Consulta: subjectFacets:"New Caledonia"
Registros recuperados: 53
Data/hora: 05/06/2024 09:02:45

SPATIAL AND TEMPORAL ANALYSIS OF SEAWIFS CHLOROPHYLL IN THE SOUTH TROPICAL PACIFIC OCEAN
Provedor de dados: 72
Autores: Dupouy,C; Neveux,J; Le Bouteiller,A.
The South West Tropical Pacific (SWTP) is generally considered as an N-limiting oligotrophic area with parts characterized by permanent deep thermocline and nutricline as the Melanesian Archipelago. However, ocean color imagery shows in this region a strong seasonal chlorophyll cycle, with large blooms which have for long been attributed to nitrogen-fixing cyanobacteria as Trichodesmium. SeaWiFS surface chlorophyll analysis of the area between 5°S-25°S, 150°E-170°W has been conducted from 1997 to 2004. A strong seasonal and interannual variability is described, which relates well with the sea-truth measured chlorophyll concentrations. An empirical orthogonal function analysis helped in determining principal explicative factors of this variability, and in...
Tipo: Journal article
Palavras-chave: SeaWiFS; Trichodesmium; South Western Tropical Pacific Ocean; Solomon; New Caledonia; Vanuatu and Fiji-Tonga archipelagos; Statistical EOF analysis; Oceanic nitrogen fixation.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382004000200030

Taxonomic revision of Coralliidae with descriptions of new species from New Caledonia and the Hawaiian Archipelago
Provedor de dados: 5
Autores: Tu, Tzu-hsuan; Dai, Chang-feng; Jeng, Ming-shiou.
The systematics of Coralliidae has been revised based on molecular phylogenetic analysis and detailed morphological studies. This revision has also revealed the existence of new species. In order to fully accomplish this revision, five new species including Hemicorallium aurantiacum sp. nov., Pleurocorallium bonsaiarborum sp. nov., P. clavatum sp. nov., and P. norfolkicum sp. nov. from New Caledonia, and H. guttatum sp. nov. from the Hawaiian Archipelago are described by integrating the phylogenetic inference and morphological comparisons. Moreover, the type specimens of Corallium tortuosum, H. reginae, H. halmaheirense, P. porcellanum and P. kishinouyei as well as non-type specimens of C. stylasteroides are redescribed. The sclerites of H. reginae, H....
Tipo: Text
Palavras-chave: Coralliidae; New species; New Caledonia; The Hawaiian Archipelago; Multiple factors analysis.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00362/47279/47240.pdf

Biodiversity of shallow-water brachiopods from New Caledonia, SW Pacific, with description of a new species
Provedor de dados: 5
Autores: Bitner, Maria Aleksandra.
Twelve species of recent brachiopods belonging to the genera Lingula, Discradisca, Novocrania, Xenobrochus, Eucalathis, Frenulina, Argyrotheca, Campages, Thecidellina and Lacazella were identified in samples collected during shallow-water cruises around New Caledonia, southwest Pacific. Six genera, Lingula, Xenobrochus, Eucalathis, Frenulina, Campages and Thecidellina, have been already reported from the New Caledonian region, while four genera, Discradisca, Novocrania, Argyrotheca and Lacazella are the first records from this region. Additionally, Discradisca stella is the first discinid brachiopod recognized in the New Caledonia area. One new species is described, the megathyridid Argyrotheca neocaledonensis n. sp. The biogeographical affinities of the...
Tipo: Text
Palavras-chave: Recent brachiopods; Biogeography; Shallow water; New Caledonia; Southwest Pacific; Taxonomy; New species.
Ano: 2010
URL: https://archimer.ifremer.fr/doc/00466/57793/60061.pdf

Rain-derived particles and CDOM distribution along the East Coast of New Caledonia
Provedor de dados: 5
Autores: Dupouy, Cecile; Wattelez, Guillaume; Lefevre, Jerome; Juillot, Farid; Andreoli, Remi; Lille, Didier; Murakami, Hiroshi; Roettgers, Rudiger; Frouin, Robert.
Shortly after strong rains or tropical storms, chlorophyll-a concentration (Chla), turbidity, and colored dissolved organic matter (CDOM) in the lagoon of New Caledonia may be tripled. This effect is visible as far as 50 km offshore. The Eastern Coast of New Caledonia is more impacted than the Western Coast because of its geomorphological structure. Higher frequency and intensity of the rains, and the dominance of highly erosive lateritic formations resulted from deep weathering of ultramafic rocks. At the deeper parts of the lagoon (&gt; 20 m), increases of Chla, turbidity, and CDOM absorption can be detected by satellite imagery with their plumes extending off shore as a result of wind-driven circulation in the lagoon. Such -increases agree with the...
Tipo: Text
Palavras-chave: Minerals; Phytoplankton; CDOM; FDOM; Ocean color; Reflectance; New Caledonia; Tropical Pacific Ocean; Lagoons.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00481/59308/62064.pdf

Marine resources of the economic zone of New Caledonia
Provedor de dados: 5
Autores: Auzende, Jean-marie; Grandperrin, René; Bouniot, Emmanuel; Henin, Christian; Lafoy, Yves; De Forges, Bertrand; Van De Beuque, Sabrina; Virly, Sabrina.
The ZoNeCo programme, devoted to the evaluation of living and non-living marine resources within the Economic Zone of New Caledonia, illustrates clearly the Marine Benthic Habitats concept. It exhibits the study of the physical environment and disciplines such as geology and physical oceanography. The results acquired in these fields are used as bases to study the presence and the distribution of living species within a given habitat. The knowledge of all the parameters relative to each discipline is a useful guide for the evaluation and the sustainable management of living and nonliving resources.
Tipo: Text
Palavras-chave: Ressources marines; Habitat; Nouvelle Calédonie; Ressources Sud Ouest Pacifique; Marine resources; Habitat; New Caledonia; Southwest Pacific.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-832.pdf

Seasonal Pattern of the Biogeochemical Properties of Mangrove Sediments Receiving Shrimp Farm Effluents (New Caledonia)
Provedor de dados: 5
Autores: Marchand, Cyril; Molnar, N.; Deborde, Jonathan; Della Patrona, Luc; Meziane, Tarik.
Coastal tropical shrimp farming may impact the adjacent ecosystems through the release of large quantities of effluents rich in nutrients. In New Caledonia, mangroves are considered as a natural biofilter to reduce impacts on the surrounding World Heritage listed lagoon. Our main objective was to understand the influence of effluent discharge on the biogeochemistry of mangrove sediments. A monitoring of the physico-chemical parameters of mangrove sediments was carried out during a whole year, including active and non active periods of the farm. The parameters studied were: i) benthic primary production (Chl-a concentrations), ii) physico-chemical parameters of sediments (redox potential, pH, salinity, TOC, TN, TS, δ13C and δ15N), iii) concentrations of...
Tipo: Text
Palavras-chave: Shrimp farming; Effluents; Mangrove; Sediment biogeochemistry; New Caledonia.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00251/36253/34801.pdf

