Jean Louis Valentin

ORCID: 0000-0002-1221-3914
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About
Contact & Profiles
Research Areas
  • Marine and coastal ecosystems
  • Marine Biology and Ecology Research
  • Marine and fisheries research
  • Coastal and Marine Management
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Coral and Marine Ecosystems Studies
  • Fish biology, ecology, and behavior
  • Ichthyology and Marine Biology
  • Marine Bivalve and Aquaculture Studies
  • Microbial Community Ecology and Physiology
  • Marine Toxins and Detection Methods
  • Isotope Analysis in Ecology
  • Marine and coastal plant biology
  • Water Quality and Pollution Assessment
  • Fish Ecology and Management Studies
  • Fish Biology and Ecology Studies
  • Crustacean biology and ecology
  • Marine and Offshore Engineering Studies
  • Vibrio bacteria research studies
  • Coastal wetland ecosystem dynamics
  • Ocean Acidification Effects and Responses
  • Environmental Toxicology and Ecotoxicology
  • Marine Invertebrate Physiology and Ecology
  • Geography and Environmental Studies
  • Heavy metals in environment

Universidade Federal do Rio de Janeiro
2016-2025

Fundação Instituto de Pesca do Estado do Rio de Janeiro
2017

Instituto de Estudos do Mar Almirante Paulo Moreira
1984-1993

Brazilian Naval School
1984

Journal Article Upwelling and downwelling at Cabo Frio (Brazil): comparison of biomass primary production responses Get access Eliane Gonzalez-Rodriguez, Gonzalez-Rodriguez Institute de Estudos do Mar Almirante Paulo Moreira Rua Kioto 253, 28.910, Arraial Cabo, Rio Janeiro, Brazil Search for other works by this author on: Oxford Academic Google Scholar Jean Louis Valentin, Valentin Dalmo Lacerda André, André Salvador Abdala Jacob Plankton Research, Volume 14, Issue 2, 1992, Pages 289–306,...

10.1093/plankt/14.2.289 article EN Journal of Plankton Research 1992-01-01

Structuring of bacterioplanktonic populations and factors that determine the structuring specific niche partitions have been demonstrated only for a limited number colder water environments. In order to better understand physical chemical biological parameters may influence bacterioplankton diversity abundance, we examined their productivity, abundance in second largest Brazilian tropical bay (Guanabara Bay, GB), as well seawater GB. The inner location with higher nutrient input favored...

10.1371/journal.pone.0031408 article EN cc-by PLoS ONE 2012-02-21

Samples were collected from 10 stations distributed through three sectors in Guanabara Bay during two consecutive years, order to determine factors that influence the spatial pattern of molluscs and describe structure composition this community a eutrophic estuarine system on Brazilian coast. Although only one species, gastropod Heleobia australis , comprised 77% mollusc abundance, 59 species identified bay. In addition H. other dominant: Anachis isabellei bivalves Americuna besnardi Ervilia...

10.1017/s0025315412001105 article EN Journal of the Marine Biological Association of the United Kingdom 2012-09-21

Studies were carried out to find qualitative and quantitative temporal variations in fish larvae relate seasonal, diurnal tidal cycles the density of larvae. Sampling was performed at one station, during two three-day periods September 1995 March 1996. Samples collected ebb flood tides,in oblique hauls using a bongo net 500 µm mesh size. A total 42 taxa identified. The families Engraulidae (Cetengraulis edentulus, Anchoa lyolepis) Clupeidae (Harengula jaguana) had high mean densities...

10.1590/s1516-89132005000100016 article EN cc-by-nc Brazilian Archives of Biology and Technology 2005-01-01

On some zooplankters common in the Cabo Frio (Brazil) upwelling. In waters off zooplankton maxima are observed between February and April, which is period of upwelling occurrence. Copepods highly diversified; we identified 96 species at a single collecting station during one year. summer Calanoides carinatus, Paracalanus parvus Oncea media abundant, whereas dominance Temora stylifera, Clausocalanus furcatus, C. arcuicomis, Oithona plumifera great quantity Creseis acicula winter. Chaetognatha...

10.1093/plankt/9.6.1195 article EN Journal of Plankton Research 1987-01-01

The present work aims to determine and analyse the distribution of individuals different size-classes southern stingray, Dasyatis americana , in distinct habitats at Fernando de Noronha Archipelago. stingrays were visually sampled, quantified described according a standard protocol through intensive search method during direct observations. relationships among various disc length (DL) classes their habitat features by correspondence analysis. A total 356 sampled. Individuals between 15 35 cm...

10.1017/s0025315409000058 article EN Journal of the Marine Biological Association of the United Kingdom 2009-04-20

A baía de Guanabara é um dos ecossistemas tropicais mais eutrofizados do mundo. Sua hidrobiologia varia segundo tutor temporal definido pelo verão chuvoso e duplo gradiente espacial, vertical horizontal condicionado pela influência da maré efluentes continentais. O impacto antrópico manifesta-se nas áreas internas por elevados teores em amônia (? 650 mM) fósforo 308 mM ) baixa transparência (

10.4257/oeco.1999.0701.02 article PT cc-by-nc Oecologia Brasiliensis 1999-01-01

In the present study, we observed seasonal variations in density of decapod larvae as well changes related to diurnal and tidal cycles. Among collected, portunids grapsids were most abundant, especially during nocturnal ebb tides near surface. The same results obtained late winter (September) summer (March). These demonstrated a flow from Guanabara Bay adjacent coastal waters. Luciferid (Lucifer faxoni) was only group with high densities flood suggest this is an evidence L. faxoni entering...

10.1590/s1516-89132002000600013 article EN cc-by-nc Brazilian Archives of Biology and Technology 2002-12-01

Bacterioplankton was studied in a large area of Southwest Atlantic Ocean between 13 and 25ºS 28 42ºW. Samples were collected 108 stations at 20 m depth. Bacteria enumerated by flow cytometry after nucleic acid staining with syto13 two subgroups differentiated: low content (LNA) high (HNA) bacteria. Total bacterial numbers varied from 0.37 to 5.53 10(5) cells mL-1. HNA represented 15 70% the total number while LNA 30 85%. Heterotrophic production determined incorporation tritiated leucine...

10.1590/s1517-83822007000200028 article EN Brazilian Journal of Microbiology 2007-06-01

Biodiversity assessment is a mandatory task for sustainable and adaptive management the next decade, long-term ecological monitoring programs are cornerstone understanding changes in ecosystems. The Brazilian Long-Term Ecological Research Program (PELD) an integrated effort model supported by public funds that finance studies at 34 locations. By interviewing compiling data from project coordinators, we assessed efforts, targeting biological groups scientific production nine PELD projects...

10.7717/peerj.14313 article EN cc-by PeerJ 2022-11-09
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