Consulta: subjectFacets:"Fertility"
Registros recuperados: 126
Data/hora: 17/06/2024 15:17:56

Distribución altitudinal, tratamiento pregerminativo e influencia de Lupinus spp (Fabaceae: Papilonoidear) en la fertilidad de suelos forestales
Provedor de dados: 32
Autores: Aldrete Chávez, Ángel.
En la ladera oriental de la Sierra Nevada, México, en varios ecosistemas forestales, áreas de  bosque incendiadas, pastizales y tierras agrícolas se encuentra la planta de Lupinus. En México  se han reportado 110 especies en altitudes que varían de 0 a 4000 msnm. En el valle de México  22 especies y dos variedades han sido identificadas. El Lupino es miembro del género Lupinus y  pertenece a la familia (Fabaceae). El género tiene entre 200 y 600 especies con sus centros de  Biodiversidad en Europa y América. La mayoría de las especies son plantas perennes herbáceas  de 0.3-1.5 m de alto, algunas son anuales y existen pocos arbustos de hasta 3 m de altura. El  lupino fija nitrógeno atmosférico y hace disponibles fósforo potasio y otros nutrientes utilizando...
Tipo: Tesis
Palavras-chave: Distribución; Lupinus; Germinación de semillas; Fertilidad; Distribution; Lupine; Seedling germination; Fertility.
Ano: 2008
URL: http://hdl.handle.net/10521/1423

Selenio y vitamina E en la fertilidad de ovejas pelibuey sincronizadas con progesterona
Provedor de dados: 32
Autores: Fraire Cordero, Silvia.
El selenio y la vitamina E tienen funciones importantes para mantener la integridad de la membrana celular, razón por la cual se les relaciona con la reproducción. La finalidad fue evaluar el efecto de la administración subcutánea de Selenio y Vitamina E (Se-VE), de gonadotropina corionica equina (eCG) y una estrategia de alimentación (Alimentación Dirigida; AD) en la fertilidad de ovejas Pelibuey. La aplicación de Se-VE se realizó dos días antes del retiro de la progesterona y se observó la incidencia, inicio y distribución del estro a través del tiempo, tasa ovulatoria, porcentajes de retorno a estros, parición y fertilidad, así como la fecundidad y prolificidad. Se utilizaron 96 ovejas  las cuales fueron agrupadas y asignadas al azar a uno de ocho...
Palavras-chave: Selenio; Vitamina E; Fertilidad; Alimentación dirigida; Ovejas Pelibuey; Selenium; Vitamin E; Fertility; Directed feeding; Pelibuey ewes; Maestría; Ganadería.
Ano: 2010
URL: http://hdl.handle.net/10521/99

Selenio y vitamina E en la fertilidad de ovejas pelibuey sincronizadas con progesterona
Provedor de dados: 32
Autores: Fraire Cordero, Silvia.
El selenio y la vitamina E tienen funciones importantes para mantener la integridad de la membrana celular, razón por la cual se les relaciona con la reproducción. La finalidad fue evaluar el efecto de la administración subcutánea de Selenio y Vitamina E (Se-VE), de gonadotropina corionica equina (eCG) y una estrategia de alimentación (Alimentación Dirigida; AD) en la fertilidad de ovejas Pelibuey. La aplicación de Se-VE se realizó dos días antes del retiro de la progesterona y se observó la incidencia, inicio y distribución del estro a través del tiempo, tasa ovulatoria, porcentajes de retorno a estros, parición y fertilidad, así como la fecundidad y prolificidad. Se utilizaron 96 ovejas  las cuales fueron agrupadas y asignadas al azar a uno de ocho...
Palavras-chave: Selenio; Vitamina E; Fertilidad; Alimentación dirigida; Ovejas Pelibuey; Selenium; Vitamin E; Fertility; Directed feeding; Pelibuey ewes; Maestría; Ganadería.
Ano: 2010
URL: http://hdl.handle.net/10521/99

The effect of reciprocal connections between demographic decision making and land use on decadal dynamics of population and land-use change
Provedor de dados: 7
Autores: Zvoleff, Alexander; San Diego State University, Department of Geography; azvoleff@conservation.org; An, Li; San Diego State University, Department of Geography; lan@mail.sdsu.edu.
Tipo: Peer-Reviewed Reports
Palavras-chave: Coupled human-natural system; Environment; Feedback; Fertility; Land use; Marriage; Population.
Ano: 2014

SOIL ATTRIBUTES AND WHEAT PERFORMANCE IN A GEOREFERENCED SEED PRODUCTION FIELD
Provedor de dados: 70
Autores: Gadotti,Gizele I.; Corrêa,Marciabela F.; Navroski,Renan; Nadal,Ariele P.; Schuch,Luis O. B.
ABSTRACT The aim of this research was to study the linear correlations and spatial distribution between soil attributes and productivity and physiological quality of wheat seeds. Soil samples were collected at georeferenced points in an area of 41 ha with a rectangular grid of 100 × 100 m to determine soil fertility. Grain productivity, number of ears m-2, protein content, and physiological seed quality were assessed. The results were submitted to Pearson's correlation analysis, descriptive statistics, and geostatistics. Phosphorus content presented a high spatial variability, with a coefficient of variation of 97.79%. Protein content, number of ears, and SMP index presented low values of coefficient of variation, indicating their low spatial variability....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Precision agriculture; Fertility; Seed quality; Triticum aestivum L.; Spatial variability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400624

The TP53 fertility network
Provedor de dados: 74
Autores: Paskulin,Diego d'Avila; Paixão-Côrtes,Vanessa Rodrigues; Hainaut,Pierre; Bortolini,Maria Cátira; Ashton-Prolla,Patricia.
The TP53 gene, first described in 1979, was identified as a tumor suppressor gene in 1989, when it became clear that its product, the p53 nuclear phosphoprotein, was frequently inactivated in many different forms of cancers. Nicknamed "guardian of the genome", TP53 occupies a central node in stress response networks. The p53 protein has a key role as transcription factor in limiting oncogenesis through several growth suppressive functions, such as initiating apoptosis, senescence, or cell cycle arrest. The p53 protein is directly inactivated in about 50% of all tumors as a result of somatic gene mutations or deletions, and over 80% of tumors demonstrate dysfunctional p53 signaling. Beyond the undeniable importance of p53 as a tumor suppressor, an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TP53; Fertility; P53 network.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600008

Somaclonal variation in Asparagus officinalis plants regenerated by organogenesis from long-term callus cultures
Provedor de dados: 74
Autores: Pontaroli,Ana Clara; Camadro,Elsa Lucila.
Somaclonal variation in plants regenerated by organogenesis from long-term cultured calluses of two diploid staminate genotypes of Asparagus officinalis cv. Argenteuil was characterized by plant phenotype, ploidy, meiotic behavior, pollen viability, fruit and seed set, and AFLP profiles. Phenotypic deviations from the donors were detected in foliage color, flower size, and cladode and flower morphology. Ploidy changes were observed in 37.8% of the 37 regenerants studied. Meiotic alterations in 12 out of 21 regenerants included laggards, dicentric bridges, micronuclei, restitution nuclei and polyads. Of the 408 AFLP markers screened in 43 regenerants and the donors, 2.94% showed polymorphism. High pollen viability was observed in the 22 regenerants...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AFLP; Fertility; Plant morphology; Meiotic behavior; Ploidy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300015

Amostragem de solo para análise de fertilidade.
Provedor de dados: 14
Autores: FARIA, C. M. B. de.
Mostra como coletar amostra de solo para determinar fertilidade.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Amostra; Fertility; Sample.; Solo; Fertilidade.; Soil.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131991

Avaliação da fertilidade do solo do Projeto de Irrigação de Bebedouro em Petrolina.
Provedor de dados: 14
Autores: FARIA, C. M. B. de; CABRAL, F. J. G.; FERRAZ, M. L.; CHOUDHURY, E. N.; MARTINS, C. E.
Atraves da analise de solo, foi realizada uma avaliacao da fertilidade do solo em uma area de 1.100 ha do perimetro irrigado do Projeto de Irrigacao de Bebedouro, apos 13 anos de exploracao. Os dados dos elementos obtidos, foram comparados com os do solo virgem e classificados em niveis baixo, medio e alto. Quando comparado o solo em estudo com o solo virgem, houve aumento nos teores de potassio, fosforo, calcio, magnesio e da condutividade eletrica, e um decrescimo do teor de sodio, e o valor do pH praticamente nao se alterou. No que se refere a classificacao dos niveis, constatou-se que a maior parte da area do Projeto apresentou niveis altos de potassio, niveis medios de fosforo, calcio, magnesio e pH e niveis baixos de aluminio e da Capacidade de Troca...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Classificação; Brasil; Pernambuco; Petrolina; Fertility; Project.; Solo; Fertilidade; Irrigação.; Soil; Classification; Irrigation.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131997

Modificação de características químicas em solos de Mato Grosso do Sul incubados com escórias de siderurgia.
Provedor de dados: 14
Autores: LIMA FILHO, O. F. de.
As escórias de aciaria (LD) e de alto-forno (AF), coprodutos da indústria siderúrgica, podem ser utilizadas como corretivos do solo e fontes de silício. Com o objetivo de avaliar o efeito de doses crescentes de duas escórias (LD e AF), sobre as características químicas de três solos de MS, foi realizado um ensaio de incubação com e sem calagem prévia. Foram utilizadas amostras da camada de 0 ? 20 cm de três solos de Mato Grosso do Sul (MS) - Latossolo Vermelho distroférrico álico (argiloso), LVdfa; Latossolo Vermelho distrófico (franco arenoso), LVd; Argissolo Vermelho distrófico (arenoso), PVd. A primeira incubação foi realizada com a ausência ou adição de CaCO + 3 MgCO p.a, neste último caso visando aumentar a saturação por bases para 3 60%. Na segunda...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Silicato; Silicate; Fertility; Nutrient.; Fertilidade; Fósforo; Nutriente; Potássio; Silício.; Potassium; Phosphorus; Silicon.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/933979

Avaliacao da eficiencia de fosfatos de rocha parcialmente acidulados e tratados termicamente.
Provedor de dados: 14
Autores: PEREIRA, J. R.; FARIA, C. M. B. de.
Avaliacao da eficiencia e efeito residual de diversos fosfatos em Latossolo Vermelho Amarelo do submedio Sao Francisco. Constituiu-se de dois experimentos, o primeiro foi avaliada a eficiencia dos seguintes fosfatos na produtividade do milho var. Centralmex: catalao moido, catalao 350, catalao 600, catalao tratado termicamente, patos moidos; patos 250, patos 600, patos tratado termicamente, araxa moido e araxa tratado termicamente. Foi avaliado, tambem, o efeito residual desses fosfatos atraves de dois ciclos da cultura do milho. O segundo expeimento foi realizado com as mesmas caracteristicas do anterior. Como fontes de fosforo foram usados os seguintes produtos: termofosfato goisfertil; fosfato RNC, dapinho, fosfatos parcialmente acidulados fosforico.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Variety; Soils; Fertility; Phosphate; Fertilidade; Fosfato; Milho; Variedade; Solo; Zea Mays; Corn.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132825

Análise de fertilidade de gemas em videira.
Provedor de dados: 14
Autores: LEAO, P. C. de S.; MASHIMA, C. H.
Introdução; Amostragem no campo; Análise da gema em microscópio estereoscópio.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Fertility; Analysis; Grape.; Uva; Análise; Fertilidade; Gema; Vitis Vinifera.; Buds; Grapes.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134143

Caracterizacao dos solos e sua associacao com as fitofisionomias em uma bacia hidrografica: aspectos pedologicos e quimicos.
Provedor de dados: 14
Autores: REATTO, A.; SPERA, S. T.; CORREIA, J. R.; MILHOMEM, A. S.
A origem das formacoes savanicas e campestres do cerrado e muito discutida e alguns autores procuram explica-la em tres teorias: 1) Teoria climatica, associada com limitacao sazonal de agua durante periodos relativamente longos de estiagem; 2) Teoria biotica, resultante da acao antropica, principalmente pelo uso frequente do fogo; 3) Teoria pedologica, em que a vegetacao seria dependente do grau de fertilidade do solo. O objetivo deste trabalho foi caracterizar os solos de uma bacia hidrografica e associa-lo as principais fitofisionomias correspondentes, em uma abordagem pedologica e quimica. O local selecionado para este estudo foi a Bacia do rio Jardim, Distrito Federal. As diferentes classes de solos que ocorrem nessa bacia foram determinadas pelo...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Chemicophysical properties; Fertility; Savanna.; Bacia Hidrográfica; Cerrado; Fertilidade; Propriedade Físico-Química; Reconhecimento do Solo; Solo; Vegetação.; Soil; Soil surveys; Watersheds.; Vegetation.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566900

Bibliografia de solos.
Provedor de dados: 14
Autores: NASSAR, N. L.
Conceituação geral dos solos. Física do solo. Química do solo. Biologia do solo. Fertilidade e fertilizantes do solo. Levantamento do solo. Conservação do solo. Solos de floresta. Mineralogia do solo. Localidades geográficas. Culturas. Economica. Métodos analíticos. Aerofotogrametria, fotointerpretação e cartografia. Instrumentos e equipamentos.
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Cultivo; Biology; Fertility; Survey; Conservation; Plant; Cultivation; Analysis.; Análise; Biologia; Conservação; Fertilidade; Levantamento; Planta; Química; Solo.; Chemistry; Soil.
Ano: 1974
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/373265

Limitações de fertilidade do solo na recuperação de pastagem degradada de capim colonião (Panicum maximum Jacq.) em Paragominas, na Amazônia Oriental.
Provedor de dados: 14
Autores: DIAS FILHO, M. B.; SERRÃO, E. A. S.
bitstream/item/31964/1/CPATU-BP87.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pastagem degradada; Paragominas; Pará; Brasil; Leguminous; Fertility; Production; Degraded pasture; Dry matter; Fertilization.; Adubação; Calagem; Capim Colonião; Fertilidade; Enxofre; Fósforo; Matéria Seca; Leguminosa; Nitrogênio; Panicum Maximum; Produção; Solo.; Amazonia; Liming; Phosphorus; Nitrogen; Soil; Sulfur.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383651

Recomendacoes tecnicas para o cultivo do arroz: area do Cerrado Zonas 10, 16, 19, 20, 58, 59, 60, 61 e 91.
Provedor de dados: 14
Autores: BRASIL. Ministerio da Agricultura e Reforma Agraria.
O arroz e a regiao; Manejo e conservacao de solos; Recomendacoes de cultivares e qualidade das sementes; Praticas culturais; Colheita; Secagem e armazenamento.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Armazenagem; Planta daninha; Controle; Brasil; Mato Grosso do Sul; Minas Gerais; Goias; Tocantins; Maranhao; Piaui; Distrito Federal; Management; Conservation; Recommendation; Variety; Quality; Seed; Cultural practice; Harvest; Grain; Fertility; Weed; Control; Pest; Disease; Adubação; Arroz; Calagem; Cerrado; Doença; Grão; Npk; Praga; Brazil; Drying; Liming; Rice; Savannas; Soil; Storage.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/445248