Analyse des résultats d'une ferme d'élevage de crevettes sur 20 années : SODACAL 1984-2004. "Elasticité" de la capacité de production d'un écosystème bassin crevetticole
Provedor de dados: 5
Autores: Della Patrona, Luc.
SODACAL prawn farm which was set up as a pilot farm for the development of a prawn industry in New Caledonia, saw its production exponentially rise from 1984 to 1992 (to 400 t/year, then experienced a sharp drop in 1993 (250 t/year) which carried on until 1997, and finally rose back to a stabilizing level around 400 t/year until 1999. The study analyses the difficulties observed before and during the drop of production. Among them, mortality outbreaks, other biological perturbations (benthic mat clearing and crab and fish mortality) and focus on the noxious state of the bottom (reduced and smelling sulfide hydrogen). It particularly shows that Syndrome 93 outbreaks could be observed on this farm from 1990. The analysis highlights the particular climatic...
Tipo: Text
Palavras-chave: New Caledonia; Zootechny; Climate; Ecosystem; Lethal factor; Mortality; Production; Pond culture; Shrimp culture; Climat; Facteur léthal; Bassin élevage; Zootechnie; Dysfonctionnement; Production; Nouvelle Calédonie; Aquaculture.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-718.pdf

Spatial and temporal extension of eutrophication associated with shrimp farm wastewater discharges in the New Caledonia lagoon
Provedor de dados: 5
Autores: Thomas, Yoann; Courties, Claude; El Helwe, Yasmin; Herbland, Alain; Lemonnier, Hugues.
Shrimp farming in New Caledonia typically uses a flow-through system with water exchange rates as a tool to maintain optimum hydrological and biological parameters for the crop. Moreover, the effluent shows hydrobiological characteristics (minerals, phytoplankton biomass and organic matter) significantly higher than that of the receiving environment. Separate surveys were carried out in a bay (CH Bay) with a medium-size intensive farm (30 ha) (PO) and in a mangrove-lined creek (TE Creek) near a larger semi-intensive farm (133 ha) (SO). Net loads of nitrogen exported from the semi-intensive farm and the intensive farm amounted to 0.68 and 1.36 kg ha(-1) day(-1), respectively. At CH Bay, discharge effects were spatially limited and clearly restricted to...
Tipo: Text
Palavras-chave: Environmental impact; Shrimp farming; Eutrophication; Flow cytometry; New Caledonia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12527/9882.pdf

Impact of Contrasted Weather Conditions on CDOM Absorption/Fluorescence and Biogeochemistry in the Eastern Lagoon of New Caledonia
Provedor de dados: 5
Autores: Dupouy, Cécile; Röttgers, Rüdiger; Tedetti, Marc; Frouin, Robert; Lantoine, François; Rodier, Martine; Martias, Chloe; Goutx, Madeleine.
New Caledonia (Southwest Pacific), like all tropical Pacific Island countries, is impacted by weather events, climate change, and local anthropogenic forcing. Strong erosion of particles and dissolved organic matter (DOM) from ultramafic rocks, associated with trace metals dissemination (i.e., nickel, manganese and cobalt), potentially affects lagoon waters and coral reefs surrounding the main island. The CALIOPE (CALedonian Inherent Optical PropErties) cruises were performed along the Eastern Lagoon of New Caledonia (ELNC) (400 km, 13 transects from Bay to open ocean, 51 stations) during contrasted meteorological conditions: a dry period (October 2011), a windy situation (March 2014), and a strong rainy event (March 2016). CDOM absorption and fluorescence...
Tipo: Text
Palavras-chave: Chromophoric dissolved organic matter; Fluorescence; New Caledonia; Tropical Pacific; Lagoons; Biooptics; Phytoplankton; Rivers.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00620/73166/72352.pdf

Seasonal Shifts in Diazotrophs Players: Patterns Observed Over a Two-Year Time Series in the New Caledonian Lagoon (Western Tropical South Pacific Ocean)
Provedor de dados: 5
Autores: Saulia, Emmrick; Benavides, Mar; Henke, Britt; Turk-kubo, Kendra; Cooperguard, Haley; Grosso, Olivier; Desnues, Anne; Rodier, Martine; Dupouy, Cécile; Riemann, Lasse; Bonnet, Sophie.
Coastal and open ocean regions of the Western Tropical South Pacific ocean have been identified as a hotspot of N2 fixation. However, the environmental factors driving the temporal variability of abundance, composition, and activity of diazotrophs are still poorly understood, especially during the winter season. To address this, we quantified N2 fixation rates and the abundance of seven diazotroph phylotypes (UCYN-A1 symbiosis, UCYN-B, UCYN-C, Trichodesmium, Het-1, Het-2, and Het-3) on a monthly basis during two full years (2012 to 2014) at four stations along a coast to open ocean transect in the New Caledonian lagoon. The total nifH gene concentration (sum of all nifH gene copies) clearly decreased from the barrier reef to the shore. Apart from UCYN-B,...
Tipo: Text
Palavras-chave: N-2 fixation; Diazotrophs; NifH; Abundance; New Caledonia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77027/78307.pdf

A white spot disease-like syndrome in the Pacific blue shrimp (Litopenaeus stylirostris) as a form of bacterial shell disease
Provedor de dados: 5
Autores: Goarant, Cyrille; Brizard, Raphael; Marteau, Anne-laure.
In May 1997, some white lesions evoking the white spot syndrome disease were observed in Litopenaeus stylirostris broodstock in New Caledonia. The occurrence of these lesions was neither associated with mortality, nor with histological evidence of white spot syndrome baculovirus (WSBV), The evidence suggests that these lesions result from a form of bacterial disease and are associated with an increased bacterial flora on the outer surface of the cuticle, as well as an increased incidence throughout the molt cycle. A microscopic observation of these lesions allows them to be differentiated from WSBV-associated lesions.
Tipo: Text
Palavras-chave: New Caledonia; White spot syndrome; Aquaculture; Pathogenic bacteria; Shrimp culture; Crustaceans; Diseases; Litopenaeus stylirostris.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-373.pdf

A Statistical Algorithm for Estimating Chlorophyll Concentration in the New Caledonian Lagoon
Provedor de dados: 5
Autores: Wattelez, Guillaume; Dupouy, Cecile; Mangeas, Morgan; Lefevre, Jerome; Touraivane,; Frouin, Robert.
Spatial and temporal dynamics of phytoplankton biomass and water turbidity can provide crucial information about the function, health and vulnerability of lagoon ecosystems (coral reefs, sea grasses, etc.). A statistical algorithm is proposed to estimate chlorophyll-a concentration ([chl-a]) in optically complex waters of the New Caledonian lagoon from MODIS-derived remote-sensing reflectance (R-rs). The algorithm is developed via supervised learning on match-ups gathered from 2002 to 2010. The best performance is obtained by combining two models, selected according to the ratio of R-rs in spectral bands centered on 488 and 555 nm: a log-linear model for low [chl-a] (AFLC) and a support vector machine (SVM) model or a classic model (OC3) for high [chl-a]....
Tipo: Text
Palavras-chave: Chlorophyll-a concentration; MODerate resolution Imaging Spectroradiometer (MODIS); Ocean color; Remote sensing; Statistical algorithm; Oligotrophic waters; New Caledonia; Coral lagoon.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00481/59309/62060.pdf

Etat de santé des habitats et peuplements de poissons des atolls d’Entrecasteaux, zone inscrite au Patrimoine Mondial de l’Humanité et Parc naturel de la mer de Corail. Evaluation initiale par stations vidéo rotatives STAVIRO
Provedor de dados: 5
Autores: Schohn, Thomas; Pelletier, Dominique; Carpentier, Liliane.
The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. Observation relies on remote unbaited underwater video, using the STAVIRO rotating technique (Pelletier et al. 2012).  This survey was conducted in 2015 in Entrecasteaux Reefs, both located within the Coral Sea Natural Park, and part of World Heritage site. 109 STAVIRO were validated in 9 days, covering the reefs and geomorphological units in the area. Images were analyzed to characterize the habitat surrounding each station, and fishes based on a list of 565 species (Pelletier et al. 2016).  28 indicators were computed and represented on maps (Sextant server). Indicators were analyzed using the...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Aire Marine Protégée; Patrimoine mondial; Parc de la mer de Corail; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Cartes; Sextant; PAMPA; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Marine Protected Area: Coral Sea Natural Park; World Heritage; Coral reefs; New Caledonia; Indicator; Dashboard; Map; Sextant; PAMPA.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51760/52357.pdf

