Reproductive Costs
Mostrando 13-24 de 53 artigos, teses e dissertações.
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13. Reduction of the bull:cow ratio in the Brazilian Pantanal.
This work was conducted to study alternatives for reduction of the bull:cow ratio in the Brazilian lowland and, therefore, lower the production costs for the local beef cattle industry. The ratios 1:10, 1:25, and 1:40 were used in native pastures with a mean stocking rate of 0.27 mature animal unit per hectare over two consecutive breeding seasons. Statistic
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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14. Baixa produtividade em fêmeas suínas relacionada a perdas corporais na lactação / Low productivity of sows related to body weight loss during lactation
The aim of this work was to relate low productivity to lactational weight loss, identifying the profile of females with more risk, study in details this cohort of sows and evaluate possible alternatives to minimize the effects of catabolism. The first trial evaluated females of different parity order (PO) and weight loss during lactation. There was interacti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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15. Mirmecofilia em Parrahasius polibetes (Lepidoptera: Lycaenidae) : historia natural, custos, seleção de planta hospedeira e beneficios da co-correncia com hemipteros mirmecofilos / Mymecophily ion Parrhansius polibetes (Lepidoptera: Lycaenidae) : natural history costs, host-plant selection, and benefits of co-ocurrece with myrmecophilous hemipterans
Ants are one of the most prominent groups of terrestrial organisms in terms of diversity, relative abundance and biomass. Their importance is due primarily to eusocial behavior combined with complex communication systems. Tropical foliage is rich in renewable feeding sources that promote ant foraging. As some of the most important predators on plants, ants s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/04/2010
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16. Consumo de produtos lácteos e renda familiar de gestantes e nutrizes usuárias de um hospital público de Fortaleza. / Consumption of dairy products and household income pregnant women and nursing mothers attending a public hospital in Fortaleza.
The objective was to interrelate the consumption of milky products and the familiar income of pregnants and breastfeeding mothers of a public hospital of Fortaleza- Ceará. To this, it used a questionnaire of food frequency with reproducibility and validity tested, and one questionnaire about the socioeconomics conditions, having as basic data informations i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/03/2010
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17. Study of in vitro assays to predict mammalian male fertility / Estudo de testes in vitro para predição de fertilidade de machos mamíferos
The knowledge of the reproductive potential of a male has economical and reproductive importance, especially if he is used in artificial insemination programs. The conventional assays for evaluating seminal quality do not have the capacity of measuring the fertilizing potential of a sample, they only indicate if it is within the acceptable parameters for ins
Publicado em: 2010
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18. O efeito inimigo íntimo é aplicável a Dinoponera quadríceps (Hymenoptera, Formicidae)?
Food access, territory or reproductive partner can generate conflicts between individuals in many species with occurrence of aggressive behaviors. However some species respond less aggressively to intrusion by neighbors than non-neighbors in its territory to minimize the costs of continuous fight. This difference in aggression is called Dear Enemy Effect des
Publicado em: 2010
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19. Integral transform solution to the endometrial ablation problem
Menorrhagia is an ailment experienced by a significant number of women during their reproductive years. This condition is associated to heavy menstrual bleeding and while medical treatments are possible, its effects are quite limited. Surgical procedures often employ a hysterectomy but the total removal of the uterus involves high costs and also sometimes a
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-06
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20. Mycoplasmosis in cattle dairy calves: underlying factors for the occurrence and manifestation of the syndrome granular vaginitis / Micoplasmose em bovinos de aptidão leiteira: fatores predisponentes para a ocorrência e manifestação da síndrome vulvovaginite granular
The reduction of reproductive rates is measured by the reduction in the number of calves born that immediately reflected in the reduction of milk production and profitability of commercial property. The effect is the increased administrative costs of maintenance with dry cows, higher rates of rejection and a higher number of doses of semen for conception. Pa
Publicado em: 2009
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21. Sistemas de acasalamento com defesa territorial : evolução, regras das disputas e seleção de territorios em satirineos neotropicais / Mating systems with territorial defense : evolution, contest rules and territory selection in neotropical satyrine Butterflies
Territorial conflicts in flying insects may be resolved through many different ways. In male butterflies, size, age and motivation are often reported as important determinants of the winning chances. However, the rules used when fighting, the biological context that affects the intensity of agonistic behaviors, and the functional role of male traits in the c
Publicado em: 2009
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22. Distribuição e disponibilidade de recursos florais e estratégias de forrageamento na interação entre beija-flores e Palicourea rígida (Rubiaceae)
Some pollination mechanisms represent mutualistics interactions, in which the plants offer nectar and pollen and the pollinators carry the pollen grains. The hummingbirds are the more specialized pollinators among the birds, and their high energetic cost to fly, force them to develop feeding strategies to obtain the highest energetic gains with the lowest co
Publicado em: 2009
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23. Reproductive biology of the harvestman Iporangaia pustulosa (Arachnida: Opiliones): sexual selection and evolution of paternal care / Biologia reprodutiva do opilião Iporangaia pustulosa (Arachnida: Opiliones) : seleção sexual e evolução do cuidado paternal
Exclusive paternal care is rare reproductive strategy that and has evolved only in the order Opiliones among arachnids. Although nearly half of the independent events of evolution of this behavior in arthropods has occurred in the order Opiliones, only a few studies have investigated in detail the reproductive biology of harvestmen species. Iporangaia pustul
Publicado em: 2008
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24. Ecoregion priorization for terrestrial vertebrate conservation / Priorização de ocorregiões para a conservação de vertebrados terrestres
I aimed to identify conservation priorities for terrestrial vertebrates across different spatial scales (from regional/continental to global), using ecoregions as geographic units. I have evaluated, in particular, (1) the congruence between overall richness and endemism patterns among terrestrial vertebrates that occur in Brazil, and the effectiveness of eac
Publicado em: 2008