Fisiologia sexual do macho caprino.
Provedor de dados: 14
Autores: NUNES, J. F.
Producao dos espermatozoides e puberdade; Caracteristicas do esperma caprino; Fatores de variacao da producao espermatica; Fatores climaticos; Fatores alimentares; Fatores estacionais; Funcao fisiologica do plasma seminal e interacao com os espermatozoides incubados in vitro.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Puberdade; Fertility; Sexual behaviour.; Caprino; Comportamento sexual; Fertilidade; Espermatogênese; Maturidade sexual; Goats; Spermatogenesis; Sexual maturity.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514767

Efeito de retardadores de crescimento sobre o desenvolvimento das plantas e a fertilidade das gemas de videira da cultivar Festival.:
Provedor de dados: 14
Autores: ALBUQUERQUE, T. C. S. de.
bitstream/item/133213/1/ID-9018.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Videira; Variedade Festival; Budding; Fertility; Variety.; Uva; Fertilidade; Gema; Regulador de Crescimento.; Grapes; Plant growth substances.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134400

Mineralogia de argilas em cambissolos do Sudoeste da Amazônia brasileira.
Provedor de dados: 14
Autores: MOLLER, M. R. F.; KITAGAWA, Y.
bitstream/item/40418/1/Boletim-Pesquisa-34-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Mineral caulinitico; Acre; Tarauaca; Brasil; Kaolinitic mineral; Argil; Fertility; Cambisol.; Argila; Cambissolo; Fertilidade; Solo.; Amazonia; Soil.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381819

Avaliacao da fertilidade do solo.
Provedor de dados: 14
Autores: SILVA, D. J.; LEITE, J. P.; SILVA, M. C. L. da.
Metodos de avaliacao da fertilidade do solo; Analise do solo; Avaliacao nutricional da plantas.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Fertility; Analysis; Análise; Fertilidade; Solo; Soil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133293

Crescimento de mudas de Didymopanax morototoni (Aublet.) Decne (morototó) em viveiro em diferentes misturas de solo.
Provedor de dados: 14
Autores: MARQUES, L. C. T.; YARED, J. A. G.
bitstream/item/40427/1/Boletim-Pesquisa-57-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Substrato; Belterra; Santarem; Pará; Brasil; Substatum; Fertility; Seedling; Production.; Didymopanax Morototoni; Fertilidade; Muda; Melhoramento; Morototó; Reflorestamento.; Produção; Amazonia; Reforestation.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383798

Dinamica de nutrientes em solos arenosos no Pantanal Mato-Grossense.
Provedor de dados: 14
Autores: CUNHA, N. G. da.
Nos solos arenosos das sub-regioes da Nhecolandia e dos Paiaguas, no Pantanal Mato-Grossense, tem sido desenvolvidas pesquisas que objetivam determinar as limitacoes existentes ao estabelecimento e crescimento de forrageiras. Neste aspecto sao revisados os resultados dos experimentos realizados referentes a estabilidade dos nutrientes em cordilheira, causas da variacao estacional da producao das forrageiras, variacao da umidade nos solos de cordilheira e caronal, niveis e limitacoes de nutrientes no meio, uso da calagem nos solos mais pobres, produrando-se discutir as informacoes basicas obtidas e delas avaliar o conjunto de fatores que interfere na producao de forrageiras. A analise dos resultados indica que o sistema solo-agua-planta em seu dinamismo...
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Forrageira; Fertility; Nutrient; Production.; Absorção; Água; Fertilidade; Nutriente; Produção; Solo Arenoso.; Solo; Brazil; Pantanal; Absorption; Forage; Soil; Sandy soils; Water.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787717

Fertilidade do solo sob cobertura de floresta primária e de cultivos de dendê e de seringueira.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; TEIXEIRA, L. B.; BASTOS, J. B.
bitstream/item/59311/1/CPATU-ComTec72.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Oil palm; Rubber tree; Fertility; Fertilizer; Dry matter; Production.; Adubação; Dendê; Elaeis Guineensis; Fertilidade; Hevea Brasiliensis; Matéria Seca; Produção; Seringueira; Solo.; Soil.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380524

Estacionalidade na atividade sexual e qualidade do sêmen nos ovinos deslanados das raças Santa Inês e Somalis brasileira.
Provedor de dados: 14
Autores: SILVA, A. E. D. F.; NUNES, J. F.
Resumo: Em dez ovinos deslanados das racas Santa Ines e Somalis brasileira, sendo cinco de cada, foi coletado e ejaculado espermatico, atraves da vagina artificial, durante um ano. O objetivo foi avaliar a atividade sexual do macho ovino, nas condicoes do Nordeste brasileiro, no periodo seco (agosto a dezembro de 1983) e chuvoso (janeiro a maio de 1984) e as diferencas entre racas. Na avaliacao do esperma houve uma diferenca (P&lt;0,001) entre racas, a Santa Ines mostrando maior volume e concentracao do que a Somalis brasileira. Nao se obtiveram diferencas quanto a porcentagem de espermatozoides vivos e motilidade progressiva. Na epoca seca, o volume e a concentracao foram menores que na epoca chuvosa (P&lt;0,001). Porem a porcentagem de espermatozoides...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Raça Santa Inês; Raça Somalis brasileira; Atividade sexual; Macho; Sexual activity; Fertility; Male animals.; Ovino; Reprodução animal; Fertilidade; Sêmen; Espermatozóide; Sheep; Spermatozoa; Males.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514257

Metodos de avaliacao da fertilidade do solo.
Provedor de dados: 14
Autores: MIRANDA, L. N. de.
bitstream/item/98807/1/cirtec-10.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Methods; Evaluation; Avaliação; Fertility; Fertilização; Soil testing.; Análise; Análise do Solo; Cerrado; Fertilidade do Solo; Método; Solo.; Fertilizers; Soil fertility; Testing.; Soil.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547925

Productivity in tropical upwelling areas considered by a new method of analysis and determination.
Provedor de dados: 5
Autores: Minas, H; Minas, M; Packard, T.
When in frontal zones of upwelling areas, a two-component mixing of nutrient rich upwelled water and oligotrophic offshore waters occurs, the amounts of nutrient consumed (- Delta N) and oxygen produced (+ Delta O2) can be evaluated by a detailed analysis of diagrams, in which salinity is the conservative parameter. By this same method, the corresponding T-S diagram allows a determination of the net heat gain of the upwelling water body during its offshore transport, and consequently the corresponding residence time in the photic zone. By integrating the nutrient consumption over the whole upwelling area, it is possible to obtain a more realistic average value of the productivity than with direct measurements of photosynthetic activity (14C and other...
Tipo: Text
Palavras-chave: Primary production; Dynamical oceanography; T/S diagrams; Fertility; Biomass; Upwelling; Pelagic environment; Analytical techniques; Biological production.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1527.pdf

Is fertility of hybrids enough to conclude that the two oysters Crassostrea gigas and Crassostrea angulata are the same species?
Provedor de dados: 5
Autores: Huvet, Arnaud; Gerard, Andre; Ledu, Christophe; Phelipot, Pascal; Heurtebise, Serge; Boudry, Pierre.
The distinction of the two cupped oysters Crassostrea gigas (Thunberg, 1793) and Crassostrea angulata (Lamark, 1819) into two species was chiefly due to their differing geographical distributions, C. gigas being present in Asia and C. angulata in Europe. Today it is commonly accepted that C. angulata and C. gigas are a single species according to morphological, genetic and F1 hybridization data. However, the demonstration of the fertility of their hybrids and the absence of any reproductive isolation remained to be investigated. Consequently, we studied the fertility of hybrids and sperm competition by performing three different experiments and producing G1 and G2 hybrid progenies between wild populations of C. angulata and C. gigas. Progenies showed very...
Tipo: Text
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Developmental yields of larvae; Fertility; Controlled crosses; Hybridization.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-1395.pdf

Additive transcriptomic variation associated with reproductive traits suggest local adaptation in a recently settled population of the Pacific oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Sussarellu, Rossana; Huvet, Arnaud; Lapegue, Sylvie; Quillen, Virgile; Lelong, Christophe; Cornette, Florence; Jensen, Lasse Fast; Bierne, Nicolas; Boudry, Pierre.
Background Originating from Northeast Asia, the Pacific oyster Crassostrea gigas has been introduced into a large number of countries for aquaculture purpose. Following introduction, the Pacific oyster has turned into an invasive species in an increasing number of coastal areas, notably recently in Northern Europe.  Methods To explore potential adaptation of reproductive traits in populations with different histories, we set up a common garden experiment based on the comparison of progenies from two populations of Pacific oyster sampled in France and Denmark and their hybrids. Sex ratio, condition index and microarray gene expression in gonads, were analyzed in each progeny (n = 60).  Results A female-biased sex-ratio and a higher condition index were...
Tipo: Text
Palavras-chave: Crassostrea gigas; Adaptation; Invasiveness; Fertility; Sex-ratio; Transcriptome; Microarray.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00287/39829/38343.pdf

Hatchery-scale trials using cryopreserved spermatozoa of black-lip pearl oyster, Pinctada margaritifera
Provedor de dados: 5
Autores: Hui, Belinda; Vonau, Vincent; Moriceau, Jacques; Tetumu, Roger; Vanaa, Vincent; Demoy-schneider, Marina; Suquet, Marc; Le Moullac, Gilles.
Cryopreservation is a valuable tool for genetic improvement programs. Several bivalve mollusc species have already been the subject of such programs and the Tahitian black pearl oyster industry is now planning the development of selective breeding for desirable traits in Pinctada margaritifera. The ability to cryopreserve spermatozoa would, therefore, offer significant benefits to the cultured black pearl industry.  Spermatozoa were cryopreserved with CPA 0.7 M trehalose in 0.8 M Me2SO and a two-step freezing process was used: straws were first maintained in nitrogen vapour for 10 minutes, then directly plunged into liquid nitrogen and stored for one week before use. The viability of thawed sperm was 23 % lower than that of fresh sperm. When using thawed...
Tipo: Text
Palavras-chave: Cryopreservation; Spermatozoa; Fertility; Larval rearing; Pearl oyster; Pinctada margaritifera.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00040/15098/12446.pdf

The role of astaxanthin in shrimp pigmentation
Provedor de dados: 5
Autores: Latscha, T.
Carotenoids are exogenously derived isoprenoid compounds which are responsible for pigmentation in crustaceans. While implants and bacteria are able to synthesize these carotenoids de novo, shrimps like other animals entirely depend on their dietary supply. The major carotenoid found in most crustacean tissues and responsible, e.g. for the typical colour of penaeids is astaxanthin. With increasing industrialization in shrimp farming there is a growing demand for synthetic, nature-identical carotenoids, not only for pigmentation, but also for the maintenance of growth and fertility.
Tipo: Text
Palavras-chave: Metapenaeus monoceros; Penaeus japonicus; Penaeus monodon; Penaeidae; Marine crustaceans; Marine invertebrates; Diets; Fertility; Growth; Marine aquaculture; Shrimp culture; Colour.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1466.pdf

Effects of Nandrolone Decanoate on Spermatogenesis in Wistar Rats With and Without Physical Training
Provedor de dados: 77
Autores: Maia,Bernardo Porto; Silveira,Jéssica de Oliveira; Borges,Mariana Garcia Lisboa; Pereira,Danilo Ales Ponzi; Pinheiro,Julyara Lima; Freitas,Jofre Jacob da Silva; Kietzer,Katia Simone.
Androgenic anabolic steroids (AAS) are artificial testosterone analogues, used as medicine in chronic diseases, because they increase protein synthesis generating muscle hypertrophy. Its effect has caught the attention of athletes and gym users, thus their consumption has become epidemic, due to easy marketing, the immediate results and the false impression that it doesn't carry health risks. Such risks may globally harm the body. This study aims to investigate the influence on spermatogenesis of using nandrolone decanoate with or without physical training. Twenty-four rats, divided into four groups were used: sedentary group (SG), sedentary on steroids group (SSG), trained group (TG) and trained on steroids group (TSG). The animals were trained on...
Tipo: Journal article
Palavras-chave: Spermatogenesis; Anabolic agents; Nandrolone; Exercise; Fertility.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000300046

Age at Menarche and Related Factors in Girlsof Urban Areas of Markazi (Central) Province of Iran
Provedor de dados: 77
Autores: Bayat,ParvinDokht; Ghanbari,Ali; Khazaei,Mozafar; Ghorbani,Rostam; Amiri,Sara.
The age at menarche is an indicator of racial, geographical and nutritional patterns of different societies. This cross-sectional study conducted on 1223 girls aged 14-20 in the Markazi (Central) Province, Iran in 2010. In this research, the age at menarche, as the main variable, was determined for each city and compared between different cities. The statistical analyses included c2 test for determining statistically significant differences, variance analysis for determining the difference between groups, and Pearson correlation coefficient for determining the relationship between variables. The average age of first menstruation was 13.21±1.33 years in the Markazi Province, with no significant difference among the cities of the province. This age is...
Tipo: Journal article
Palavras-chave: Fertility; Growth; Iran; Menarche.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000100002

Effect of the Treatment with Dexamethasone, for 10 and 15 Days, on the Fertility in Induced Rats to Polycystic Ovaries, by Constant Illumination
Provedor de dados: 77
Autores: Moraes,Eleonora de Figueiredo; Wanderley Teixeira,Valéria; Teixeira,Álvaro Aguiar Coelho; Silva,Welma Emídio da; Batista,Ana Paula Castor; Lemos,Ana Janaína Jeanine Martins de.
The present study had the objective of obtaining information about fertility in rats treated with dexamethasone for 10 and 15 days consecutively, to polycystic ovaries, induced by constant illumination. It was used 40 albino rats (Rattus norvegicus albinus), aged 90 days, form the lineage Wistar, which were split, randomly, in four groups, each constituted of 10 animals, namely: Group I - rats kept in a clear/dark cycle for 12/12 hours, and after 100 days submitted to fertility evaluation (control); Group II - rats kept under constant illumination during 100 days and then submitted to fertility evaluation; Group III - rats kept under constant illumination during 100 days, then treated with dexamethasone for 10 days and submitted to fertility evaluation;...
Tipo: Journal article
Palavras-chave: Fertility; Polycystic ovaries; Dexamethasone; Rats.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000300024

High Exposure to Boron in Drinking Water and Sperm Parameters in Chilean Young People
Provedor de dados: 77
Autores: Cortés,Sandra; Espinoza-Navarro,Omar; Ferreccio,Catterina.
Our aim was to describe sperm parameters in residents from Northern Chile. We evaluated in 101 volunteers (18 and 30 years old) urinary and drinking water Boron levels using Inductively Coupled Plasma Mass Spectrometry; semen parameters were measured with standardized methods. Each individual was categorized in 3 levels of exposure: low (B levels in urine 2.94 mgL-1 or tap water 3.0 mgL-1), medium (urinary B between 2.95-7.4 mgL-1 and B in tap water with 3.0-7.0 mgL-1) and high (urinary B &gt; 7.4 mgL-1 or tap water &gt; 7.0 mgL-1). We found no significant differences among groups by pH, sperm concentration (45.1; 48.2 and 38 million/mL), motility 1th hour (38.1; 40.0 and 45.5 %) and vitality 1th hour (88.6; 88.0 and 76.9 %) respectively. Abnormal...
Tipo: Journal article
Palavras-chave: Boron; Semen; Seminal Parameters; Fertility; Boron exposure; Chile.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100017

