Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 217 résultats pour les termes de recherche: chlorophylle a

Affichage des résultats: 41 à 50

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Influence of plankton concentration on gametogenesis and spawning of the black lip pearl oyster Pinctada margaritifera in Ahe atoll lagoon (Tuamotu ar...

Pearl culture industry represents one of the dominant business sector of French Polynesia. However, it still entirely relies on unpredictable spat collection success. Our aim was to assess the influence of natural plankton concentration fluctuations ...

Evidence for mitigation of coral bleaching by manganese

Unprecedented mass coral bleaching events due to global warming and overall seawater pollution have been observed worldwide over the last decades. Although metals are often considered as toxic substances for corals, some are essential at nanomolar co...

Geographical variation in the foraging behaviour of the pantropical red-footed booby

While interspecific differences in foraging behaviour have attracted much attention, less is known about how foraging behaviour differs between populations of the same species. Here we compared the foraging strategy of a pantropical seabird, the red-...

Geographical variation in the foraging behaviour of the pantropical red-footed booby

While interspecific differences in foraging behaviour have attracted much attention, less is known about how foraging behaviour differs between populations of the same species. Here we compared the foraging strategy of a pantropical seabird, the red-...

Etat de référence du milieu marin du site de Thio

L'objectif de ce rapport d'expertise est d'établir un état de référence sur la zone de Thio autour du wharf utilisé par la SLN pour le chargement du minerai. L'objectif est d'établir l'état physico-chimique des eaux et des sédiments ...

Comparaison des méthodes et données d’analyses acquises dans le cadre du suivi du milieu marin de Vale Nouvelle-Calédonie - campagne d'août 2012

L'OEIL a pour mission de recueillir les données environnementales produites par les industriels, de les gérer et de les interpréter. Dans un souci d'intégrité et d'objectivité l'OEIL doit également effectuer des vérifications de la qualité s...

Les coraux auscultés par des scientifiques

Le corail est un animal sensible ! Depuis plusieurs années, les maladies coralliennes s'amplifient dans l'Océan Indo-Pacifique. Les causes de ces maladies sont multiples : champignons, parasites, virus, bactéries ou changement des facteurs environ...

Effect of water exchange on effluent and sediment characteristics and on partial nitrogen budget in semi-intensive shrimp ponds in New Caledonia

An experiment was conducted in six earthen ponds with 20 shrimps m(-2) Litopenaeus stylirostris (Stimpson) during the warm season in New Caledonia to study the dynamics of wastes in relation with water exchange rate (WER). The nitrogen budget was est...

Trichodesmium and other planktonic cyanobacteria in New Caledonian waters (SW tropical Pacific) during an El Nino episode

Contributions of filamentous and picoplanktonic cyanobacteria to the phytoplankton community structure were examined in New Caledonian waters during the 2001-2003 El Nino period at 2 ocean stations (Loyalty Channel and Santal Bay) and 1 coral-reef la...

Ultra-violet radiation has a limited impact on seasonal differences in the Acropora muricata holobiont

Environmental conditions are known to influence corals and their associated communities of microorganisms. However, our insights into the impacts of seasonal changes in ultraviolet radiation (UVR) on both coral physiology and microbiome remain very l...