Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1266 résultats pour les termes de recherche: hydroélectricité OR production hydoélectrique

Affichage des résultats: 51 à 60

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Importance comparée des biomasses et productions bactérienne et primaire planctoniques et leurs relations avec les variables physico-chimiques dans ...

LAGON;FONCTIONNEMENT DE L'ECOSYSTEME;BIOMASSE;PRODUCTION PRIMAIRE;EUTROPHISATION;BACTERIE;PHYTOPLANCTON;NUTRIMENT;RELATION TROPHIQUE;FACTEUR ANTHROPIQUE;GRADIENT TROPHIQUE

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...

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

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-...

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...

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...

Plankton biomass and production in an open atoll lagoon: Uvea, New Caledonia

PLANCTON;PHYTOPLANCTON;ZOOPLANCTON;BIOMASSE;PRODUCTION PRIMAIRE;ATOLL;LAGON

Test et application d'un protocole de suivi de la fréquentation plaisancière du lagon du Grand-Nouméa pour la production d'indicateurs de pressi...

Le travail présenté dans ce rapport a consisté à tester un protocole de suivi de la fréquentation plaisancière, à quantifier et identifier la répartition spatiale des usagers par l'intermédiaire d'indicateurs afin d'estimer les risq...

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...