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	Provedor de dados ArchiMer (1) Autor Dufour, S (1) Fontaine, Y (1) Leloup, H (1) Querat, B (1) Palavra-chave Anguilla anguilla (1) Anguille (1) Anguillidae (1) Environmental factors (1) Facteurs externes (1) Gonadotropine (1) Migrations (1) Ovaries (1) Pisces (1) Pituitary gland (1) Salinity (1) Sex hormones (1) Sexual maturity (1) Sexual reproduction (1) Steroids (1) Steroids sexuels (1) Mais... Tipo do documento Text (1) Ano 1983 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Role of steroid hormones and external factors in the control of pituitary gonadotropic activity of female European eel (Anguilla anguilla ). ArchiMer Leloup, H; Fontaine, Y; Dufour, S; Querat, B. Gonadotropic activity is relatively low in the female freshwater (FW) eel (A. anguilla ): pituitary GTH was about 15 ng equivalent cGTH/mg fresh tissue. Plasma GTH was always less than 1 ng equivalent cGTH/ml and often undetectable (< 0.2 ng equivalent cGTH/ml). Ovarian steroidogenesis in FW fish is similarly low; plasma concentration of both free testosterone (T) and free estradiol (E sub(2)) were less than 0.3 ng/ml as measured by RIA. Treatment with E sub(2) in FW fish caused a great increase in pituitary GTH, up to 1000 times control values, without changing plasma GTH. Stimulation of gonadotropic activity and ovarian development occur during the eel's migration to the Sargasso Sea. Adaptation to seawater (SW) caused a great increase of plasma E... Tipo: Text Palavras-chave: Anguilla anguilla; Anguillidae; Pisces; Migrations; Salinity; Environmental factors; Pituitary gland; Sexual reproduction; Ovaries; Sexual maturity; Steroids; Sex hormones; Facteurs externes; Steroids sexuels; Gonadotropine; Anguille. Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1217.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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