Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1652 résultats pour les termes de recherche: Fuite acide avril 2010

Affichage des résultats: 881 à 890

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Can Ptilinopus greyii (Columbidae) disperse seeds in New Caledonia's dry forest ?

Conservation of endangered habitats of South Pacific islands is partially dependent on activity of seed dispersers. In consuming fruits, animals can spread seeds from parent plants to distant sites, thus contributing to plant regeneration and coloniz...

Swift sympatric adaptation of a species of cattle tick to a new deer host in New Caledonia

The occurrence and frequency of sympatric speciation in natural systems continue to be hotly debated issues in evolutionary biology. This might reflect the timescale over which evolution occurs resulting in there being few compelling observations of ...

Records of great white sharks (Carcharodon carcharias) in New Caledonian waters

The occurrence of great white sharks (Carcharodon carcharias) in New Caledonia is documented from 30 observation events (sightings or captures or forensic examination of wounds) made between 1943 and 2009, involving 34 individual sharks. Nine of the ...

Ultramafic soils from New Caledonia structure Pisolithus albus in ecotype

Isolates of ectomycorrhizal Pisolithus albus were sampled from both ultramafic and volcano-sedimentary soils in New Caledonia, a tropical hotspot of biodiversity, to investigate the relationships between genetic diversity and edaphic constraint throu...

A statistical algorithm for estimating chlorophyll concentration from MODIS data;Ocean remote sensing and monitoring from space

We propose a statistical algorithm to assess chlorophyll-a concentration ([chl-a]) using remote sensing reflectance (Rrs) derived from MODerate Resolution Imaging Spectroradiometer (MODIS) data. This algorithm is a combination of two models: one for ...

Stratégies de lutte contre la tique du bétail en Nouvelle-Calédonie. Synthèse des connaissances

La tique du bétail introduite sur le territoire en provenance d'Australie lors de la Seconde Guerre mondiale, constitue une des principales contraintes de l'élevage bovin. Elle génère des pertes économiques qui peuvent être insupportables pour ...

A new starting point for the South and Equatorial Atlantic Ocean

The opening of the Equatorial and South Atlantic Oceans is still a matter of debate, particularly as concerns the locations of the intraplate deformation. We propose here a critical review of the kinematic models published since Bullard et al., 1965,...

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...

Effect of Coarse Particle Volume Fraction on the Yield Stress of Muddy Sediments from Marennes Oleron Bay

Coastal erosion results from a combination of various factors, both natural and humaninduced, which have different time and space patterns. In addition, uncertainties still remain about the interactions of the forcing agents, as well as on the signif...

A Red Shrimp, Farfantepenaeus brasiliensis (Latreille, 1817), Larvae Feeding Regime Based on Live Food

Red shrimp, Farfantepenaeus brasiliensis, larvae's response to different concentrations of live foods (diatoms Chaetoceros gracilis: 20-100 x 103 cells/mL; flagellate Tetraselmis chuii: 2-10 x 103 cells/mL and Artemia nauplii [NA]: 1-5 NA/mL) was inv...