Influência da sazonalidade na infestação de Ergasilus turucuyus (Copepoda: Ergasilidae) em Acestrorhynchus falcirostris e Hemiodus unimaculatus (Osteichthyes: Characiformes) do Reservatório Coaracy Nunes, estado do Amapá, Brasil.

O presente estudo investigou a influência da sazonalidade na infestação de Ergasilus turucuyus nas espécies de peixe Acestrorhynchus falcirostris e Hemiodus unimaculatus do Reservatório Coaracy Nunes, Estado do Amapá, Norte do Brasil. Foram coletados 118 espécimes de hospedeiros, sendo 62 A. falcirostris e 56 H. unimaculatus nos períodos de estiagem (outubro de 2012 a fevereiro de 2013) e chuvoso (abril a agosto de 2013) As características físicas e químicas da água foram similares no período chuvoso e de estiagem. Apesar das diferenças nos níveis de precipitação pluviométrica entre períodos sazonais, os níveis de infestação por E. turucuyus foram similares durante a estação chuvosa e estiagem. Não houve infestação por ergasilídeos em H. unimaculatus no período chuvoso. A infestação branquial por E. turucuyus não influenciou o fator de condição de ambos os hospedeiros, independente do período sazonal. Este foi o primeiro estudo sobre sazonalidade de infestação por E. turucuyus

First study on infestation of Excorallana berbicensis (Isopoda: Corallanidae) on six fishes in a reservoir in Brazilian Amazon during dry and rainy seasons.

We analyzed the infestation levels of Excorallana berbicensis on Acestrorhynchus falcirostris, Ageneiosus ucayalensis, Geophagus proximus, Hemiodus unimaculatus, Psectrogaster falcata and Serrasalmus gibbus in a reservoir in the Araguari River basin, northern Brazil, during the dry and rainy seasons. For P. falcata, the infestation levels due to E. berbicensis were greater during the rainy season. For all the species studied, the peak parasite prevalence was in the month of highest rainfall levels and there were two peaks of parasite abundance: one in the month with highest rainfall level and the other in the month of transition from the rainy season to the dry season. In these hosts, around 70% of the E. berbicensis specimens were collected during the rainy season. The body conditions of the hosts also did not suffer any seasonal influence. Despite the differences in seasonal rainfall levels, there was no fluctuation in transparency, turbidity, pH, electric conductivity, temperature and dissolved oxygen levels in the water, due to the stability of these parameters during the seasonal cycle investigated in this artificial Amazon ecosystem. This was the first report on the seasonality of infestation by E. berbicensis associated with fish

Controle da malformação da mangueira em pomar comercial do município de Janaúba-MG.

O fungo sobrevive na planta, nos tecidos vivos ou mortos, principalmente nos órgãos infectados. Sua disseminação ocorre por ácaro, insetos e instrumentos de poda. Penetra na planta por ferimentos e contato das ferramentas contaminadas com a planta sadia. Temperaturas amenas favorecem seu desenvolvimento, que ocorre em diversas variedades, tornando-se evidente no período em que a planta emite suas brotações e/ou inflorescências

Entrepreneurship and well-being: the role of national entrepreneurship norm and the importance of meaningfulness at work

This study investigates whether entrepreneurship (operationalized as self-employment status) is related to higher levels of meaningfulness at work and individual’s well-being, specifically subjective vitality, when compared to regular employment. We propose that the impact of self-employment on meaningfulness at work would depend on countries’ normative context, namely on the national entrepreneurship prescriptive norm. We analysed 2010’s data from the Global Entrepreneurship Monitor and the European Social Survey on 16 European countries and tested a cross-level moderated mediation model. Results showed that entrepreneurship is positively related to individual’s well-being through the mediating effect of meaningfulness at work. However, the effect of entrepreneurship on individuals’ meaningfulness at work and, ultimately, on their subjective vitality, is stronger for people living in countries with less favorable national entrepreneurship norm. These findings provide evidence for framing meaningfulness at work as being contingent on the interaction between self-employment and national normative context and contribute to the literatures on entrepreneurship, meaningfulness, and well-being at workinfo:eu-repo/semantics/acceptedVersio

Manejo da mancha angular (Xanthomonas campestris pv. Mangiferae indica) na produção integrada de manga.

bitstream/CPATSA/33055/1/INT63.pd

Mechanisms and regulation of monosaccharide transport in suspension cultured cells of Vitis Vinifera

Apresentação efectuada no "14th Congress of the Federation of European Societies of Plant Biology", em Cracow, Polland em 2004.Fundação para a Ciência e a Tecnologia (FCT) - grant SFRH/BD/10689/2002

Grasping the dialogical nature of acculturation

In this interesting article, Andreouli (2013). Identity and acculturation: The case of naturalised citizens in Britain. Culture & Psychology, 19, 1–47) presents a dialogical perspective on acculturation. To support this perspective, the author integrates the Dialogical Self Theory and the Social Representations Theory. Drawing on her theoretical explanation, we develop a conceptual review focused on two pairs of constructs – social representations/I-positions and polyphasia/polyphonia. Andreouli’s empirical study allowed her to operationalize some critiques about the two-dimensional perspective and its strategies on acculturation. Nevertheless, it seems that the author ends up replicating a more conventional and dual way of thinking. Their results give us privileged access to the negotiation of meanings and activation of promoter signs or, in other words, to the dialogical dynamics between I-positions. In this respect, we suggest that the assumption of a more dialogic and semiotic lens could be an interesting further development to this study