Actiflagelin, a new sperm activator isolated from Walterinnesia aegyptia venom using phenotypic screening
Provedor de dados: 80
Autores: El-Aziz,Tarek Mohamed Abd; Khoury,Sawsan Al; Jaquillard,Lucie; Triquigneaux,Mathilde; Martinez,Guillaume; Bourgoin-Voillard,Sandrine; Sève,Michel; Arnoult,Christophe; Beroud,Rémy; Waard,Michel De.
Abstract  Background Sperm contains a wealth of cell surface receptors and ion channels that are required for most of its basic functions such as motility and acrosome reaction. Conversely, animal venoms are enriched in bioactive compounds that primarily target those ion channels and cell surface receptors. We hypothesized, therefore, that animal venoms should be rich enough in sperm-modulating compounds for a drug discovery program. Our objective was to demonstrate this fact by using a sperm-based phenotypic screening to identify positive modulators from the venom of Walterinnesia aegyptia.  Methods Herein, as proof of concept that venoms contain interesting compounds for sperm physiology, we fractionated Walterinnesia aegyptia snake venom by RP-HPLC and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Snake venom; Walterinnesia aegyptia; Bioactive compounds; Fertility; Sperm motility; Venomics; Tandem mass spectrometry; De novo sequencing; Edman degradation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100301

Contrasting effects of biochar versus manure on soil microbial communities and enzyme activities in an Aridisol
Provedor de dados: 18
Autores: Elzobair, K.A.; Stromberger, M.E.; Ippolito, J.A.; Lentz, R.D.
Biochar has been shown to increase microbial activity, alter microbial community structure, and increase soil fertility in arid and semi-arid soils, but at relatively high rates that may be impractical for large-scale field studies. This contrasts with organic amendments such as manure, which can be abundant and inexpensive if locally available, and thus can be applied to fields at greater rates than biochar. In a field study comparing biochar and manure, a fast pyrolysis hardwood biochar (10 tons per acre), dairy manure (19 tons per acre), a combination of biochar and manure at the aforementioned rates, or no amendment (control) was applied to an Aridisol (n=3) in fall 2008. Plots were annually cropped to corn.  Surface soils (0-12 inches) were sampled...
Tipo: Article
Palavras-chave: Chemistry; Fertility; Soil.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1599/1/1557.pdf

Biochar elemental composition and factors influencing nutrient retention
Provedor de dados: 18
Autores: Ippolito, J.A.; Spokas, K.A.; Novak, J.M.; Lentz, R.D.; Cantrell, K.B.
Biochar is the carbonaceous solid byproduct of the thermochemical conversion of a carbon-bearing organic material, commonly high in cellulose, hemicelluloses, or lignin content, for the purposes of carbon sequestration and storage.  More specifically, the thermal conversion process known as pyrolysis occurs when carbon-containing substances are introduced to elevated temperatures in the absence of oxygen at varying residence times, yielding biochar.  Several pyrolysis techniques employed to produce biochar differ in the temperature of reaction and residence time in the reactor.  Different reactor residence times are described as slow (hours to days), fast (seconds to minutes), and flash (seconds).  Fast or flash pyrolysis typically occurs around 500oC with...
Tipo: Book Section
Palavras-chave: Fertility; Soil quality; Fertilizer.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1590/1/1547.pdf

Fertility Management (Chatper 9)
Provedor de dados: 18
Autores: Westermann, D.T.
Tipo: Book Section
Palavras-chave: Fertility; Mass Import - autoclassified (may be erroneous).
Ano: 1993
URL: http://eprints.nwisrl.ars.usda.gov/780/1/800.pdf

The effectiveness of recovered magnesium phosphates as fertilizers in neutral and slightly alkaline soils
Provedor de dados: 18
Autores: Massey, M.S.; Davis, J; Ippolito, J.A.; Sheffield, R.E.
Magnesium phosphates such as struvite (MgNH4PO4x6H2O) can be recovered from municipal, industrial and agricultural wastewaters.  However, minimal research has been conducted on the beneficial reuse of these recovered products; conducted research has focused on low pH soils.  This study determined whether recovered struvite and dittmarite (MgNH4PO4xH2O) were effective P fertilizers in alkaline soils.  In addition to commercially available triple superphosphate (TSP) and certified organic rock phosphate (RP), recovered struvite, dittmarite, and a heterogeneous recovered phosphate were evaluated in a laboratory dissolution study and as fertilizers for spring wheat (Triticum aestivum L.) in a greenhouse study.  Struvite and dittmarite were much more soluble...
Tipo: Article
Palavras-chave: Chemistry; Fertility; Soil quality; Water.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1576/1/1532.pdf

Phosphorus Fertility Relationships of Central Washington Irrigated Soils (with special emphasis on exposed calcareous subsoils)
Provedor de dados: 18
Autores: James, D.W.; Leggett, G.E.; Dow, A.I.
To facilitate irrigation in central Washington, land  is leveled or smoothed on a broad scale. As a result, the  calcareous and extremely infertile subsoils are exposed  and used directly as a medium for plant growth. Phosphorus  fertilizer requirements of exposed subsoils were  determined by measuring crop yield and P uptake on  plots that were fertilized in the current and one, two  or three preceding seasons. Annual crops used as indicators  of P availability at three sites were field beans,  Sudangrass and sugar beets. A supplementary experiment  involved fertilization of a previously established  alfalfa crop. Crop growth and P uptake results were  correlated with sodium bicarbonate soil testing
Tipo: Technical Bulletin
Palavras-chave: Calcareous soil; Fertility; Phosphorous; Mass Import - autoclassified (may be erroneous).
Ano: 1967
URL: http://eprints.nwisrl.ars.usda.gov/1133/1/105.pdf

Characterizing Soil Fertility by Ion Diffusive Flux Measurements
Provedor de dados: 18
Autores: Massee, T.W.; Olsen, R.A.; Skogley, E.O.
Tipo: Article
Palavras-chave: Fertility; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1977
URL: http://eprints.nwisrl.ars.usda.gov/314/1/369.pdf

Anatomy of a field trial: Wood-based biochar and compost influences a Pacific Northwest soil
Provedor de dados: 18
Autores: Ippolito, J.A.; Grob, J; Donnelly, A.
Biochar land application research in elevated rainfall areas (980 millimeters of annual rainfall) of the U.S. Pacific Northwest is lacking.  A proof-of-concept field study examined the effects of spruce-pine-fir wood chip biochar (slow pyrolysis; 450-500 degrees Celsius; 35 megagrams per hectare), dairy manure compost (105 megagrams per hectare), compost + biochar (35 and 105 megagrams per hectare, respectively), and a control (no biochar or compost) on glacially altered soil (sandy or loamy skeletal, isotonic, mesic humic or aquic Dystroxerepts) chemical properties and growth characteristics of vetch and sweet corn over a growing season.  In-season liming (5.4 megagrams per hectare) occurred to raise the soil pH for adequate crop growth.  Biochar, alone...
Tipo: Article
Palavras-chave: Chemistry; Manure; Research methodology; Fertility.
Ano: 2015
URL: http://eprints.nwisrl.ars.usda.gov/1595/1/1553.pdf

Small Grain Residue Management Effects on Soil Organic Carbon:  A Literature Review
Provedor de dados: 18
Autores: Tarkalson, D.D.; Brown, B.; Kok, H.; Bjorneberg, D.L.
Impact of wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) straw removal from fields on soil organic C (SOC) is a concern.  Increased animal populations and potential development of cellulosic ethanol production could increase the removal of straw from fields.  This paper focuses on the effects of wheat and barley straw removal on SOC in irrigated production systems, and related the results to estimates of the minimum straw C inputs required to maintain SOC (MSC) from rain-fed systems. Six studies compared SOC changes with time in irrigated systems in which wheat straw was removed or retained.  These studies indicated that SOC did not decline when residues were removed. Apparently belowground biomass is supplying C to irrigated soils at a rate...
Tipo: Article
Palavras-chave: Fertility; Soil quality.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1413/1/1383.pdf

Effectiveness of recovered magnesium phosphates as fertilizers in neutral and slightly alkaline soils
Provedor de dados: 18
Autores: Massey, M.S.; Davis, J.G.; Ippolito, J.A.; Sheffield, R.E.
Tipo: Article
Palavras-chave: Fertility; Chemistry.
Ano: 2009
URL: http://eprints.nwisrl.ars.usda.gov/1309/1/1285.pdf

Measuring and interpreting rangeland soil fertility
Provedor de dados: 18
Autores: Mayland, H.F.
Tipo: Article
Palavras-chave: Fertility; Mass Import - autoclassified (may be erroneous).
Ano: 1968
URL: http://eprints.nwisrl.ars.usda.gov/182/1/125.pdf

Soil health, crop productivity, microbial transport, and mine spoil response to biochars
Provedor de dados: 18
Autores: Novak, J.M.; Ippolito, J.A.; Lentz, R.D.; Spokas, K.A.; Bolster, C.H.; Sistani, K.R.; Trippe, K.M.; Phillips, C.L.; Johnson, M.G.
Biochar is being evaluated by scientists from the United States Department of Agriculture (USDA) Agricultural Research Service (ARS) for its potential to sequester soil C, to improve soil health, and to increase crop yields.  ARS scientists from multiple locations such as Florence, SC, Kimberly, ID, Bowling Green, KY, Corvallis, OR, and St. Paul, MN, are conducting investigations with agronomic experiments at the laboratory, greenhouse, and field plot scales. To further expand biochars utility, ARS scientists have collaborated with United States Environmental Protection Agency (US EPA) investigators to reclaim mine-impacted soils. In the agronomic investigations, both positive and negative aspects of biochar application were revealed.  In some experiments,...
Tipo: Article
Palavras-chave: Fertility; Soil quality; Soil.
Ano: 2016
URL: http://eprints.nwisrl.ars.usda.gov/1621/1/1578.pdf

Comparison of nitrogen fertilization methods and rates for subsurface drip irrigated corn in the semi-arid Great Plains
Provedor de dados: 18
Autores: Tarkalson, D.D.; Payero, J.O.
Tipo: Article
Palavras-chave: Fertility; Nitrogen.
Ano: 2008
URL: http://eprints.nwisrl.ars.usda.gov/1297/1/1274.pdf

Transport of steroid hormones in the vadose zone after land application of beef cattle manure
Provedor de dados: 18
Autores: Van Donk, S.J.; Bigas, S; Kranz, W.L.; Snow, D.D.; Bartlelt-Hunt, S.L.; Mader, T.L.; Shapiro, C.A.; Shelton, D.P.; Tarkalson, D.D.; Zhang, T.C.; Ensley, S.M.
A variety of naturally occurring steroid hormones are regularly excreted by livestock, while additional steroid hormones have been used as growth promoters by the livestock industry. Depending on manure age and storage conditions, both groups of compounds are likely to be present during application to crops. Recent research suggests that some estrogens, androgens and progestagens in surface waters may originate from runoff after land application of livestock manure. Groundwater may also be impacted by livestock manure when used as a nutrient source to crops and may be indicated by excess nitrate in water. Few studies have been conducted to investigate the potential of steroid hormones contamination of groundwater. The objective of this study was to monitor...
Tipo: Article
Palavras-chave: Feed preference; Chemistry; Fertility.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1591/1/1548.pdf

Induced spawning and reproductive variables of the catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)
Provedor de dados: 83
Autores: Santos,Hélio Batista dos; Sampaio,Edson Vieira; Arantes,Fábio Pereira; Sato,Yoshimi.
Lophiosilurus alexandri is an endemic fish from the São Francisco River basin, Brazil. The aim of this study was to induce L. alexandri to spawn and to obtain data on several reproductive variables for this species. For induced spawning, adults were submitted to Cyprinus carpio pituitary homogenate (CPH). Nine of the 12 females (75%) responded positively to the treatment. The stripping of oocytes was performed 8.4 h after the second dose of CPH with the water temperature maintained at 26ºC. The number of stripped oocytes per gram of ova was 74 ± 5 oocytes g-1, and the mean oocyte diameter was 3.1 ± 0.2 and 3.6 ± 0.2 mm, before and after hydration, respectively. The oocytes were opaque, yellowish, demersal, highly adhesive, and covered by a gelatinous coat....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial reproduction; Fecundity; Fertility; Hypophysation assay; Neotropical catfish.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300607

Factors Affecting the Fertility of Ewes after Intrauterine Insemination with Frozen-Thawed Semen During the Non-Breeding Season
Provedor de dados: 19
Autores: FUKUI, Yutaka; KOHNO, Hirohide; OKABE, Kentaro; KATSUKI, Sara; YOSHIZAWA, Masahiro; TOGARI, Tetsuro; WATANABE, Hiroyuki; 福井, 豊.
In this study, two successive field trials were conducted during the non-breeding season to investigate various factors affecting on fertility of Suffolk ewes after intrauterine insemination with frozen-thawed semen. In the first year (Experiment 1), three sperm numbers per insemination dose (0.25, 0.5 and 1 million sperm) and five sheep farms were used, and in the second year (Experiment 2), parity, age, body weight, body condition score (BCS) and postpartum days were investigated to compare pregnancy and lambing rates. High pregnancy and lambing rates (70.6 and 70.6%, respectively) were obtained with 0.25 million sperm per dose. There were no significant differences in the pregnancy and lambing rates among the five farms, but there was a tendency for one...
Palavras-chave: Artificial insemination; Fertility; Frozen semen; Sheep.
Ano: 2010
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2817

Etude d’une population de l'algue brune Padina pavonica (L) Lamouroux a Cap Zebib (nord de la Tunisie)
Provedor de dados: 20
Autores: El Abed, A.; Ben Said, R.; Romdhane, M.S.
A population of the brown alga Padina pavonica has been studied in the locality of Cap Zebib (North of Tunisia) between September 2000 and August 2001. Abiotic factors (temperature ,salinity  , oxygen ) and biotic ones (weight, height, diameter, biomass, and fertility) were carried out . The results showed that temperature varied between 12°C (February) and 24.5 °C (July). Salinity has recorded a little variation during the year .Oxygen ranged between 4.4 mg/l( March) and 10mg/l (November).Padina pavonica changed monthly . The weight ranged between 0.39g (February) and 18.8 g (August)  . Minimum and maximum height were recorded respectively in January (2.07 cm) and September (7.3 cm) . Diameter varied between 1.32 cm (December) and 8.9 cm (August) ....
Tipo: Journal Contribution
Palavras-chave: Algae; Fertility; Biomass; Length-weight relationships; Brown algae; Http://aims.fao.org/aos/agrovoc/c_35039.
Ano: 2002
URL: http://hdl.handle.net/1834/247

Evaluation des ressources côtières au Sénégal
Provedor de dados: 20
Autores: Fall, M.
La présente campagne en mer du N/O ITAF DEME constitue la 3 ième partie de l'activité d'évaluation de la biomasse en saison froide, des ressources démersales cîtères du Sénégal. Du fait de certains contraintes (réparation du bourrelet du chalut, fêtes religieuses, vote pour certains marins,etc.) elle a été programmée sur 05 jours (24-28 avril 2001). Suite logique de la mission qui l'a précédé cette sortie vise, pour l'essentiel à complèter d'abord la visite des stations restantes de la radiale X, puis à assurer celle des radiales XI et XII en zone centre. Soit un total théorique de 32 traits de chalut à réaliser.
Tipo: Book
Palavras-chave: Canoe fisheries; Fee fishing; Saline water; Water analysis; Fertility; Cruise reports; Biomass; Biomass; Saline water; Water analysis; Fertility; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_16376; Http://aims.fao.org/aos/agrovoc/c_16064; Http://aims.fao.org/aos/agrovoc/c_2862.
Ano: 2001
URL: http://hdl.handle.net/1834/1712

