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	Provedor de dados PAB (15) R. Bras. Zootec. (10) Biological Sciences (9) Zoologia (4) Animal Sciences (4) Arq. Bras. Med. Vet. Zootec. (4) Anais da ABC (AABC) (2) BJB (2) Scientia Agricola (2) Agrociencia (1) Biocell (1) Biota Neotropica (1) ArchiMer (1) BABT (1) BJMBR (1) Ciência Rural (1) Genet. Mol. Biol. (1) Mais... Autor Martins,Maurício Laterça (5) Moraes,Flávio Ruas de (5) Boscolo,Wilson Rogério (4) Feiden,Aldi (4) Ribeiro,Ricardo Pereira (4) Signor,Arcangelo Augusto (4) Tavares-Dias,Marcos (4) Vargas,Lauro (4) Fujimoto,Rodrigo Yudi (3) Hayashi, Carmino (3) Portella,Maria Célia (3) BICUDO,ÁLVARO J.A. (2) Bittencourt,Fábio (2) CYRINO,JOSÉ E.P. (2) Castro,Marcello Pardi de (2) Faria-Soares, Anna Christina Esper (2) Fernandes, Carlos Eduardo Bento; UEM (2) Galdioli, Eliana Maria (2) Gomes,Patrícia Cristina (2) Hayashi, Carmino; UEM (2) Mais... Palavra-chave Piaractus mesopotamicus (60) Pacu (5) Colossoma macropomum (4) Fish (4) Ascorbic acid (3) Hematologia (3) Nutrição (3) RAPD (3) Alimentação (2) Anacanthorus penilabiatus (2) Cortisol (2) Desempenho (2) Fish nutrition (2) Larvicultura (2) Native fish (2) Peixes nativos (2) Variabilidade genética (2) Vitamin C (2) Vitamin E (2) 2.00.00.00-6 Ciências Biológicas Leporinus macrocephalus (1) Mais... Tipo do documento Info:eu-repo/semantics/article (50) Pesquisa de campo (1) Text (1) Ano 2020 (1) 2017 (1) 2016 (2) 2015 (2) 2014 (2) 2013 (7) 2012 (5) 2011 (3) 2010 (8) 2009 (4) 2008 (6) 2007 (4) 2006 (1) 2005 (1) 2004 (2) 2003 (2) 2001 (1) 2000 (4) 1999 (2) 1998 (1) Mais... País Brazil (57) Argentina (1) France (1) Mexico (1) Idioma Português (34) Inglês (25) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 60 Primeira ... 1 2 3 ... Última Failure of cortisol response in induced capture handling stress and carrageenin in Piaractus mesopotamicus Holmberg, 1887 (Osteichthyes: Characidae) Biological Sciences Martins, Maurício Laterça; UNESP; Moraes, Flávio Ruas de; UNESP; Moraes, Julieta Rodini Engrácia de; UNESP; Malheiros, Euclides Braga; UNESP. In this assay the effect of consecutive stress handling and carrageenin injection (500 &micro;g in 0.5 ml of saline solution) or 0.5 mL of saline on Piaractus mesopotamicus Holmberg, 1887 (Osteichthyes: Characidae) was evaluated. The fish were subjected to 30 s capture handling stress applied repeatedly at 60 min intervals over 6 h. Blood sampling was as following: time 0: basal blood sampling and first stress; time 1: injection with carrageenin or saline and sampling after 5 min; time 2: stress and sampling after 5 min; time 3: stress and sampling after 5 min; time 4: stress and sampling after 5 min; time 5: blood sampling after 90 min. Circulanting cortisol levels showed significant decrease in time 4 and 5 in both carageenin and saline injected... Palavras-chave: 2.00.00.00-6 Ciências Biológicas carragenina; Cortisol; Estresse; Glicose; Leucócitos; Piaractus mesopotamicus; Trombócitos 2.00.00.00-6 Ciências Biológicas. Ano: 2000 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2946 Farelo de canola em dietas para o pacu Piaractus mesopotamicus (Holmberg 1987): efeitos sobre o crescimento e a composição corporal Arq. Bras. Med. Vet. Zootec. Viegas,E.M.M.; Carneiro,D.J.; Urbinati,E.C.; Malheiros,E.B.. Avaliaram-se os efeitos da inclusão de farelo de canola em dietas de juvenis de pacu (Piaractus mesopotamicus) sobre parâmetros de crescimento e composição corporal. Um total de 192 alevinos (9 a 15g) foram estocados em 24 tanques de cimento, de 100l de capacidade, durante 103 dias. O farelo de canola foi utilizado em quatro proporções: zero; 9,5%; 19% e 38% da dieta, com ou sem farinha de peixe (12%/dieta), totalizando oito tratamentos. A presença de farinha de peixe não afetou os parâmetros de crescimento avaliados. A inclusão de 38% de farelo de canola na dieta diminuiu o ganho de peso dos peixes, valores médios de 28,74g a 50,70g, e piorou a conversão alimentar aparente, de 1,66 para 2,85. A taxa de eficiência protéica também foi menor nos peixes... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pacu; Piaractus mesopotamicus; Farelo de canola; Farinha de peixe; Fonte protéica. