Populational Density
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Análise espacial das taxas de mortalidade por atropelamento dos municípios paulistas utilizando ferramentas de estatística espacial
The Brazil presents exalted indexes of accidents and constitute one of bigger problems of public health, leaving in year, thousands of deads or peoples with temporaries or permanencies deficiencies. It is necessary to consider that big piece of accidents occurred in the country are trampling down, been that your mortality also presents raised numbers. In Bra
Publicado em: 2007
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14. Occurrence of endocrine disrupters and pharmaceuticals products in surface waters in the Atibaia river basin / Ocorrencia de interferentes endocrinos e produtos farmaceuticos nas aguas superficiais da bacia do rio Atibaia
Numerous organic compounds called endocrine disruptors have been found at low levels in surface waters. Several compounds such as hormones (17b-estradiol, 17a-ethinylestradiol, estrone, progesterone and levonorgestrel), phthalates (diethylphthalate and dibutylphthalate), surfactants (4-octylphenol and 4-nonylphenol), bisphenol A, among others are included in
Publicado em: 2007
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15. Population ecology of Psychotria suterella Mull. Arg. (Rubiaceae) in fragmented Atlantic rainforest landscape / Ecologia de populações de Psychotria suterella Mull. Arg. (Rubiaceae) em uma paisagem fragmentada de Mata Atlantica
There is wide variation in the sensibility levei of plant populations to the decrease of their natural habitats. There are also few studies in priority conservation areas. The objective of this study is to test if the discontinuity and quality of the Atlantic Rainforest affect the structure, alometric relations, dynamics, and seed germinability of the popula
Publicado em: 2006
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16. Fitonematóides associados a zingiberales ornamentais em Pernambuco : estimativa do número de amostras para monitoramento, efeito de indutores de resistência e avaliação de mecanismos envolvidos
The expressive increase in production of tropical flowers in Pernambuco indicates the State rising interest in ornamentals. This study had the objectives of: 1) screening plant parasitic nematodes in Zingiberales (Etlingera elatior, Zingiber spectabilis, Alpinia purpurata, Musa coccinea, Tapeinoquilos ananassae e Heliconia spp.) producing areas of Pernambuco
Publicado em: 2006
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17. Ultra-sonometria óssea para determinação do risco de fratura do fêmur / Bone ultra-sonometry for the assesment of the fêmur fracture risk
Osteoporosis is a disease which affects the bone tissue reducing its resistance that is determined by its density, architecture and speed of remodeling. Currently, the pattern method used for its diagnosis and monitoring is the bone densitometry which makes use of ionizing radiation and because of its high costs, it is not available to the majority of the lo
Publicado em: 2006
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18. Populational and taxonomical studies of fire ants, Solenopsis invicta (Hymenoptera: Formicidae), and of the phenology of their parasitoids of the genus Psedacteon (Diptera: Phoridae) / Estudos populacionais e taxonomicos de formigas lava-pes, Solenopsis invicta (Hymenoptera: Formicidae) e da fenologia de seus parasitoides do genero Pseudacteon (Diptera: Phoridae)
This work discusses some aspects of the ecology of the fire ant species Solenopsis invicta and its phorid parasitoid flies ofthe genus Pseudacteon, and ofthe taxonomy of S. invicta and S. saevissima, both of which are native to South America. The allometry of S. invicta colonies in southeast Brazil was studied by measurement of mound (aboveground) dimensions
Publicado em: 2006
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19. Doses of nitrogen and water sheet in the elephant grass growth / Adubação nitrogenada e lâmina de água no crescimento do capim-elefante
The research was conducted at the Experimental Field of Coronel Pacheco MG, from October 7th, 2003 to January 6th, 2005, in order to evaluate the effects of four doses of nitrogen (100, 300, 500 e 700 kg/ha of N) and six water sheet (0, 20%, 40%, 80%, 100% e 120% of evapotranspiration) over the production of dry matter, populational density of basal tiller,
Publicado em: 2006
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20. Management of Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) on corn, Zea mays L.: basis for populational evaluation and biological control using the egg parasitoid Trichogramma atopovirilia Oatman &Platner, 1983 (Hymenoptera: Trichogrammatidae). / Manejo de Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) em milho, Zea mays L.: bases para avaliação populacional e controle biológico utilizando o parasitóide de ovos Trichogramma atopovirilia Oatman &Platner, 1983 (Hymenoptera:Trichogrammatidae)
The objectives of this research were the improvement of cross-section Spodoptera frugiperda using pheromone traps to verify the capacity of dispersion of Trichogramma atopovirilia as an agent for biological pest control as well as evaluating the attractiveness of Amaranthus sp. to T. atopovirilia females. To improve cross-section of S. frugiperda, the studie
Publicado em: 2004
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21. Supressividade de um solo a murcha-de-fusário do caupi e influência da doença no rendimento da cultura
The Fusarium wilt, caused by Fusarium oxysporum f. sp. tracheiphilum, reduces cowpea yield in Northeastern Brazil. This work aimed to characterize the nature and ability to transfer cowpea Fusarium wilt suppressiveness of a soil; to analyze populational dynamic of F. oxysporum f. sp. tracheiphilum and others soilborne microorganisms in two soils with differe
Publicado em: 2003
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22. Analises de problemas populacionais intraespecificos e interespecificos com difusão densidade-dependente
In this text we construct generic models described by partial differential equations for intraspecific populational dynamics problems with density-dependent diffusion, populational decrement coefficient, and/or malthusian intrinsic reproduction rates varying with time, and velocity fields associated to migratory processes or induced convection by chemotaxy,
Publicado em: 1999
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23. Diversidade e densidade de anuros de serralheria num gradiente altitudinal na mata atlantica costeira
Here I present and discuss data about the diversity and abundance ofleaf-litter frogs along an altitudinal gradient (0-1.000 m) in Ubatuba, São Paulo, (Southeastem Brazil). I sampled the area in three transects, with 64 fenced plots (8 x 8 m) in the summer and 32 in the winter. I considered 11 altitudinal strips, from the plains to the top of the hills. In
Publicado em: 1999
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24. Ecologia comportamental e de interações com plantas hospedeiras em Phyllophaga cuyabana (Moser) (Coleoptera:Melolonthidae, Melolonthinae) e implicações para o seu manejo em cultura de soja
Soybean (Glycine max (L.) Merrill) is an introduced crop which has been expanding in Brazil during the last four decades. There are still some nutricional niches unoccupied or inefficiently explored by arthropods and other colonizing herbivores. Some insects with subterranean habitat have been considered soybean pests in Brazil in the last ten years, probabl
Publicado em: 1997