Fertilidad y fecundidad de Montastraea annularis en un arrecifes degradado
Provedor de dados: 20
Autores: Alvarado-Ch., E.; Acosta, A.
Este estudio determinó el ciclo gametogénico, fecundidad y fertilidad de Montastraea annularis en el arrecife de isla Grande, archipiélago de Nuestra Señora del Rosario, uno de los arrecifes más degradados del Caribe colombiano. La población de estudio se caracteriza por poseer colonias medianas (alrededor de 3379 cm2), con mortalidad parcial en 27 % de los ramets y totoal en el 10 % de los mismos. Las colonias presentan un alto número de ramets pequeños producto de la fisión (76 % menores a 50 cm2). Basado en las características de la estructura de tallas de la población mencionada, el objetivo de esta investigación fue explicar el bajo reclutamiento registrado en la zona, a través de la respuesta reproductiva de una población con dominancia de ramets...
Tipo: Journal Contribution
Palavras-chave: Degradation; Fecundity; Fertility; Gametogenesis; Degradation; Gametogenesis; Fecundity; Fertility; Http://aims.fao.org/aos/agrovoc/c_2159; Http://aims.fao.org/aos/agrovoc/c_27931; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_2862.
Ano: 2009
URL: http://hdl.handle.net/1834/3610

Contribution sur la gestion et la valorisation des ressources au Sénégal
Provedor de dados: 20
Au Sénégal le secteur de la pêche maritime jour un rôle socioéconomique de premier plan comparé aux autres activités du secteur primaire comme l'agriculture et l'élevage la pêche a enregistré une croissance qui a eu un impact important dans l'amélioration des revenus des populations côtères des investissements et des exportations de produits halieutiques.
Tipo: Report
Palavras-chave: Histamines; Ground water; Fertility; Fauna; Fish; Ground water; Fauna; Fish; Fertility; Http://aims.fao.org/aos/agrovoc/c_11367; Http://aims.fao.org/aos/agrovoc/c_2821; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_2862.
Ano: 2003
URL: http://hdl.handle.net/1834/1729

La rhodophycée Gelidium spinosum (s.g. Gmelin) p.c. Silva, des cotes de Monastir : lumière sur quelques aspects hydro-biologiques
Provedor de dados: 20
Autores: Romdhane, M.S.; Ben Said, R.; El Abed, A.; M'Rabet, R.
في هذه الدراسة تمت متابعة الطحلب الأحمر  Gelidium spinosum  على سواحل المنستير منذ سبتمبر 2000 إلى أوت 2001 و أبرزت النتائج المتحّصل عليها أن الوزن الأقصى تم تسجيله في ماي وهو حوالي 37غ أما الطول الأقصى (11 صم) فقد تم الحصول عليه في شهر جوان . و أما الكتلة الحيوية الأعلى فقد تم التحصل عليها في شهر ماي (حوالي 7 كغ/م2) . أما نسبة الخصوبة فتراوحت بين 0 و 100% . كل هذه النتائج بينت لنا أن الطحلب  Gelidium spinosum هو نبتة معمرة لكن حضورها متميز أكثر في الربيع والصيف .
Tipo: Journal Contribution
Palavras-chave: Gelidiales  Gelidium spinosum  Rhodophyta; Biomass; Fertility; Length; Seaweeds; Weight; Biomass; Length; Fertility; Seaweeds; Weight; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_4260; Http://aims.fao.org/aos/agrovoc/c_2862; Http://aims.fao.org/aos/agrovoc/c_14154; Http://aims.fao.org/aos/agrovoc/c_8349.
Ano: 2007
URL: http://hdl.handle.net/1834/4285

Reproduction de Mustelus mustelus (Linné, 1758) en Mauritanie
Provedor de dados: 20
Autores: Ould Mohamed Fall, K.
L’étude de la reproduction de Mustelus mustelus a été réalisée sur des individus collectés auprès de la pêche artisanale de Nouadhibou (Mauritanie) de novembre 2000 à octobre 2001. Un échantillon mensuel d’une centaine d’individus a permis de collecter des données sur la reproduction de cette espèce. Le sex ratio est légèrement en faveur des femelles. La fécondation des ovocytes a lieu toute l’année en Mauritanie, avec un pic très important en juillet-août. La gestation dure de 7 à 10 mois et la parturition commence en février et se poursuit jusqu’en mai. Les individus mesurent à la naissance entre 240 et 320 mm. La fécondité varie selon la taille des femelles. Durant la période d’étude, elle a varié entre 1 à 10 embryons chez les femelles porteuses.  The...
Tipo: Journal Contribution
Palavras-chave: Fécondation; Fécondité; Gestation; Rapport Hépato Somatique; Rapport Gonado Somatique; Taille à la naissance; Mustelus mustelus; Parturition; Shark fisheries; Fertility.
Ano: 2002
URL: http://hdl.handle.net/1834/208

Milk yield and reproductive performance of dairy heifers and cows supplemented with polyunsaturated fatty acids
Provedor de dados: 86
Autores: Gonzalez,Félix; Muiño,Rodrigo; Pereira,Víctor; Martinez,Diego; Castillo,Cristina; Hernández,Joaquín; Benedito,José Luis.
The objective of this work was to determine productive and fertility responses of Holstein-Friesian heifers and cows to supplementation with extruded linseed and soybean as sources of polyunsaturated fatty acids (PUFAs). Supplementation had a positive effect on profitability, with significant increases in milk yield in supplemented cows, but not in heifers. Treatments had no effect on milk fat content, but higher milk protein contents were observed with supplementation. A higher conception rate was found for supplemented heifers, but not for cows. Fat sources containing PUFAs are recommended for dairy cattle supplementation, since they improve fertility in heifers and milk yield in cows.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Extruded linseed; Extruded soybean; Fertility; Long-chain fatty acids; Milk composition; PUFA.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000400306

Oral progesterone supplementation for beef cattle after insemination in TAI programs
Provedor de dados: 86
Autores: Loiola,Marcus Vinícius Galvão; Bittencourt,Rodrigo Freitas; Rodrigues,Alexandra Soares; Ferraz,Priscila Assis; Lima,Marcos Chalhoub Coelho; Carvalho,Caio Victor Damasceno; Ribeiro Filho,Antonio de Lisboa.
Abstract: The objective of this work was to evaluate the effects of supplementation with melengestrol acetate (MGA), after timed artificial insemination (TAI), on the conception rate of Nellore cows, according to cyclicity during the protocol, estrus expression between intravaginal device withdrawal and insemination, and diameter of the largest follicle at the time of insemination, in order to identify predictors of the use of MGA. Multiparous lactating cows (577) were subjected to a hormonal protocol for ovulation synchronization. On day -2 of the protocol, the animals were painted with a marker on the base of their tail. On day 0, they were evaluated for estrus expression; the preovulatory follicle diameter (POFD) was measured by ultrasonography, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anestrous; Bovine; Fertility; Insemination; Melengestrol acetate.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100105

Use of topsoil for restoration of a degraded pasture área
Provedor de dados: 86
Autores: Amaral,Luise Andrade; Pereira,Israel Marinho; Silva,Michele Aparecida Pereira da; Oliveira,Marcio Leles Romarco de; Machado,Evandro Luiz Mendonça; Laia,Marcelo Luiz de.
Abstract: The objective of this work was to evaluate the influence of topsoil thickness, shading and origin when performing environmental restoration in a degraded pasture area. The experiment was conducted in a randomized block design with a factorial (3 x 2 x 2) + 2 layout. Treatments consisted of combinations of topsoil origins (forest at early or middle regeneration stages), topsoil thicknesses (10, 20, or 30-cm superficial soil layer), and presence or absence of 70% shading; with two additional control treatments. Surveys on topsoil physical-chemical attributes and flora and soil coverage were conducted. Good correlation was observed between bulk density and total porosity. Vegetation comprised a total of 2,932 individuals of herbaceous, shrub and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecosystem restoration; Fertility; Natural regeneration; Topsoil application.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101080

Raising the Financial Costs of Children and Fertility Responses: Evidence from the Kibbutz
Provedor de dados: 31
Autores: Ebenstein,   Avraham; Hazan,   Moshe; Simhon,   Avi.
Prior to 1996, Israelis in collective communities (kibbutzim) shared the costs of raising children equally. This paper examines the impact of the privatization of kibbutzim on fertility behavior among members. We find that fertility declined by 6-15 percent following the shift to privatization. In light of the massive change in financial costs associated with childbearing due to privatization, our results suggest that financial considerations may be a more modest factor in fertility decisions than generally regarded.
Tipo: Article
Palavras-chave: Kibbutz; Costs of Children; Fertility; Privatization; Financial Economics; Institutional and Behavioral Economics.
Ano: 2011
URL: http://purl.umn.edu/122844

Fertility in South Dublin a Century Ago: A First Look
Provedor de dados: 31
Autores: Guinnane,   Timothy W.; Moehling,   Carolyn M.; Grada,   Cormac O.
Ireland's relatively late and feeble fertility transition remains poorly-understood. The leading explanations stress the role of Catholicism and a conservative social ethos. This paper reports the first results from a project that uses new samples from the 1911 census of Ireland to study fertility in Dublin and Belfast. Our larger project aims to use the extensive literature on the fertility transition elsewhere in Europe to refine and test leading hypotheses in their Irish context. The present paper uses a sample from the Dublin suburb of Pembroke to take a first look at the questions, data, and methods. This sample is much larger than those used in previous studies of Irish fertility, and is the first from an urban area. We find considerable support for...
Tipo: Working or Discussion Paper
Palavras-chave: Ireland; Fertility; Demography; Labor and Human Capital; J1; N3.
Ano: 2001
URL: http://purl.umn.edu/28434

Management of reproduction in Scottish suckler herds
Provedor de dados: 31
Autores: Stott,   Alistair W.; Gunn,   George J.; Varo Barbudo,   Antonio.
A survey of the management of reproduction on 66 Scottish suckler herds calving in spring 2003 was analysed using multiple regression. The predicted mean value of suckled calves produced was £237/cow (SE 1.8). The regression coefficients of the predictors was 0.74 (0.05), 15 (3.9) and 248 (16.5) for date of first calving, average number of 21-day calving periods (calving spread) and proportion of cows barren respectively. Improving each predictor by 1 SD had the combined potential to improve predicted calf value by £64/cow, over 80% of the current typical gross margin for this type of enterprise. Bull care had a significant influence on calving spread and number of biosecurity measures taken had a positive influence on the proportion of cows barren....
Tipo: Conference Paper or Presentation
Palavras-chave: Beef cow; Fertility; Economics; Management; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/36871

Testing for a Supply Constraint to Fertility: Interpreting the Up to God Response to the Survey Question on Desired Family Size
Provedor de dados: 31
Autores: Sinha,   Nistha.
The paper outlines a methodology that allows us to determine whether couples’ fertility is supply constrained based on the response they give to the subjective desired family size question. The central idea of the paper is that, when faced with the desired family size question, both constrained and unconstrained couples compare their demand for children with knowledge of their biological supply and unconstrained couples respond with a number while constrained couples respond with a qualitative response such as, “It is Up to God” (UTG), that essentially conveys the notion of demanding as many children as the supply function can yield. I then test this interpretation using data from Bangladesh. I find that controlling for demand side characteristics,...
Tipo: Working or Discussion Paper
Palavras-chave: Fertility; Desired fertility; Survey nonresponse; Consumer/Household Economics; J13; C25.
Ano: 2004
URL: http://purl.umn.edu/28461

Family Structure, Fertility and Child Quality in Colombia
Provedor de dados: 31
Autores: Ribero,   Rocio.
This paper analyzes how family structure and fertility alter children quality in Colombia. Reduced form models to determine marital status of women and number of children ever born are estimated considering factors that affect women's bargaining powers inside the marriage. Tentative estimates of structural interdependence between these variables and children outcomes are outlined, revealing that marriage has a positive link with child quality and fertility has a negative link with child quality. Colombian national household survey data at rural and urban levels are used for the estimations.
Tipo: Working or Discussion Paper
Palavras-chave: Family structure; Fertility; Child quality; Consumer/Household Economics; J00; J12; J13.
Ano: 2000
URL: http://purl.umn.edu/28390

Institutions and Demographic Responses to Shocks: Wuttemberg, 1634-1870
Provedor de dados: 31
Autores: Guinnane,   Timothy W.; Ogilvie,   Sheilagh.
Simple Malthusian models remain an important tool for understanding pre-modern demographic systems and their connection to the economy. But most recent literature has lost sight of the institutional context for demographic behavior that lay at the heart of Malthus’s own analysis. This paper estimates a short-run version of a Malthusian model for two Württemberg communities from 1646 to 1870. Württemberg differed institutionally from the northwest European societies analyzed in previous studies. The impact of institutional differences shows clearly in differing demographic reactions to economic shocks. Mortality was less sensitive to shocks than one would expect, while nuptiality was especially sensitive.
Tipo: Working or Discussion Paper
Palavras-chave: Malthusian models; Mortality; Fertility; Nuptiality; Guilds; Institutional and Behavioral Economics; Labor and Human Capital; Research Methods/ Statistical Methods; N33; J10.
Ano: 2008
URL: http://purl.umn.edu/5977

Fertility, Child Work and Schooling Consequences of Family Planning Programs: Evidence from an Experiment in Rural Bangladesh
Provedor de dados: 31
Autores: Sinha,   Nistha.
Despite the attractiveness of experiments from the perspective of program evaluation, there have been very few program experiments in the area of family planning. This paper evaluates an ongoing family planning program experiment in rural Bangladesh. The paper estimates the effect of mothers'’ program exposure on fertility and children’'s time allocation. The results show that while the program was effective in reducing fertility, it had no significant impact on children’'s school enrollment. However, the program appears to have significantly raised boys'’ participation in the labor force.
Tipo: Working or Discussion Paper
Palavras-chave: Fertility; Child labor; School enrollment; Program evaluation; Labor and Human Capital; J13; J22; I21.
Ano: 2003
URL: http://purl.umn.edu/28457

BANANA CULTIVAR TRIALS FOR FRUIT PRODUCTION, ORNAMENTAL-LANDSCAPE USE, AND ORNAMENTAL-NURSERY PRODUCTION IN SOUTH GEORGIA
Provedor de dados: 31
Autores: Fonsah,   Esendugue Greg; Krewer,   Gerard; Rieger,   Mark.
North America is the largest net importer of bananas on a regional basis. The United States is still the world’'s number- one importer and consumer of bananas. U.S. companies spend approximately $1.1 billion each year on banana imports, purchasing 31.1% of total world imports (Fonsah 2002; FAO 2001). Bananas and plantains together have been rated the fourth most important crop in the world in terms of food value and food security. This research is aimed at determining the feasibility and suitability of Annual Cropping Production (ACP) for a niche market under Georgia weather conditions and, determining which cultivars have the greatest potential for ornamental-landscape use and ornamental-nursery production. Phenological and pomological sampling and data...
Tipo: Journal Article
Palavras-chave: Banana; Cultivars; Input application; Fertility; Field operations; Production; Marketing; Quality; Landscape; Green industry; Finger length; Calibration; Pseudo-stem; Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/27149

