خداوندا سرنوشت مرا خير بنويس....
که آنچه را که تو زود مي خواهي، دير نخواهم
و چيزي را که تو دير مي خواهي، زود نخواهم
Knowledge on fish reproduction is of high relevance for basic fish biology and comparative evolution .Reproduction in fishes is regulated by the integration of endogenous neuroendocrine (gonadotropins), endocrine and autocrine / paracrine signals
with exogenous(enviromental) factors such as food availability,temperature and season.
The main endocrine regulators of gonadal sex differention and function are steroid hormones.
recent studies suggest that other hormones are also involved. most prominent among these factors are the insulin-like growth factors(Igfs).i.e Igf1,Igf2,and most resently Igf3.
Sexual differentiation goes along with cell proliferation and tissue growth suggesting that factors, particularly the insulin-like growth factors(igf1,igf2),that exert numerous essential functions in fish.
The primary stimulus for the synthesis of liver igfs and their release into the circulation is growth hormone (Gh) from the anterior pituitary.
Reproduction methods in fishs
Ovoviviparity
Oviparity
Progenesis
Enviromental factores effective in maturation fishs
که آنچه را که تو زود مي خواهي، دير نخواهم
و چيزي را که تو دير مي خواهي، زود نخواهم
Knowledge on fish reproduction is of high relevance for basic fish biology and comparative evolution .Reproduction in fishes is regulated by the integration of endogenous neuroendocrine (gonadotropins), endocrine and autocrine / paracrine signals
with exogenous(enviromental) factors such as food availability,temperature and season.
The main endocrine regulators of gonadal sex differention and function are steroid hormones.
recent studies suggest that other hormones are also involved. most prominent among these factors are the insulin-like growth factors(Igfs).i.e Igf1,Igf2,and most resently Igf3.
Sexual differentiation goes along with cell proliferation and tissue growth suggesting that factors, particularly the insulin-like growth factors(igf1,igf2),that exert numerous essential functions in fish.
The primary stimulus for the synthesis of liver igfs and their release into the circulation is growth hormone (Gh) from the anterior pituitary.
Reproduction methods in fishs
Ovoviviparity
Oviparity
Progenesis
Enviromental factores effective in maturation fishs
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