Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 395 résultats pour les termes de recherche: rat OR Rattus rattus

Affichage des résultats: 91 à 100

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Prolifération d'espèces animales ou végétales

Une espèce, animale ou végétale, est dite envahissante lorsqu'elle prolifère et entre en concurrence avec les espèces natives. Elle prend alors la place des autres espèces et devient largement dominante, déséquilibrant tout l'écosystème. D...

Maturation and spawning in captivity of penaeid shrimps

As no indigenous species of commercial penaeid shrimp live in the waters of French Po1ynesia, the pre1iminary step in deve10ping shrimp aquaculture was to obtain maturation and spawning in captivity. Five species have been investigated. Wi1d-caught j...

Le développement socio-économique dans les DOM-TOM : état des lieux

The goal of this study was to provide economic data to align Ifremer's research programme with the global socio-economic context, which is the crux of this work. Although the economies of the French Overseas Departments and Territories are poorly und...

Phytoplankton dynamics in the southern New Caledonian lagoon during a southeast trade winds event

During the Echolag cruise (13 February-8 March 2007), the effect of 16-30 knot trade winds on abundance, community structure and dynamics of phytoplankton was investigated in the southern part of the New Caledonian coral reefs and surrounding oceanic...

Activité magmatique, tectonique et hydrothermale actuelle sur la Dorsale Est Pacifique entre17°-et 19°S(campagne NAUDUR)

The submersible-study of four segments of the East Pacific Rise between 17 degrees and 18 degrees 40'S, where the spreading rate is greater than 150 mm/a, allows us to confirm the variability of the accretion processes. The segment between 17 degrees...

Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part II: Two interacting turbines

The future implantation of second generation marine current turbine arrays depends on the understanding of the negative interaction effects that exist between turbines in close proximity. This is especially the case when the turbines are axially alig...

Physiological responses of female and male black-lip pearl oysters (Pinctada margaritifera) to different temperatures and concentrations of food

This study was designed to measure responses of four-year-old black-lip pearl oysters (Pinctada margaritifera) to different temperatures and food concentrations and to identify the energy requirements of each sex. Oysters were fed a monospecific micr...

Influence of plankton concentration on gametogenesis and spawning of the black lip pearl oyster Pinctada margaritifera in Ahe atoll lagoon (Tuamotu ar...

Pearl culture industry represents one of the dominant business sector of French Polynesia. However, it still entirely relies on unpredictable spat collection success. Our aim was to assess the influence of natural plankton concentration fluctuations ...

Small-scale FADs-associated fishing techniques used in the Pacific region

Over the last 16 years, the Secretariat of the Pacific Community (SPC - formerly the South Pacific Commission) has been developing and providing information on mid-water fishing techniques targeting the larger, deeper-swimming tunas that aggregate ar...

Effluents from land based marine farms: nature, treatment, valorisation, modelisation. Applications to fish and shrimp rearing

Fish culture (seabass, turbot...) on the French metropolitan coast, and shrimp culture in the overseas territories (essentially New Caledonia and Tahiti) are subject to a regular development through land based farms. Three thematic of research on aqu...