Urea can be one of the major sources of nitrogen for phytoplankton, but little is known about its importance for corals. Experiments were therefore designed to assess the uptake rates of urea by the scleractinian coral Stylophora pistillata; 15N-urea was used to follow the incorporation of nitrogen...

Responses of the European flounder Platichthys flesus to the chemical stress in estuaries: load of contaminants, gene expression, cellular impact and growth rate

Articles

Estérine Evrard et al. (Mar, 2010)

Articles

European flounder responses to the chemical stress were assessed by a comparative approach on four estuaries displaying contrasted patterns of contamination. The contamination typology of the estuaries was investigated by individual measurements of contaminants in fish. Molecular and physiological r...

Nitrogen uptake and assimilation kinetics in Alexandrium minutum (Dynophyceae): effect of N-limited growth rate on nitrate and ammonium interactions

Articles

Jean-François Maguer et al. (2007)

Articles

Uptake and assimilation kinetics of nitrate and ammonium were investigated along with inhibition of nitrate uptake by ammonium in the harmful dinoflagellate Alexandrium minutum Halim at different nitrogen (N)-limited growth rates. Alexandrium minutum had a strong affinity for nitrate and ammonium (K...

Uptake of dissolved free amino acids by the scleractinian coral Stylophora pistillata

Articles

Renaud Grover et al. (Mar, 2008)

Articles

This study was designed to assess the importance of dissolved free amino acids (DFAA) as a nitrogen source for the scleractinian coral Stylophora pistillata. For this purpose, experiments were performed using (15)N-enriched DFAAs, and %(15)N enrichment was measured both in animal tissue and zooxanth...

Towards sustainable toursim in Tunisia : the case of the island of Djerba

Thesis

Abderraouf Dribek (Jun 25, 2012)

Thesis

Tourism is a significant resource for Tunisia. Its economic impacts on the country are considerable (6% of GDP and over 386 000 direct and indirect jobs in 2009). But today, the tourism sector is facing many difficulties. This thesis is part of a plan to boost tourism in Tunisia. It is structured in...