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	Provedor de dados Arq. Bras. Med. Vet. Zootec. (1) BJMBR (1) Autor Borella,M.I. (2) Batlouni,S.R. (1) Gazola,R. (1) Leonardo,A.F.G. (1) Romagosa,E. (1) Palavra-chave 11-ketotestosterone (1) Atretic follicle (1) Cachara (1) Histology (1) Ovarian regression (1) Pseudoplatystoma fasciatum (1) Radioimmunoassay (1) Reproductive cycle (1) Teleost fish (1) Testosterone (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2006 (1) 1997 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Occurrence and significance of ovarian and follicular regression in cachara Pseudoplatystoma fasciatum (Linnaeus, 1766): a histology approach Arq. Bras. Med. Vet. Zootec. Leonardo,A.F.G.; Romagosa,E.; Batlouni,S.R.; Borella,M.I.. The processes of ovarian regression and follicular atresia which reproduction was not induced by hormone in confined cachara, Pseudoplatystoma fasciatum, were investigated. The macro and microscopic characteristics (oocytes diameter and histology) of the ovaries were described every 20 days, in four stages: initial regression (Rg I = first 20 days), intermediate regression (Rg II = from 21st to 40th day), final regression (Rg III = from 41st to 80th day) and the recovering stage, called resting II (R II = from 81st to 150th day). The experiment was conducted from late January (summer - longer days) to May (autumn - shorter days). In the beginning, A0 samples showed oocyte diameters ranging from 437.5 to 1,187.5mm, suggesting that oocytes were in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cachara; Pseudoplatystoma fasciatum; Ovarian regression; Atretic follicle; Histology. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000500019 Plasma testosterone and 11-ketotestosterone levels of male pacu Piaractus mesopotamicus (Cypriniformes, Characidae) BJMBR Gazola,R.; Borella,M.I.. The levels of testosterone (T) and 11-ketotestosterone (11-KT) of the South American pacu Piaractus mesopotamicus were determined by radioimmunoassay during two stages of the reproductive cycle, i.e., resting and maturation, and the gonadosomatic index (GSI) was calculated. The highest levels of T and 11-KT were reached during the maturation stage (T = 2400 ± 56 pg/ml; 11-KT = 2300 ± 60 pg/ml) and lower levels were maintained during the resting period. The rise in androgen levels occurred with the appearance of spermatozoa in the maturation stage, when GSI was highest Tipo: Info:eu-repo/semantics/article Palavras-chave: Teleost fish; Testosterone; 11-ketotestosterone; Radioimmunoassay; Reproductive cycle. Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200017 Registros recuperados: 2 Primeira ... 1 ... Última

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