Efeitos da tilápia do Nilo, Oreochromis niloticus, sobre a biomassa planctônica e a transparência da água ao longo de um gradiente de enriquecimento por nutrientes

The omnivorous filter-feeding fish, Nile tilapia (Oreochromis niloticus), can have negative effects on water quality enhancing the eutrophication process. These effects depend on the nutrient enrichment level in the water. We carried out a mesocosm experiment for five weeks in a tropical man-made lake in Brazil to test ifthe effects of tilapias depend on of the level of nutrient enrichment. The experiment lasted for 5 weeks and a factorial 2x5 experimental design was used where the presence and absence of tilapias were manipulated in combination to 5 different levels of nutrient load in a total of 10 treatments. A two way repeated measure ANOVA was performed to evaluate the effects of time (t), tilapia (F), nutrients (NP) and the interactions among these factors on: chlorophyll a, water transparency, total phosphorous, total nitrogen, N:P ratio, zooplankton biomass and phytoplankton biovolume. The tilapia effect was evident, but nutrient enrichment didn t have any effect on the variables analyzed. Tilapia decreased the water transparency, total zooplankton biomass, calanoid copepod biomass, nauplii copepod biomass and cladocerans biomass. On the other hand, tilapia had no effect on phytoplankton biovolume. This lack of effect on phytoplankton is probably due to tilapia grazing that may counteract the positive effect of tilapia on phytoplankton via trophic cascades and nutrient recycling. Hence, a reduction in tilapia stock would not be an effective way to reduce phytoplankton biomass and improve water quality

A política de redistribuição de renda por meio da transparência de benefícios monetários: uma análise do programa renda cidadã de Ourinhos da ótica dos beneficiários

Pós-graduação em Ciências Sociais - FFC

Second life e transparência pública: perspectivas para o compartilhamento de dados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Uso da Web na ampliação da transparência pública: análise de Conselhos de Alimentação Escolar de municípios paulistas

Pós-graduação em Ciência da Informação - FFC

A construção da confiança na América do Sul e os mecanismos de transparência militar

Pós-graduação em Relações Internacionais (UNESP - UNICAMP - PUC-SP) - FFC

Transparência e opacidade na seleção de estratégias de relativização no português

This paper aims at examining the hypothesis that the choice among the different strategies of relativization available in the Portuguese grammar is motivated by a lesser or greater degree of transparency between form and meaning, which implies, correlatively, lesser or greater degree of ease in cognitive processing. In addition, the lesser or greater degree of transparency allows to postulate a hierarchical ordering for the strategies in correspondence to a greater or a lesser degree of ease in cognitive processing.

Estratégias de relativização: transparência e opacidade

This paper aims at examining the hypothesis that the choice among the different strategies of relativization available in the Portuguese grammar is motivated by a lesser or greater degree of transparency between form and meaning, which implies, correlatively, lesser or greater degree of ease in cognitive processing. In addition, the lesser or greater degree of transparency allows to postulate a hierarchical ordering for the strategies in correspondence to a greater or a lesser degree of ease in cognitive processing.

Segredo, transparência e as perspectivas para a política externa democrática no Brasil

Pós-graduação em Ciências Sociais - FFC