Observatoire de l'environnement Nouvelle Calédonie

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

Affichage des résultats: 61 à 70

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Probiotic effect of FLOC on Vibrios in the pacific white shrimp Litopenaeus Vannamei

The advantages of FLOC over clear water (CW) in rearing juvenile L. vannamei and its effects on Vibrio communities were evaluated. Survival rate in FLOC and clear water were recorded and a probiotic was tested under both conditions. Daily growth rate...

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...

Germination of two provenances of Santalum austrocaledonicum var. austrocaledonicum

During the germination phase of a #Santalum austrocaledonicum# progeny trial, important and unexpected differences occurred in the germination rates between two provenances. The "Ile des Pins" provenance conformed with expectations, previous experime...

A survey of fairy tern (Sterna nereis) breeding colonies in the southern lagoon, New Caledonia

The breeding success of Fairy Terns in New Caledonia is poorly known despite the species being considered nationally endangered. Between June and October 2004, we surveyed 22 islets and coral banks in the Southern Lagoon of New Caledonia at least onc...

Historical sea level in the South Pacific from rescued archives, geodetic measurements, and satellite altimetry

Automatic sea-level measurements in Nouméa, South Pacific, started in 1957 for the International Geophysical year. Data from this location exist in paper record for the 1957-1967 period, and in two distinct electronic records for the 1967-2005 and 2...

Evidence for mitigation of coral bleaching by manganese

Unprecedented mass coral bleaching events due to global warming and overall seawater pollution have been observed worldwide over the last decades. Although metals are often considered as toxic substances for corals, some are essential at nanomolar co...

Benthic metabolism in shallow coastal ecosystems of the Banc d'Arguin, Mauritania

Benthic primary production and respiration were investigated at 4 sites representative of the major coastal communities bordering the Sahara Desert in the Banc d'Arguin, Mauritania, Western Africa. These sites correspond to intertidal Zostera noltii ...

Contribution à l'amélioration des survies et performances de reproduction de L. stylirostris en saison fraîche en Nouvelle-Calédonie

Since 1993, the New Caledonian shrimp industry has been faced with cold season mortality outbreaks of multifactorial origin. This pathology called “Syndrome 93” affects as well animals in grow-out ponds as broodstock after their transfer in matur...

Are planktonic larvae of marine benthic invertebrates too scarce to compete within species?

Several models for the evolution of complex life histories have assumed a carrying capacity for both larval and postlarval stages. In addition, the densities of larvae in laboratory experiments are often so high that there is competition for food. Pu...

"Summer syndrome" in Litopenaeus stylirostris grow out ponds in New Caledonia: zootechnical and environmental factors

The "Summer Syndrome", a septicemic vibriosis caused by Vibrio nigripulchritudo, is responsible for one of the two main seasonal mortalities which affect shrimp aquaculture in New Caledonia. It was identified for the first time in December 1997 in an...