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352008000600029 Gastrointestinal transit of extruded or pelletized diets in pacu fed distinct inclusion levels of lipid and carbohydrate PAB Honorato,Claucia Aparecida; Almeida,Luciana Cristina de; Nunes,Cleujosí da Silva; Carrilho,Elma Neide Vasconcelos Martins; Moraes,Gilberto. The objective of this work was to evaluate the effect of pelletized or extruded diets, with different levels of carbohydrate and lipid, on the gastrointestinal transit time (GITT) and its modulation in pacu (Piaractus mesopotamicus). One hundred and eighty pacu juveniles were fed with eight isonitrogenous diets containing two carbohydrate levels (40 and 50%) and two lipid levels (4 and 8%). Four diets were pelletized and four were extruded. Carbohydrate and lipid experimental levels caused no changes to the bolus transit time. However, the bolus permanence time was related to diet processing. Fish fed pelletized diets exhibited the highest gastrointestinal transit time. Regression analysis of bolus behavior for pelletized and extruded diets with 4% lipid... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Carbohydrate; Lipid; Starch gelatinization; Viscosity.. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014001100829 Growth and hematology of juvenile pacu Piaractus mesopotamicus (Holmberg 1887) fed with increasing levels of vitamin E (DL-α-tocopheryl acetate) Anais da ABC (AABC) SADO,RICARDO Y.; BICUDO,ÁLVARO J.A.; CYRINO,JOSÉ E.P.. Intensive fish production systems are characterized by 100% artificial feeding, so any dietary imbalances or deficiencies may lead to diseases outbreaks and economic losses. This study was set out to determine the effects of increasing levels of dietary vitamin E on growth and hematology of juvenile pacu. Fishes were fed for 90 days, twice a day until apparent satiation with semi-purified diets containing 0.0; 25; 50; 150; 300 or 600 mg.kg−1 diet DL-α-tocopheryl acetate in a completely randomized design trial (n=4); biometrical and hematological data were collected and analyzed. Fishes fed with vit E diet (150 mg.kg−1) showed higher (p<0.05) weight gain and specific growth. Hematocrit, erythroblast number and total plasma protein were increased... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish nutrition; Hematology; Piaractus mesopotamicus; Vitamin E. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100385 Growth and hematology of pacu subjected to sustained swimming and fed different protein levels PAB Nunes,Cleujosí da Silva; Moraes,Gilberto; Fabrizzi,Fernando; Hackbarth,Araceli; Arbeláez-Rojas,Gustavo Alberto. The objective of this work was to evaluate the effect of sustained swimming and dietary protein levels on growth and hematological responses of juvenile pacu (Piaractus mesopotamicus). A completely randomized design was used in a 3x2 factorial arrangement, with three levels of dietary protein (24, 28, and 32% crude protein), two rearing conditions (sustained swimming or motionless water), and 15 replicates. Fish were subjected to sustained swimming at the velocity of two body lengths per second (2 BL s-1), for 45 days. The level of dietary protein and the swimming conditions affected the performance, growth, and hematological profile of pacu. Swimming conditions influenced nutritional factors, increasing daily weight gain, specific growth rate, number of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Erythropoiesis; Exercise; Growth rate; Weight gain. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000600010 Growth and intestinal morphology of juvenile pacu Piaractus mesopotamicus (Holmberg 1887) fed dietary prebiotics (mannanoligosaccharides - MOS) Anais da ABC (AABC) SADO,RICARDO Y.; BICUDO,ÁLVARO J.A.; CYRINO,JOSÉ E.P.. Intensification of aquaculture production systems exposes fish to numerous stressors, which may negatively affect their growth and limit profitability of aquaculture systems. This study determined effects of increasing levels of dietary mannanoligosaccharides on growth and intestine morphology of pacu. Fish (44.04 g) were randomly distributed into 32 tanks (500 L; 10 fishes per tank) and fed during 63 days with a commercial diet supplemented with 0.0; 0.2; 0.4; 0.6; 0.8; 1.0; 1.5 and 2.0% dietary mannanoligosaccharides. Growth parameters did not differ (P>0.05) between fish fed control diet and mannanoligosaccharide supplemented diets. Intestinal villi perimeter was performed in fish fed control diet, 0.4 and 1.5% dietary mannanoligosaccharides and also... