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Registros recuperados: 8
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Applications of an Indian Ocean Observing System to Climate Impacts and Resource Predictions in Surrounding Countries in the Context of ENSO-Monsoon Teleconnections OceanDocs
Jury, M.; Gadgil, S.; Meyers, G.; Ragoonaden, S.; Reason, C.; Sribimawati, T.; Tangang, F..
We explore the path between Indian Ocean observations and monsoon dynamics, the societal impacts of interannual climate variations and applications of resource predictions in southeastern Africa, the Mascarene Islands, India, southeast Asia and Australia. Recent progress in understanding ocean dynamics associated with SST variation is reviewed. The global El Niño-Southern Oscillation (ENSO) affects monsoon winds and ocean temperatures in a manner consistent with, but lagging, the Pacific. The ENSO influence often propagates across the tropical Indian Ocean from Africa to Indonesia, modulating the tropospheric moisture flux over the Indian Ocean and rainfall in surrounding continents. An east-west dipole in SST anomalies and monsoon rainfall is identified...
Palavras-chave: Indian ocean; Climate impacts; SST patterns; ENSO responses.
Ano: 2000 URL: http://hdl.handle.net/1834/762
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Characterization of thirteen new polymorphic microsatellite markers from the honeycomb grouper Epinephelus merra ArchiMer
Muths, Delphine; Bourjea, Jerome.
Epinephelus merra (Serranidae) is the most common and widespread species of this genus, mostly found in reef habitats from South Africa to Central Pacific. Thirteen polymorphic microsatellite loci were isolated and characterized from this species. Polymorphism was studied in two localities from the Comoros archipelago-Moh,li and Moroni. Allelic diversity was 7.5, polymorphism ranging from 3 to 13 alleles. Overall heterozygosity was high with an average observed heterozygosity of 0.587. Three of these loci were characterised by heterozygote deficiencies for both populations. Finally, ten of the 13 developed primers could be used in future population genetics study of E.merra that might be useful in a context of marine biodiversity conservation.
Tipo: Text Palavras-chave: Microsatellite; Epinephelus merra; Reef fish; Indian ocean.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00044/15529/12957.pdf
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Deep diving behavior observed in yellowfin tuna (Thunnus albacares) ArchiMer
Dagorn, Laurent; Holland, Kim N.; Hallier, Jean-pierre; Taquet, Marc; Moreno, Gala; Sancho, Gorka; Itano, David; Aumeeruddy, Ryaz; Girard, Charlotte; Million, Julien; Fonteneau, Alain.
Yellowfin tuna (Thunnus albacares) are known to preferentially occupy the Surface mixed layer above the thermocline and it has been Suggested that they are physiologically restricted to water lerriperatt.11-CS no more than 8 degrees C colder than Surface waters. However, we here report for dive data acquired from a large yellowfin tuna which demonstrate for the first time that this species is indeed capable of making prolonged dives into deep cold waters. A yellowfin tuna (134 cm fork length) caught near ail anchored fish aggregating device (FAD) in the Seychelles (Western Indian Ocean) was equipped with all internally implanted archival tag and released. The fish was recaptured 98 days later. As predicted for this species, this fish spent 85% of its time...
Tipo: Text Palavras-chave: Indian ocean; Yellowfin tuna; Swimming speed; Diving behavior; Vertical movements; Archival tap.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1402.pdf
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Inventaire des poissons récoltés lors de l'éruption volcanique d'avril 2007 du piton de la Fournaise (Ile de la Réunion) ArchiMer
Durville, Patrick; Mulochau, Thierry; Barrere, Alain; Quod, Jean-pascal; Spitz, Jerôme; Quero, Jean-claude; Ribes, Sonia.
An important eruption of Piton de La Fournaise on the Reunion Island started at April 2007. A large number of killed fishes were found floating on the sea infront of lava flows. More than 400 specimens were caught: 81 species for 42 families were identified. In the majority, these were deep species living between -100m and -1000m depth. 47 species are new for the ichthyologic fauna of the Reunion Island and about 12 species are probably new for the Science. This phenomenon, known from Hawaii and Galapagos, was not yet observed at the Reunion Island.
Tipo: Text Palavras-chave: Nouvelles espèces; Poissons profonds; Eruption volcanique; Piton de La Fournaise; La Réunion; Océan Indien; New species; Deep fish; Volcanic eruption; Piton de La Fournaise; La Réunion; Indian ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6604.pdf
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Ocean-Atmosphere Coupling in the Monsoon Intraseasonal Oscillation: A Simple Model Study ArchiMer
Bellon, Gilles; Sobel, Adam H.; Vialard, Jerome.
