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| Registros recuperados: 672 | |
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| Barradas,José R. S.; Lermen,Isabel S.; Larré,Gabriel G.; Martins,Thaís P.; Fontoura,Nelson F.. |
| ABSTRACT A weight-length relationship was established for Corydoras paleatus (Jenyns, 1842) (Siluriformes, Callichthyidae) (n=596) from samples taken in November-December 2009 and March-April 2010, in Pinguela Lagoon (29°46'57"S; 50°11'16"W), Rio Grande do Sul, Brazil. The species showed a polyphasic allometric growth pattern, each stanza described by an independent power equation controlled by a switch function: W = a1Lb1 ∙ (1 + eRsc ∙ (L-SCP))-1 + a2Lb2 ∙ [1 - (1 + eRsc ∙ (L-SCP))-1] ; where W is the expected weight for a specific length L, a1 and a2 are the proportionality coefficients for stanzas 1 and 2, b1 and b2 are the allometric coefficients for stanzas 1 and 2, Rsc is the stanza changing rate for the switch function and SCP is the stanza changing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometric growth; Length at first maturity; Reproduction; Sexual maturity; Length-weight relationship. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100217 |
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| Maragno,Franciéle P.; Cechin,Sonia Z.. |
| The aim of this study was to characterize, for the central region of the State of Rio Grande do Sul, Brazil, the reproductive biology of Leptodactylus fuscus (Schneider, 1799), based on the analysis of gonadal development of males and females, reproductive effort, size-fecundity relationships, and occurrence of sexual dimorphism in body size. Mature individuals were found from October 1996 to February 1997 and from October 1997 to December 1997. The highest input of juveniles in the population was recorded in March 1997. There was a positive and significant correlation between the number of mature individuals and the mean monthly temperature. The population did not present sexual dimorphism in size. Males presented significant correlation only between... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Reproduction; Subtropical climate. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000300002 |
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| Nunes,Daniela M.; Pellanda,Mateus; Hartz,Sandra Maria. |
| Oligosarcus jenynsii (Günther, 1864) and O. robustus Menezes, 1969 are fish species distributed in Rio Grande do Sul, Brazil, Uruguay, and northern Argentina. The reproductive period and recruitment, sex ratio, absolute and relative fecundity, and body length at first gonadal maturation of the two carnivorous species from Fortaleza Lagoon were analized. The specimens were sampled monthly, from May 2000 to April 2001, with fishing effort of 24 hours/month, using stationary gillnets of different mesh sizes and seine net (three samples per edge). The records of each individual included total length, total weight, gonad weight, sex and gonadal maturity stage. The reproductive period of both O. jenynsii and O. robustus ranges from May/June to November/December,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oligosarcus; Reproduction; Characidae; Southern Brazil. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100001 |
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| Dumont,Luiz Felipe Cestari; D'Incao,Fernando. |
| The stages of gonadal development for the female of "barba-ruça" shrimp (Artemesia longinaris Bate, 1888) were characterized based on histological analysis. Four stages (immature, almost mature, ripe and spawned) were determined according to the structure and arrangement of cells in the ovary. Each stage corresponds macroscopically to a characteristic color, except stages I (immature) and IV (spawned), in which colors are very similar and can be distinguished only microscopically. The chromatic scale varies from white/translucent (stage I), neutral green (almost mature) to dark green (ripe). The mean size of cells was 56.9 µm (±3.5) (stage I), 127 µm (±2.6) (stage II) and 183 µm (±1.91) (stage III). The size frequency of cells was polimodal, and different... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artemesia; Shrimp; Reproduction; Gonadal histology. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000400006 |
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| Rezende-Pinto,Fabíola M.; Verrastro,Laura; Zanotelli,Juliana C.; Barata,Paulo C. R.. |
| The reproductive cycle and sexual dimorphism of the lizard Cnemidophorus vacariensis Feltrim & Lema, 2000 were studied on the basis of data gathered between August 2004 and August 2006 in Vacaria, Rio Grande do Sul, Brazil. Snout-vent length (SVL) of sexually mature males varied between 48.8 and 72.9 mm (x = 63.3 ± 6.0 mm; n = 76) and, for females, between 57.4 and 81.8 mm (x = 70.0 ± 5.9 mm; n = 73). Other morphological characteristics were also compared between sexes. Reproduction was seasonal, and observations indicate two clutches in the same reproductive season. Clutch size and other reproductive characteristics were analyzed as well as the relation between reproduction and environmental factors. Cnemidophorus vacariensis is apparently endemic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teiidae; Cnemidophorus vacariensis; Reproduction; Sexual dimorphism; Conservation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000100012 |