Social Structure, Habitat Use and Injuries of Indo-Pacific Bottlenose Dolphins (Tursiops aduncus) Reveal Isolated, Coastal, and Threatened Communities in the South Pacific
Provedor de dados: 5
Autores: Bonneville, Claire Daisy; Derville, Solène; Luksenburg, Jolanda A.; Oremus, Marc; Garrigue, Claire.
Understanding population structure and habitat use of poorly known cetacean species is a first step toward scientifically informed management decisions. In the southern range of New Caledonia (South Pacific), a long-term dataset of Indo-Pacific bottlenose dolphins (Tursiops aduncus) encounters primarily during winter seasons 1997 to 2019 (473 group observations) was used to assess social structure, habitat use and potential threats. A total of 338 individuals were photographically identified, forming three distinct communities in the south-west lagoon, the south lagoon and the Isle of Pines. Mark-recapture histories revealed that the three communities were weakly connected and might be considered as independent management units. Suitable habitats were...
Tipo: Text
Palavras-chave: Odontocetes; New Caledonia; Social communities; Habitat; Anthropogenic impacts; Scars.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00682/79407/81953.pdf

Estimation des stocks de poisson des lagons de Nouvelle-Calédonie : 1 – Structure et stocks des communautés des poissons de récifs.
Provedor de dados: 5
Autores: Letourneur, Y; Kulbicki, M; Labrosse, Pierre.
Lagoon fish in New Caledonia are mainly caught by artisanal fisheries and subsistence fishing. Reef fish are the major component of this catch. The present study aimed at estimating these reef fish standing stocks and at finding the main factors influencing the distribution of these fish. Sampling of 904 stations was stratified according to three zones (north, east and west) and three reef types (barrier, intermediate and fringing). Fish communities exhibited strong heterogeneity in their distribution, showing higher biomass (maximum of 447 g.m(-2)) and total standing stock (43 000 tonnes) in the north zone than in the east and west zones. Similarly, observed patterns were dependent on reef types: higher biomass and total standing stock being observed on...
Tipo: Text
Palavras-chave: Poissons de récifs; Poissons démersaux commerciaux; Structure de population; Nouvelle-Calédonie; Océan Pacifique; Reef fish; Commercial demersal fish; Population structure; New Caledonia; SW Pacific Ocean.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00608/71968/70658.pdf

Traitement des crevettes contre le noircissement .Mise au point d'une ligne de traitement
Provedor de dados: 5
Autores: Chantreau, Patrick.
Once fished, the shrimps must be cooled quickly in water cooled in order to slow down all chemical and bacteriological activities. In addition, in order to avoid blackening (mélanose) shrimps (céphalothorax and legs) it is necessary to treat those with an antioxydant product. The product currently used to inhibit this enzymatic change is the soda niétabisuifite (Na-&gt; S7 O5), until now, after being fished. the shrimps were directly soaked in a cooled water tank, containing the pesticide.  The solution of treatment was progressively prepared needs. The concentration of this one was approximately 2 to 3% of métabisulfite, that is to say 6 to 9 G of SO2 per liter for a starting product containing 320 G of SO2 approximately.  In order to preserve a good...
Tipo: Text
Palavras-chave: New Caledonia; Blackening; Treatment; Penaeus stylirostris; Shrimp; Nouvelle Calédonie; Noircissement; Traitement; Penaeus stylirostris; Crevette.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-1648.pdf

Phytoplankton dynamics in the southern New Caledonian lagoon during a southeast trade winds event
Provedor de dados: 5
Autores: Neveux, Jacques; Lefebvre, Jean-pierre; Le Gendre, Romain; Dupouy, Cecile; Gallois, Francis; Courties, Claude; Gerard, Philippe; Fernandez, Jean-michel; Ouillon, Sylvain.
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 waters. In this area, the coral reefs form two horn-like structures (hereinafter referred to as 'horn reefs'), oriented south-east, and separated by a relatively deep valley. Three repeated samplings at one week intervals of a 32 station array showed that trade winds induce surface water cooling and significant enrichment of mid- and bottom waters above the reef shelf. This enrichment appeared as the result of a general rise of the oceanic thermocline and nitracline due to the combination of trade winds and...
Tipo: Text
Palavras-chave: Chlorophyll; Phycoerythrin; Flow cytometry; Phytoplankton; In vivo fluorescence; Growth rate; Trade winds; Lagoon; Internal wave; New Caledonia.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12437/9258.pdf

Evolution Géodynamique du domaine Ouest-offshore de la Nouvelle-Calédonie et de ses extensions vers la Nouvelle-Zélande
Provedor de dados: 5
Autores: Collot, Julien.
The southwest Pacific results from the fragmentation of Gondwanaland since the Cretaceous time.  The purpose of the current PhD work is to deepen our understanding of the history of the New Caledonia and Fairway basins, located west of New Caledonia, in order to better constrain the geodynamical evolution of the SW Pacific from Cretaceous to Oligocene. The analysis of new geophysical data has led to distinguish 3 main phases of this fragmentation:  1 Mid Cretaceous formation of the Fairway-Aotea Basin in a continental intra-arc position. The formation of this basin reflects the initial stage of continental fragmentation of the Eastern Gondwana margin. The causes of this fragmentation are to be searched for in a major change of the dynamics of the...
Tipo: Text
Palavras-chave: Subduction; Obduction; Norfolk; Lord Howe; Gondwana; Taranaki; New Caledonia; Fairway; Aotea; Magnetic; Gravity; Seismic; Subduction; Obduction; Norfolk; Lord Howe; Gondwana; Taranaki; Nouvelle Calédonie; Fairway; Aotea; Magnétisme; Gravimétrie; Sismique.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6520.pdf

A step toward the definition of ecological indicators of the impact of fishing on the fish assemblage of the Abore reef reserve (New Caledonia)
Provedor de dados: 5
Autores: Amand, Marion; Pelletier, Dominique; Ferrari, Jocelyne; Kulbicki, Michel.
Marine Protected Areas (MPA) are often contemplated as a tool for the sustainable management of exploited resources and ecosystem conservation. This paper proposes an approach to establish a statistical diagnostic of the effects of MPAs on fish assemblages, and define corresponding ecological indicators. This requires choosing relevant variables (abundance, diversity, demographic parameters..) and appropriate statistical methods. The study was based on data from the Abore reef Reserve in New Caledonia. Two sets of methods: 1-inferential linear models (ANOVA, GLM): 2- Partial Least Squares (PLS) methods of regression, were used to test the effects of this MPA. PLS enabled us to test simultaneously within a model, density, species richness, biomass and mean...
Tipo: Text
Palavras-chave: New Caledonia; PLS regression; Ecological indicators; Fishing impact; Coral reef; Fish; Marine Protected Areas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-398.pdf

