Estudo de variações bioquímicas e genotoxicidade induzidas por mistura de contaminantes em tilápia (Oreochromis niloticus), como biomarcadores de contaminação ambiental

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Mananoligossacarídeo na alimentação de tilápia-do-Nilo (Oreochromis niloticus): avaliação de indicadores imunológicos, hematológicos, bioquímicos e de desempenho produtivo. Resposta ao desafio com Lactococcus garvieae

Pós-graduação em Microbiologia Agropecuária - FCAV

Enzimas de biotransformação em tilápia (Oreochromis niloticus) exposta ao hormônio natural 17b-estradiol

Among the sexual hormones the estrogens are receiving major attention due to their biological activity. Such biological response is atributed to the best conformation recognized by their receptors, resulting in maximum responses. The estrogens are also considered responsible for most of disruptor´s effects caused by their presence in aquatic ecosystems. The 17β-estradiol hormone is produced by vertebrates during the reproductive phase of their lives and its presence has been detected in superficial waters. The objective of this study was to evaluate the cause-effect of tilapia exposition to the hormone 17β-estradiol through the analysis of biotransformation enzymes in liver and gills, complemented with the quantification of 17β-estradiol and estrone in water samples collected from fish ponds integrated to swine production. The present study was conducted under laboratory conditions, in a randomized experimental design with three levels of 17β-estradiol (E2) (0, 5, 15 µg L-1), with three replicates. After 7 days of exposure time, liver and gills were extracted to analyze three isoforms of cytochrome P450: EROD, BROD, PROD and the activity of Glutathione S-Transferase (GST). The results showed that the EROD activity (CYP1A), normally induced by the metabolism of aromatic compounds, did not present statistical differences among the treatments exposed to E2, what means that the hormone did not induce isoform 1A in fish under these particular experimental conditions. PROD activity was significantly altered in both concentrations, by means of 5 and 15 µg L-1, when compared to control. This result can indicate an important role of PROD on the metabolism of E2 present in water. Regarding to the BROD activity, it could be observed differences statistically significant between control and both groups of treatments. Two or more CYP isoforms can contribute to the metabolism of the same compound, what makes BROD a candidate as a next bioindicator of the exposure to E2 in aquatic ecosystems. Analysis of variance could confirm the effect of E2 statistically significant on the GST activity in liver tissues with >90% of significance (Prob>F = 0.0753). Furthermore, it was possible to observe that the values of GSTs activities in liver and gills in both, control and treatments, follow a tendency, that means, enzymatic activity in gills increase as the increasing of the activity in the liver tissues. In this study, the 17β–estradiol was found in measurable concentrations in three sampled points, and these values were similar to the findings of other authors at different locations in Brazil. In addition, those values are much higher than the minimum concentration that presented observable effects (10 ng L-1).

Respostas metabólicas, morfologia do tecido muscular e expressão dos genes relacionados ao crescimento e à atrofia muscular durante o jejum e realimentação em juvenis de tilápia-do-Nilo

Pós-graduação em Zootecnia - FCAV

Qualidade de filés de tilápia alimentadas com pigmentante de origem bacteriana: Thiago Luís Magnani Grassi. -

Pós-graduação em Ciência Animal - FMVA

A norma-padrão Europeia e a mudança linguística na Escola Moçambicana

In Mozambique, the portuguese language is considered the official language, second language, national language and competes with more than twenty Bantu languages spoken by the majority of population. The standard norm lose away their floor to the Mozambican Portuguese which carries own characteristics pertaining to the sociolinguistic context of the country. Schools attempt their best, but they cannot teach the European standard due the multilingual and Portuguese contact with African languages, a fact that is reflected in the media and in the literature through their oral and written forms. These difficulties result in high rates of failures due to problems encountered in using the European standard by teachers and writers who prepare the school books. This research suggests the standardization of the Mozambican variant as well as the preparation of dictionaries and grammars illustrating the sociolinguistic reality of Mozambique in order to improve the quality of education. It also emphasizes the need for a self-esteem spirit on Mozambicans in general as a conduit to eliminate the soaring bias that Mozambicans can not speak portuguese language

Revisitações homoeróticas e sensibilidades pós-modernas na ficção de Guilherme de Melo

The aim of this essay is to offer a new angle on the novel A sombra dos dias [The shadow of the days] by Guilherme de Melo, published in 1981, stressing the homoerotic look on Mozambique's Colonial War and the Lourenço Marques society of the time, recreated her in another direction, revealing the scenarios and the behavior of that society. We propose a rereading of a not too distant past, which still has political and cultural effects on Portuguese society.

Imunomodulação por Actigen® em tilápia-do-nilo (Oreochromis niloticus): Respostas fisiológicas e desempenho produtivo após desafio com LPS

Pós-graduação em Ciência e Tecnologia Animal - FEIS

Transfigurações do passado em narrativas de Teolinda Gersão e Mia Couto

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Reversão sexual de tilápias gift criadas em hapas e submetidas a diferentes taxas de alimentação em alta frequência

Pós-graduação em Zootecnia - FMVZ

Desempenho produtivo e respostas hematológicas da Tilápia- do-Nilo submetida a diferentes níveis de proteína e condições de estresse

Pós-graduação em Zootecnia - FMVZ

O novo e o velho em Mia Couto: o outro pé da sereia

Mia Couto dans “O Outro Pé da Sereia” représente deux mondes: le monde d’aujourd’hui avec tous les effets de la mondialisation sur l’espace du Mozambique. Sous-jacents de ce monde la vie mystique vient la vie millénaire des africains avec sa religiosité mystique. Il’y a donc, dans le texte coutiano, l’ínteraction entre le deux opposés: l’ancien et le neuf.

The stream fish fauna from three regions of the Upper Paraná River basin

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Modelagem das trajetórias médias do peso vivo e do rendimento de carcaça de tilápias do Nilo (Oreochromis niloticus) por meio de funções B-spline

Employing the method of least squares and quadratic B-spline polynomials, different statistical models were tested to identify the most appropriate to model the mean trajectories of live weight and carcass yield of Nile tilapia (Oreochromis niloticus). Data of live weight (8,758) and carcass yield (2,042) of tilapias with ages between 106 and 245 days were obtained from 72 families derived from 36 males and 72 females. The sex and tank variables were considered as classificatory and the coefficients of quadratic polynomials B-spline of two to five intervals of the same size were used as covariables. According to most fit criteria used, the models with quadratic B-spline polynomial with five intervals of the same size presented the best adjustments. The increase in number of intervals of B-spline polynomial improved the fit of the polynomials to the data. The inclusion of classificatory effects from sex, tank, the interaction of these effects and the quadratic polynomial B-spline nested in this interaction indicated that, over time, each sex, grown in different tank, presented different mean trajectory, necessitating the inclusion of nesting time in the interaction sex x tank in order to avoid the under or overestimation of breeding values of the selection candidates in breeding programs of this species.

De mitos e silêncios: nas águas do feminino pelos romances de Paulina Chiziane

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)