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| Lima,Giovana V.; Soares,Marcelo R. S.; Oshiro,Lídia M.Y.. |
| The aim of this work was to gain knowledge about reproductive biology of the crab Armases rubripes (Rathbun, 1897) from an estuarine area of the Sepetiba Bay. Samples were taken monthly from February 2003 to January 2004 in the Sahy River estuary (22º56'S; 44º01'W), Rio de Janeiro, Brazil. The crabs were collected by hand during 15-minute catch-effort sessions conducted by two people. In the laboratory, the specimens were separated by sex, carapace width was measured and gonadal stage was checked macroscopically. A total of 830 individuals were caught - 304 males, 373 females (60 ovigerous females) and 153 juveniles. The ovigerous females were found almost year-round, except in November and April, showing a continuous reproductive period. They presented a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crab; Sesarmidae; Fecundity; Reproduction; Sexual maturity. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000100007 |
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| Lozovei,Ana Leuch. |
| During two consecutive years, from January 1985 to December 1986, a comparative study of mosquitoes preferences for breeding habitat was carried out in the Atlantic Forest of the Serra do Mar, Paraná State, Brazil. To achieve it, 1875 bamboo internodes aligned vertically in live green, bamboo plants Merostachys speciosa Munro and Merostachys sp. were used, in which metabolic water was exuded from the plant itself, and presenting different size/pattern holes at their lateral walls, bored by the local sylvan fauna. Another group of 1200 individual internode traps was used as comparative element, carved out with a transversal cut by a saw, filled with local stream water and held in branches at different heights in the vegetal strata nearby. At both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Culicidae; Reproduction; Bamboo internodes; Microhabitats. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000100001 |
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| Hartmann,Marilia T; Hartmann,Paulo A; Haddad,Célio F. B. |
| Reproductive modes and size-fecundity relationships are described for anurans from Picinguaba, a region of Atlantic rainforest on the northern coast of the state of São Paulo, Brazil. We observed 13 reproductive modes, confirming a high diversity of modes in the Atlantic rainforest. This diversity of reproductive modes reflects the successful use of diversified and humid microhabitats by anurans in this biome. We measured the snout-vent length of 715 specimens of 40 species of anurans. The size-fecundity relationship of 12 species was analyzed. Female snout-vent lengths explained between 57% and 81% of clutch size variation. Anurans with aquatic modes laid more eggs than those with terrestrial or arboreal modes. Larger eggs were deposited by species with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproduction; Anura; Clutch size; Community. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000300004 |
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| Braga,Francisco Manoel de Souza. |
| The most abundant species caught in the tributaries of the Volta Grande dam, Buriti, Divisa and Água Comprida streams were Plagioscion squamosissimus (Heckel, 1840), Pimelodus maculatus Lacépède 1803, Myleus tiete (Eigenmann & Norris, 1900), Astyanax bimaculatus (Linnaeus, 1758) and A. fasciatus (Cuvier, 1819). Plagioscion squamosissimus and Pimelodus maculatus do not have reproduction activity in the area, they just use the creeks to food and growth. Myleus tiete and Astyanax bimaculatus use the area to reproduction whereas A. fasciatus uses it to reproduction, food and growth. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproduction; Volta Grande dam; Reservoir. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200009 |
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| ENCARNAÇÃO, R. de O.; SCHENK, J. A. P.; ALVES. R. G. de O.. |
| Os adensamentos consistem em promover, periodicamente, rodeios (agrupar o rebanho de cria), sob a hipótese de que a aproximação de touros e vacas conduz a um maior índice de prenhez. Este trabalho teve como objetivo relatar a experiência de um estudo realizado para averiguar se essa pratica tem, efetivamente, o efeito esperado, bem como relatar as dificuldades encontradas. Foi conduzido numa propriedade particular representativa do Pantanal de Rio Verde de Mato Grosso, MS, no período de 1987 a 1990. Utilizaram-se 766 vacas neloradas e 46 touros da raça Nelore, mantidos em duas invernadas (pastagem nativa) de, aproximadamente, 1.500 hectares cada, cuja lotação foi de 3 hectares/unidade animal e a relação touro/vaca foi de 1:16. O ensaio envolveu dois... |
| Tipo: Circular Técnica (INFOTECA-E) |
Palavras-chave: Bovino de corte; Nelore; Mato Grosso do Sul; Brasil; Mangement.; Eficiência Reprodutiva; Manejo; Reprodução.; Nellore; Pantanal; Beef cattle; Brazil; Reproductive performance.; Reproduction. |
| Ano: 2001 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/325277 |
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| Registros recuperados: 672 | |
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