3 Trophic Level
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Mercury and methylmercury in carapace of the marine turtle Caretta caretta, in northeastern Brazil and its potential for environmental monitoring
Abstract: The present work tests the use of carapace fragments of the marine turtle Caretta caretta as a tool for environmental biomonitoring of mercury (Hg) and to evaluate the influence of biological and ecological factors in Hg concentrations. Samples of carapace fragments were obtained during the nesting season of 2012 and 2016 and were analyzed for thei
An. Acad. Bras. Ciênc.. Publicado em: 10/07/2019
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2. Interação trófica entre Podisus nigrispinus e Supputius cincticeps (Heteroptera: Pentatomidae) / Trophic interaction between Podisus nigrispinus and Supputius cincticeps (Heteroptera: Pentatomidae)
Prey may be more or less consumed by control biologic agents and presents three kinds of interspecific interactions, (1) synergism, increase of mortality of prey comparing to each natural enemy independently, when the foraging of one species facilitates the capture of pest by another natural enemies. (2) Total mortality of the pest to natural enemies equals
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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3. Bioconcentração e biomagnificação de metilmercúrio na baía de Guanabara, Rio de Janeiro
Methylmercury was determined in water and aquatic biota from Guanabara Bay. Trophic transfer of methylmercury was observed between trophic levels from prey (microplankton, mesoplankton and fish with different feeding habits) to top predator (pelagic demersal fish). Top predator fish presented the highest methylmercury concentrations (320.3 ± 150.7 mg kg-1 d
Química Nova. Publicado em: 2011
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4. Estrutura e interações tróficas em três lagoas marginais no Pantanal Sul / Structure and trophic interactions in three lagoons in the southern Pantanal
Neste trabalho, as interações tróficas e os fluxos de energia/matéria de três lagoas marginais do Pantanal (MS) submetidas ao pulso de inundação anual - Baía da Onça, Braço Morto Acima e Braço Morto Abaixo - foram analisados com modelos de balanço de massas elaborados no software Ecopath. Assim, os objetivos foram: (i) descrever os mecanismos que
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2010
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5. Estrutura e interações tróficas em três lagoas marginais no Pantanal Sul / Structure and trophic interactions in three lagoons in the southern Pantanal
Neste trabalho, as interações tróficas e os fluxos de energia/matéria de três lagoas marginais do Pantanal (MS) submetidas ao pulso de inundação anual - Baía da Onça, Braço Morto Acima e Braço Morto Abaixo - foram analisados com modelos de balanço de massas elaborados no software Ecopath. Assim, os objetivos foram: (i) descrever os mecanismos que
Publicado em: 2010
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6. Levantamento florístico e produtividade de macrófitas aquáticas ocorrentes em ambientes limnéticos do Estado de Pernambuco Brasil
A wide variety of aquatic macrophytes can be found on the banks of rivers or reservoirs (sluices and dams). They are important components of these ecosystems, consisting of stock portion of energy and matter in the first trophic level. However, due to the changed environment, some species begin to develop dense infestations,promoting a series of losses, and
Publicado em: 2009
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7. DIETA DO GAVIÃO-REAL Harpia harpyja (Aves: Accipitridae) EM FLORESTAS DE TERRA FIRME DE PARINTINS, AMAZONAS, BRASIL
This study analyzed the diet of the Harpy Eagle (Harpia harpyja), including the influences of seasonality and land cover (forest vs. deforested) in a 3 km buffer around nests, and the frequency of occurrence and biomass of prey delivered to nestlings and fledglings. The nests were located in areas of lowland forest in settlements of Villa Amazônia (INCRA).
Publicado em: 2007
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8. Limnologia da barragem de acauã e codeterminantes socioeconômicos do seu entorno : uma nova interação do limnalogo com sua unidade de estudo
The main objective of this dissertation is to describe the limnological co-determinatives variations in temporal (monthly) and spatial (vertical/horizontal) scales of the Acauã reservoir by diagnosing its current trophic state. Monthly samples were collected and analyzed between August 2004 and July 2005. They were collected in six different regions of the
Publicado em: 2006
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9. Aspectos limnológicos e sanitários de uma lagoa costeira no litoral leste do Ceará - lagoa do Batoque / Limnological and sanitary aspects of a coastal lagoon in the eastern coast of Ceará lagoa do Batoque
The water quality of Batoque lagoon, a coastal lagoon located along the eastern shoreline of the state of Ceará, Brazil, was characterized by means of monthly samplings from May to November 2005 to obtain dry-season (May-Jun) and wet-season (Aug-Nov) data. Additionally, two nycthemeral (24hr.) samplings were performed in July and December to observe daily v
Publicado em: 2006
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10. Extracts of Azadirachta indica and Melia azedarach seeds inhibit folliculogenesis in albino rats
The seed oil of Azadirachta indica A. Juss (neem) is used in traditional medicine for its antidiabetic, spermicidal, antifertility, antibacterial, and wound healing properties. The present study was undertaken to investigate the quantitative aspects of follicular development in cyclic female albino rats (135 ± 10 g; 8 groups with 6 animals in each group) af
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-06
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11. VariaÃÃo temporal da meiofauna e da nematofauna em uma Ãrea mediolitorÃnea da bacia do Pina (Pernambuco, Brasil)
The basin of Pina has been studied for many years in order to check the level of organic pollutants. Many rivers are discharged in this basin bringing a big amount of pollutants to it. This affects the quality of organisms fished by the poor population that lives in the neighborhood. Up to now thereâs only one studie on meiofauna, specifically on nematofaun
Publicado em: 2003
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12. Fatores que influenciam na produtividade dos oceanos: a importÃncia do fluxo de difusÃo dos nutrientes para a biomassa do fitoplÃncton na regiÃo oceÃnica do nordeste brasileiro
In the tropical oceanic region the phytoplankton primary biomass is controlled by light availability and inorganic dissolved nutrients, besides other physical factors as turbulence and sedimentation. The water properties in the photic zone are subjected by a number of different forcing intensities opposite to the deeper waters which varies regularly. In Nort
Publicado em: 2003