Etat de santé des habitats et peuplements de poissons des îles et récifs de l’Astrolabe, Pétrie et Walpole, Parc Naturel de la Mer de Corail. Evaluation initiale par stations vidéo rotatives STAVIRO
Provedor de dados: 5
Autores: Schohn, Thomas; Bockel, Thomas; Carpentier, Liliane; Pelletier, Dominique.
- The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. The survey relies on remote unbaited underwater video observations, using the STAVIRO rotating technique.  - The study pertains to the reefs of Astrolabe, Pétrie and Walpole Island, located within the Coral Sea Natural Park. The survey conducted in 2014 covers the entire area, and the sampling design was stratified according to reef type. 95 stations were validated. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a list of 565 fish species (cf. AMBIO/A/1).  - 28 indicators were computed and mapped (maps available on a Sextant server)....
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Parc naturel mer de Corail; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Ecosystème corallien; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Marine Protected Area: Coral Sea Natural Park; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00406/51738/52324.pdf

Diazotrophs: a non-negligible source of nitrogen for the tropical coral Stylophora pistillata
Provedor de dados: 5
Autores: Benavides, Mar; Houlbreque, Fanny; Camps, Mercedes; Lorrain, Anne; Grosso, Olivier; Bonnet, Sophie.
Corals aremixotrophs: they are able to fix inorganic carbon through the activity of their symbiotic dinoflagellates and to gain nitrogen from predation on plankton and uptake of dissolved organic and inorganic nutrients. They also live in close association with diverse diazotrophic communities, inhabiting their skeleton, tissue and mucus layer, which are able to fix dinitrogen (N-2). The quantity of fixed N-2 transferred to the corals and its distribution within coral compartments as well as the quantity of nitrogen assimilated through the ingestion of planktonic diazotrophs are still unknown. Here, we quantified nitrogen assimilation via (i) N-2 fixation by symbiont diazotrophs, (ii) ingestion of cultured unicellular diazotrophs and (iii) ingestion of...
Tipo: Text
Palavras-chave: Scleractinian corals; Heterotrophic nutrition; Cyanothece; N-2 fixation; New Caledonia.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00356/46678/72967.pdf

Estimation des stocks de poissons des lagons de Nouvelle-Calédonie : 3 – Pression de pêche, rendements potentiels et impact sur les options d’aménagement
Provedor de dados: 5
Autores: Labrosse, Pierre; Letourneur, Y; Kulbicki, M; Paddon, Jr.
The potential yields of demersal reefal and lagoonal finfish, which are valuable for trade or consumption in the Northern Province of New Caledonia, are unknown. Fishing pressure was estimated from tally-sheets of professional fishermen to assess trade fishing and a household consumption survey to assess subsistence fishing. Total yield was estimated to be 1 326 tonnes in 1995, 94 % of which correspond to subsistence fishing. Most of the catches were taken from the east and west coasts; in the north zone (Belep Archipelago) catches were very low. From this fishing pressure and the total stock values, the maximum sustainable yield (MSY) was estimated to be 12 600 t, which was about 10 % of the total stocks assessed in the Northern Province (138 300 t). This...
Tipo: Text
Palavras-chave: Pêcheries lagonaires; Captures; Prises maximales soutenues; Pêche de subsistance; Nouvelle-Calédonie; Océan Pacifique; Lagoon fisheries; Fishery resources; Current yields; Maximum sustainable yields; Subsistence fishing; New Caledonia; Pacific Ocean.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00608/71970/70660.pdf

Vers une modélisation déterministe des écoulements de surface en Nouvelle-Calédonie. Implémentation du code GR4H sur quatre bassins versants du Grand Nouméa
Provedor de dados: 5
Autores: Desclaux, Terence; Pischedda, Marine; Lemonnier, Hugues; Soulard, Benoit; Le Gendre, Romain.
Ce rapport fait suite au stage de Marine Pischedda (Master 2 La Rochelle) réalisé au sein de l’unité de recherche "Lagons, Ecosystèmes et Aquaculture Durable en Nouvelle-Calédonie" (LEAD/NC) de l’Ifremer entre février et juillet 2016. Cette étude a été conduite sur quatre bassins versants du Grand Nouméa : la Coulée, la Dumbéa Est, la Dumbéa Nord et la Couvelée. L’objectif principal était de démontrer la pertinence de l’utilisation de modèle pluie-débit au pas de temps horaire (GR4H en l’occurrence) sur les bassins versants calédoniens. Le cadre plus général de ce travail était d’aboutir à une représentation affinée du continuum terre-mer par le couplage des modèles GR4H et MARS3D développés pour simuler la circulation côtière. Les périodes d’étiages ayant...
Tipo: Text
Palavras-chave: Continuum Terre-Lagon; Nouvelle-Calédonie; Rivières; GR4H; Bassins versants; Grand Nouméa; Modélisation; Débits; Land-lagoon continuum; New Caledonia; River; GR4H; Watershed; Nouméa; Model; River Flow.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49969/50545.pdf

Shrimp aquaculture in New Caledonia
Provedor de dados: 5
Autores: Galinie, C.
In New Caledonia, there is no indigenous shrimp species for commercial aquaculture and it is necessary to control the complete cycle in captivity. Since 1973 and the creation of the Station d'Aquaculture de Saint-Vincent (S.A.S.V.), a joint project between IFREMER, France-Aquaculture and the territory of New Caledonia, nine species have been tested and for one of these, P. stylirostris , (introduced in 1980), we are now in a commercial scale production with the tenth generation obtained in captivity.
Tipo: Text
Palavras-chave: New Caledonia; Penaeus stylirostris; Rearing; Stocking density; Larvae; Growth; Pellet feeds; Intensive culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1496.pdf

Effet des conditions environnementales sur le développement des pathologies à Vibrio dans les élevages de crevettes en Nouvelle-Calédonie
Provedor de dados: 5
Autores: Lemonnier, Hugues.
Shrimp aquaculture in New Caledonia is a developing industry, exclusively based on the species Litopenaeus stylirostris. However, it is subject to mortalities during grow out as observed all over the world. Since 1993, shrimp reared during the cold period are affected by a disease named "syndrome 93". As a consequence, the whole industry has become seasonal and produces essentially during the warm season. The climatic conditions during the periods of transition between the two main seasons could be responsible for an environmental stress and the origin reason for mortality outbreaks. Stocking density is the main risk factor. It increases the probability of the appearance and development of the epizooty in the pond. The "Summer Syndrome", a septicemic...
Tipo: Text
Palavras-chave: New Caledonia; Risk factors; Environmental stress; Vibriosis; Epizooty; Pond management; Eutrophication; Pond health; Shrimp; Litopenaeus stylirostris; Peneids; Aquaculture; Nouvelle  Calédonie; Facteur de risque; Stress environnemental; Vibrioses; Pratiques d'élevage; Eutrophisation; Santé de l'écosystème bassin; Crevette; Litopenaeus stylirostris; Pénéides; Aquacultre.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-2643.pdf

Des systèmes vidéo rotatifs pour étudier l'ichtyofaune : Applications à l’analyse des variations spatiales et temporelles dans le lagon de Nouvelle-Calédonie
Provedor de dados: 5
Autores: Mallet, Delphine.
Estimating diversity and abundance of fish is fundamental for the understanding of community structure and dynamics of coral reefs. Observations are generally gathered using Underwater Visual Census (UVC). These informations can also be collected by underwater video techniques involving no diver and allowing a high spatial and temporal coverage. The first part of this PhD thesis is a review of publications using underwater video techniques between 1952 and 2012. The second part present two rotating video systems used to study the diversity of ichthyofauna and habitats in the lagoon of New Caledonia: the STAVIRO (for "STAtion VIdeo ROtative") and the MICADO (for "Module d’Imagerie Côtier, Autonome pour le Développement de l’Observation sous-marine"). The...
Tipo: Text
Palavras-chave: Vidéo sous-marine; Systèmes d’observation; Poissons coralliens; Nouvelle-Calédonie; Underwater video; Observation systems; Coral reef fish; New Caledonia.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/30050/28536.pdf

