Consulta: creatorFacets:"Querat, B"
Registros recuperados: 2
Data/hora: 10/06/2024 04:37:45

Effects of rapeseed meal-glucosinolates on thyroid metabolism and feed utilization in rainbow trout
Provedor de dados: 5
Autores: Burel, Christine; Boujard, Thierry; Kaushik, Sadasivam; Boeuf, Gilles; Mol, K; Van Der Geyten, S; Darras, V; Kuhn, E; Pradet Balade, B; Querat, B; Quinsac, A; Krouti, M; Ribaillier, D.
Two rapeseed meals (RM1 and RM2), containing glucosinolates at a concentration of 26 and 40 mumol/g, respectively, were incorporated at increasing levels (10, 20, and 30% for RM1 and 30 and 50% for RM2) in diets of juvenile rainbow trout. Disturbances in the thyroid axis appeared after 14 days of feeding (with a dietary incorporation level of 10%). The dietary supplementation with T-3 or iodine induced an increase in plasma T-3 levels, compared to that in fish fed the RM diets, and reduced the deleterious effect of RM on growth. When trout were reared in seawater, there was also a slight increase in thyroid hormone levels. TSH treatment had no effect on the thyroid hormone plasma levels. The incorporation of 30% of RM1, which induced a lower dietary...
Tipo: Text
Palavras-chave: Rainbow trout; Iodine; TSH; Deiodinase activity; Thyroid function; Growth; Glucosinolates; Rapeseed.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-677.pdf

Role of steroid hormones and external factors in the control of pituitary gonadotropic activity of female European eel (Anguilla anguilla ).
Provedor de dados: 5
Autores: 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 (&lt; 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