Hydrobiology in the Cabo Frio (Brazil) upwelling: two-dimensional structure and variability during a wind cycle
- J. Valentin, Dalmo Lacerda Andre, Salvador Abdala Jacob
- Environmental Science, Geography
- 1987
The Cabo Frio Upwelling System, Brazil
- J. Valentin
- Environmental Science
- 2001
Upwelling processes are most common and most intense on the eastern side of the Atlantic and Pacific oceans. The Cabo Frio upwelling system (23°S, 42°W) is an anomaly in that it is on the west side…
Upwelling and downwelling at Cabo Frio (Brazil): comparison of biomass and primary production responses
- E. Gonzalez-Rodriguez, J. Valentin, Dalmo Lacerda Andre, Salvador Abdala Jacob
- Environmental Science
- 1992
Total mercury in muscle tissue of five shark species from Brazilian offshore waters: effects of feeding habit, sex, and length.
- Alexandra Penedo de Pinho, J. R. Davée Guimarães, A. Martins, P. Costa, G. Olavo, J. Valentin
- Environmental ScienceEnvironmental Research
- 1 July 2002
Results indicate that feeding habits influence total mercury level in sharks, and mercury levels were generally higher in males than in females for all species (with the exception of S. mitsukurii), but a statistically significant correlation was observed only for M. canis.
Environmental and Sanitary Conditions of Guanabara Bay, Rio de Janeiro
- Giovana O. Fistarol, F. Coutinho, F. Thompson
- Environmental ScienceFrontiers in Microbiology
- 20 November 2015
An overview of the current environmental and sanitary conditions of Guanabara Bay is presented, a consequence of all these decades of impacts, focusing on microbial communities, how they may affect higher trophic levels of the aquatic community and also human health.
Dynamic of decapod crustacean larvae on the entrance of Guanabara bay
- L. Fernandes, S. Bonecker, J. Valentin
- Environmental Science, Biology
- 1 December 2002
Among the decapod larvae collected, portunids and grapsids were the most abundant, especially during nocturnal ebb tides and near the surface, and Luciferid (Lucifer faxoni) was the only group with high densities during flood tides, suggesting this is an evidence of L. faxoni larvae entering Guanabara Bay in late winter.
Factors influencing spatial patterns of molluscs in a eutrophic tropical bay
- Raquel A. F. Neves, C. Echeverría, L. A. Pessoa, P. Paiva, R. Paranhos, J. Valentin
- Environmental ScienceJournal of the Marine Biological Association of…
- 21 September 2012
Samples were collected from 10 stations distributed through three sectors in Guanabara Bay during two consecutive years, in order to determine factors that influence the spatial pattern of molluscs…
Dynamics of bacterial carbon metabolism at the entrance of a tropical eutrophic bay influenced by tidal oscillation
- M. Guenther, R. Paranhos, C. Rezende, E. Gonzalez-Rodriguez, J. Valentin
- Environmental Science
- 31 January 2008
Although the magnitude of carbon flow through the bacterioplankton was highly variable, there were nevertheless consistent differences between layers, highlighting the importance of short-term variations incarbon flow through bacteria for understanding the carbon cycle of estuarine systems.
Penilia avirostris (Crustacea, Ctenopoda) in a tropical bay: variations in density and aspects of reproduction
- A. Marazzo, J. Valentin
- Environmental Science, Biology
- 1 May 2003
Bacterial Abundance and Production in the Southwest Atlantic Ocean
- L. Andrade, A. Gonzalez, J. Valentin, R. Paranhos
- Environmental ScienceHydrobiologia
- 2004
Edies showed by bacterial data can probably sustain the fisheries resources for the whole area and the influence of gradients across eddies on biological activity and food chain structure should be an important question to be studied in oligotrophic oceans.
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