Expériences sur l'influence des sédiments du bassin d'élevage sur la physiologie de Penaeus stylirostris. Rapport des travaux menés du 26 novembre au 7 décembre 1955 à la Station Saint Vincent
Provedor de dados: 5
Autores: Cochard, Jean-claude; Goarant, Cyrille; Boglio, Eric; Lemonnier, Hugues.
The influence of the soil quality of culture pond on the physiological state of Penaeus stylirostris reared in earthen shrimp pond in New Caledonia was investigated by the measurement of the osmoregulatory capacity and magnesium hemolymph concentration of samples of 20 of these shrimp captured in the pond and maintained for 24 or 48h in cages laid on the bottom. A first experiment was affected by the occurrence of a pathology caused by Vibrio penaeicida probably due to initial handling stress. The second experiment showed that the osmoregulatory capacity is depresssed as a function of the soil quality : the more it is reduced the more the depression is important.
Tipo: Text
Palavras-chave: Crevettes; Penaeus; P. stylirostris; Nouvelle Calédonie; Capacité osmorégulatrice; Stress; Sédiment; Shrimp culture; Penaeus; P. stylirostris; New Caledonia; Osmoregulatory capacity; Stess; Soil.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00426/53779/54664.pdf

Etat de santé initial des habitats et peuplements de poissons des récifs de Chesterfield-Bellona, Parc Naturel de la Mer de Corail, Campagne de stations vidéo rotatives STAVIRO 2013
Provedor de dados: 5
Autores: Pelletier, Dominique; Bockel, Thomas; Roman, William; Carpentier, Liliane; Laugier, Thierry.
- The AMBIO project conducted a comprehensive video-based baseline assessment of coral reef fish communities and associated habitats in the New Caledonian lagoons. The surveys rely on remote unbaited underwater video observations, using the STAVIRO rotating technique. Chesterfield and Bellona remote reefs and atolls are located in the Coral Sea Marine Park, northwest of New Caledonia. -This 2013 survey is the first scientific survey covering the entire area, with a sampling design stratified according to reef type. 203 stations were validated within 10 days. They were analyzed to characterize the habitat surrounding each station, and fish communities, based on a list of 565 fish species (cf. AMBIO/A/1). - 34 indicators were computed and mapped (maps...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Parc de la Mer de Corail; Aire Marine Protégée; AMP; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Biodiversity; Fish; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Coral Sea Marine Park; Marine Protected Area; MPA; World Heritage; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00381/49247/49700.pdf

Suitability of a lumped rainfall–runoff model for flashy tropical watersheds in New Caledonia
Provedor de dados: 5
Autores: Desclaux, Terence; Lemonnier, Hugues; Genthon, Pierre; Soulard, Benoit; Le Gendre, Romain.
The GR4H lumped hourly rainfall–runoff model was assessed for its integration in a ridge-to-reef modelling framework. Particular attention was paid to rainfall representation, robustness of parameter estimates and ability to reproduce main runoff features. The study was conducted in four tropical mountainous watersheds in New Caledonia, exposed to intense rainfall events, large annual climatic variations triggered by El Niño oscillation, and wildfires. The inverse distance and elevation weighting algorithm outperformed other classical rainfall interpolation methods under data-limited conditions. The time-span of data needed for robust calibration was site-specific and varied from 6–7 years to 10 years, which may be linked to El Niño events and to...
Tipo: Text
Palavras-chave: Hydrological model; Ridge-to-reef; GR4H; Rainfall-runoff model; Integrated modelling; New Caledonia; Lagoon; Wildfire.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56681/58466.pdf

Effect of water exchange on effluent and sediment characteristics and on partial nitrogen budget in semi-intensive shrimp ponds in New Caledonia
Provedor de dados: 5
Autores: Lemonnier, Hugues; Faninoz, Sebastien.
An experiment was conducted in six earthen ponds with 20 shrimps m(-2) Litopenaeus stylirostris (Stimpson) during the warm season in New Caledonia to study the dynamics of wastes in relation with water exchange rate (WER). The nitrogen budget was established, taking into account the different forms of nitrogen in the water, sediment, feed and shrimp. Data from a wide range of treatments applied in unreplicated ponds were treated using regression analysis to establish the relationship between WER and partial nitrogen budget, sediment characteristics and shrimp performance. To compare effluent quality between treatments during the season, data were analysed using the non-parametric sign test. The water outflow was characterized by a decrease in the...
Tipo: Text
Palavras-chave: New Caledonia; Nitrogen; Water exchange; Shrimp; Sediment quality; Effluent.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1811.pdf

Meiofauna distribution in a mangrove forest exposed to shrimp farm effluents (New Caledonia)
Provedor de dados: 5
Autores: Della Patrona, Luc; Marchand, C.; Hubas, C.; Molnar, N.; Deborde, J.; Meziane, T.
Meiofauna abundance, biomass and individual size were studied in mangrove sediments subjected to shrimp farm effluents in New Caledonia. Two strategies were developed: i) meiofauna examination during the active (AP) and the non-active (NAP) periods of the farm in five mangrove stands characteristics of the mangrove zonation along this coastline, ii) meiofauna examination every two months during one year in the stand the closest to the pond (i.e. Avicennia marina). Thirteen taxonomic groups of meiofauna were identified, with nematodes and copepods being the most abundant ones. Meiofauna abundance and biomass increased from the land side to the sea side of the mangrove probably as a result of the increased length of tidal immersion. Abundance of total...
Tipo: Text
Palavras-chave: Mangrove; Meiofauna; Shrimp farming; Environmental status; New Caledonia.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00341/45170/44620.pdf

Social carrying capacity assessment from questionnaire and counts survey: Insights for recreational settings management in coastal areas
Provedor de dados: 5
Autores: Gonson, Charles; Pelletier, Dominique; Alban, Frederique.
Because of demographic and tourism increase, coastal areas are facing higher numbers of recreational users. Together with other factors (environmental quality, protection status), the level of use affects the spatial distribution of users. This level also affects the quality of user experience, because beyond a certain level, the number of users results in decreased user satisfaction; this is the social carrying capacity (SCC), which depends on user and site characteristics. This study assessed the SCC in a popular coastal area and examined how it influences the spatial distribution of users. Boat and visitor counts as well as data from a questionnaire-based survey were analyzed to assess i) crowding perception, ii) factors affecting the disturbance...
Tipo: Text
Palavras-chave: Marine protected areas; Recreational users; Social carrying capacity; Coping strategy; New Caledonia.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56541/58331.pdf

Decadal increase in the number of recreational users is concentrated in no-take marine reserves
Provedor de dados: 5
Autores: Gonson, Charles; Pelletier, Dominique; Gamp, Elodie; Preuss, Bastien; Jollit, Isabelle; Ferraris, Jocelyne.
In coastal areas, demographic increase is likely to result in greater numbers of recreational users, with potential consequences on marine biodiversity. These effects may also occur within Marine Protected Areas (MPAs), which are popular with recreational users. Our analysis builds on data collected over a ten-year period during three year-round surveys to appraise changes in recreational boating activities in coral ecosystems. Results show that the number of boaters has greatly increased, particularly so within MPAs during weekends and the warm season, when peaks in boat numbers have become more frequent. We also observed that the number of anchored boats has increased over the period. These changes may be resulting in biophysical impacts that could be...
Tipo: Text
Palavras-chave: Recreational uses; MPA; Coral reef ecosystem; Spatio-temporal pattern; New Caledonia; Mooring practices.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00327/43776/44014.pdf