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish nutrition; Histology; Piaractus mesopotamicus; Prebiotics. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301517 Growth, body composition and hematology of juvenile pacu (Piaractus mesopotamicus) fed increasing levels of ractopamine Arq. Bras. Med. Vet. Zootec. Bicudo,A.J.A.; Sado,R.Y.; Cyrino,J.E.P.. The effects of four levels of dietary ractopamine (RAC) on growth, body composition and hematology of pacu, Piaractus mesopotamicus juveniles (103.6±3.3g) were studied. Fish were housed into 12 circular tanks of 1 m3 - 15 fish per tank - and fed for 60 days with practical diets supplemented with 0; 10; 20 or 40mg RAC per kg of diet, in a totally randomized design trial (n=3). Fish fed diets containing up to 40mg RAC/kg diet for 60 days did not have improved growth or body composition parameters. There were no significant differences in hematocrit, hemoglobin and mean corpuscular hemoglobin. Plasma glucose and triglycerides were significantly smaller in fish fed with RAC; however no significant differences between RAC levels were detected. The inclusion of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish; Feed additive; Repartitioning agents; Piaractus mesopotamicus; Nutrition; Hematological parameters. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000500034 Growth, survival and bone alterations in Piaractus mesopotamicus larvae under different rearing protocols Ciência Rural Hernández,David Roque; Agüero,Carlos Hernán; Santinón,Juan José; González,Alfredo Oscar; Sánchez,Sebastián. The pacu (Piaractus mesopotamicus) is a neotropical freshwater fish. It is one of the most important species farmed in areas of the Parana and Paraguay Rivers basins. The effects of different rearing protocols on growth, survival and incidence of skeletal malformations in pacu larvae were analyzed. A total of six experimental treatments were considered, consisting of: a semi-intensive larviculture (LS) in ponds; intensive larviculture (LIn) in laboratory (both LS and LIn until 60 days of life); and mixed larviculture, with 20 days of semi-intensive larviculture into cages in ponds after 14 (L1), 21 (L2), 33 (L3) or 40 (L4) days of laboratory larviculture. At the end of the experimental period, LSlarvae showed higher growth rate, with average weight values... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Larviculture; Retention; Bone malformations. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000901667 Hematologia de teleósteos brasileiros com infecção parasitária. I. Variáveis do Leporinus macrocephalus Garavelo e Britski, 1988 (Anostomidae) e Piaractus mesopotamicus Holmberg, 1887 (Characidae) Biological Sciences Tavares-Dias, Marcos; Schalch, Sérgio Henrique Canello; Martins, Maurício Laterça; Silva, Érico Demari; Moraes, Flávio Ruas; Perecin, Dilermando. Espécimes de Leporinus macrocephalus (piauçu) e de Piaractus mesopotamicus (pacu) foram colhidos em piscicultura do município de Franca (SP) para avaliação dos efeitos da infecção parasitária sobre a taxa de hemoglobina e de hematócrito, a concentração de hemoglobina corpuscular média (CHCM), o fator relativo de condição (Kn) e a distribuição percentual de células sangüíneas de defesa orgânica (leucócitos e trombócitos). Ambas as espécies apresentavam-se parasitadas por monogenea ou por monogenea e outros parasitas: monogenea e Trichodina sp; monogenea e Lernaea cyprinacea; monogenea e Piscinoodinium pillulare; monogenea e Ichthyophthirius multifiliis; monogenea, I. multifiliis e Trichodina sp. Os resultados demonstraram que os parâmetros estudados em L.... Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.00.00.00-6 Ciências Biológicas Leporinus macrocephalus; Piaractus mesopotamicus; Parasitas; Hematologia 2.00.00.00-6 Ciências Biológicas. Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4440 Impact of Brazilian fish species at early developmental stages on plankton communities and water chemical parameters Biological Sciences Soares, Claudemir Martins; Hayashi, Carmino; Faria-Soares, Anna Christina Esper; Galdioli, Eliana Maria.  