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	Provedor de dados 103 (1) 42 (1) 52 (1) 83 (1) 84 (1) Autor Azevedo,Marco Aurélio (3) Lampert,Vinicius Renner (3) Fialho,Clarice Bernhardt (2) Araújo,Francisco G. (1) BRAGA,FRANCISCO M.S. (1) CARMO,MICHELE A.F. (1) FERREIRA,FABIO C. (1) Gomes,Iracema D. (1) Nascimento,Aparecida A. (1) Oliveira,Beatriz A. Chagas de (1) SOUZA,URSULLA P. (1) Sales,Armando (1) Mais... Palavra-chave Spawning type (5) Reproductive period (3) Fecundity (2) Fin-ray hooks (2) Bryconamericus (1) Characidae fishes (1) Ecundity (1) Freshwater fish (1) Histology (1) Inseminating fish (1) Niche overlap (1) Niche width (1) Oocyte (1) Small size characins (1) Spermatocyte (1) Mais... Tipo do documento Info:eu-repo/semantics/article (5) Ano 2019 (1) 2018 (1) 2015 (1) 2007 (1) 2004 (1) País Brazil (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest 42 SOUZA,URSULLA P.; FERREIRA,FABIO C.; CARMO,MICHELE A.F.; BRAGA,FRANCISCO M.S.. ABSTRACT In this paper, we determined diet composition, reproductive periodicity and fecundity of Astyanax intermedius in a headwater stream of a State Park of an Atlantic rainforest. We also evaluated the influence of rainfall, water temperature and fish size on niche width and niche overlap. Sampling was conducted monthly throughout one year in the Ribeirão Grande stream, southeastern Brazil. Diet consisted of 31 food items with equal contribution of allochthonous and autochthonous items. Females were larger than males, and the mean sizes at first maturation were 4.44 cm and 3.92 cm, respectively. Based on 212 pairs of mature ovaries, the number of oocytes per female ranged from 538 to 6,727 (mean = 2,688.7). Niche width and niche overlap were not... Tipo: Info:eu-repo/semantics/article Palavras-chave: Characidae fishes; Niche overlap; Niche width; Spawning type. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502151 Reproductive biology of Bryconamericus stramineus Eigenmann, 1908 (Ostariophysi: Characidae) from the Rio Ibicuí, RS, Brazil 52 Lampert,Vinicius Renner; Azevedo,Marco Aurélio; Fialho,Clarice Bernhardt. Reproduction of Bryconamericus stramineus was described based on the analysis of 208 females and 166 males collected monthly in the Rio Ibicuí, from April 2001 through March 2002. Reproduction occurred between September and December, with a lower peak in February. The mean absolute fecundity was 371.3 (± 244.6) oocytes and the mean relative fecundity was 0.35 (± 0.08) oocytes/mg of total weight and the fish was a multiple spawner. A weak correlation between GSI of males and day length was observed. Other parameters (stomach repletion and hepatosomatic index, rainfall and temperature) did not show any correlation with GSI. However, some of these factors might act as "starters" of gonadal maturation. The presence and frequency of fin ray hooks on the males... Tipo: Info:eu-repo/semantics/article Palavras-chave: Reproductive period; Fecundity; Spawning type; Bryconamericus; Fin-ray hooks. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000700011 Reproductive biology of Bryconamericus iheringii (Ostariophysi: Characidae) from rio Vacacaí, RS, Brazil 83 Lampert,Vinicius Renner; Azevedo,Marco Aurélio; Fialho,Clarice Bernhardt. In this paper we describe some aspects of the reproduction and development of secondary sexual characters of Bryconamericus iheringii, based on the analysis of 194 females and 210 males collected monthly in the rio Vacacaí (30º21'34"S and 54º18'48"W), from April 2001 to March 2002. The reproductive period occurred from September to January (spring and summer in the Southern Hemisphere), as described for other characids of the same area. The absolute fecundity mean was 933.71 ± 303.10 oocytes, and the relative fecundity mean was 0.36 ± 0.08 oocytes per mg of total weight, being the species a multiple spawner. There was no correlation between the values of GSI and variation of biotic (stomach repletion and hepatosomatic indexes) and abiotic data (rainfall,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Reproductive period; Ecundity; Spawning type; Fin-ray hooks. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000400003 Non-seasonal reproduction in inseminating species of Mimagoniates (Characidae, Characiformes) from southern Brazil 84 Lampert,Vinicius Renner; Azevedo,Marco Aurélio. Abstract Some aspects of reproduction in two species of Mimagoniates, M. microlepis (Steindachner 1877) and M. rheocharis Menezes & Weitzman 1990 are herein described. Samples were taken monthly from January 1998 to February 1999 in two streams in the locality of Maquiné, Rio Grande do Sul, Brazil. Results from the analysis of hundreds of specimens of M. microlepis and M. rheocharis in two investigated sites indicated mature specimens and peaks of the gonadosomatic index (GSI) along the year. There was a negative and significant correlation between M. microlepis male’s GSI and water temperature. Females of the latter species and both sexes of M. rheocharis, in turn, showed no correlation with any of the tested parameters (relative stomach weight, day... Tipo: Info:eu-repo/semantics/article Palavras-chave: Inseminating fish; Small size characins; Reproductive period; Fecundity; Spawning type. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100201 Gonadal development and reproductive period of the characin Astyanax aff. bimaculatus (Characiformes: Characidae) in a tropical reservoir in southeastern Brazil 103 Araújo,Francisco G.; Nascimento,Aparecida A.; Gomes,Iracema D.; Sales,Armando; Oliveira,Beatriz A. Chagas de. ABSTRACT The gonadal development of the characin Astyanax aff. bimaculatus from Funil Reservoir, an impoundment in the middle reaches of the Paraiba do Sul River in southeastern Brazil was analysed through histological, histochemical and histometric techniques, and the spawning season was determined. Unbalanced sex ratio was found, with females outnumbering and reaching larger sizes than males. The following stages of oogenic cell development were identified for females: primary growth, pre-vitellogenic (cortical alveolar) and vitellogenic. In males, the following stages were determined: spermatogonia primary and secondary, spermatocyte primary and secondary, spermatid and spermatozoa. The spawning occurs most of the year, peaking in January-February, as... Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fish; Histology; Oocyte; Spawning type; Spermatocyte. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100326 Registros recuperados: 5 Primeira ... 1 ... Última

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