Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1843 résultats pour les termes de recherche: phanérogames marines OR herbier

Affichage des résultats: 471 à 480

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Herbivorous fishes and the potential of Caribbean marine reserves to preserve coral reef ecosystems

1. The development of macroalgae to the detriment of corals is now one of the major threats to coral reefs. Herbivorous fishes are partly responsible for algal regulation on coral reefs and their overexploitation favours the shift from scleractinian ...

A model-based evaluation of Marine Protected Areas: the example of eastern Baltic cod (Gadus morhua callarias L.)

The eastern Baltic cod stock collapsed as a consequence of climate-driven adverse hydrographic conditions and over fishing and has remained at historically low levels. Spatio-temporal fishing closures [Marine Protected Areas (MPAs)] have been impleme...

Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part II: Two interacting turbines

The future implantation of second generation marine current turbine arrays depends on the understanding of the negative interaction effects that exist between turbines in close proximity. This is especially the case when the turbines are axially alig...

Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part I: One single turbine

The ambient turbulence intensity in the upstream flow plays a decisive role in the behaviour of horizontal axis marine current turbines. Experimental trials, run in the IFREMER flume tank in Boulogne-Sur-Mer (France) for two different turbulence int...

Numerical and experimental characterisation of interactions between two marine current turbines

The implantation and deployment of marine current turbine arrays depend on the understanding of their interactions. Based on a priori suggestions about the layout of marine energy converter arrays, we propose to highlight interactions effects between...

Are planktonic larvae of marine benthic invertebrates too scarce to compete within species?

Several models for the evolution of complex life histories have assumed a carrying capacity for both larval and postlarval stages. In addition, the densities of larvae in laboratory experiments are often so high that there is competition for food. Pu...

Naturally occuring somatostatin and vasoactive intestinal peptide inhibitors : isolation of alkaloids from two marine sponges

INVERTEBRE AQUATIQUE;SUBSTANCE NATURELLE;INTERET PHARMACOLOGIQUE;ACTIVITE BIOLOGIQUE;ALCALOIDE;EPONGE;SPONGIAIRE;PEPTIDE

Comparaison des peuplements de poissons marins des récifs frangeants de trois îles océaniques de l'Indo-Pacifique (La Réunion, Moorea et la Nouvel...

POISSON MARIN;RECIF FRANGEANT;ETUDE COMPARATIVE;ILE

Callipeltoside A : a cytotoxic aminodeoxy sugar-containing macrolide of a new type from the marine Lithistida sponge Callipelta sp.

INVERTEBRE AQUATIQUE;SUBSTANCE NATURELLE;INTERET PHARMACOLOGIQUE;STRUCTURE CHIMIQUE;CALLIPELTOSIDE A;EPONGE;SPONGIAIRE

Callipeltins B and C : bioactive peptides from a marine Lithistida sponge Callipelta sp.

INVERTEBRE AQUATIQUE;SUBSTANCE NATURELLE;INTERET PHARMACOLOGIQUE;STRUCTURE CHIMIQUE;CALLIPELTINE;PEPTIDE;EPONGE;SPONGIAIRE