Effect of larvae of Astyanax altiparanae (AA), Piaractus mesopotamicus (PM), Leporinus obtusidens (LO) and Prochilodus lineatus (PL) on plankton communities and water quality were evaluated. Twenty 500 L tanks were used into a completely randomized design with five treatments and four replications, containing 350 individuals of each species per tank. One treatment control had no larvae (CT). Every six days, were collected periphyton and water to determine the concentrations of chlorophyll and total phosphorus. Plankton samples (20 mm mesh net) were taken every three days. Fish affected plankton communities, which showed lower densities of total zooplankton in AA tanks than in LO tanks. Increased density of rotifers and reduced density of copepods were... Tipo: Info:eu-repo/semantics/article Palavras-chave: 2.05.00.00-9 Astyanax altiparanae; Fish larvae; Plankton interaction; Leporinus obtusidens; Piaractus mesopotamicus; Prochilodus lineatus 2.05.03.00-8. Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/32063 Influence of aquatic plants on the predation of Piaractus mesopotamicus larvae by Pantala flavescens - doi: 10.4025/actascibiolsci.v32i2.5167 Biological Sciences Lacerda, Carlos Henrique Figueiredo; Hayashi, Carmino; Soares, Claudemir Martins; UEM; Fernandes, Carlos Eduardo Bento; UEM. The experiment aimed to study the influence of the aquatic plants E. najas, P. stratiotes and S. auriculata on the predation of P. mesopotamicus larvae by P. flavescens. One hundred and twenty larvae of P. mesopotamicus and 24 larvae of P. flavescens were placed in 24 aquariums with capacity of 12 L, with one Odonate per aquarium. Treatments were different regarding the species of aquatic plants E. najas, S. auriculata and P. stratiotes, with one control treatment without aquatic plants. One aquarium (12 L) containing one Odonate and 30 P. mesopotamicus larvae was considered one experimental unit. After 18 hours, the Odonates were removed from the aquariums and fish larvae left (alive) were counted in each experimental unit. The survival rate of P.... Palavras-chave: Larvae; Piaractus mesopotamicus; Pantala flavescens; Predation; Aquatic plants Larvae; Piaractus mesopotamicus; Pantala flavescens; Predation; Aquatic plants. Ano: 2010 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5167 Influência de diferentes níveis de vitamina C na ração sobre parâmetros hematológicos de alevinos de Piaractus mesopotamicus Holmberg (Osteichthyes, Characidae) Zoologia Martins,Maurício Laterça; Castajjnolli,Newton; Zuim,Sônia Maria Fontes; Urbinati,Elisabeth Criscuolo. Haematological changes in ascorbic acid deficient fishes, observed by some authors, awoked the interest in the haematological response of pacu, Piaractus mesopotamicus. The present work studied the influence of different levels of ascorbic acid (vitamin C) in the ration on the haematological parameters of pacu. Fishes at the beginning of the experiment, presented average body weight 8.64±1.62g and 6.15±0.33cm standard length, were fed with diets containing 0. 50, 100 and 200mg ascorbic acid/kg dry ration. The present work was developed for a period of 24 weeks at the Fish Nutrition Laboratory of Aquaculture Center of Universidade Estadual Paulista (Unesp), Jaboticabal (São Paulo). The fishes were distributed by the completely randomized design in 20... Tipo: Info:eu-repo/semantics/article Palavras-chave: Osteichthyes; Characidae; Piaractus mesopotamicus; Haematology; Vitamin C; Fish. Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000300016 Ingestão de ração e comportamento de larvas de pacu em resposta a estímulos químicos e visuais R. Bras. Zootec. Tesser,Marcelo Borges; Portella,Maria Célia. Este estudo foi realizado com o objetivo de comparar a influência dos estímulos visual e/ou químico de náuplios de Artemia e de dieta microencapsulada sobre a taxa de ingestão da dieta microencapusulada por larvas de pacu Piaractus mesopotamicus. Utilizou-se um esquema fatorial 7 x 4 (estímulos e idades) com duas repetições. Verificou-se efeito da idade das larvas e dos estímulos, mas não houve efeito para a interação idade <FONT FACE=Symbol>´</FONT> estímulos. O estímulo químico da Artemia e ambos os estímulos da Artemia resultaram em maior taxa de ingestão de dieta inerte. Resultado intermediário foi obtido com o estímulo visual da dieta microencapsulada. O estímulo químico, em comparação ao estímulo visual da Artemia, resultou em maiores... Tipo: Info:eu-repo/semantics/article Palavras-chave: Artemia; Comportamento; Estímulo alimentar; Larva; Pacu; Piaractus mesopotamicus. