KRISHI
ICAR RESEARCH DATA REPOSITORY FOR KNOWLEDGE MANAGEMENT
(An Institutional Publication and Data Inventory Repository)
"Not Available": Please do not remove the default option "Not Available" for the fields where metadata information is not available
"1001-01-01": Date not available or not applicable for filling metadata infromation
"1001-01-01": Date not available or not applicable for filling metadata infromation
Please use this identifier to cite or link to this item:
http://krishi.icar.gov.in/jspui/handle/123456789/62359
Title: | Ultrastructural studies of oogenesis in the variable abalone Haliotis varia (Vetigastropoda: Haliotidae) |
Other Titles: | Not Available |
Authors: | Najmudeen,T M |
ICAR Data Use Licennce: | Not Available |
Author's Affiliated institute: | Not Available |
Published/ Complete Date: | 2008 |
Project Code: | Not Available |
Keywords: | Female germ cells Haliotis varia Ovarian maturation Variable abalone Ultrastructural studies Vitellogenesis |
Citation: | Not Available |
Series/Report no.: | Not Available |
Abstract/Description: | Ultrastructural features of the ovary as well as oogenesis were examined in the variable abalone Haliotis varia with the help of transmission electron microscopy. Based on the ultrastructure, the female germ cells were divided into 5 stages; oogonia, pre-vitellogenic, early vitellogenic, late vitellogenic and mature oocytes. Oogonia were supported by follicle cells that lined up the inner walls of the ovary. Vitellogenesis in H. varia commenced at about 50 μm oocyte diameter, with a major contribution by the autosynthetic pathway. Lipid droplets and protein yolk granules, measuring 2.3 ± 0.2 and 2.5 ± 0.3 μm, respectively, were observed in late vitellogenic and mature oocytes. Vitellogenic oocytes were encircled by a vitelline envelope consisting of a single layer of about 2.3 μm thickness. Numerous microvilli were embedded in the vitelline envelope. Cytoplasmic inclusions such as cortical granules, lipid droplets, mitochondria and yolk granules constituted the fundamental components of the mature oocyte. The cortical granules were arranged beneath the oolemma at the cortex of the oocyte. Oocyte degeneration in H. varia was observed in all stages of oocyte development, except in oogonial cells and pre-vitellogenic oocytes |
Description: | Not Available |
ISSN: | Not Available |
Type(s) of content: | Article |
Sponsors: | Not Available |
Language: | English |
Name of Journal: | Aquatic Biology |
Volume No.: | 2 |
Page Number: | 143-151 |
Name of the Division/Regional Station: | Not Available |
Source, DOI or any other URL: | http://eprints.cmfri.org.in/8551/1/7Aquat._Biol.__Najmudeen_2008.pdf |
URI: | http://krishi.icar.gov.in/jspui/handle/123456789/62359 |
Appears in Collections: | FS-CMFRI-Publication |
Files in This Item:
There are no files associated with this item.
Items in KRISHI are protected by copyright, with all rights reserved, unless otherwise indicated.