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Previous geoetic studies cooducted with migratory fish populatioos from dowostream of the Três Marias dam io the São Fraocisco River Basio (Brazil) have documeoted the occurreoce of populatioo structuriog, as reported for Brycon orthotaenia aod…

Coronaviruses (CoV) comprise a large group of emerging human and animal pathogens, including the highly pathogenic severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) strains. The…

The entire globe is facing challenging times, due to an invisible threat named Covid-19. This virus that has generated a worldwide health crisis is forcing all levels of administration to work in an environment of uncertainty and to cut access to…

Since the 1990’s, the Brazilian countryside has undergone profound transformations. Rural development ceased to have a purely productivist and economic character and added other dimensions such as environmental, social, political and cultural.…

O Estado do Pará (PA) é o segundo maior produtor de leite da Região Norte do Brasil, sendo de grande importância para a agricultura familiar regional. Objetivou-se com este estudo caracterizar os sistemas de produção de leite e o perfil…

This article analyzes the relationships between the family farmer cooperatives of small farmers, producing biodiesel industries and government regulators from the perspective of Transaction Cost Economics (TCE). As a theoretical framework we sought…

La compactación del suelo ha sido un factor que limita el desarrollo natural de las plantas. Este trabajo tuvo por objetivo evaluar lainfluencia de sistemas de uso y manejo del suelo sobre la resistencia mecánica a la penetración, en un suelo…

The urgency of the problems of designing and implementing research programs in modern education is determined by global transformations of the sociocultural and educational spheres around the world, caused by many reasons, but made visible as a…