Plant Animal Interactions
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. 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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14. Remoção de sementes por formigas, aves e roedores em área de Cerrado e seu efeito sobre o recrutamento de plântulas / Seed removal by ants, birds and rodents in a cerrado area and its effects on seedling recruitment
Many plant populations are affected by seed consumers since these can affect the rates and patterns of seedling recruitment. Ants, birds and rodents are main agents of seed removal. Therefore, the aim of this study was to determine the relative importance of ants, birds and rodents on seed removal in different types of Cerrado vegetations and to determine th
Publicado em: 2008
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15. Aplicação de moire de projeção com deslocamento de fase na geração de modelos digitais topograficos de orgão vegetais / Applications of projection moire technique with phase shifiting to agricultural engineering problems
Shape definition of bodies exhibiting symmetric, non symmetric or irregular geometry is of fundamental necessity for science and technology developments. Applications of objects shape survey is reflected on several science fields as biology, human prosthesis and orthesis, medical diagnosis, prediction of surgical results, orthopedics, veterinary medicine, in
Publicado em: 2008
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16. INFLUÊNCIA DO CONTEÚDO DE MATÉRIA SECA E REGULAGENS DE UMA COLHEDORA DE FORRAGEM NOS TAMANHOS DE FRAGMENTOS E NA DENSIDADE DA SILAGEM DE PLANTA INTEIRA DE DOIS HÍBRIDOS DE MILHO (Zea mays L.) 2008 / DRY MATTER CONTENT AND FORAGE HARVESTER SETUP INFLUENCES IN THE PARTICLE SIZE AND BULK DENSITY (Zea mays L.) FOR WHOLE PLANT SILAGE OF TWO HIBRIDS OF CORN
In Brazil, the best dairy farm efficiency levels are obtained in the cities of Castro and Carambeí, State of Paraná. This efficiency was reached due to the animal genetics and the feed management, where the corn whole plant silage has been wide used. To the highest profit of the silage, some stages must be considered. The main stages are the selection of t
Publicado em: 2008
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17. Nutritional evaluation of sugarcane treated with calcium oxide at different times of exposure to cattle / Avaliação nutricional da cana-de-açúcar acrescida de óxido de cálcio em diferentes tempos de amazenamento para bovinos
Were performed 4 experiments aiming evaluate the chemical composition and in vitro and in situ digestive kinetics of sugarcane treated with calcium oxide at different exposure times under nutrients intake and digestibility, performance, and ruminal parameters of Nellore heifers. The first experiment aimed to evaluate the effects of levels of inclusion and ex
Publicado em: 2008
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18. Interactions etween ants, fruits and seeds in the cerrado : the role of ants in the biology of seeds and seedlings / Interações entre formigas, frutos e sementes em solo de cerrado : o papel de formigas na biologia de sementes e plantulas
Our knowledge about seed dispersal systems has been improved considerably in the last few years. An increasing number of studies has shown that the process of plant regeneration is often much more complex than we realize, including several different agents across subsequent steps of seed dispersal. For instance, ants may reshape the seed shadow after seeds f
Publicado em: 2007
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19. Interações entre o morcego Sturnira lilium (Chiroptera: Phyllostomidae) e plantas da família Solanaceae / Interactions between the bat Sturnira lilium (Chiroptera: Phyllostomidae) and plants of the family Solanaceae
Bats have a high ecological importance in the Neotropics for they are highly diverse, very abundant and interact with many plant and animal species. Phyllostomid bats of the subfamily Stenodermatinae are specialized frugivores and important seed dispersers, and Sturnira lilium prefers fruits of the Solanaceae, a family of high ecological and economical value
Publicado em: 2006
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20. Ecologia e comportamento do Cuxiú-Preto (Chiropotes Satanas) na paisagem fragmentada da Amazônia Oriental. / The Ecology and Behaviour of the Black Bearded Saki (Chiropotes satanas) in the Fragmented Landscape of Eastern Amazonia
Bearded sakis are frugivores specialised for seed predation. The black bearded saki (Chiropotes satanas) is endemic to a densely populated and deforested area in eastern Amazonia in Brazil and is threatened with extinction. The principal objective of this study was to research the behaviour and ecology of two groups of black bearded sakis living under differ
Publicado em: 2006
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21. Associations between jumping spiders (Salticidae) and Bromeliaceae / Associações entre aranhas Salticidae e Bromeliaceae : historia natural, distribuição espacial e mutualismos
The understanding of the interactions between arthropods and plants has grown considerably in the last few years. Although the spiders are among the most abundant arthropod group and compose the main predator guild on vegetation, there exist very few studies involving spiders and plants. Here, we report information showing that some salticid species are stri
Publicado em: 2005
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22. DispersÃo e predaÃÃo de grandes sementes por Sciurus aestuans L. em fragmentos de floresta AtlÃntica montana no Estado do EspÃrito Santo, Brasil
The plantâdispersor interactions influence the adaptive values of plants and animals, acting directly on the reproductive characters of plant species and life histories of animal species. The fruvigory pattern influences the seed shadow patterns of plants, the predation rates by invertebrates and consequently the germination, seedling survival and adult rec
Publicado em: 2004
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23. Polinização e qualidade de sementes produzidas por Pychotria tenuinervis (Rubiaceae) em fragmentos de Mata Atlantica : efeito da distancia de bordas antropicas e naturais
Spatial and temporal climatic variability among areas may affect the reproductive events of plant and animal populations. Habitat changes or abrupt limits between habitats can affect the interactions between plants and their pollen and seed vectors and lead to a decrease in seed quality because of increased inbreeding. The isolation of forest patches and the
Publicado em: 2004
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24. Caracterização de genes de Arabidopsis thaliana e Saccharum spp envolvidos na resposta ao frio e oxido nitrico
Nitric oxide (NO) is a reactive nitrogen species relatively unstable that has great versatility. NO acts as a secondary messenger and may be even cytotoxic, depending on its concentration. Actions of the NO as secondary messenger have been described in neurotransmission, regulation of the blood circulation and inflammatory processes mainly in mammals where t
Publicado em: 2004