Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1578 résultats pour les termes de recherche: Fuite acide avril 2009

Affichage des résultats: 841 à 850

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Pollution sonore

La pollution sonore regroupe les nuisances occasionnées par différentes sources de bruit. En Nouvelle-Calédonie, il s'agit essentiellement des bruits provoqués par les activités industrielles (usines, extraction minière) et par les engins motor...

Foraminiferal assemblages: tools for assessment of shrimp pond conditions

Meiofauna is a functional group made of small benthic metazoans 45 to 500µm in size. Although protista, foraminifera living in this kind of environment are often put in to the meiofauna. Meiofauna has been studied in New Caledonia for its double rol...

Detection of shrimp pathogen Vibrio nigripulchritudo in sediments of a New-Caledonian grow-out pond during a drying period

Experimental infections together with epidemiological studies have shown that pathogenic and non‐pathogenic isolates of V. nigripulchritudo co‐existed in shrimp farm environment (2, 3). Moreover, obtained results also demonstrated that the “sum...

Three years of experimental and applied research on the use of dietary probiotic Pediococcus acidilactici in shrimp culture : overview of the main res...

In recent years the biological control of diseases by environmental friendly methods such as probiotics has become an important subject of investigation in aquaculture research. Probiotics are live microorganisms which when administrated in adequate ...

A model-based evaluation of Marine Protected Areas: the example of eastern Baltic cod (Gadus morhua callarias L.)

The eastern Baltic cod stock collapsed as a consequence of climate-driven adverse hydrographic conditions and over fishing and has remained at historically low levels. Spatio-temporal fishing closures [Marine Protected Areas (MPAs)] have been impleme...

Optimisation de l’incubation du Paraha peue (Platax orbicularis)

L’objectif de ce travail est la définition d’une méthode d’incubation des oeufs de platax orbicularis garantissant une estimation plus précise et plus sûre du nombre d’animaux réalisée au démarrage des élevages larvaires Afin de pouv...

Temperature, selective mortality and early growth in the short-lived clupeid Spratelloides gracilis

Six cohorts of the silver-stripe round herring Spratelloides gracilis, a fast-growing and short-lived tropical clupeid, were collected as juveniles and then as adults during austral summers from November to February in 1998–1999 and 1999–2000, us...

Nutrient and microbial dynamics in eutrophying shrimp ponds affected or unaffected by vibriosis

A field survey was conducted on two intensive shrimp farms using similar technical practices: one (DF) historically affected by a vibriosis, the other (HC) in which the pathogen has been observed although no mortality event has occurred. Because hist...

The impact of easily oxidized material (EOM) on the meiobenthos: Foraminifera abnormalities in shrimp ponds of New Caledonia; implications for environ...

This study was carried out in shrimp ponds from New Caledonia, in order to determine the cause of the exceptional proportion of abnormal tests (FAI) (often >50%, sometimes >80%). FAI was positively correlated to the quantity of easily oxidized materi...

Shelled Molluscs

Shelled molluscs are comprised of bivalves and gastropods. They are settled mainly on the continental shelf as benthic and sedentary animals due to their heavy protective shell. They can stand a wide range of environmental conditions. They are found ...