Development patterns of fringing and barrier reefs in New Caledonia (southwest Pacific)
Provedor de dados: 5
Autores: Cabioch, G; Correge, T; Turpin, L; Castellaro, C; Recy, J.
In New Caledonia, core data indicate that the fringing reefs grew during the last interglacial and the Holocene, while the barrier reefs developed during several high sea level stands of the Quaternary. These growth periods are archived in a 128-m-long core from Ilot Amedee, offshore of Noumea. Directly upon the peridotitic substrate (reached at 126.50 m), a basal unit comprising abundant rhodoliths, molluscs and rare corals is characteristic of the pioneer stage of barrier reef development. Above it, a severely calcitized unit contains corals, molluscs and abundant micritic levels. Then, a sequence punctuated by several minor discontinuities and by a downward increase in diagenetic alteration is found. At 47 m core depth, a unit, which is thought to be...
Tipo: Text
Palavras-chave: Croissance récifale; Néotectonique; Nouvelle-Calédonie; Quaternaire; Reef growth; Neotectonics; New Caledonia; Quaternary.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00325/43582/44021.pdf

Circulation and suspended sediment transport in a coral reef lagoon: The south-west lagoon of New Caledonia
Provedor de dados: 5
Autores: Ouillon, S.; Douillet, Pascal; Lefebvre, J. P.; Le Gendre, Romain; Jouon, Aymeric; Bonneton, P.; Fernandez,; Chevillon, C.; Magand, O.; Lefevre, J.; Le Hir, Pierre; Laganier, R.; Dumas, Franck; Marchesiello, P.; Madani, A. Bel; Andrefouet, S.; Panche, J. Y.; Fichez, R.
The south-west lagoon of New Caledonia is a wide semi-open coral reef lagoon bounded by an intertidal barrier reef and bisected by numerous deep inlets. This paper synthesizes findings from the 2000-2008 French National Program EC2CO-PNEC relative to the circulation and the transport of suspended particles in this lagoon. Numerical model development (hydrodynamic, fine suspended sediment transport, wind-wave, small-scale atmospheric circulation) allowed the determination of circulation patterns in the lagoon and the charting of residence time, the later of which has been recently used in a series of ecological studies. Topical studies based on field measurements permitted the parameterisation of wave set-up induced by the swell breaking on the reef barrier...
Tipo: Text
Palavras-chave: Hydrodynamics; Suspended sediment; New Caledonia; Coral reef lagoon; Sediment; Turbidity; Resuspension.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12526/9401.pdf

Tectonic history of northern New Caledonia Basin from deep offshore seismic reflection: Relation to late Eocene obduction in New Caledonia, southwest Pacific
Provedor de dados: 5
Autores: Collot, Julien; Geli, Louis; Lafoy, Y; Vially, R; Cluzel, D; Klingelhoefer, Frauke; Nouze, Herve.
New, high-quality multichannel seismic reflection data from the western New Caledonia offshore domain allow for the first time the direct, continuous connection of seismic reflectors between the Deep Sea Drilling Project 208 drill hole on the Lord Howe Rise and the New Caledonia Basin. A novel seismic interpretation is hence proposed for the northern New Caledonia Basin stratigraphy, which places the Eocene/Oligocene unconformity deeper than previously thought and revisits the actual thickness of the pre-Oligocene sequences. A causal link is proposed between the obduction of the South Loyalty Basin over New Caledonia (NC) and the tectonic history of the northern New Caledonia Basin. Here it is suggested that as the South Loyalty Basin was being obducted...
Tipo: Text
Palavras-chave: New Caledonia; Seismics; Obduction.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4782.pdf

Evaluation de l’état de santé des habitats et peuplements de poissons de la zone de Voh-Koné-Pouembout, Campagnes de stations vidéo rotatives STAVIRO 2007-2013
Provedor de dados: 5
Autores: Giraud-carrier, Charlotte; Pelletier, Dominique.
• Conducted within the AMBIO project, this work deals with coral reef fish communities and associated habitats, in the New Caledonian lagoons. It aims at assessing the status and trends of habitats and mobile macrofauna in the Voh-Kone-Pouembout lagoon, in the light of demographic and industrial developments and accounting for the existing customary reserve of Oundjo. • It relies on 280 stations collected in 2007 and 2013 using the remote unbaited underwater video STAVIRO rotating technique, which were analysed to characterize habitat, fish assemblages, turtles and sea snakes, from a list of 490 species (AMBIO/A/1). • 143 species (including one turtle species and one sea snake species), belonging to 23 families were observed. The most frequent and abundant...
Tipo: Text
Palavras-chave: Biodiversité; Ichtyofaune; Habitat; Vidéo sous-marine; STAVIRO; Evaluation; Suivi; Impact anthropique; Aire Marine Protégée; Réserve coutumière; Ecosystème corallien; Nouvelle-Calédonie; Indicateur; Tableau de bord; Serveur de cartes; Sextant; PAMPA; Biodiversity; Fish assemblage; Habitat; Underwater video; STAVIRO; Monitoring and assessment; Anthropogenic impact; Marine Protected Area; MPA; Customary reserve; Coral reefs; New Caledonia; Indicator; Dashboard; Map server; Sextant; PAMPA.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47109/47050.pdf

Concentrations and fractionation of carbon, iron, sulfur, nitrogen and phosphorus in mangrove sediments along an intertidal gradient (semi-arid climate, New Caledonia)
Provedor de dados: 5
Autores: Deborde, Jonathan; Marchand, Cyril; Molnar, Nathalie; Della Patrona, Luc; Meziane, Tarik.
In mangrove ecosystems, strong reciprocal interactions exist between plant and substrate. Under semi-arid climate, Rhizophora spp. are usually predominant, colonizing the seashore, and Avicennia marina develops at the edge of salt-flats, which is the highest zone in the intertidal range. Along this zonation, distribution and speciation of C, Fe, S, N, and P in sediments and pore-waters were investigated. From the land-side to the sea-side of the mangrove, sediments were characterized by I/ increase in: (i) water content; (ii) TOC; (iii) mangrove-derived OM; II/ and decrease in: (i) salinity; (ii) redox; (iii) pH; (iv) solid Fe and solid P. Beneath Avicennia and Rhizophora, TS accumulated at depth, probably as a result of reduction of iron oxides and...
Tipo: Text
Palavras-chave: Mangrove; Zonation; Biogeochemistry; New Caledonia.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00251/36252/34802.pdf

Scale-dependency of the environmental influence on fish β-diversity: Implications for ecoregionalization and conservation
Provedor de dados: 5
Autores: Garcia, Jessica; Pelletier, Dominique; Carpentier, Liliane; Roman, William; Bockel, Thomas.
Aim To determine the ecoregions (spatial marine areas with similar environmental and physical conditions associated with relatively homogeneous fish assemblages) for shallow reef fish assemblages based on predictive models of beta diversity (β‐diversity) that account for both large‐scale environmental factors and local habitat characteristics. We assessed the influence of a spatial scale to rank the importance of these factors. Location New Caledonian (south‐west Pacific Ocean, 17–24° S, 158–172° W) Exclusive Economic Zone, Coral Sea Marine Park. Taxon Fish. Methods Fish and habitat data that were collected at 13 sites around New Caledonia using unbaited rotating underwater video (285 sampling stations) were analysed. Gradient forest modelling was used to...
Tipo: Text
Palavras-chave: Β‐diversity; Ecoregion; Gradient forest; Marine biodiversity; New Caledonia; Scale-dependency; Species turnover; Underwater video.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56668/58629.pdf