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982006000700002 Interrelationships between morphometric variables and rounded fish body yields evaluated by path analysis R. Bras. Zootec. Reis Neto,Rafael Vilhena; Freitas,Rilke Tadeu Fonseca de; Serafini,Moacyr Antonio; Costa,Adriano Carvalho; Freato,Thiago Archangelo; Rosa,Priscila Vieira; Allaman,Ivan Bezerra. The objective of this study was to verify which morphometric measures and ratios are more directly associated with the weight and body yields of rounded fish. A total of 225 specimens of rounded fish (59 pacus, 61 tambaquis, 52 tambacus and 53 paquis) with average weight of 972.43 g (±115.52 g) were sampled, stunned, slaughtered, weighed, measured, and processed for morphometric and processing yield analysis. The morphometric measures taken were: standard length (CP); head length (CC); head height (AC); body height (A1); and body width (L1). For completeness, the following morphometric ratios were calculated: CC/CP, AC/CP, A1/CP, L1/CP, CC/A1, AC/A1, L1/A1, CC/AC and L1/CC. The yields of carcass, filet, rib and filet with rib were estimated after... Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal breeding; Carcass; Colossoma macropomum; Direct effect; Piaractus mesopotamicus. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700004 Levels of yeast and its by-products on pacu juveniles feeding R. Bras. Zootec. Watanabe,André Luiz; Viegas,Elisabete Maria Macedo; Gonçalves,Lígia Uribe. This study was conducted to evaluate the inclusion of two levels (2.5 e 5.0%) of dried yeast (Saccharomyces cerevisiae) and its by-products, disrupted yeast cells and yeast cell wall in diets for juveniles of pacu (Piaractus mesopotamicus). Production performance, body and plasmatic composition indexes were evaluated. Seven isoproteic (26% digestible protein) and isoenergetic (3.100 kcal digestible energy) diets were formulated containing increased levels of each ingredient. The diets were supplied for 86 days, "ad libitum". Yeast and by-products increase feed efficiency and protein use, when compared to the control diet. Carcass composition and plasmatic (glucose, cortisol, uric acid, urea and plasmatic protein) levels are not affected by the test... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Pre-biotic; Production performance; Saccharomyces cerevisiae; Yeast by-products. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010000300001 Métodos de coleta de fezes e determinação dos coeficientes de digestibilidade da fração protéica e da energia de alimentos para o pacu, Piaractus mesopotamicus (Holmberg, 1887) R. Bras. Zootec. Abimorad,Eduardo Gianini; Carneiro,Dalton José. Para melhorar a alimentação do pacu (Piaracatus mesopotamicus), é necessário conhecer o nível de aproveitamento dos ingredientes utilizados em suas dietas. Neste trabalho, inicialmente, foram analisados quatro métodos de coleta de fezes, em função da precisão e da versatilidade (dissecação, extrusão, Guelph e Guelph modificado), e o tempo entre as coletas de fezes nos sistemas de Guelph, por intermédio do coeficiente de digestibilidade da proteína bruta de uma dieta-referência para o pacu. Não houve diferença entre os métodos de coleta de fezes; já os intervalos de tempo das coletas apresentaram diferenças, podendo interferir nos resultados de digestibilidade da proteína. Em uma segunda etapa, para determinação dos coeficientes de digestibilidade da... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pacu; Piaractus mesopotamicus; Métodos de coleta de fezes; Digestibilidade; Proteína; Energia. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982004000500001 Microsatellite analysis of pacu broodstocks used in the stocking program of Paranapanema River, Brazil Scientia Agricola Povh,Jayme Aparecido; Ribeiro,Ricardo Pereira; Lopera-Barrero,Nelson Mauricio; Jacometo,Carolina Bespalhok; Vargas,Lauro; Gomes,Patrícia Cristina; Lopes,Taís da Silva. Monitoring the genetic diversity has fundamental importance for fish stocking programs. This experiment aims to evaluate the genetic diversity in two hatchery stations (A and B) with pacu Piaractus mesopotamicus (Holmberg, 1887) in Andirá, state of Paraná, Brazil used in stocking programs of Paranapanema River. Six microsatellite loci were amplified using DNA extracted from 60 fin-clipping samples. The broodstock B had the average number of alleles and the mean heterozygosity (alleles: 3.7 and H O: 0.628) higher than the broodstock A (alleles: 3.5 and H O: 0.600). Alleles with low frequency levels were observed in the both broodstocks. The positive coefficients of endogamy in the locus Pme2 (broodstock A: F IS = 0.30 and broodstock B: F IS = 0.20), Pme5... