQing-Chao ChenChong Kim Wong
Factors Affecting Invasive Species Abundance: The Barbary Ground Squirrel on Fuerteventura Island, Spain/ Marta Lopez-DariasJorge M. Lobo
Construction of an Indian Muntjac BAC Library and Production of the Most Highly Dense FISH Map of the Species/ Chyi-Chyang LinPei-Ching HsuTzai-Shiuan LiShu-Ju LiaoYa-Ming ChengLie-Jiau HsiehYueh-Chun Li
Cooption of Neo-X and Neo-Y Chromosomes in Drosophila albomicans/ Sung-Han LinYu-Yang HuangHwei-Yu Chang
Development of Ovarian Tissue and Female Germ Cells in the Protandrous Black Porgy, Acanthopagrus schlegeli (Perciformes, Sparidae)/ Mong-Fong LeeJing-Duan HuangChing-Fong Chang
A Sea Anemone Outbreak Eliminates Damselfish Territories from Fringing Reefs in Southern Taiwan/ Tsen-Chien ChenCheng-Tze HoRong-Quen Jan
Sexual Polymorphism in a Population of Strombus canarium Linnaeus, 1758 (Mollusca: Gastropoda) at Merambong Shoal, Malaysia/ Zaidi Che CobAziz ArshadMohd Hanafi IdrisJapar Sidik BujangMazlan Abd Ghaffar
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Multi-Gene Analyses of the Phylogenetic Relationships among the Mollusca, Annelida, and Arthropoda/ Donald J. ColganPatricia A. HutchingsEmma Beacham
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Mitochondrial DNA Diversity of Tor tambroides Valenciennes (Cyprinidae) from Five Natural Populations in Malaysia/ Yuzine B. EsaSiti Shapor SirajSiti Khalijah DaudKhairul Adha A. RahimJeffrine Rovie Ryan JapningSoon Guan Tan
Molecular Phylogenetics among Three Families of Bats (Chiroptera: Rhinolophidae, Hipposideridae, and Vespertilionidae) Based on Partial Sequences of the Mitochondrial 12S and 16S rRNA Genes/ Xiao-Ming GuShu-Yan HeLei Ao
 
   
 
   

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