Variability in diel and seasonal in situ metabolism of the tropical gastropod Tectus niloticus
Provedor de dados: 5
Autores: Lorrain, A.; Clavier, J.; Thebault, J.; Tremblay-boyer, L.; Houlbreque, F.; Amice, E.; Le Goff, M.; Chauvaud, L.
Researchers often use metabolic measurements in the field over narrow time periods to estimate an organism's metabolism over large time scales. Here, we measured in situ respiration, calcification and excretion rates of the tropical gastropod Tectus niloticus L. through benthic chamber experiments. Our samples spanned a 21 h time frame and were taken during both the warm and cool seasons. We assessed diel and seasonal variability in metabolic rates, as well as the effect of individual size and the contribution of shell epi-and endobionts. Our results show that metabolic rates vary through time at both diel and seasonal scales, as measured fluxes for respiration and calcification were significantly higher at night during the warm season. This nocturnal...
Tipo: Text
Palavras-chave: Gastropod; Seasonal variations; Diel variations; Size; Carbon fluxes; CO2; CaCO3; New Caledonia.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00256/36675/39633.pdf

Benefits of swath mapping for the identification of marine habitats in the New Caledonia Economic Zone
Provedor de dados: 5
Autores: Van De Beuque, Sabrina; Auzende, Jean-marie; Lafoy, Yves; Grandperrin, René.
The ZoNeCo programme is devoted to the evaluation of the marine resources of the Economic Zone of New Caledonia. The results are essentially dependent on the quality of the seafloor mapping. From 1993 to 1996, four geological and geophysical surveys using the EM12 DUAL multibeam echosounder provided swath-mapping and acoustic imagery data of the seafloor of selected sites on the northern and southern parts of the Norfolk ridge, the Loyalty basin, around the Loyalty islands and in the westernmost part of the Economic Zone of New Caledonia. The accuracy of these documents shows the morphology of the seafloor in detail and allows rocky substratum to be differentiated from muddy bottom. It allows favorable emplacements of future exploratory fishing surveys to...
Tipo: Text
Palavras-chave: Ressources marines; Habitats marins; Cartographie multifaisceaux; Nouvelle Calédonie; Sud Ouest Pacifique; Marine resources; Marine habitats; Swath mapping; New Caledonia; SW Pacific.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-833.pdf

Plasticity matches phenotype to local conditions despite genetic homogeneity across 13 snake populations
Provedor de dados: 5
Autores: Bonnet, Xavier; Brischoux, François; Briand, Marine; Shine, Richard.
In a widespread species, a matching of phenotypic traits to local environmental optima is generally attributed to site-specific adaptation. However, the same matching can occur via adaptive plasticity, without requiring genetic differences among populations. Adult sea kraits (Laticauda saintgironsi) are highly philopatric to small islands, but the entire population within the Neo-Caledonian Lagoon is genetically homogeneous because females migrate to the mainland to lay their eggs at communal sites; recruits disperse before settling, mixing up alleles. Consequently, any matching between local environments (e.g. prey sizes) and snake phenotypes (e.g. body sizes and relative jaw sizes (RJSs)) must be achieved via phenotypic plasticity rather than spatial...
Tipo: Text
Palavras-chave: Gape limited; Jaw size; Laticauda; Local adaptation; New Caledonia; Sea krait.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78892/81189.pdf

Optical algorithms at satellite wavelengths for Total Suspended Matter in tropical coastal waters
Provedor de dados: 5
Autores: Ouillon, Sylvain; Douillet, Pascal; Petrenko, Anne; Neveux, Jacques; Dupouy, Cecile; Froidefond, Jean-marie; Andrefouet, Serge; Munoz-caravaca, Alain.
Is it possible to derive accurately Total Suspended Matter concentration or its proxy, turbidity, from remote sensing data in tropical coastal lagoon waters? To investigate this question, hyperspectral remote sensing reflectance, turbidity and chlorophyll pigment concentration were measured in three coral reef lagoons. The three sites enabled us to get data over very diverse environments: oligotrophic and sediment-poor waters in the southwest lagoon of New Caledonia, eutrophic waters in the Cienfuegos Bay (Cuba), and sediment-rich waters in the Laucala Bay (Fiji). In this paper, optical algorithms for turbidity are presented per site based on 113 stations in New Caledonia, 24 stations in Cuba and 56 stations in Fiji. Empirical algorithms are tested at...
Tipo: Text
Palavras-chave: Ocean color; Remote sensing; Sediment transport; Suspended matter; Turbidity; New Caledonia; Cuba; Fiji.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/00203/31417/29808.pdf

Mitigation of sea level rise effects by addition of sediment to shrimp ponds
Provedor de dados: 5
Autores: Della Patrona, Luc; Beliaeff, Benoit; Pickering, T.
In New Caledonia barren salt-pans located landward to mangroves are used for the construction of shrimp ponds. The existing farms are jeopardized by the projected rise in the sea level, because the landward boundaries of ponds are situated at the elevation reached by spring tides. One low-cost strategy for mitigating the effects of sea level rise is to raise the level of the bottom of ponds. To test the effectiveness of such an adaptation, we built 4 experimental ponds in the low-lying zone of an existing 10 ha shrimp pond. The level of the bottom of 2 ponds was raised by adding about 15 cm of agricultural soil. Placing agricultural soil in the pond did not impair the functioning of the shrimp pond ecosystem. On the contrary, it resulted in unexpectedly...
Tipo: Text
Palavras-chave: Climate change; Sea-level rise; Shrimp pond; Sediment enhancement; Biogeochemistry; Infaunal assemblages; New Caledonia.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00069/18030/15570.pdf

Isolation and partial characterization of bacteria (Pseudoalteromonas sp.) with potential antibacterial activity from a marine costal environment from New Caledonia
Provedor de dados: 5
Autores: Dufourcq, R.; Chalkiadakis, Eletherios; Fauchon, M.; Deslandes, Eric; Kerjean, V.; Chanteau, S.; Petit, Elodie; Guezennec, Jean; Dupont-rouzeyrol, M.
Marine bacteria are a rich source of bioactive metabolites. However, the microbial diversity of marine ecosystem still needs to be explored. The aim of this study was to isolate and characterize bacteria with antimicrobial activities from various marine coastal environment of New Caledonia. We obtained 493 marine isolates from various environments and samples of which 63 (12.8%) presented an antibacterial activity against a panel of reference pathogenic strains (Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterococcus faecalis). Ten out of the most promising strains were cultured, fractionated and screened for antibacterial activity. Four of them (NC282, NC412, NC272 and NC120) showed at least an activity against reference and...
Tipo: Text
Palavras-chave: Antibacterial activity; Characterization; Marine bacteria; New Caledonia; Screening.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00174/28552/26994.pdf