ANALYSIS OF SOIL FERTILITY TESTING PROCEDURES USING UNIFORM, TOPOGRAPHICAL AND OTHER SITE-SPECIFIC METHODS
Provedor de dados: 31
Autores: Haugen,   Ronald H.; Aakre,   Dwight G.
This study summarizes an analysis of uniform, topographical and other site-specific soil fertility testing procedures based on observations of various crops at various locations in North Dakota and one location in Minnesota for 2001 through 2004. Results showed little difference in economic returns among the soil fertility testing methods by crop or location.
Tipo: Working or Discussion Paper
Palavras-chave: Fertility; Topography; Soil testing; Site-specific; North Dakota; Land Economics/Use.
Ano: 2005
URL: http://purl.umn.edu/23580

Family Size, Economics and Child Gender Preference: A Case Study in the Nyeri District of Kenya
Provedor de dados: 31
Autores: Kiriti,   Tabitha; Tisdell,   Clement A.
Kenyan women have more children, especially in rural areas, than in most developing nations. This is widely believed to be an impediment to Kenya’s economic development. Thus, factors influencing family size in the Kenyan context are important for its future. A brief review of economic theories of fertility leads to the conclusion that both economics and social/cultural factors must be considered simultaneously when examining factors that determine the number of children in a family. The need to do this is borne out in Kenya’s situation by utilising responses from a random sample of rural households in the Nyeri district of Kenya. Economic and social/cultural factors intertwine to influence family sizes in this district. After providing a summary of the...
Tipo: Working or Discussion Paper
Palavras-chave: Family size; Fertility; Child gender preference; Human capital formation; Costs; Benefits; Free child labour; Marital status; And age.; Labor and Human Capital.
Ano: 2003
URL: http://purl.umn.edu/105583

Do Family Caps Reduce Out-of-Wedlock Births? Evidence from Arkansas, Georgia, Indiana, New Jersey and Virginia
Provedor de dados: 31
Autores: Dyer,   Wendy Tanisha; Fairlie,   Robert W.
Using Current Population Survey (CPS) data from 1989 to 1999, we examine the impact of family cap policies, which deny incremental welfare benefits, on out-of-wedlock birth rates. We use the first five states that were granted waivers from the Department of Health and Human Services to implement family caps as “natural experiments.” Specifically, we compare trends in out-ofwedlock birth rates in Arkansas, Georgia, Indiana, New Jersey and Virginia to trends in states that did not implement family caps or any other waivers prior to the Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA). We employ several techniques to increase the credibility of results from our “natural experiment,” such as the inclusion of multiple comparison groups,...
Tipo: Working or Discussion Paper
Palavras-chave: Welfare; Family caps; Fertility; Labor and Human Capital; I3; J1.
Ano: 2003
URL: http://purl.umn.edu/28431

The Fertility of the Irish in America in 1910
Provedor de dados: 31
Autores: Guinnane,   Timothy W.; Moehling,   Carolyn M.; Grada,   Cormac O.
In most western societies, marital fertility began to decline in the nineteenth century. But in Ireland, fertility in marriage remained stubbornly high into the twentieth century. Explanations of Ireland’s late entry to the fertility transition focus on the influence of the Roman Catholic Church in Irish society. These arguments are often backed up by claims that the Irish outside of Ireland behaved the same way. This paper investigates these claims by examining the marital fertility of Irish Americans in 1910 and produces three main findings. First, the Irish in America had smaller families than both the rural and urban Irish and their fertility patterns show clear evidence of fertility control. Second, despite the evidence of control, Irish-Americans...
Tipo: Working or Discussion Paper
Palavras-chave: Ireland; United States; Fertility; Demography; Immigration; Labor and Human Capital; J13; N3.
Ano: 2002
URL: http://purl.umn.edu/28386

Job Instability and Family Planning: Insights from the Italian Puzzle
Provedor de dados: 31
Autores: Sabatini,   Fabio.
This paper carries out an investigation into the socio-economic determinants of couples’ childbearing decisions in Italy. Since having children is in most cases a “couple matter”, the analysis accounts for the characteristics of both the possible parents. Our results do not support established theoretical predictions according to which the increase in the opportunity cost of motherhood connected to higher female labour participation is responsible for the fall in fertility. On the contrary, the instability of the women’s work status (i.e. their being occasional, precarious, and low-paid workers) reveals to be a significant dissuasive deterrent discouraging the decision to have children. Couples with unemployed women are less likely to plan childbearing as...
Tipo: Working or Discussion Paper
Palavras-chave: Fertility; Family Planning; Parenthood; Childbearing; Participation; Job Instability; Labour Precariousness; Social Capital; Italy; Labor and Human Capital; C25; J13; Z1.
Ano: 2010
URL: http://purl.umn.edu/92835

Fertility and Female Work Force Participation in Bangladesh: Causality and Cointegration
Provedor de dados: 31
Autores: Hossain,   Mohammad; Tisdell,   Clement A.
This paper examines the causal links between fertility and female labor force participation in Bangladesh over the period 1974-2000 by specifying a bivariate and several trivariate models in a vector error correction framework.  The three trivariate models alternatively include average age at first marriage for females, per capita GDP and infant mortality rate, which control for the effects of other socio-economic factors on fertility and female labor force participation.  All the specified models indicate an inverse long-run relationship between fertility and female labor force participation.  While the bivariate model also indicates bidirectional causality, the multivariate models confirm only a unidirectional causality – from labor force participation...
Tipo: Working or Discussion Paper
Palavras-chave: Fertility; Female Labor Force Participation; Causality; Labor and Human Capital; C32; J13; J22.
Ano: 2003
URL: http://purl.umn.edu/106947

Effect of crude protein levels and organic selenium supplementation in the diets fed during the breeding season on reproductive parameters of red-winged tinamous (Rhynchotus rufescens)
Provedor de dados: 89
Autores: Felipe,L; Santos,EC; Tavian,AF; Góes,PAA; Moraes,VMB; Tonhati,H; Boleli,IC; Malheiros,EB; Barnabé,VH; Queiroz,SA.
There is little information on the nutrition of red-winged tinamous (Rhynchotus rufescens) reared in captivity, and their nutritional requirements still need to be determined. This study aimed at determining dietary crude protein requirements and testing four organic selenium supplementation levels in the diet of red-winged tinamous during the breeding season. Birds were housed in a conventional broiler house divided in 16 boxes with one male and three females each. Iso-energy (2800kcal ME/kg) pelleted feeds, based on corn and soybean meal, were supplied in tube feeders. In the first experiment, treatments consisted of four different diets containing different crude protein (CP) contents (15, 18, 21, or 24%) and in the second experiment, the four diets...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg weight; Fertility; Nutrition; Semen quality; Shell thickness.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000100010

Production and reproduction of egg- and meat-type quails reared in different group sizes
Provedor de dados: 89
Autores: Santos,TC; Murakami,AE; Fanhani,JC; Oliveira,CAL.
Egg- and meat-type quails were reared in groups of different sizes with a fixed female-to-male ratio of 2 to 1 and an area of 158 cm² per bird. The aim was to investigate the influence of group size on quail production and reproductive variables. To this end, 360 quails (180 meat and 180 egg-type quails) were assigned in a completely randomized experimental design to one of three treatments with ten replicates each. The treatments consisted of groups with nine, six, or three quails per cage. Birds were observed for three cycles of 14 days. Daily feed intake and feed conversion ratio were influenced (p &lt; 0.05) by group size in both types of quails. Quail type influenced (p &lt; 0.05) daily feed intake, feed conversion, and egg weight due to the typical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Hatchability; Quail; Reproduction; Vitelline membrane.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100002

Processed Canola Meal Effects on the Traits of Egg, Fertility, Cecal Microbial Population and Carcass of Broiler Breeder Hens
Provedor de dados: 89
Autores: Dolatifard,A; Jafari,MA.
ABSTRACT The aim of the current research was to study the effect of canola meal processing methods on the traits of egg, fertility, cecal microbial population, and the carcass of broiler breeder hens. Canola meal was processed by fermentation and enzymatic hydrolysis methods, then was fed to the hens. Four hundred and fifty broiler breeder hens of Ross strain weighing 3300±150 g (40 weeks) were used for 12 weeks. A completely randomized design was used with 6 treatments (unprocessed, processed by Lactobacillus Plantarum, Bacillus Subtilis, Aspergillus Oryzae, Neurospora Sitophila, and Alcalase enzyme) and 5 replications. Fifteen hens were included in each pen. The data collected were analyzed using the LSmeans procedure of SAS software. The treatment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caecum; Fermentation; Fertility; Processing.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000400308

Fuzzy Classification in the Determination of Input Application Zones
Provedor de dados: 90
Autores: Lima,Julião Soares de Souza; Costa,Felipe Pianna; Xavier,Alexandre Cândido; Silva,Samuel de Assis.
ABSTRACT Correctly interpreting soil fertility and its spatial distribution within an area helps to lessen losses and environmental effects associated with agriculture, to optimize fertilization and liming practices. This study is aimed at using concepts and methods from spatial and temporal analyses to soil fertility and to develop a fuzzy classification methodology in an effort to define input application zones in three conilon coffee harvests. An irregular network with georeferenced points was built in the central region of the farm. Soil samples were collected at 0.00-0.20 m depth within the projections of tree canopies. Geostatistical analysis was used to set up maps in which the variables were shown. In such maps, input and output fuzzy sets were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Management zones; Geostatistics; Fertility.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100306

Biochar: Agronomic and environmental potential in Brazilian savannah soils
Provedor de dados: 91
Autores: Petter,Fabiano A.; Madari,Beata E.
Due to the high activity of microorganisms, the loss of soil organic matter is high in tropical regions. This loss becomes even greater if the soil is managed improperly or when there is no technology that leverages the permanence of the soil carbon by maintaining appropriate levels of organic matter, providing chemical, physical and biological soil improvements and contributing to reduce CO2 emissions to the atmosphere. Due to its aromatic structure, biochar is a highly stable form of carbon in the soil that may contribute to the reduction of greenhouse gas emissions, such as CO2, N2O and CH4, and act as a soil conditioner, improving the physical and chemical properties of the soil. Biochar may also result in increased productivity due to the improvement...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrogenic carbon; Fertility; Yield; Greenhouse gas emission.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000700009

Age and multiple mating effects on reproductive success of Grapholita molesta (Busck) (Lepidoptera, Tortricidae)
Provedor de dados: 92
Autores: Morais,Rosana M. de; Redaelli,Luiza R.; Sant'Ana,Josué.
The reproductive success of the oriental peach moth was evaluated in four experiments: 1) assessment of the mating duration, fecundity, fertility and longevity of females paired with virgin and immediately mated males; 2) mating duration, spermatophore size, fecundity, fertility and longevity in females paired with virgin and up to four times mated males; 3) receptivity of females to additional copulations after mating with virgin or mated males, and the effects of this behavior in female fecundity, fertility and longevity; 4) influence of insects age in the reproductive output. Males (33%) could copulate immediately after a previous copula. They were fertile until the fourth mating, but only in the first copula they transferred the longest (1.43 ± 0.10...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Copulations; Fertility; Oriental fruit moth.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300009

Impact of small variations in temperature and humidity on the reproductive activity and survival of Aedes aegypti (Diptera, Culicidae)
Provedor de dados: 92
Autores: Costa,Ethiene Arruda Pedrosa de Almeida; Santos,Eloína Maria de Mendonça; Correia,Juliana Cavalcanti; Albuquerque,Cleide Maria Ribeiro de.
In short space of time increase in temperature and rainfall can affect vector populations and, consequently, the diseases for them transmitted. The present study analyzed the effect of small temperature and humidity variations on the fecundity, fertility and survival of Aedes aegypti. These parameters were analyzed using individual females at temperatures ranging from 23 to 27 °C (mean 25 °C); 28 to 32 °C (mean 30 °C) and 33 to 37 °C (mean 35 ºC) associated to 60±8% and 80±6% relative humidity. Females responded to an increase in temperature by reducing egg production, oviposition time and changing oviposition patterns. At 25 ºC and 80% relative humidity, females survived two-fold more and produced 40% more eggs when compared to those kept at 35 ºC and 80%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Climate changes; Dengue; Fecundity; Fertility; Mosquito.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262010000300021

Bioeconomic impact of bull breeding soundness examination in cow-calf systems
Provedor de dados: 96
Autores: Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Lampert,Vinícius do Nascimento; Borges,João Batista Souza; Peripolli,Vanessa.
It was evaluated the bioeconomic impact of the breeding soundness evaluation on beef cattle production in southern Brazil. Two similar production systems, with and without the use of breeding soundness evaluation, were compared during 4 years in the municipality of Júlio e Castilhos. The rate of unsound bulls in the first examination was 22.8%. By performing the examination, calf production increased by 31%, 13.8 calves/bull/year and 24 kg of calves/cow/year. The benefit/cost ratio on the investment with the breeding soundness evaluation was R$ 35.84. The breeding soundness evaluation improves bioeconomic aspects of beef cow-calf systems.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef cattle; Efficiency; Fertility; Productivity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200028

Maternal age influences on reproductive rates in Nile tilapia (Oreochromis niloticus)
Provedor de dados: 96
Autores: Valentin,Fernanda Nogueira; Nascimento,Nivaldo Ferreira do; Silva,Regiane Cristina da; Tsuji,Eduardo Akira; Paes,Maria do Carmo Faria; Koberstein,Teresa Cristina Ribeiro Dias; Nakaghi,Laura Satiko Okada.
In this study we examined the effects of the maternal age on the fecundity (absolute and relative), egg production, and fertilization rates of Nile tilapia (Oreochromis niloticus). Females were divided into three groups: Group 1 (6 years old), Group 2 (3 years old), and Group 3 (8 months old). Males of eight months were used in all groups. Twice a week, the females' mouths were examined, and if they had eggs, these were removed and transferred to 2-L incubators. No difference was observed in the absolute fecundity between the different maternal age groups. Relative fecundity and egg production was greater in Group 3 (8 months) and fertilization rates were lower in Group 1 (6 years). Younger tilapias are more viable for egg production, because they have...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Quality of gametes; Reproduction traits.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000400161

Effects of photoperiod on reproduction of Siamese fighting fish Betta splendens
Provedor de dados: 96
Autores: Giannecchini,Luiz Gustavo; Massago,Haluko; Fernandes,João Batista Kochenborger.
This study investigated the effect of different photoperiods (24 h of light (L):0 h of darkness (D); 20L:4D; 16L:8D; 12L:12D; and 8L:16D) on the reproduction and growth of Betta splendens. The results showed that spawning frequency was significantly higher in couples reared under 16L:8D and 12L:12D, in comparison with other treatments. The highest number of eggs per spawn was obtained under 16L:8D (544.76±375.23) and 12L:12D (471.13±261.52), and the lowest values were detected for 24L:0D (128.55±58.14) and 20L:4D (187.87±103.84). Fertility and fecundity also showed significantly higher average values in 16L:8D and 12L:12D when compared with 24L:0D and 20L:4D treatments. Egg volume and perivitelline space were significantly higher in 24L:0D treatments that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Fertility; Light regimen; Ornamental fish.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400001

