Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1268 résultats pour les termes de recherche: hydroélectricité OR production hydoélectrique

Affichage des résultats: 491 à 500

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Toxic factors of Vibrio strains pathogenic to shrimp

Vibriosis is a major disease problem in shrimp aquaculture. 'Syndrome 93' is a seasonal juvenile vibriosis caused by Vibrio penaeicida which affects Litopenaeus stylirostris in grow-out ponds in New Caledonia. This study assessed the toxic activities...

Floating cages as an experimental tool for shrimp culture studies: first attempts to check their reliability

The first aim of this study was to evaluate on a technical basis the rearing of shrimps in floating cages set up in earthen ponds. Shrimps reared in and outside the cages presented comparable growths and survival rates. Then it was concluded that shr...

Principe de facilitation appliqué à la restauration écologique de sites miniers dégradés. Suivi des communautés ectomycorhiziennes en cours de s...

Acacia spirorbis est une espèce endémique de la Nouvelle-Calédonie, capable de former des symbioses avec des microorganismes du sol, notamment des ectomycorhizes et de se développer sur une très large variété de sols. Afin de tester les capaci...

Pathogenicity of Vibrio penaeicida or white shrimp Litopenaeus vannamei: a cysteine protease-like exotoxin as a virulence factor

The pathogenicity of Vibrio penaeicida Strains KH-1 and AM101, their culture-free supernatant (CFS), and their protein fraction obtained by 40% of ammonium sulfate precipitation (PFs40) were assessed in experimental challenges against juvenile Litope...

Vallitalea pronyensis sp nova, isolated from a marine alkaline hydrothermal chimney

A novel thermotolerant, anaerobic, Gram-stain-positive, spore-forming bacterium was isolated from a hydrothermal chimney in Prony Bay, New Caledonia. This strain, designated FatNl3(T), grew at 15-55 degrees C (optimum 30 degrees C) and at pH 5.8-8.9 ...

Late Holocene sea-level change and reef-island evolution in New Caledonia

In New Caledonia, numerous rays are distributed on platform reefs in the southwest lagoon behind the barrier reef. At Mba Island, a vegetated sand cay in this area, we examined Holocene sea-level change, and reef development and evolution. The late H...

Etude de la diversité génétique chez Santalum austrocaleclonicum de Nouvelle-Calédonie par la technique random amplified polymorphie DNA(RAPD)

Le santal, petit arbre répandu dans l'aire pacifique s'étendant de l'Inde à l'Amérique du sud, est réputé pour l'huile essentielle obtenue par distillation de son bois de coeur. Cette substance utilisée dans de nombreux produits (encens, ongue...

Systèmes d'exploitation en pêche côtière ; méthode d'étude et application au cas des Pertuis

This report presents a functional typology of the exploitation systems of fisheries in the Charentais sounds. It describes the nature of such a typology as well as the method developed in relation to the topic of the study. The determination and form...

Modélisation en 3D du bassin d'essais d'engins de pêche de la station de Lorient

3D modelling of the fishing gear flume tank at IFREMER's Lorient site Within the framework of their training, it is suggested that students in their first year of the "Industrial Product Design" BTS (vocational training certificate) at the Colbert de...

Colonization and release processes of viruses and prokaryotes on artificial marine macroaggregates

Marine organic aggregates are sites of high of viral accumulation; however, still little is known about their colonization processes and interactions with their local bacterial hosts. By taking advantage of a novel approach (paramagnetic functionaliz...