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Genetic variability; Hatchery stations; Molecular markers. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300006 Molecular cloning and sequence analysis of growth hormone cDNA of Neotropical freshwater fish Pacu (Piaractus mesopotamicus) Genet. Mol. Biol. Pinheiro,Janeth Silva; Wolff,José Luiz Caldas; Araújo,Ronaldo de Carvalho; Hilsdorf,Alexandre Wagner Silva. RT-PCR was used for amplifying Piaractus mesopotamicus growth hormone (GH) cDNA obtained from mRNA extracted from pituitary cells. The amplified fragment was cloned and the complete cDNA sequence was determined. The cloned cDNA encompassed a sequence of 543 nucleotides that encoded a polypeptide of 178 amino acids corresponding to mature P. mesopotamicus GH. Comparison with other GH sequences showed a gap of 10 amino acids localized in the N terminus of the putative polypeptide of P. mesopotamicus. This same gap was also observed in other members of the family. Neighbor-joining tree analysis with GH sequences from fishes belonging to different taxonomic groups placed the P. mesopotamicus GH within the Otophysi group. To our knowledge, this is the first GH... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Growth hormone; CDNA cloning; Sequencing. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200037 Monitoramento da variabilidade genética de pacu, Piaractus mesopotamicus, do programa de aumento de estoque do rio Paranapanema Arq. Bras. Med. Vet. Zootec. Povh,J.A.; Ribeiro,R.P.; Lopera-Barrero,N.M.; Gomes,P.C.; Blanck,D.V.; Vargas,L.; Jacometo,C.B.; Lopes,T.S.. Avaliou-se a variabilidade genética dos estoques de reprodutores e dos peixes jovens de Piaractus mesopotamicus de três pisciculturas do estado do Paraná, utilizadas no programa de aumento de estoque de peixes no rio Paranapanema. Foi utilizado o marcador RAPD para avaliar as amostras do estoque de reprodutores e dos peixes jovens das pisciculturas de Palotina, Cambará e Andirá. A porcentagem de fragmentos polimórficos e o índice de diversidade genética de Shannon dos estoques de reprodutores variaram de 75,0% a 71,4% e de 0,434 a 0,376, respectivamente. Os peixes jovens das pisciculturas apresentaram valores mais elevados para ambos os parâmetros, com exceção da piscicultura de Palotina, na qual o índice de diversidade genética de Shannon foi semelhante.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Peixes jovens; Estoque de reprodutores; RAPD; Variabilidade genética. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000500023 Morphological study of the spermatogenesis in the teleost Piaractus mesopotamicus Biocell da Cruz-Landim,Carminda; Camargo Abdalla,Fábio; da Cruz-Höfling,Maria Alice. The spermatogenesis of Piaractus mesopotamicus was investigated under light and transmission electron microscopy. The specimens were captured from their natural environment (Rio Miranda and Rio Aquidauana, Pantanal Matogrossense, Brazil) during April and September. The results were compared with the spermatogenic data of specimens under captivity condition. In both conditions, P. mesopotamicus presented the typical spermatogenesis pattern of the teleost fishes, showing no significative differences. The spermatozoon was classified as type I, which has a globular head without acrosome, a short middle piece and a long tail constituted only by the flagellum. This type of spermatozoon is considered the basic type in fishes. Tipo: Info:eu-repo/semantics/article Palavras-chave: Piaractus mesopotamicus; Spermatogenesis; Spermatogonia; Spermiogenesis; Teleostei. Ano: 2003 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452003000300003 Registros recuperados: 60 Primeira ... 1 2 3 ... Última

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