A simple coupled model is used in a zonally symmetric aquaplanet configuration to investigate the effect of ocean-atmosphere coupling on the Asian monsoon intraseasonal oscillation. The model consists of a linear atmospheric model of intermediate complexity based on quasi-equilibrium theory coupled to a simple, linear model of the upper ocean. This model has one unstable eigenmode with a period in the 30-60-day range and a structure similar to the observed northward-propagating intraseasonal oscillation in the Bay of Bengal/west Pacific sector. The ocean-atmosphere coupling is shown to have little impact on either the growth rate or latitudinal structure of the atmospheric oscillation, but it reduces the oscillation's period by a quarter. At latitudes...
Tipo: Text Palavras-chave: Madden julian oscillation; Tropical circulation model; Sea surface temperature; Asian summer monsoon; Convective perturbations; Walker circulation; Radiation budget; Indian ocean; Variability; Simulation.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00185/29637/27987.pdf
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Régime alimentaire de poissons carnivores des récifs coralliens de Nouvelle Calédonie ArchiMer
Kulbicki, M; Bozec, Ym; Labrosse, Pierre; Letourneur, Y; Mou-tham, G; Wantiez, L.
A total of 212 carnivorous coastal fish species from New Caledonia, represented by 7335 individuals, were analysed for their diet. Fifty two prey items were identified and later grouped into broader taxonomic categories refered as "prey types". For each fish species 6 biological traits were defined: maximum adult size, major biotope, schooling behaviour, home range, nycthemeral behaviour, degree of crypticity. A general linear model was fit to the diet data taking into account these traits, and depth of capture and fish family. This model was applied to the average number of prey types/stomach and to the volume of 5 prey types: nekton, crustaceans. molluscs, echinoderms, worms. A second analysis was performed on the effect of observed size on diet...
Tipo: Text Palavras-chave: Coral reefs; Fish diet; Trophic level; Indian ocean.
Ano: 2005 URL: https://archimer.ifremer.fr/doc/00608/71965/70663.pdf
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Structure et connectivité de la mégafaune marine à l’échelle d’une région océanique. Enjeux pour la gestion durable des tortues vertes dans l’océan Indien occidental ArchiMer
Bourjea, Jerome.
This thesis is a comprehensive work aiming to improve scientific knowledge on the green turtle (Chelonia mydas) in order to provide key scientific evidences needed for the implementation of coherent and effective management measures to protect at the Western Indian Ocean scale this threatened species. In a first step, this work aimed to established baseline data on the abundance of green turtles nesting females and long term trends of some key nesting populations of the region by applying different modelling methods. In a second step, this work determined the regional genetic structure of this species and the relationships that exists between the different populations. Finally, the conservation of marine turtles being closely dependant to external...
Tipo: Text Palavras-chave: Tortues marines; Tortue verte; Chelonia mydas; Mégafaune; Évaluation de population; Tendance sur long terme; Structure génétique; Génétique des populations; Capture accidentelle; Biologie de la conservation; Unité de gestion; Océan Indien; Marines turtles; Green turtle; Chelonia mydas; Megafauna; Population assessment; Long term trend; Genetic structure; Population genetic; By-catch; Incidental catch; Biological conservation; Management units; Indian ocean.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00244/35505/34009.pdf
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Un modèle général de d'évolution de l'océan indien ArchiMer
Sahabi, Mohamed.
The last global synthesis of the evolution of the Indian ocean which satisfactorily describes the kinematics of the five major plates, up to the initial stages, dates back to Norton and Sclater [1979]. Although the most recent phases of evolution have been largely detailed, in particular in the proximity of the triple junction, the initial stages of evolution have been generally described by models quite speculative and generally only constrained by pairs of plates. The recentmost gravity data based on the altimetric satellites SEASAT, GEOSAT and ERS1 [Sandwell and Smith, 1992] give an homogenoeus image of sea-floor topography. These data, declassified to the south of 30°S, reveal previously unknowkn features of the sea-floor fabric and allow to further...
Tipo: Text Palavras-chave: Indian ocean; Model; Map; Fracture zone; Intraplate deformation; Kinematics; Ocean Indien; Modellisation; Carte; Zone fracture; Faille transformante; Cinématique.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/these-614.pdf
Registros recuperados: 8
Primeira ... 1 ... Última
 

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