Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 755 résultats pour les termes de recherche: coraux

Affichage des résultats: 51 à 60

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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 ...

Comparison of visual census and high definition video transects for monitoring coral reef fish assemblages

Monitoring fish and underwater habitats, particularly in and around marine protected areas (MPAs) requires non-destructive observation methods. This is generally achieved by divers conducting underwater visual censuses (UVC), but video-based techniqu...

Fish communities of Geyser and Zelee coral banks (Western Indian Ocean).

The ichtyofauna of Geyser and Zelee coral banks (north of Mozambique canal) was investigated in 1996, this work being the first quantitative study on this area. Quantitative data were collected on 11 stations (mean depth 18 m) by visual observations ...

Sustainability of exploited marine ecosystems through protected areas: A viability model and a coral reef case study

Overexploitation of marine resources remains a problem worldwide. Many works advocate for the use of marine reserves as a central element of future stock management in a sustainable perspective. In the present paper, we address the influence of prote...

Allelopathic interactions between the brown algal genus Lobophora (Dictyotales, Phaeophyceae) and scleractinian corals

Allelopathy has been recently suggested as a mechanism by which macroalgae may outcompete corals in damaged reefs. Members of the brown algal genus Lobophora are commonly observed in close contact with scleractinian corals and have been considered re...

Annual sediment primary production and respiration in a large coral reef lagoon (SW New Caledonia)

LAGON;RECIF CORALLIEN;SEDIMENT;PRODUCTION PRIMAIRE;RESPIRATION;BENTHOS;PHOTOSYNTHESE;METABOLISME;ECHANTILLONNAGE

Coral reef gorgonians of New Caledonia = Les gorgones des récifs coralliens de Nouvelle-Calédonie

INVERTEBRE AQUATIQUE;RECIF CORALLIEN;DESCRIPTION;CLE DE DETERMINATION;TAXONOMIE;TOXICITE;ECOLOGIE;NUTRITION;GORGONE

Length-weight relationship of fishes from coral reefs and lagoons of New Caledonia : an update

POISSON MARIN;RECIF CORALLIEN;LAGON;MANGROVE;ECHANTILLONNAGE;METHODE DE CAPTURE;ALLOMETRIE

Designing indicators for assessing the effects of marine protected areas on coral reef ecosystems: A multidisciplinary standpoint

The present paper aims at identifying and assessing indicators of the effects of Marine Protected Areas (MPAs) in coral reef regions, based on a bibliography review in ecology, economics and social sciences. First the various effects Studied within e...

Diazotrophs : a non-negligible source of nitrogen for the tropical coral Stylophora pistillata

Corals aremixotrophs: they are able to fix inorganic carbon through the activity of their symbiotic dinoflagellates and to gain nitrogen from predation on plankton and uptake of dissolved organic and inorganic nutrients. They also live in close assoc...