Oogenesis in a tropical loach Lepidocephalus thermalis (Cuv. & Val.)

Rita Kumari, S. D. ; Nair, N. Balakrishnan (1979) Oogenesis in a tropical loach Lepidocephalus thermalis (Cuv. & Val.) Proceedings of the Indian Academy of Sciences - Animal Sciences, 88 (1). pp. 45-54. ISSN 0253-4118

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Official URL: http://www.ias.ac.in/jarch/procb/88b/45-54.pdf

Related URL: http://dx.doi.org/10.1007/BF03179623


The development of oocytes has been traced in detail in the loach Lepidocephalus thermalis. The various stages of oocytes are described under distinctive stages namely 1. chromatin nucleolus stage; 2. perinucleolus stage; 3. yolk vesicle stage; 4. primary yolk stage; 5. secondary yolk stage; 6. tertiary yolk stage; 7. migratory nucleus stage; 8. pre-ripening stage; 9. ripe egg stage. The yolk deposition is initiated as minute globules in the extravesicular ooplasm. A yolk nuclous is entirely wanting in any stage of oocyte maturation. The origin of new crops of oocytes and the formation of the micropyle are described. Nature of degeneration of unextruded ripe oocytes has been followed.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Lepidocephalus thermalis (Cuv. and Val.); Oogenesis; Maturing Stages Of Oocytes; Yolk Formation; Germinal Vesicle; Micropyle
ID Code:25842
Deposited On:04 Dec 2010 11:31
Last Modified:17 May 2016 09:15

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