by University of Aston. Department of Molecular Sciences in Birmingham .
Written in English
Thesis (PhD) - University of Aston in Birmingham, 1985.
Ultrastructural study of cytodifferentiation in the ovarian follicle of the Nile tilapia, Oreochromis niloticus, was carried out during the period of oocyte growth with special reference to the Oocyte growth and development is an important issue in fish and fisheries biology. This paper reviews the information available on oocyte growth patterns and the rates and dynamics of oocyte growth in teleosts. In synchronous spawners, the weight of the gonad may represent as much as 40% of the overall body weight of the fish. In asynchronous spawners, the weight of the mature ovary is Abstract: Sex steroids are involved in all aspects of the regulation of reproductive processes in vertebrates. Teleost fish produce several types of bioactive gonadal steroids, including estrogens, progestogens, androgens and numerous other :// R. Van Den Hurk, J. PeuteCyclic changes in the ovary of the rainbow trout, Salmo gairdneri, with special reference to sites of steroidogenesis Cell Tissue Res.,
Leuprorelin acetate for the preservation of ovarian function. Ovarian function of the trout preovulatory ovary New This report describes the dynamics of oocyte growth during vitellogenesis in a population of virgin female rainbow trout. Indices of ovarian development increased dramatically during the period of Ovarian follicular atresia and postovulatory regression in mammals is mediated by apoptosis, which is a natural occurring cause of cellular death. The ovarian cycle of rainbow trout with special reference to atresia. Dissertation, University of Aston. Drummond, G.D., Bazzoli, N., Rizzo, E. and Sato, Y., Postovulatory follicle: A model Environmental stressors, such as food availability, contaminant exposure, and global warming, can potentially interfere with oogenesis by disrupting the brain-pituitary-gonad axis and inducing atresia of ovarian follicles (Babin et al., ; Yamamoto et al., ; Molina et al., ; Sullivan and Yilmaz, ).Atresia has been defined as a normal process that takes place inside the ovaries
Although, apoptosis may be a very important event during the ovarian cycle of C. gariepinus, the mechanism of the process were not explained in detail, in the present study. Janz and van der Kraak () suggested that apoptosis might have an important role in the selection and recruitment of follicles into vitellogenesis in Rainbow ://+and+Apoptosis+in+Pre-+and+Postovulatory. The striped bass and its relatives (genus Morone) are important fisheries and aquaculture species native to estuaries and rivers of the Atlantic coast and Gulf of Mexico in North America. To open avenues of gene expression research on reproduction and breeding of striped bass, we generated a collection of expressed sequence tags (ESTs) from a complementary DNA (cDNA) library representative of Under laboratory conditions, female rainbow trout were exposed to graded concentrations of water from the River Lambro, a polluted tributary of the River Po, and to the effluent of a large wastewater treatment plant which flows into the River Lambro. In field exposures, trout were held in cages in the River Po upstream and downstream from the confluence of the River :// Abstract. The rainbow trout Salmo gairdneri Richardson, which originates from the west coast of North America, was first described by Richardson in from specimens collected in the Columbia river. Initially, the rainbow trout was native to the coastal areas of the United States and Canada extending from Alaska as far south as ://