Oocyte growth and development in teleosts
WebSix stages in the course of folliculogenesis were observed, determined by (1) the formation of follicular and thecal cellular layers and a collagen-filled space between them, (2) the development of microvilli of oocytal and follicular origin, (3) the differentiation of the vitelline envelope and the pore channels, (4) pinocytotic activity of the oocytes, and (5) rapid … WebAquaporins are believed to be involved in homeosmotic mechanisms of marine teleosts. Increasing data suggest that these molecular water channels play critical roles associated with the adaptation of gametes and early embryos to the external spawning environment. In this mini-review, we discuss recent studies suggesting the function of aquaporin …
Oocyte growth and development in teleosts
Did you know?
Web11 de abr. de 2024 · Prednisone is one of the most used synthetic glucocorticoids during pregnancy. Epidemiological investigations suggested that prenatal prednisone therapy … WebFinal oocyte maturation in teleosts. LH stimulates production of 17,20β-dihydroxyprogesterone (17,20β-DHP) (or a related progestogen), by follicle cells. This …
WebThe phases of the oocyte involved in the ovarian maturation were histologically described for five teleosts species from São Paulo coast. It was observed that the oocyte … WebTo assess potential differences in oocyte diameter among oocyte developmental stages, 3–5 of the most advanced stage oocytes (i.e., largest) from each fish were photographed at 1×–10× magnification using a microscope-mounted camera (Zeiss Axiocam ERc 5s or Leica IC80 HD; Carl Zeiss Microscopy LLC, White Plains, NY, USA and Leica Camera Inc., …
Web1 de fev. de 2010 · Three main types of ovarian development have been described for fish ( Wallace and Selman, 1981 ): (a) synchronous, where all oocytes develop and ovulate at … WebOocyte 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 …
Web26 de mar. de 2024 · To date, almost all the teleosts studied present the same basic pattern of oocyte growth. Generally, the oocyte growth can be classified into six steps (Tyler and Sumpter 1996) that will be shortly detailed below.However, since the aim of the present chapter is to describe the structure of the mature oocyte, the formation of the primordial …
Web29 de nov. de 2009 · of the rate of oocyte growth (G) and oocyte size (O) at the be-ginning (O b) and end (O e) of the spawning cycle, ISI can be estimated with the following formula: ISI = Oe −Ob G. (1) Equation (1) is only valid when G is stable throughout the spawning cycle. However, most pelagic spawners undergo oocyte hydration, which is known to … biofinity 1800 contactsWeb11 de abr. de 2024 · These dynamic expression patterns of cyp19a1a during development of ovarian follicles are presumably correlated with roles of E 2 in oocyte growth and maturation. The expression of cyp19a1a in ovarian follicles of teleosts was predominantly localized to follicular cells [11], [12], [13], [14]. biofinity 2week 乱視用Web1 de fev. de 2010 · Oogenesis in teleosts: how eggs are formed Gen Comp Endocrinol. 2010 Feb 1;165(3):367-89. doi: 10.1016/j.ygcen.2009.05.022. ... numerous circulating endocrine and locally-acting paracrine and autocrine factors regulate the various stages of oocyte development and maturation. daids protocol registration systemWebThe latter process, which is responsible for the preponderance of oocyte growth, includes the hepatic synthesis and secretion of vitellogenin (VTG), the uptake of VTG from the … biofinity 2week 通販biofinity 2 weekWeb1 de jan. de 2009 · The oocyte development of 34 females was classified into six stages (from early to late) as oogonial proliferation (OP), chromatin-nucleolus (CN), primary … biofinity 30 daysWebOocyte growth and development in teleosts (Q57919691) From Wikidata. Jump to navigation Jump to search. article. edit. Language Label Description Also known as; English: Oocyte growth and development in teleosts. article. Statements. instance of. scholarly article. 0 references. title. biofinity 55