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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

An ultrastructural study of early cleavage in Mytilus

Elvin, Patricia J. 30 November 1972 (has links)
Ultrastructural analysis and chemical inhibition studies were carried out on first cleavage of Mytilus zygotes to determine possible relationships between the mitotic apparatus and the cortex during polar lobe formation. The stages of mitosis correlated with the appearance of the polar lobe were first determined by light microscopy. The polar lobe does not appear until anaphase of first cleavage. The early polar lobe is symmetrical in position at the vegetal pole, but at late anaphase it shifts position towards the side of the future CD blastomere. During cytokinesis the furrow at the vegetal pole is displaced by the polar lobe resulting in an unequal division. Ultrastructural study at anaphase shows astral microtubules penetrating the polar lobe. At the animal pole microtubules reach almost to the cortex. When furrowing begins cortical granules move into the furrow region at both the animal and vegetal poles. An amorphous electron dense area is present just below the plasma membrane in all cell furrows. This region may correspond to a contractile band of microfilaments. Cell division inhibitors were used to analyze the role of microtubules and microfilaments in Mytilus cleavage. Prior to anaphase, mercaptoethanol, an inhibitor of microtubule function, halts cell division in Mytilus. Before the mitotic apparatus is formed, mercaptoethanol also prevents polar lobe formation. Polar lobe formation can occur in the inhibitor once the mitotic apparatus has begun to form. Cytochalasin B which destroys microfilaments inhibits both polar lobe formation and cytokinesis in Mytilus. Once the polar lobe has appeared, it is resorbed when the cells are placed in cytochalasin. It is suggested that both microtubules and a contractile band of microfilaments play a role in first cleavage. Initial polar lobe formation could be triggered by microtubules of the mitotic apparatus penetrating the vegetal pole whereas final constriction of the definitive polar lobe and the cleavage furrow may be caused by microfilaments. / Graduation date: 1973
2

Trace metals in mussels tranplanted to San Francisco Bay

Smith, Donald R. January 1985 (has links)
Thesis (M.A.)--San Francisco State University. / Typescript. Includes bibliographical references (leaves 16-19).
3

Effects of environmental stress on intertidal mussel reproduction /

Petes, Laura E. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 153-167). Also available on the World Wide Web.
4

Effects of environmental stress on intertidal mussel reproduction /

Petes, Laura E. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2007. / Printout. Includes bibliographical references (leaves 153-167). Also available on the World Wide Web.
5

The population dynamics, growth and reproduction of Perna Viridis (Linnaeus, 1758) (Bivalvia: Mytilacea) in Hong Kong /

Lee, Shing-yip. January 1985 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1985.
6

Predictive modeling of freshwater mussels (Unionidae) in the Appalachians

Mynsberge, Alison R. January 2008 (has links)
Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains vii, 127 p. : maps. Includes abstract. Includes bibliographical references.
7

Development of a diet for rearing juvenile freshwater mussels /

Gatenby, Catherine M., January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 95-109). Also available via the Internet.
8

Macrohabitat factors affecting distribution patterns of freshwater mussels in the Clinch River (Virginia, Tennessee)

Church, Gregory Warren. January 1997 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1997. / Vita. Includes bibliographical references (leaves 126-132).
9

Genetic aspects of Mytilus edulis in relation to spawning and hatchery culture

Del Rio Portilla, Miguel Angel January 1996 (has links)
No description available.
10

Bioadhesion of Mytilus edulis

Young, Grace Amanda January 1983 (has links)
No description available.

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