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Action of two endocrine disrupters on the sexual differenciation of Nile tilapia Rev. Ciênc. Agron.
Passos Neto,Oscar Pacheco; Santos,André Bezerra dos; Silva,José Roberto Feitosa; Mota,Suetônio Bastos.
ABSTRACT Endocrine disruptors are exogenous substances that can impair one or more functions of the endocrine system and cause adverse effects to the health of an intact organism. The main goal of this study was to evaluate the effect of the endocrine disruptors 17β-estradiol (E2) and 17α-ethinyl estradiol (EE2) on the sexual differentiation of Nile tilapia during spawning. Six treatments and one control with three replications, totalizing 21 experimental units, were assessed in a completely randomized design. Hormones were dosed at concentrations of 250, 500, and 1,000 ng L−1 (treatments E2-250, E2-500, E2-1,000, EE2-250, EE2-500, and EE2-1,000). Exposure to hormones occurred during the first 28 days of life. After this...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Emerging pollutants; Oreochromis niloticus; 17α-ethinylestradiol; 17β-estradiol.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300402
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Superovulação em coelhas alimentadas com ração, contendo diferentes fontes de óleos vegetais - DOI: 10.4025/actascianimsci.v28i3.45 Animal Sciences
Andreazzi, Márcia Aparecida; Cesumar; Rigolon, Luiz Paulo; UEM; Cavalieri, Fábio Luiz Bim; Cesumar; Scapinello, Cláudio; UEM; Moraes, Gentil Vanini de; UEM; Faria, Haroldo Garcia de; UEM.
Effects of super-ovulation on 40 rabbit does were evaluated. Females were distributed in a completely randomized design, with four treatments (oil-free ration and rations with 3% canola oil, corn oil or soybean oil) and 10 replications. Each doe received a unique intramuscular dose of 40 UI of equine corionic gonadotrophin (eCG); 48 hours later they underwent breeding. After 72 hours of breeding, the does were slaughtered and 10mL blood samples were collected for progesterone and 17β-estradiol serum level analyses. Other parameters, such as weight of uterus with ovaries, number of follicles and of corpora lutea, were obtained. Embryos were recovered by three flushings, per uterine corn, with Dulbecco extender (PBS). The...
Palavras-chave: 5.04.03.00-1 Nutrição e Alimentação Animal coelhas; 17β-estradiol; Óleos poliinsaturados; Progesterona.
Ano: 2006 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/45
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