Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 769 résultats pour les termes de recherche: étouffement des coraux

Affichage des résultats: 471 à 480

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Thematic mapping of reefs by processing of simulated SPOT satellite data : application to the Trochus niloticus biotope on Tetembia reef (New Caledoni...

Exploitation of Trochus niloticus is important for Pacific islanders. The shell yields valuable mother of pearl of wich 2.000 tons were exported from New Caledonia in 1978. Knowledge of the exploitable stock requires a good estimate of the surface ar...

La crépidule : identifier les mécanismes de sa prolifération et caractériser ses effets sur le milieu pour envisager sa gestion (Chantier : Rade d...

En 1999, le risque écologique encouru par les écosystèmes côtiers soumis à la prolifération de la crépidule, Crepidula fornicata, a été pleinement reconnu par la communauté scientifique nationale et internationale. Au niveau national, le Pr...

Correlation between detection of a plasmid and high-level virulence of Vibrio nigripulchritudo, a pathogen of the shrimp Litopenaeus stylirostris

Vibrio nigripulchritudo, the etiological agent of Litopenaeus stylirostris summer syndrome, is responsible for mass mortalities of shrimp in New Caledonia. Epidemiological studies led to the suggestion that this disease is caused by an emergent group...

Multiple cryptic species in the blue-spotted maskray (Myliobatoidei : Dasyatidae : Neotrygon spp.) : an update

Previous investigations have uncovered divergent mitochondrial clades within the blue-spotted maskray, previously Neotrygon kuhlii (Muller and Henle). The hypothesis that the blue-spotted maskray may consist of a complex of multiple cryptic species h...

Marine natural products from New Caledonia : a review

Marine micro- and macroorganisms are well known to produce metabolites with high biotechnological potential. Nearly 40 years of systematic prospecting all around the New Caledonia archipelago and several successive research programs have uncovered ne...

Harvesting effects on tropical invertebrate assemblages in New Caledonia

Despite the importance of invertebrate resources for Pacific coral reef islands, few studies have specifically addressed the effects of harvesting on invertebrate assemblages including targeted and non-targeted species. The impacts of recreational ha...

Decadal increase in the number of recreational users is concentrated in no-take marine reserves

In coastal areas, demographic increase is likely to result in greater numbers of recreational users, with potential consequences on marine biodiversity. These effects may also occur within Marine Protected Areas (MPAs), which are popular with recreat...

Marine reserves lag behind wilderness in the conservation of key functional roles

Although marine reserves represent one of the most effective management responses to human impacts, their capacity to sustain the same diversity of species, functional roles and biomass of reef fishes as wilderness areas remains questionable, in part...

A survey of fairy tern (Sterna nereis) breeding colonies in the southern lagoon, New Caledonia

The breeding success of Fairy Terns in New Caledonia is poorly known despite the species being considered nationally endangered. Between June and October 2004, we surveyed 22 islets and coral banks in the Southern Lagoon of New Caledonia at least onc...

Suivi environnemental - Premier semestre 2012 - MILIEU MARIN

La surveillance du milieu marin s'effectue sur la base de quatre groupes d'indicateurs physico- chimiques et biologiques détaillés dans les chapitres suivants : Indicateurs physico-chimiques de la qualité de l'eau de mer et de la structure de ...