Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1271 résultats pour les termes de recherche: hydroélectricité OR production hydoélectrique

Affichage des résultats: 71 à 80

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Bases biologiques de la production de deux Mollusques d'intérêt économique: reproduction chez Megathura crenulata, reproduction et développement c...

The reproductive cycle of Megathura crenulata was documented and quantification of oocyte lipid reserves with lipo-specific stains was explored in both this species and in Crassostrea gigas. The necessity of providing food to female broodstock C. gi...

Heterotrophic bacterial production and metabolic balance during the VAHINE mesocosm experiment in the New Caledonia lagoon

Studies investigating the fate of diazotrophs through the microbial food web are lacking, although N-2 fixation can fuel up to 50% of new production in some oligotrophic oceans. In particular, the role played by heterotrophic prokaryotes in this tran...

Nitrogen isotopic evidence for a shift from nitrate- to diazotroph-fueled export production in the VAHINE mesocosm experiments

In a coastal lagoon with a shallow, 25 m water column off the southwest coast of New Caledonia, large-volume (similar to 50 m(3)) mesocosm experiments were undertaken to track the fate of newly fixed nitrogen (N). The mesocosms were intentionally fer...

Aquaculture des crevettes Peneides tropicales. Etat actuel de la production dans le monde et perspectives de recherche 1989-1993

This document presents the current state of the development of the shrimp pénéides aquiculture in the world. It draws up the assessment of the know-how of group IFREMER-FA and presents the research orientations to be implemented during the medium-...

Biomass and production of two Halimeda species in the southwest new caledonian lagoon

Two algal communities on unconsolidated sand, dominated by two Caulerpa populations, were studied in the southwestern New Caledonian lagoon. Biomass, growth rates and production were measured at two stations over one year. Biomass and growth rate of ...

Production of feeds to support shrimp farming in Tahiti (french Polynesia)

Shrimp production mainly of Macrobrachium rosenbergii but also of peneids is now starting on a commercial basis in Tahiti. This production is sustained by conjugated efforts of Service de l'économie Rurale, Office de la Recherche et des Ressources O...

Renforcement des capacités de production des centres techniques aquacoles : Fiche finale de capitalisation Pêche 5B2

2025. Renforcement des capacités de production des centres techniques aquacoles : Fiche finale de capitalisation Pêche 5B2. Noumea, New Caledonia : Pacific Community. 6 p.

Rapport de production - Détection automatique de surfaces brûlées - Amélioration de la chaîne des feux existante

Afin de caractériser finement les incendies et leurs impacts environnementaux, l'OEIL (Observatoire de l'Environnement en Nouvelle-Calédonie) a mis en place en 2017 une chaîne de traitement automatisé permettant d'extraire les surfaces brûlées ...

The use of photosynthesis inhibitor (DCMU) for in situ metabolic and primary production studies on soft bottom benthos

A selective chemical photosynthesis inhibitor, DCMU (Dichorophenyl-dimethylurea), dissolved in DMSO (Dimethyl sulfoxide) was substituted for the dark incubation method commonly used to measure the oxygen consumption in metabolic and primary productio...

A simple and rapid device for measuring planktonic primary production by in situ sampling, and 14C injection and incubation

A system (LET GO) is described that enables measurements of primary production at sea after #in situ$ incubation, with 14C being injected at depth immediately after enclosure of the sample. Each incubation cell, about 200 ml, is made of two transpare...