Reproductive success or failure in four breed groups of beef bulls
Provedor de dados: 96
Autores: Menegassi,Sílvio Renato Oliveira; Barcellos,Júlio Otávio Jardim; Peripolli,Vanessa; Dias,Eduardo Antunes; Costa Junior,João Batista Gonçalves; Vieira,Maitê de Moraes; Moojen,Fernanda Gomes.
The objective of this study was to determine the main causes of failure in bull breeding using a soundness evaluation in Rio Grande do Sul State/Brazil. We evaluated 19,836 bulls from 15 different breeds with ages ranging from two to eight years. The failures of bulls in each step were analyzed by logistic regression. The binary logistic regression was applied because the response variable had only two responses: Success (1) and Failure (0). Older bulls are more likely to be rejected than are younger bulls, regardless of their genetic group. Depending on the step of the assessment, one or another group is rejected. All steps of bull breeding soundness evaluation (BBSE) are important, with special attention to the failures of the behavioral evaluation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: BBSE; Fertility; Mounting ability; Scrotal circumference.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000700240

Effect of the ovulatory follicle diameter and progesterone concentration on the pregnancy rate of fixed-time inseminated lactating beef cows
Provedor de dados: 96
Autores: Pfeifer,Luiz Francisco Machado; Leal,Sofia del Carmen Bonilla de Souza; Schneider,Augusto; Schmitt,Eduardo; Corrêa,Marcio Nunes.
The objective of this study was to evaluate the influence of the ovulatory follicle diameter on the reproductive performance of lactating beef cows subjected to low progesterone fixed-time artificial insemination (FTAI) protocols. Ninety-three lactating beef cows (60-80 days postpartum) at random stages of estrous cycle were given a luteolytic dose of prostaglandin F2α (500 μg cloprostenol; PGF) twice, 11 d apart. Ten days after the second PGF treatment, cows were given 1.5 mg of estradiol benzoate im and a progesterone-releasing intravaginal device (Cue-Mate) with a single pod containing 0.78 g progesterone (Day 0). Cows received another luteolytic dose of PGF on Day 0. On Day 8, the Cue-Mate was removed. Fifty-four to 56 hours later, cows received 12.5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteum; Fertility; Post-partum cows; Progesterone.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400024

Genetic and environmental variance and covariance parameters for some reproductive traits of Holstein and Jersey cattle in Antioquia (Colombia)
Provedor de dados: 96
Autores: Zambrano,Juan Carlos; Echeverri,Julián.
The objective of this study was to estimate the genetic, phenotypic and environmental parameters for calving interval (CI), days open (DO), number of services per conception (NSC) and conception rate (CR) in Holstein and Jersey cattle in Antioquia (Colombia). Variance and covariance component estimates were obtained by an animal model that was solved using the derivative-free restricted maximum likelihood method. The means and standard deviations for CI, DO, NSC and CR were: 430.32±77.93 days, 127.15±76.96 days, 1.58±1.03 services per conception and 79.88±28.66% in Holstein cattle, and 409.33±86.48 days, 125.62±86.09 days, 1.48±0.98 services per conception and 84.08±27.23% in Jersey cattle, respectively. The heritability estimates (standard errors) were:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Genetic correlation; Heritability; Repeatability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300005

EFFECTS OF TWO PHYTOTHERAPIC FORMULATIONS CONTAINING Glycine max (L.) MERR ON MALE RAT FERTILITY
Provedor de dados: 101
Autores: Boemler Hollenbach,Clarissa; Bortolini,Carlos Eduardo; Mattos Rodrigues,Juliano; Hirtz,Lucas; Bastos de Mello,Fernanda; Braga de Mello,João Roberto.
The present study evaluates the effects of two commercial phytotherapic formulations containing Glycine max (L.) Merr. (Soy) (Phytotherapic A and Phytotherapic B) on Wistar rat fertility. Doses were based on the manufacturer's recommendation and increased in a logarithmic scale. The animals were divided into six experimental groups and a control group, which received distillated water. Three groups were treated with Phytotherapic A and three groups were treated with Phytotherapic B. The doses were: 4.3mg.kg-1.day-1, 21.5 mg.kg-1.day-1 and 43 mg.kg-1.day-1, respectively, for GPA1, GPA2, GPA3, and GPB1, GPB2, GPB3. The males were treated during ninety-one days, before and during the mating. Female Wistar rats were treated before and during the mating,...
Tipo: Journal article
Palavras-chave: Soy; Glycine max; Phytotherapic; Male rats; Fertility; Toxicity.
Ano: 2012
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0253-570X2012000100005

Interspecific hybrids between Paspalum plicatulum and P. oteroi: a key tool for forage breeding
Provedor de dados: 63
Autores: Novo,Patricia Elda; Valls,José Francisco Montenegro; Galdeano,Florencia; Honfi,Ana Isabel; Espinoza,Francisco; Quarin,Camilo Luis.
ABSTRACT Grama-tio-pedro (Paspalum oteroi Swallen) is a rare stoloniferous grass of the Plicatula group of Paspalum, well adapted to continuous grazing in areas subject to seasonal flooding in the Pantanal region, in central western Brazil. The species is a facultative apomictic (asexual reproduction by seed) tetraploid, sporadically cultivated on Pantanal farms, propagated either by cuttings or seed. Due to its potential for extensive cultivation and forage quality, Grama-tio-pedro appears as a candidate for genetic improvement within the Plicatula group through plant breeding. We used a colchicine-induced sexual autotetraploid genotype of P. plicatulum Michx. to obtain interspecific hybrids using the apomictic species, P. oteroi, as pollen donor. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DNA content; Apomixis; Fertility; Meiosis; Reproductive mode.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000400356

Study on the changes of soil characteristics in corn and sorghum producing areas
Provedor de dados: 106
Autores: Jongruk Chanchareonsook; Sukum Chotechuangmanirat.
8 tables
Palavras-chave: Corn; Maize; Sorghum; Production; Soil characteristics; Chemical property; Fertility; ข้าวโพด; ข้าวฟ่าง; ลักษณะของดิน; ความอุดมสมบูรณ์ของดิน.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4591

ผลของการเก็บรักษานํ้าเชื้อในรูปแบบวุ้นที่อุณหภูมิ 5 °ซ ต่อการเคลื่อนที่และอัตราการผสมติดของนํ้าเชื้อไก่พื้นเมือง
Provedor de dados: 106
Autores: Pronjit Sonseeda; Yupin Phasuk; Sinchai Wirojwuttikul; Thevin Vongpralub.
Objective of this research was to study effect of solid semen storage at 5°C on motility and fertility of Thai native chicken. Experiment 1, aim to evaluate the possible benefits of supplementation of gelatin and agar to IGGKP extender on motility of spermatozoa. The experiment was performed to compare between seven semen treatments on sperm motility in vitro, 1) extender (control), 2) extender + 0.7% gelatin, 3) extender + 1.4% gelatin, 4) extender + 2.5% gelatin, 5) extender + 0.3% agar, 6) extender + 0.5% agar and 7) extender + 0.7% agarSemen samples were stored at 5°C for 72 h and four replication were carried on. After semen sample were prewarmed to 37°C the sperm motility characteristics were assessed using Computer-Assisted Sperm Analysis (CASA)....
Tipo: Collection
Palavras-chave: Native chicken; Gelatin; Fertility; Solid semen; Agar; ไก่; พันธุ์พื้นเมือง; อาก้า; อัตราการผสมติด; เจลาติน; นํ้าเชื้อแบบวุ้น; การเก็บรักษาน้ำเชื้อ; อัตราการผสมติด; การเคลื่อนที่.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5288

การหาเครื่องหมายพันธุกรรมที่เกี่ยวข้องกับความสมบูรณ์พันธุ์ในโคนมภายใต้สภาพร้อนชื้น: รายงานการวิจัยฉบับสมบูรณ์
Provedor de dados: 106
Autores: Monchai Duangjinda; Suporn Katawatin; Yupin Phasuk; Tawin Wongpalub.
Tipo: PhysicalObject
Palavras-chave: Dairy cattle; Hot stress; Humid condition; Genetic marker; Animal breeding; Dna; Microsatellites; Allele; Heat tolerance; Fertility; โคนม; ภูมิอากาศ; ความร้อน; ความชื้น; ความเครียด; การทนความร้อน; การปรับปรุงพันธุ์สัตว์; เครื่องหมายพันธุกรรม; ดีเอ็นเอ; ความทนทานต่อความเครียด; ไมโครแซทเทิลไลท์; อัลลีล; ความสมบูรณ์พันธุ์; การผลิตน้ำนม.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5717

The species of Hippolyte Leach (Crustacea, Caridea, Hippolytidae) from Terminos Lagoon, southwestern Gulf of Mexico
Provedor de dados: 104
Autores: Negreiros-Fransozo,M.L; Barba,E; Sanchez,A.J; Fransozo,A; Ráz-Guzmán,A.
The taxonomic identity of specimens of the genus Hippolyte Leach, 1814 of Laguna de Términos was considered including the colour and the presence-absence of tufts of plumose setae on the dorsal surface of the carapace and abdomen as secondary characteristics to morphological features of taxonomic value. Two groups were formed based on appearance: one transparent with setae and another green without setae. The analysis of five morphological characteristics in adult females of the two groups made it possible to identify only H. zostericola (Smith, 1873). Fecundity and fertility were similar (0.5&gt;p&gt;0.2) in both groups. The first zoea of both groups were also morphologically similar. Considering these results, it is concluded that the only species...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hippolyte; Zoea; Fertility; Fecundity; SW Gulf of Mexico.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000300002

Fertilidade do caranguejo de mangue Ucides cordatus (Linnaeus) (Crustacea, Brachyura, Ocypodidae), em Iguape (São Paulo, Brasil)
Provedor de dados: 104
Autores: Hattori,Gustavo Yomar; Pinheiro,Marcelo Antonio Amaro.
A total of 58 Ucides cordatus (Linnaeus, 1763) ovigerous females in final embryonic stage were collected in mangrove forest at Iguape (São Paulo). Each female were kept in laboratory until the larvae hatching and had their carapace width (CW) measured with caliper (0.05 mm) and the larval number (LN) calculated by volumetric method. The hatching rates (HR) were calculated for each animal's size class (5 mm). The values of LN and CW obtained were subjected to regression analyses and the best fitting model was chosen by comparing the obtained determination coefficients (R²). The fertility varied from 71,200 to 220,800 larvae (147,169 ± 32,070 larvae), corresponding to 41.7 to 76.8 mm CW (63.7±7.9 mm), respectively. The relationship LNxCW was expressed by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachyura; Crustacea; Fertility; Ocypodidae; Reproduction; Ucides.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200022

Biological aspects of Tetranychus marianae McGregor (Acari, Tetranychidae) reared on yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg.) leaves
Provedor de dados: 104
Autores: Noronha,Aloyséia C. da S.
The passion fruit plant is a host for several different phytophagous mites, mainly those belonging to the Tarsonemidae, Tenuipalpidae and Tetranychidae families. Among the Tetranychidae species are Tetranychus mexicanus (McGregor, 1950) and Tetranychus desertorum Banks, 1900. The occurrence of Tetranychus marianae McGregor, 1950 was detected on yellow passion fruit Passiflora edulis Sims f. flavicarpa Degener plants under field and greenhouse conditions at the headquarters of Embrapa Cassava &amp;amp; Fruits Tropical Research in Cruz das Almas County, State of Bahia, Northeast Brazil. Prior records of T. marianae on the passion fruit crop in Brazil as well as the biological aspects of this species are unknown. The study on the biology of T. marianae on P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Life table; Mite; Passiflora sp.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200014

Economic evaluation of puberty induction of nulliparian Nellore heifers using intravaginal device and melengestrol acetate
Provedor de dados: 109
Autores: Pereira,Luiz Carlos; de Souza Ferreira,Renan; Fujii Gongalves,Rony; Vinhas Ítavo,Luís Carlos; Signor Kohl,Endyara; Menezes Dias,Alexandre; Barbosa Ferreira,Marcos; Espínala Carvalho,Cristiano Marcelo; Gongalves Mateus,Rodrigo.
Abstract The present study evaluates the economic viability of puberty induction in nulliparous Bos taurus indicus Nellore breed heifers using an intravaginal device of fourth-use and melengestrol acetate (MGA®). The experiment was undertaken in the Nossa Senhora Aparecida Farm, Terenos city, Mato Grosso do Sul, Brazil, and was utilized a completely randomized experimental design in a 2 x 3 factorial scheme. Two age classes were included in the study, which were divided into 348 precocious (early-cycle) heifers, aging 16-18 months, weighting an average of 264.6 kg and 543 conventional-cycle heifers aging 24-26 months averaging 346.8 kg. The three treatments were as follows: control without the induction of follicle formation (treatment 1); treatment 2:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estrus induction; Fertility; Reproductive efficiency; Economic return; Pregnancy rate.
Ano: 2019
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122019000300205

Diversity of the land resources in the Amazonian State of Rondônia, Brazil
Provedor de dados: 36
Autores: Cochrane,T.T.; Cochrane,Thomas. A.
Conflicting opinions are recorded in the literature concerning the suitability of Amazon lands for sustainable agriculture following deforestation. This article has been written to shed light on this question by summarizing climate, landform, soil and vegetation features from the findings of a land resource study of the Brazilian state of Rondônia in south-west Amazonia. The work, which followed the World Soils and Terrain Digital Database (SOTER) methodology, was financed by the World Bank. During the course of the survey special emphasis was given to studying soils; 2914 profiles were analyzed and recorded. The study identified a complex pattern of land units with clear differences in climate, landform, soils and native vegetation. Forested areas mosaic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soils; Rondônia; Land resources; Fertility.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000100011

Effects that nutritional and saline gradients have on the growth of Passiflora mucronata Lam. and Canavalia rosea (Sw.) DC. found in the restinga of Brazil
Provedor de dados: 39
Autores: Lourenço Junior,Jehová; Zambom,Oberdan; Rossi,Magda Santos; Cuzzuol,Geraldo Rogério Faustini.
Salinity and fertility are the main factors cited in Within the restinga (coastal woodland) biome in Brazil, the positioning of Canavalia rosea and Passiflora mucronata occur, respectively, near the shore-in the creeping psammophyte formation (CPF) - and far from the shore - in the Palmae formation (PF). The hypothesis that such positioning is related to salinity and fertility was tested by applying a salt gradient (increasing solutions of NaCl) and a nutritional gradient (different proportions of Hoagland solution). Neither species survived in solutions over 200 mM of NaCl. The shoots of P. mucronata showed negative growth (lower dry mass) in the first week of exposure to saline solutions. The roots of C. rosea showed great sensitivity to salinity, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coastal ecosystems; Fabaceae; Fertility; Nutrition; Passifloraceae; Salinity; Spatial distribution.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200008

