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| Kavamoto,Emico T; Ferraz,Eduardo de M; Talmelli,Elaine F. de Andrade; Mainardes-Pinto,Cleide S.R; Romagosa,Elizabeth; Narahara,Massuka Y; Barnabe,Valquiria H; Campos,Benedicto do E.S. de. |
| Sperm of 180 three year old males of curimbatá, Prochilodus scrofa (Steindachner, 1881), was collected to verify the possibility of utilization of these males more than one time, and to know how long after the hormonal induction would occur the highest production of milt. This experiment was carried out in 1991 and 1992. After sperm was collected, each male was stimulated by the first injection of five IU/g of hCG. Then, milt was collected at 8, 16, 24, 48, 72 and 96 hours before and after the first dose and at 16 hours before and after the second one. Mean volume values were, before hormonal injection, 0.22ml and after two doses of hCG, 106ml. Maximal production occurred between 16 and 24 hours after induction. Mean values of sperm concentration and total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prochilodus scrofa; Curimbatá; Spermiation; Hormonal induction. |
| Ano: 1996 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000100002 |
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| Kavamoto,Emico Tahira; Narahara,Massuka Yamane; Andrade-Talmelli,Elaine Fender de. |
| This Study Concerns the morphological changes of the testes of "curimbatá", Prochilodus scrofa (Steindachner, 1881) at the beginning of sperm production, before and after the hormonal injections. We examined 25 three year old males that were reared in tanks at the Experimental Fish and Frog Culturing Station of Pindamonhangaba of the Fisheries Institute of São Paulo. The testes were sampled at the start of sperm production, after the first hormone injection (5 IU/g for weight of hCG), and 14 days before and after a second injection. Testicle fragments of these specimens were fixed and embedded in historesin. At the beginning of sperm production, the milky-white gonad showed consistem superficial vascularization, exceeding thick sperm under light pressure.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Prochilodus scrofa; Fish; Testes; Morphology; Hormonal stimulation. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100008 |
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| Moreira,Renata Guimarães; Mimura,Olga Martins; Lima,Rossana L.V. Andrade; Bernardino,Geraldo. |
| Body fluid ionic content of fishes varies with ambient. Variations in the plasmatic ionic concentration have also been related with sex or maturation cycle, once that reproduction modifies metabolic processes. In fishes, the gallbladder is an important osmoregulatory organ. So, the present work has been focused on the relation of plasmatic and biliar electrolytes with sex and maturation cycle, of the teleost fish Prochilodus scrofa at the resting and mature stages of gonadal cycle. The animals (28 males and 30 females) were collected at Cachoeira de Emas (Pirassununga, São Paulo) and they were fasted for three days before the experiments. Deteminations of Na+, K+, Mg++, and Ca++ were made by spectophotometry and Cl- by microtitulation. Comparisons of ionic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Osteichthyes; Characiformes; Prochilodus scrofa; Bile; Plasma; Ionic content. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100019 |
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| Koberstein,Teresa Cristina Ribeiro Dias; Durigan,João Guilherme. |
| O gênero Prochilodus é amplamente distribuído pela América do Sul, incluindo várias espécies que apresenta certo grau de endemismo nas diferentes bacias. Essas espécies alimentam-se basicamente de detritos orgânicos, organismos do benton, e alimentações artificiais. O objetivo deste estudo foi testar três densidades de estocagem (0,5, 0,75, e 1 larva/litro) e dietas contendo dois níveis diferentes de proteína bruta (35 e 40% PB) nos parâmetros do crescimento e na taxa da sobrevivência do curimbatá, Prochilodus scrofa. As larvas foram estocadas em aquários experimentais de 100 litros, mantidos com volume de 60 litros, com o fluxo de água contínuo, proveniente de poço semi-artesiano. A maior média foi proporcionada pela ração com 40% de PB (1,66g ± 0,21). As... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Curimbatá; Densidade de estocagem; Prochilodus scrofa; Proteína bruta. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782001000100020 |
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