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is study aims to provide data on the abundance and distribution of zooplankton related to oceanographic

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Tagelus divisus (SPENGLER, 1794) is a Psamobiidae bivalve of commercial value that inhabits shallow waters, buried in a sandy or sandy-muddy substratum. The present study analyzed the spatio-temporal distribution in an intertidal environment and some aspects of the population dynamics (recruitment) of that species in the Bay of Paranaguá (PR), for which two study places were established: St. I close to the access bars and St. II, in the medium section of the system, in which systematic collections were made, between abril/96 and outubro/97. Larger abundance of individuals was observed (juvenile) (p <0,05) in the more intern section of the estuary (St. II), of waters with mean salinity of 26 and of larger anthropic infl uence and, in the two places, preferential distribution in the higher tide levels, close to the Spartina belt. Larger recruitment rates were evidenced in the autumn and in the spring, following a reproductive pattern observed for several species of bivalve in the area.

Among the organisms that make up the marine holoplankton are species of Pteropods, Chaetognaths and Salps, which are widely distributed in oceanic areas and represent important predators of this ecosystem. A total of 105 samples were collected in 3 consecutive oblique tows of 5 minutes each at 30 m depth carried out in Admiralty Bay, King George Island, Antarctica, during the summer of 2009/2010. Twenty pteropods, 51 chaetognaths and 132 salps were recorded.

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As the most inhospitable continent on Earth, Antarctica has more than 90% of its territory covered with ice and contains around 70% of all potable water in the world. Its proximity to South America is especially relevant to Brazil, which includes it in the country’s strategic surrounding area. Furthermore, Antarctica is administered through an international regime based on a system of conventions and documents, which defined research activities as its fundamental purpose. The objective of this paper is to present the aspects of the Brazilian Antarctic Program (PROANTAR, in Portuguese), the main instrument of the national Antarctic policy, and the Brazil’s continued presence in the continent. In addition, this work aims to depict the importance of Antarctic activities to Brazil, considering not only strategic concerns, but also their relevance to national scientific research. Finally, it investigates PROANTAR’s budgetary elements, pointing out its current perspectives, and examines which directions public policies should take to contribute to the program’s continuity and strengthening.