Precision agriculture for sugarcane management: a strategy applied for brazilian conditions doi: 10.4025/actasciagron.v36i1.17664
Provedor de dados: 1
Autores: Demattê, José Alexandre Melo; Universidade de São Paulo; Demattê, José Luiz Ioratte; 2Universidade Federal da Paraíba; Alves, Evandro Roberto; Universidade Federal da Paraíba; Barbosa, Roberto Negrão; Agricultural Center, Louisiana State University; Morelli, Jorge Luis; Universidade de São Paulo.
The region of Areiópolis in São Paulo State is one of the major sugarcane producers in the world, and chemical management is the basis of the system making its production viable. Thus, the proposed methods for precision agriculture can be evaluated as an alternative for environment protection and can aid the search for greater productivity at the same time. The main objective of the present work was to compare the precision agriculture (PA) and traditional agriculture (TA) management systems and to highlight their distinctions, such as differences in grid sampling, production variation, plant failure and costs. Two experiments were set up, and the soil fertilizers were applied by corrective application methods to 16-ha lots using the average general...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.01.06-4 tropical soil; Soil sampling; Fertility; Management 5.01.01.06-4.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17664

Superovulatory response, production and quality of embryos of cows fed on linseed or canola seed supplemented diets - doi: 10.4025/actascianimsci.v34i3.13372
Provedor de dados: 2
Autores: Albuquerque, Karina Perohouskei; Universidade Estadual de Maringá; Prado, Ivanor Nunes do; Universidade Estadual de Maringá; Prado, Rodolpho Martin do; 9850-7326; Cavallieri, Fábio Luiz Bin; Centro Universitário de Maringá; Rigolon, Luiz Paulo; Universidade Estadual de Maringá; Barbosa, Orlando Rus; Universidade Estadual de Maringá.
Superovulatory response, production and embryo quality and the effects of seasonal changes on embryo production of Nellore cows fed on either linseed (n-3) or canola seeds (n-6) were evaluated. Sixteen Nellore cows (550 ± 48.0 kg) were fed on three diets: control diet (CON), diet with linseed (LIN) and diet with canola seed (CAN) during four seasons. There was no difference in superovulatory response and in total corpora lutea produced when diets are taken into consideration. The number of cows that responded to superovulatory treatment was higher in the winter (93.8%) than in the summer (62.5%). No difference with regard to the three diets existed on the average number of total structures (6.20, 4.96 and 6.50), unfertilized structures (2.53, 1.17 and...
Tipo: Pesquisa Empírica de Campo
Palavras-chave: Season of the year; Diets; Embryos; Fatty acids; Fertility; Omega 3; Omega 6.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/13372

Desempenho reprodutivo de coelhas submetidas a diferentes níveis de energia digestível nas dietas e idades de desmama de suas ninhadas - DOI: 10.4025/actascianimsci.v31i2.6619
Provedor de dados: 2
Autores: Silva, Waldirene Rossi da; UEM; Scapinello, Cláudio; UEM; Moraes, Gentil Vanini de; UEM; Martins, Elias Nunes; UEM; Faria, Haroldo Garcia de; UEM; Ferreira, Walter Motta; UFMG.
Foram utilizadas 240 ninhadas oriundas de 80 matrizes NZB, nulíparas, durante três ciclos reprodutivos, submetidas a um ritmo de reprodução de 42 dias, distribuídas em um delineamento inteiramente casualizado, em esquema fatorial 2 x 2 x 3 (2.600 e 2.800 kcal ED kg-1 de ração versus desmama aos 28 e 35 dias versus três ciclos reprodutivos). O nível de ED nas rações não afetou o peso das matrizes na desmama de seus láparos e as taxas de fertilidade, independente do ciclo reprodutivo. A melhor condição corporal nos três ciclos das matrizes que desmamaram seus láparos aos 28 dias, permitiu taxas de fertilidade mais altas durante todo o período experimental. À exceção do tamanho da ninhada ao nascer, que foi menor no primeiro parto, o tamanho da ninhada aos 21...
Tipo: Pesquisa de campo
Palavras-chave: Produção Animal; Nutrição de não-ruminantes desempenho de láparos; Tamanho da ninhada; Condição corporal da matriz; Taxa de mortalidade; Fertilidade 5.04.05.00-4 litter performance; Litter size; Corporal condition of does; Mortality; Fertility.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6619

Seasonality of reproduction of epiphytic bryophytes in flooded forests from the Caxiuanã National Forest, Eastern Amazon
Provedor de dados: 42
Autores: CERQUEIRA,GABRIELA R.; ILKIU-BORGES,ANNA LUIZA; FERREIRA,LEANDRO V.
This work aimed to recognize the reproductive biology of the epiphytic bryoflora of phorophytes of Virola surinamensis (Rol. ex. Rottb.) Warb. in várzea and igapó forests in the Caxiuanã National Forest, to answer the following question: The reproductive period of the bryophyte species is influenced by the environment due the climatic seasonality present in flooded forests, being higher the occurrence of the sexual and asexual reproduction in the rainiest months? The bryophytes were identified and analyzed for the type of reproduction, sexual system and reproductive structures. In total, 502 samples of bryophytes were analyzed, resulting in 54 species, of which 34 were fertile. The comparison of the fertility of the species in different environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bryoflora; Fertility; Igapó forest; Várzea forest.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000300903

Plasminogen activator inhibitor 1 and Antipain preserve acrosome integrity of bovine spermatozoa during cryopreservation
Provedor de dados: 45
Autores: Castelo Branco,M.A.; Castelo Branco,Y.N.T.C.; Moraes Junior,F.J.; Barros,F.N.; Barçante,F.P.S.; Carvalho,G.M.C.; Melo Evangelista,L.S.; Abreu-Silva,A.L.; Sousa Filho,M.A.; Souza,J.A.T.
ABSTRACT Seminal plasma contains serine proteases and serine protease inhibitor, which are involved in mammalian fertilization, and the inhibitors can be applied to prevent cold-induced sperm capacitation. The effects of different concentrations of two serine protease inhibitors were analyzed, Plasminogen activator inhibitor 1 - PAI-1 (70ƞg, 140ƞg and 210 ƞg) and Antipain (10µg, 50µg and 100µg) as supplementation to bovine semen cryopreservation extender. The effects of the inhibitors on the sperm parameters (sperm kinetics - CASA, acrosome integrity, plasma membrane integrity, mitochondrial membrane potential, sperm defects and acrosome reaction rate) were evaluated in the post-thaw semen. Cryopreservation of sperm with Antipain decreased post-thaw...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Curraleiro Pé-Duro; Fertility; Seminal evaluation; Serine protease inhibitors; Sperm cryopreservation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000501114

Induction of the acrosome reaction test to in vitro estimate embryo production in Nelore cattle
Provedor de dados: 45
Autores: Costa,M.Z.; Oliveira,L.Z.; Resende,M.V.; Lucio,A.C.; Perini,A.P.; Miguel,M.C.V.; Lima,V.F.M.H.
The effectiveness of induction of the acrosome reaction (AR) test as a parameter to in vitro estimate embryo production (IVP) in Nelore breed and the AR pattern by the Trypan Blue/Giemsa (TB) stain were evaluated. Frozen semen samples from ten Nelore bulls were submitted to AR induction and were also evaluated for cleavage and blastocyst rates. The treatments utilized for AR induction were: control (TALP medium), TH (TALP medium + 10μg heparin), TL (TALP medium + 100μg lysophosphatidylcholine) and THL (TALP medium + 10μg heparin + 100μg lysophosphatidylcholine). Sperm acrosomal status and viability were evaluated by TB staining at 0 and after 4h incubation at 38°C. The results obtained for AR presented a significant difference (P&lt;0.05) in the percentage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Fertility; Semen; Acrosome reaction; Fertilization.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000400001

Correlation between fertility and levels of protein, sugar and free amino acids in seminal plasma of Nelore bulls
Provedor de dados: 45
Autores: Assumpção,T.I.; Torres Júnior,R.A.A.; Sousa,M.V.; Ricart,C.A.O.
Correlations between fertility and the concentrations of proteins, reducing sugars and 17 types of free amino acids in the seminal plasma of Nelore bulls were estimated. The samples were collected from 19 bulls that had high quality semen, according to physical and morphological analyses. The bulls had their fertility scores estimated based on the pregnancy of the females mated to them during three consecutive breeding seasons, either by artificial insemination or by natural breeding. A large variability in the concentrations of the molecules was observed among the samples and a significant correlation coefficient (r= 0.90) between levels of proteins and reducing sugars was estimated. None of the components showed a significant correlation with fertility.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bull; Nelore; Seminal plasma; Fertility; Biochemical composition.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352005000100008

Effect of month of conception on fertility of mares inseminated with jackass semen
Provedor de dados: 45
Autores: Rossi,R.; Gonczarowska,A.T.; Palhares,M.S.; Boeta,A.M.; Resende,Y.F.; Ribeiro,E.A.; Silva Filho,J.M.
Fertility obtained by cross-breeding mares (Equus caballus) with jackasses (Equus asinus) was evaluated. Two extenders, containing skim milk-glucose or egg yolk-glycine were used to study the fertility of mares inseminated with diluted jackass semen (T1 and T2) or diluted and cooled semen at 5°C for 12 hours (T3 and T4). A total of 272 cycles of 208 mares of undefined breeds were evaluated, being uniformly distributed between groups. The cycles were controlled by transrectal palpation and teasing, and mares were inseminated every Tuesday, Thursday and Saturday (three times/week), from the detection of a follicle with 3.0 to 3.5cm diameter in one of the ovaries until ovulation. Pregnancy was detected using transrectal palpation, teasing and ultrasound exams...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Pregnancy loss; Intra and interspecific cross-breeding; Cooled semen.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000100057

Physical characteristics and fertility of fractionated donkey semen cooled at 5°C
Provedor de dados: 45
Autores: Carvalho,L.E.; Silva Filho,J.M.; Palhares,M.S.; Sales,A.L.R.; Gonczarowska,A.T.; Oliveira,H.N.; Resende,M.C.; Neves,M.G.; Madison,R.J.
ABSTRACT The aim of this study was to evaluate the effect of two different extenders (Skimmed Milk Glucose - SMG or Lactose - Egg Yolk - LEY) on physical characteristics and fertility of fractionated donkey semen cooled at 5°C. For this, four Pêga donkeys were used as semen donors. The sperm rich fraction of the ejaculate was diluted preparing insemination doses containing 400 x 106 motile spermatozoa in a volume of 22 mL, cooled to 5°C and stored up to 48 hours in a container proposed by Palhares (1997). Sperm motility and vigor were assessed in fresh semen, after first semen dilution, before insemination, at 24 and 48 hours after storage. For the fertility evaluation, 44 mares were inseminated with semen stored for a period between 12 and 24 hours. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Donkey; Fractionated collection; Cooled semen; Fertility.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000100029

Comparison of sexual performance and testicular characteristics of melatonin treated Kivircik and Charollais rams during the non-breeding season
Provedor de dados: 45
Autores: Cevik,M.; Yilmazer,C.; Kocyigit,A.
ABSTRACT This study was conducted to investigate the effects of melatonin implantation on basic testicular characteristics and reproductive performance of Kivircik and Charollais rams and ewes during the non-breeding season. In this study, 8 Kivircik and 6 Charollais rams were used. Rams were implanted with 54 mg melatonin according to the manufacturer's instructions. At melatonin implantation and at ram introduction the reproductive performance and testicular characteristics were evaluated. Throughout the experimental period, rams were permanently kept outdoors under conditions of natural day length and at ambient temperature. The effects of exogenous melatonin treatments on the reproductive performances of rams and ewes, estrus response, pregnancy rate,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ram; Melatonin; Fertility; Non-breeding season.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200278

Measurement of scrotal circumference in beef bulls in Rio Grande do Sul
Provedor de dados: 45
Autores: Menegassi,S.R.O; Barcellos,J.O.J; Peripolli,V; Pereira,P.R.R.X; Borges,J.B.S; Lampert,V.N.
The variability of scrotal circumference and the effects of age and breed as well as the relationship between testicular weight (TW), scrotal circumference (SC), and live weight (BW) were investigated in bulls. Devon, Polled Hereford, and Red Angus breeds showed higher SC values than the other British, Continental, Synthetic, and Zebu studied breeds. The percentage of culled bulls because of low SC ranged from 7.01 to 24.25%. The increase of SC was proportional to the increase in TW and they were highly correlated (r²= 0.90). The results suggest that SC in young bulls is the best way to predict TW and, therefore, a useful tool for their selection
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertility; Scrotal circumference; Testicular weight.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352011000100014

Mechanisms involved in reproductive damage caused by gossypol in rats and protective effects of vitamin E
Provedor de dados: 48
Autores: Santana,Andréia T; Guelfi,Marieli; Medeiros,Hyllana C D; Tavares,Marco A; Bizerra,Paulo F V; Mingatto,Fábio E.
BACKGROUND: Gossypol is a chemical present in the seeds of cotton plants (Gossypium sp.) that reduces fertility in farm animals. Vitamin E is an antioxidant and may help to protect cells and tissues against the deleterious effects of free radicals. The aim of this study was to evaluate the mechanisms of reproductive toxicity of gossypol in rats and the protective effects of vitamin E. Forty Wistar rats were used, divided into four experimental groups (n = 10): DMSO/ saline + corn oil; DMSO/saline + vitamin E; gossypol + corn oil; and gossypol + vitamin E. RESULTS: Fertility was significantly reduced in male rats treated with gossypol in that a significant decrease in epididy-mal sperm count was observed (P &lt; 0.05) and the number of offspring was...
Tipo: Journal article
Palavras-chave: Gossypol; Fertility; Oxidative stress; Bioenergetics; Antioxidant system; Vitamin E.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100043

Electrolyzed-reduced water increases resistance to oxidative stress, fertility, and lifespan via insulin/IGF-1-like signal in C. elegans
Provedor de dados: 48
Autores: Park,Seul-Ki; Park,Sang-Kyu.
Electrolyzed-reduced water (ERW) scavenges reactive oxygen species and is a powerful anti-oxidant. A positive correlation between oxidative stress and aging has been proved in many model organisms. In Caenorhabditis elegans, many long-lived mutants showed reduced fertility as a trade off against longevity phenotype. We aimed to study the effect of ERW on oxidative stress, fertility and lifespan of C. elegans. We also investigated the genetic pathway involved in the effect of ERW on resistance to oxidative stress and lifespan. We compared lifespan and fertility of worms in media prepared with distilled water and ERW. ERW significantly extended lifespan and increased the number of progeny produced. Then the effect of ERW on resistance to oxidative stress and...
Tipo: Journal article
Palavras-chave: Electrolyzed-reduced water; Aging; Daf-16; Fertility; Lifespan.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000200005

Reproductive parameters of Lonomia obliqua Walker, 1855 (Lepidoptera: Saturniidae) in laboratory
Provedor de dados: 52
Autores: Lorini,Lisete Maria; Rebelato,Gisele Sana; Bonatti,Juliano.
Lonomia obliqua is an insect that has urticant spines in the larval stage. This species may cause death as a result of haemorrhages caused by a toxin released from the caterpillar's spines onto the skin of the victim. Since 1989 when this species was identified in Rio Grande do Sul, Brazil, many accidents have happened. The aim of this study was to verify the oviposition, fecundity, fertility, viability of eggs and incubation period of the species. Adults were left in a moth's cage to mate and lay eggs. Thirteen couples were observed daily, and the number of eggs and the caterpillars emerged were recorded. The results showed a mean of 2.8 (± 1.3) ovipositions, a mean fecundity of 135.3 (± 54.4) eggs/female, a mean fertility of 111.9 (± 55.4) eggs/female, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lonomia obliqua; Urticant caterpillar; Public health; Fecundity; Fertility.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400011

