13c Abundance
Mostrando 1-12 de 184 artigos, teses e dissertações.
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1. Geochemical Investigation of Tar Balls Collected in a Brazilian Beach Using Biomarkers, Ni/V, δ13C Ratios and Ultra-High Resolution FT-ICR Mass Spectrometry
Representative tar balls collected in two distinct years (2012 and 2014) in a beach along the State of Bahia, northeastern Brazil, were geochemically characterized in order to identify correlations between them and investigate potential sources. Terpanes and steranes biomarkers (detected by gas chromatography coupled to mass spectrometry, GC-MS), carbon stab
J. Braz. Chem. Soc.. Publicado em: 2020-04
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2. Helminth parasites of Cichla ocellaris Bloch & Schneider, 1801 collected in the Jacaré-Pepira River, São Paulo state, Brazil
Abstract:Cichla ocellaris is native to the Amazon region. It is popularly known as tucunaré and is widely used for human consumption. It is difficult to breed in captivity due to its highly predatory habits, it is considered symbolic of sport fishing in Brazil. This study aimed to make a qualitative and quantitative survey of helminth parasites of C. ocella
An. Acad. Bras. Ciênc.. Publicado em: 13/05/2019
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3. Asilidae (Diptera) of two Atlantic Forest protected areas of Rio de Janeiro, Southeastern Brazil
ABSTRACT As few Asilidae inventories of Rio de Janeiro areas have been published, there are many data gaps. This paper aims to contribute to the knowledge of richness, abundance and distribution of this family in this State. From January 2013 to March 2014, insects were collected monthly using Malaise traps and every two months using entomological nets in th
An. Acad. Bras. Ciênc.. Publicado em: 23/04/2018
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4. Effect of Mineral Nitrogen on Transfer of 13C-Carbon from Eucalyptus Harvest Residue Components to Soil Organic Matter Fractions
ABSTRACT The amount of harvest residues retained in Eucalyptus plantations strongly influences soil organic matter (SOM), but the efficiency of conversion to SOM may vary according to the type of residue. This study evaluated the recovery of C from Eucalyptus residue components - leaves, bark, branches, roots, and a mix of all residues - in different SOM fra
Rev. Bras. Ciênc. Solo. Publicado em: 31/07/2017
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5. Abundance and distribution of Portunidae larval phases (Crustacea: Brachyura) in the estuarine and coastal region of the Patos Lagoon, southern Brazil
ABSTRACT: The abundance and distribution of larval phases of the Portunidae found in the estuary of the Patos Lagoon and the coastal region were studied during two years (1995 and 1999). A conical net (165 cm long, 60 cm mouth, and 330 µm mesh) equipped with a flowmeter was towed for three minutes at 2 knots at six stations within the estuary and four stati
Nauplius. Publicado em: 2015-12
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6. Reproductive studies of Anchoa marinii Hildebrand, 1943 (Actinopterygii: Engraulidae) in the nearby-coastal area of Mar Chiquita coastal lagoon, Buenos Aires, Argentina
The aim of the present study provides the first results on the reproductive biology of the anchovy, Anchoa marinii, in a nearby-coastal area of Mar Chiquita coastal lagoon, 37º32'00"S 57º19'00"W, Argentina. To perform this, we employed mainly female gonads, at both microscopic and macroscopic levels. The oocyte diameter distribution and the microscopy anal
Neotrop. ichthyol.. Publicado em: 2015-03
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7. Habitat use and abundance of goliath grouper Epinephelus itajara in Brazil: a participative survey
O desenvolvimento de estratégias de pesquisa para espécies ameaçadas é frequentemente limitado pelo acesso a indivíduos suficientes para adquirir informações necessárias para elaborar medidas de conservação adequadas. Dentre essas espécies, o mero (Epinephelus itajara) é um peixe recifal de grande tamanho, classificado globalmente como criticamen
Neotrop. ichthyol.. Publicado em: 2014-12
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8. Distribution and abundance of Pleuronectiformes larvae off Southeastern Brazil
O objetivo deste estudo foi descrever a composição, abundância, densidade, distribuição horizontal e vertical das larvas de Pleuronectiformes ao longo da plataforma continental Sudeste brasileira. As amostras foram coletadas na plataforma continental sudeste com redes bongô e Multi Plankton Sampler (MPS), no verão e inverno de 2002. Um total de 352 la
Braz. j. oceanogr.. Publicado em: 2014-03
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9. Maternal protein restriction affects gene expression and enzyme activity of intestinal disaccharidases in adult rat offspring
This study investigated the consequences of intrauterine protein restriction on the gastrointestinal tract and particularly on the gene expression and activity of intestinal disaccharidases in the adult offspring. Wistar rat dams were fed isocaloric diets containing 6% protein (restricted, n = 8) or 17% protein (control, n = 8) throughout gestation. Male off
Braz J Med Biol Res. Publicado em: 15/03/2013
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10. Interaction between Musca domestica L. and its predator Muscina stabulans (Fallén) (Diptera, Muscidae): effects of prey density and food source abundance
Interaction between Musca domestica L. and its predator Muscina stabulans (Fallén) (Diptera, Muscidae): Effects of prey density and food source abundance. The objective of this work was to evaluate the influence of prey density and food source abundance on the predatory behavior of Muscina stabulans over M. domestica. Three predator/prey proportions were ev
Rev. Bras. entomol.. Publicado em: 2013-03
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11. Abundance changes and activity flexibility of the oncilla, Leopardus tigrinus (Carnivora: Felidae), appear to reflect avoidance of conflict
We investigated the density and activity of the oncilla, Leopardus tigrinus (Schreber, 1775), a threatened small cat, in the Brazilian Atlantic Forest, using camera-trap data. We described differences in the activity of individuals occurring alone or in sympatry with larger cats. Oncilla presented low densities (7-13 ind./100 km²) and high flexibility in it
Zoologia (Curitiba). Publicado em: 2012-04
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12. Effects of host plants on distribution, abundance, developmental time and life table parameters of Oligonychus afrasiaticus (McGregor) (Acari: Tetranychidae)
A biologia e ecologia do ácaro da tamareira O. afrasiaticus foram estudadas através de inspeções regulares em oásis Tunisianos e observações em laboratório. Os resultados indicam que a data inicial da infestação dos frutos variou entre os anos e pelo tipo de variedade das tamareiras. Datas iniciais variaram entre a primeira e a terceira semana de j
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2012