Cantharellus noumeae (gen. nov., spec. nov.), a new scleractinian coral (Fungiidae) from new Caledonia
Provedor de dados: 16
Autores: Hoeksema, B.W.; Borel Best, M.
A new monospecific genus in the coral family Fungiidae (Scleractinia) is described. Its affinities with two other genera are discussed.
Tipo: Article / Letter to the editor
Palavras-chave: Scleractinia; Fungiidae; New genus; New species; New Caledonia; 42.72.
Ano: 1984
URL: http://www.repository.naturalis.nl/record/318550

Revision of Alyxia (Apocynaceae). Part 2: Pacific Islands and Australia
Provedor de dados: 16
Autores: Middleton, David J.
The genus Alyxia is revised for Australia and the islands of the Pacific Ocean as the second and final part of a complete revision of the genus. 39 species are recognised for this area of which three are new to science, two are new combinations and one is a new name. 14 species are found in Australia and its offshore territories, 21 species in New Caledonia and the Loyalty Islands, and seven species in the other islands of the Pacific. There is relatively little overlap between regions: two species are found in Malesia and Australia; one species is found in New Guinea and the Solomon Islands; one species in Vanuatu and New Caledonia; and A. stellata is found in Australia, New Caledonia and into the Pacific as far as Hawaii and Henderson Island. Keys and...
Tipo: Article / Letter to the editor
Palavras-chave: Alyxia; Apocynaceae; Australia; New Caledonia; Pacific Islands; Taxonomic revision.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/524530

Revision of Ryssopterys and transfer to Stigmaphyllon (Malpighiaceae)
Provedor de dados: 16
Autores: Anderson, C.
Molecular evidence shows the Old World genus Ryssopterys (Malpighiaceae) nested within the New World genus Stigmaphyllon; therefore, Ryssopterys is here transferred to Stigmaphyllon as subg. Ryssopterys. The subgenera share most vegetative and fruit characters. Subgenus Stigmaphyllon comprises 92 species characterized by hermaphrodite, bilaterally symmetrical flowers. Subgenus Ryssopterys includes 21 species that appear androdioecious but are probably functionally dioecious; the flowers are either hermaphrodite but likely functionally female, owing to inaperturate pollen, or male with a rudimentary gynoecium. All species have radially symmetrical flowers in which all parts of each floral whorl are equal; they lack calyx glands as well as the stylar...
Tipo: Article / Letter to the editor
Palavras-chave: Androdioecy; Australia; Dioecy; Indonesia; Malpighiaceae; New Caledonia; New Guinea; Ryssopterys; Stigmaphyllon.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/524543

Anchimolgus gratus n. sp. (Copepoda: Poecilostomatoida: Anchimolgidae), associated with the scleractinian coral Lithactinia novaehiberniae in New Caledonia
Provedor de dados: 16
Autores: Humes, Arthur G.
Anchimolgus gratus n. sp., associated with the fungiid coral Lithactinia novaehiberniae Lesson, 1831 in New Caledonia, is distinguished from its congeners (except A. pandus Humes, 1978) by the formula III,I,5 on the third segment of the exopod of leg 4. The new species differs from A. pandus which is much smaller and in which the female genital double-somite is as long as wide.
Tipo: Article / Letter to the editor
Palavras-chave: Copepoda; Poecilostomatoida; Anchimolgus; Associate; Scleractinian coral; New Caledonia.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/503901

Synopsis of lichomolgid copepods (Poecilostomatoida) associated with soft corals (Alcyonacea) in the tropical Indo-Pacific
Provedor de dados: 16
Autores: Humes, A.G.
A synopsis of the 97 species of lichomolgid copepods known to be associated with tropical IndoPacific shallow-water alcyonaceans is given (Madagascar, New Caledonia, Moluccas, Philippines, and Enewetak Atoll). One new genus and 29 new species are included, distributed among the lichomolgid genera Acanthomolgus (2 new species), Alcyonomolgus (1), Colobomolgus (2), Critomolgus (3), Doridicola (5), Paradoridicola (7), Paramolgus (8), and Telestacicola (1). The alcyonacean hosts, numbering more than 100 species, include members of the genera Alcyonium, Anthelia, Capnella, Cespitularia, Cladiella, Dendronephthya, Heteroxenia, Lemnalia, Litophyton, Lobophytum, Nephthea, Paralemnalia, Parerythropodium, Sarcophyton, Sinularia, Siphonogorgia, Stereonephthya,...
Tipo: Article / Letter to the editor
Palavras-chave: Alcyonacea; Soft corals; Poecilostomatoida; Lichomolgidae; Copepoda; Associations; New species; Keys; Indo-Pacific; Madagascar; New Caledonia; Moluccas; Philippines; Enewetak Atoll.; 42.72.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/317742

Overlap of eastern and western mangroves in the South-western Pacific: hybridization of all three Rhizophora (Rhizophoraceae) combinations in New Caledonia
Provedor de dados: 16
Autores: Duke, N.C.
A recent survey of mangroves in New Caledonia located 7 taxa of the genus Rhizophora – with 6 coexisting in one estuary. This is arguably the greatest concentration of co-occurring Rhizophora taxa anywhere. Two are well-known mangrove species of the Indo West Pacific, R. stylosa and R. apiculata, and another, R. samoensis resembles the widespread Atlantic East Pacific species, R. mangle. The other four are hybrid intermediates, R. × lamarckii (= R. stylosa × R. apiculata), R. × selala (= R. stylosa × R. samoensis), and two previously undescribed combinations, R. × tomlinsonii (R. apiculata × R. samoensis) and R. samoensis var. neocaledonica (= R. samoensis × R. × selala). The new entities are unknown elsewhere. While R. × tomlinsonii is considered endemic...
Tipo: Article / Letter to the editor
Palavras-chave: Hybrids; New Caledonia; Rhizophora; Rhizophoraceae; South West Pacific; Taxonomy.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/524545

Melitidae (Crustacea, Amphipoda) from anchihaline limestone caves in New Caledonia
Provedor de dados: 16
Autores: Stock, Jan H.; Iliffe, Thomas M.
Four new species of Melitidae (Amphipoda) are described from anchihaline limestone caves in New Caledonia. Three species are classified with Josephosella Ruffo, 1985 (J. microps n. sp., J. debilis n. sp., and J. proiecta n. sp.) and a new genus, Caledopisa, is erected for the fourth species, C. levis n. sp. The new genus is related to Victoriopisa Karaman &amp; Barnard, 1979.
Tipo: Article / Letter to the editor
Palavras-chave: Cave amphipods; Melitidae; New Caledonia; Josephosella; Caledopisa; Taxonomy.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/504412

Crustacea Copepoda: &lt;i&gt;Amphicrossus pacificus&lt;/i&gt; gen. et sp. nov., an erebonasterid copepod (Poecilostomatoida) from the New Caledonian continental shelf
Provedor de dados: 27
Autores: Huys, R.
A new species of Erebonasteridae, Amphicrossus pacificus, is decribed on the basis of a single female from a depth of 155 m north of New Caledonia in the Grand Passage zone. The new species is closely related to Erebonaster spinulosus Humes and for that reason the latter is transferred to the new genus Amphicrossus. Differences in body ornamentation and armature of maxilla, maxilliped and P4 serve to distinguish Amphicrossus and Erebonaster. Other noticeable discrepancies are found in the structure of the rostrum, the shape of the thoracic epimera and the design of the fifth pair of legs. A peculiar structure, the "sensory area", is shown on the posterior surface of enp-2 P2 in both Amphicrossus species which can be differentiated from each other on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: New genera New species ISEW; New Caledonia.
Ano: 1991
URL: http://www.vliz.be/imisdocs/publications/266847.pdf