WebApr 14, 2024 · Oocyte growth is slow during the primary stage of oogonium proliferation and differentiation, with rapid growth mainly occurring during vitellogenin (VTG) synthesis . In some crustaceans, the ovary and the hepatopancreas are chiefly involved in vitellogenesis [ 5 ]; however, the initial signal underlying this process remains unclear. WebExperimental fish and ovarian development histology The redlip mullet used in this study were captured in coastal waters off Ganghwado, South Korea, during the spawning season (May–June). Oocytes were separated into groups using fine forceps. Oocytes with average diameters of 0.75 and 0.65 mm were used for the in vitro studies.
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WebJul 3, 2015 · In fish, delayed spawning in nature, delayed egg collection in capture and delayed fertilization after egg stripping can lead to oocyte ageing and over-ripening. Oocyte ageing is reported as... WebFeb 1, 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 … orc regional planning commission
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WebDec 23, 2015 · In fish, oocyte meiotic maturation is regulated by 17α, 20β-dihydroxy-progesterone through cAMP. To study the role of cAMP response element binding protein (CREB) in meiotic maturation, we cloned and characterized the expression pattern of CREBs from two fish models, the Nile tilapia and catfish. In the Nile tilapia three different … WebDec 9, 2005 · Fish oocytes provide an appropriate experimental system with which to investigate the molecular mechanisms controlling meiosis and the embryonic cell cycle. Several factors responsible for the regulation of meiotic maturation in … WebFeb 15, 2024 · Wild-caught hāpuku (Polyprion oxygeneios) spawn readily in captivity, but although first filial (F1) hāpuku complete vitellogenesis, females fail to undergo oocyte maturation and spawn or produce poor quality eggs.This study investigated whether administration of a synthetic agonist of gonadotropin-releasing hormone (GnRHa) could … iproperty inara