Pellet Method of Semen Cryopreservation: Effect of Cryoprotectants, Semen Diluents and Chicken Lines
Provedor de dados: 52
Autores: Shanmugam,Murugesan; Mahapatra,Ramkrishna.
Abstract The present study evaluated the effect of cryoprotectants, semen diluents and chicken lines during pellet method of semen cryopreservation. Three different experiments were conducted; Experiment 1 - semen was cryopreserved using dimethylformamide (DMF) at 6% and 9% concentrations in two semen diluents (Lake and Ravie diluent and TES/NaCl diluent), Experiment 2 - semen was cryopreserved using dimethylacetamide (DMA) at 6% and 9% with or without sucrose (100mM), Experiment 3- semen from two chicken lines (PD1 and PD6) was cryopreserved using DMA (6% and 9%). Semen was evaluated pre and post cryopreservation for progressive motility, live and abnormal sperm. Semen pellets were stored in cryovials for at least seven days before examination and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken; Diluent; Fertility; Pellet cryopreservation; Semen.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100501

Abiotic factors influencing tropical dry forests regeneration
Provedor de dados: 52
Autores: Ceccon,Eliane; Huante,Pilar; Rincón,Emanuel.
Tropical dry forests represent nearly half the tropical forests in the world and are the ecosystems registering the greatest deterioration from the anthropogenic exploitation of the land. This paper presents a review on the dynamics of tropical dry forests regeneration and the main abiotic factors influencing this regeneration, such as seasonal nature, soil fertility and humidity, and natural and anthropic disturbances. The main purpose is to clearly understand an important part of TDF succession dynamics.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical dry forests; Regeneration; Disturbances; Seasonal variability; Fertility; Moisture.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300016

Fertility Enhancing Potency of Omega-3 Fatty Acids in Male Rats
Provedor de dados: 52
Autores: Nnamonu,Emmanuel Ikechukwu; Mgbenka,Bernard Obialor; Mbegbu,Edmund Chidiebere.
Abstract Cases of some grave side effects of some allopathic medicines used in treatment of infertility has caused a global need for alternatives with minimal or no side effect, hence the demand to evaluate the fertility enhancing potential of omega-3 fatty acids (O3FA) in male rats. This study evaluated the fertility enhancing potential of omega-3 fatty acids (O3FA) in male rats. Seventy-two sexually mature male albino rats 11-13 weeks of age, weighing between 171 - 180 g were assigned into six groups (I - VI) fed graded doses of O3FA. Administration of O3FA lasted twenty-eight days at 48 hour intervals. At the end of the treatment, organosomatic index of testes, testicular and epididymis sperm cells counts and testicular histology were assessed following...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Omega-3 fatty acids; Fertility; Histology; Potency; Male rat.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100318

Residual levels on medroxyprogesterone acetate (MAP) impregnated sponges after estrus synchronization treatment in cyclic ewes
Provedor de dados: 62
Autores: SIMONETTI,Laura; GARDÓN,Juan Carlos; RAMOS,Guillermo.
A pool of polyurethane sponges impregnated with medroxyprogesterone acetate (MAP) was prepared. Real level of progestagen on sponges was checked prior to sponge treatment insertion. During spring a total of 126 cyclic Merino ewes were intravaginally treated with MAP-impregnated pessaries for the synchronization of estrus. After 14 days treatment, sponges were removed. Estrus detection was performed with vasectomized rams. Ewes were inspected for the presence of marks twice a day. Ewes in estrus were artificially inseminated with fresh diluted semen containing a dose of 300x10(6) total sperm. Artificial insemination was performed 12 hours after estrus presentation. Residual levels of MAP (RMAP) on removed sponges were measured by spectrophotometry at 241 nM...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ewes; Estrus synchronization; Medroxyprogesterone acetate; Fertility.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000500003

Reproduction and food habits of the lined seahorse, Hippocampus erectus (Teleostei: Syngnathidae) of Chesapeake Bay, Virginia
Provedor de dados: 57
Autores: TEIXEIRA,R. L.; MUSICK,J. A.
The reproductive and feeding biology of the lined seahorse, Hippocampus erectus, was studied in Chesapeake Bay. Seahorses are monogamous, and males incubate the eggs received from females in a closed brood pouch (= marsupium). Females do not play any parental care after mating. Total sex ratio and the operational sex ratio was strongly skewed toward females. Males and females had similar number of eggs/embryos and hydrated oocytes, respectively. The number of eggs/embryos found in the male brood pouch varied from 97 to 1,552 (fish from 80 to 126 mm TL), whereas the number of hydrated oocytes in female varied from 90 to 1,313 (fish from 60 to 123 mm TL). Both, the number of eggs/embryos and hydrated oocytes were better linearly correlated to total weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Parental care; Fecundity; Fertility; Amphipods; Estuary.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100011

Study of the effects of ß-myrcene on rat fertility and general reproductive performance
Provedor de dados: 56
Autores: Paumgartten,F.J.R.; De-Carvalho,R.R.; Souza,C.A.M.; Madi,K.; Chahoud,I.
ß-Myrcene (MYR) is a monoterpene found in the oils of a variety of aromatic plants including lemongrass, verbena, hop, bay, and others. MYR and essential oils containing this terpenoid compound are used in cosmetics, household products, and as flavoring food additives. This study was undertaken to investigate the effects of MYR on fertility and general reproductive performance in the rat. MYR (0, 100, 300 and 500 mg/kg) in peanut oil was given by gavage to male Wistar rats (15 per dose group) for 91 days prior to mating and during the mating period, as well as to females (45 per dose group) continuously for 21 days before mating, during mating and pregnancy, and throughout the period of lactation up to postnatal day 21. On day 21 of pregnancy one-third of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SS-myrcene; Monoterpenes; Essential oils; Reproductive toxicity; Fertility; Embryofetal toxicity; Postnatal development.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000700012

Fertility of male adult rats submitted to forced swimming stress
Provedor de dados: 56
Autores: Mingoti,G.Z.; Pereira,R.N.; Monteiro,C.M.R.
We investigated whether stress interferes with fertility during adulthood. Male Wistar rats (weighing 220 g in the beginning of the experiment) were forced to swim for 3 min in water at 32ºC daily for 15 days. Stress was assessed by the hot-plate test after the last stressing session. To assess fertility, control and stressed males (N = 15 per group) were mated with sexually mature normal females. Males were sacrificed after copulation. Stress caused by forced swimming was demonstrated by a significant increase in the latency of the pain response in the hot-plate test (14.6 ± 1.25 s for control males vs 26.0 ± 1.53 s for stressed males, P = 0.0004). No changes were observed in body weight, testicular weight, seminal vesicle weight, ventral prostate weight...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Forced swimming stress; Male; Fertility; Rat; Spermatogonia.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000500016

Low-protein diet does not alter reproductive, biochemical, and hematological parameters in pregnant Wistar rats
Provedor de dados: 56
Autores: Barros,M.A.V.; Andrade,E.B.; Barros,R.G.N.; Costa,I.K.M.; Costa,I.C.L.; Vitorino,G.F.A.; Andrade,J.J.C.; Paulino-Silva,K.M.; Nogueira,V.O.; de Brito Alves,J.L.; Costa-Silva,J.H.
The aim of this study was to investigate the reproductive, biochemical, and hematological outcomes of pregnant rats exposed to protein restriction. Wistar rat dams were fed a control normal-protein (NP, 17% protein, n=8) or a low-protein (LP, 8% protein, n=14) diet from the 1st to the 20th day of pregnancy. On the 20th day, the clinical signs of toxicity were evaluated. The pregnant rats were then anesthetized and blood samples were collected for biochemical-hematological analyses, and laparotomy was performed to evaluate reproductive parameters. No sign of toxicity, or differences (P&gt;0.05) in body weight gain and biochemical parameters (urea, creatinine, albumin, globulin, and total protein) between NP and LP pregnant dams were observed. Similarly,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Development; Epigenetics; Fertility; Gestation; Intrauterine growth; Nutrition.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000600613

Effect of obesity on rat reproduction and on the development of their adult offspring
Provedor de dados: 56
Autores: Campos,K.E.; Volpato,G.T.; Calderon,I.M.P.; Rudge,M.V.C.; Damasceno,D.C.
The aim of the present study was to assess the reproductive parameters of obese Wistar rats and to determine the frequency of their obese adult offspring. Neonatal rats were divided into two groups: F1 generation, induced to obesity by monosodium glutamate (MSG; F1MSG, N = 30), and rats given saline (F1CON, N = 13). At 90 days of age all animals were mated, producing the F2 offspring (F2CON, N = 28; F2MSG, N = 15). Reproductive parameters (fertility, pregnancy, and delivery indexes) were evaluated in F1 rats. F2 newborns were weighed, and the obesity parameter for F1 and F2 generations was determined from months 5 to 7 of life. At month 7, periovarian fat was weighed and no differences were found. Mean newborn weight also did not differ. The F1 and F2MSG...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Obesity; Offspring; Fertility; Wistar rats; Monosodium glutamate; Transgeneration.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000200008

Estrogens and male reproduction: a new concept
Provedor de dados: 56
Autores: Carreau,S.; Silandre,D.; Bourguiba,S.; Hamden,K.; Said,L.; Lambard,S.; Galeraud-Denis,I.; Delalande,C.
The mammalian testis serves two main functions: production of spermatozoa and synthesis of steroids; among them estrogens are the end products obtained from the irreversible transformation of androgens by a microsomal enzymatic complex named aromatase. The aromatase is encoded by a single gene (cyp19) in humans which contains 18 exons, 9 of them being translated. In rats, the aromatase activity is mainly located in Sertoli cells of immature rats and then in Leydig cells of adult rats. We have demonstrated that germ cells represent an important source of estrogens: the amount of P450arom transcript is 3-fold higher in pachytene spermatocytes compared to gonocytes or round spermatids; conversely, aromatase activity is more intense in haploid cells. Male germ...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aromatase; Estrogens; Estrogen receptors; Male germ cells; Fertility; Mammals.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600003

Toxicity of Field-Aged Permethrin-Loaded Attracticides on Choristoneura rosaceana (HARRIS) and Pandemis pyrusana Kearfott (Lepidoptera: Tortricidae) Adult Males and Females
Provedor de dados: 117
Autores: Curkovic,Tomislav; Brunner,Jay F; J. Brown,John.
Lethal and sub lethal effects were evaluated in the laboratory on Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott males exposed to an attracticide loaded with permethrin and aged in the field. The effect of pairing conspecific females with previously intoxicated males was also evaluated. In both species a significantly greater mortality of male moths (&amp;#8805; 95%) was observed 24 h after exposure to t he attracticide formulation. Likewise, high levels of knock down (&amp;#8805; 75%) were observed in males of both species 1 h after attracticide exposure. In females, knock down was &amp;#8805; 2.5% and mortality &amp;#8805; 3.3% after pairing with intoxicated males. Leg autotomy in males was at least 73% in C. rosaceana and &amp;#8805;...
Tipo: Journal article
Palavras-chave: Bioassay; Fecundity; Fertility; Knockdown; Leg autotomy; Lethal effects; Mortality; Sub lethal effects.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100003

Virulence and Pre-Lethal Reproductive Effects of Metarhizium anisopliae var. anisopliae on Pseudococcus viburni (Hemiptera: Pseudococcidae)
Provedor de dados: 117
Autores: Pereira,Aldo; Casals,Pedro; Salazar,Ana María; Gerding,Marcos.
Obscure mealybug, Pseudococcus viburni (Signoret), is a cosmopolitan pest that causes damage by suction of vascular juices and the production of honeydew, as well as for being a quarantine insect. Within control options, entomopathogenic fungi are a good alternative, nevertheless, more research is needed. In this research, the Metarhizium anisopliae var. anisopliae (Metschnikoff) isolate Qu-M984 was evaluated on P. viburni under laboratory conditions. Virulence was evaluated by lethal dose 50 (LD50) and lethal time 50 (LT50), for each of the four life stages of the female. The doses tested were 10(5), 10(6), 10(7) and 10(8) conidia mL-1. Also fecundity, egg size, fertility, and longevity of adult females were evaluated at doses of 10(5) and 10(6) conidia...
Tipo: Journal article
Palavras-chave: Lethal dose; Lethal time; Biological control; Entomopathogenic fungus; Fecundity; Fertility; Longevity.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400009

Fertility in the stallion as accessed by the spermatozoa morphology
Provedor de dados: 65
Autores: Pimentel,Cláudio Alves; Hammes,Anelise Maria; Dietrich,Giovani.
In a breeding farm, 129 mares were bred to 4 stallions and had an overall pregnancy rate of 76.7%. Stailions were submitted to semen examination for at least two times at the beginning of the breeding season and the percentage of morphologically normal spermatozoa were used for statistical analysis in relation to the percentage of pregnancy at the end of the breeding season. A regression analysis revealed that the percentage of pregnancy (y) can be estimated by the percentage of normal spermatozoa (x) in the ejaculate according to the following equation: y=52.38+0.44x; r2=97.8%; P&lt;0.01. We concluded that the pregnancy rate can be estimated by the percentage of morphologically normal spermatozoa in the ejaculate of stallions, since it is an importam...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stallion; Semen; Fertility; Spermatozoa; Morphology.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781997000400025

Does planting time affect the nutritional demand and yield of potato cultivars?
Provedor de dados: 65
Autores: Eschemback,Vlandiney; Kawakami,Jackson; Genú,Aline Marques; Almeida,Fabiola Oliveira de.
ABSTRACT:  Determining the level of absorption of nutrients in the potato crop at different stages of development is important because it allows identification of the time when the elements are most required by plants. The objective of this research was to evaluate the level of nutrient absorption in cultivars after different planting times. Field experiment was conducted in Guarapuava-PR. Treatments consisted of three cultivars (Agata, BRS Clara, and BRS F63 Camila) and two planting times (October and February), in randomized blocks, with three replications in the crop season 2015/16. The total macro and micronutrient content (leaves, stems, and tubers) was quantified at 15 and 45 days after plant emergence. The total dry weight of plants was verified at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Fertilization; Fertility; Nutrition; Productivity; Variety.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000600203

Consequences of eight consecutive applications of equine chorionic gonadotropin on ovarian follicle development and ovulation in  bos indicus cows
Provedor de dados: 65
Autores: Stuhr,Bhárbara Delboni; Gil,Isaac Santos; Lacerda,Tracy Ferreira; Favoreto,Mauricio Gomes; Loureiro,Bárbara.
ABSTRACT: The equine chorionic gonadotropin (eCG) is a glycoprotein produced in mare endometrial calices. In bovine, it is used in estrus synchronization protocols. However, studies have shown that it is potentially immunogenic and its effect can decrease after repetitive use. This study aimed to evaluate antral follicle dynamics, corpus luteum (CL) and ovulation rate in bos indicus cows submitted to an estrus synchronization protocol in association with eCG for eight times consecutively. Ten cyclical, multiparous, and pasture raised beef cows were divided into two groups: control group (n=5) and eCG group (n=5). In 30 day interval, all animals were synchronized with the same estrogen/progesterone based protocol, totalizing 8 re-synchronizations. Cows in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteum; ECG; Fertility; Immunity; FTAI.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001102018