Éditeur(s) : James K. Simon James K. Simon ( Philadelphia )
Résumé : (Internal Comments) Images completed; returned to Baldwin 6/24/04
(Statement of Responsibility) by Thomas Day ; illustrated with fine plates.
"The only complete edition published in the United States"--T.p.
Illustrations chromolithographed by P.S. Duval.
United States -- Pennsylvania -- Philadelphia

Droits : This item is presumed to be in the public domain. The University of Florida George A. Smathers Libraries respect the intellectual property rights of others and do not claim any copyright interest in this item. Users of this work have responsibility for determining copyright status prior to reusing, publishing or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions may require permission of the copyright holder. The Smathers Libraries would like to learn more about this item and invite individuals or organizations to contact The Department of Special and Area Studies Collections (special@uflib.ufl.edu) with any additional information they can provide.
AAA8109
ALK0516
05076672
002248791

Résumé : (Biographical) Planter and attorney.
(Biographical) Achille eventually settled in Florida, first in St. Augustine, and afterwards at Wascissa, Florida, near Tallahassee. On July 12, 1826, he married Catherine Daingerfield Willis Gray, a distant niece of George Washington. Achille made his living as a planter and an attorney, published his observations on life in America, and made numerous trips back to Europe, involving himself in various intrigues against the French monarchy.
(Biographical) Because of his father's title as King of Naples, Floridians often referred to Murat and his wife as the Prince and Princess of Tallahassee. He was one of the most colorful and opinionated settlers in territorial Florida.
(Language) The bulk of the material is in French, but some of the correspondence is translated into English.
France
Florida
Florida
Wascissa
United States
United States
Florida
Florida
France
Leon
12073
St Johns
12109

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
We introduce the Convex Circuit-Free coloration and Convex Circuit-Free chromatic numberView the MathML source of an oriented graph View the MathML source and establish various basic results. We show that the problem of deciding if an oriented graph verifies View the MathML source is NP-complete if k≥3, and polynomial if k≤2. We introduce an algorithm which finds the optimal convex circuit-free coloration for tournaments, and characterize the tournaments that are vertex-critical for the convex circuit-free coloration.
ISSN: 0195-6698

hal-00716574
https://hal.archives-ouvertes.fr/hal-00716574
DOI : 10.1016/j.ejc.2008.02.012

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Before attaining the mantle wedge, where they trigger partial melting, volatiles released from dehydration reactions in the slab have to migrate across a relatively cold (<750 degrees C), peridotite-layer above the incoming slab. In order to unravel the mechanisms allowing for this initial stage of fluid transport, we performed a detailed field and microstructural study of metamorphic prograde peridotites in the Cerro del Almirez ultramafic massif (Betic Cordillera, Spain), where evidences of one of the most important dehydration reactions in subduction zones, the high-pressure antigorite breakdown (P = 1.6-1.9 GPa and T approximate to 680 degrees C), can be mapped in the field. This reaction led to arborescent growth of centimeter-size olivine and orthopyroxene, producing a chlorite-harzburgite with a spinifex-like texture. Microstructural observations and crystal preferred (CPO) mapping show no evidences of solid-state deformation during the prograde growth of olivine and orthopyroxene at the expenses of antigorite. However, a few tens to a hundred meters away from the reaction front, the metamorphic texture is partially obliterated by grain-size reduction in roughly planar conjugate zones, a few mm to meters wide. Grain size reduction zones (GSRZ) are characterized by (1) sharp contacts with undeformed spinifex-like texture domains, (2) important reduction of the olivine grain size (60-250 mu m), (3) olivine color change from brownish to colorless, (4) decrease in the modal amount of orthopyroxene, and (5) at the mm- to cm-scale, irregular shapes and abrupt terminations. Field and microstructural observations exclude that relative displacement took place across these GSRZ. Changes in modal composition imply reactions with fluids undersaturated in silica. Analysis of olivine crystal-preferred orientations (CPO) in GSRZ shows patterns similar, but more dispersed, than those in neighboring spinifex-like domains. It also reveals mm- to cm-scale discrete domains with rather homogeneous crystallographic orientations suggesting inheritance from the preexisting spinifex-like olivines in the host peridotite. Misorientation angles between neighboring grains in the GSRZ show peaks at similar to 5-10 degrees and similar to 20 degrees, but rotations are not crystallographically controlled. Based on these observations, we rule out the formation of the GSRZ by dynamic recrystallization during dislocation creep and propose that they record brittle deformation (microcraking) of the spinifex-like chlorite-harzburgite, probably induced by hydrofracturing at high pressure and relative low temperature conditions (680-710 degrees C). High-pressure hydrofracturing can, thus, be invoked as an efficient mechanism for fluid flow across the cold top-slab mantle layer, hence allowing the slab-derived fluids to ingress in the wedge.
ISSN: 0012-821X

hal-00534035
https://hal.archives-ouvertes.fr/hal-00534035
DOI : 10.1016/j.epsl.2010.06.029

Éditeur(s) : HAL CCSD Oxford University Press (OUP)
Résumé : International audience
The newly-desribed Centropyge cocosensis has long been considered a variant of the lemonpeel pygmy angelfish C. flavissima because of their overall similarity in color patterns. DiBattista and co-authors [J. Hered. 107 (2016) 647–653] recently contested the validity of C. cocosensis, based on arguments that are challenged here.
ISSN: 0022-1503

ird-01525431
http://hal.ird.fr/ird-01525431
http://hal.ird.fr/ird-01525431/document
http://hal.ird.fr/ird-01525431/file/Letter%20to%20Editor_JHered%20p%20haL.pdf
DOI : 10.1093/jhered/esx008

Éditeur(s) : Springer
Résumé : The structure and summertime production of planktonic communities and the role of nondiatom planktonic cells were studied in coastal ponds, which are areas traditionally used for fattening and greening table-sized oysters. The abundance and biomass of nano-microplanktonic protists were determined at weekly intervals between February 1998 and February 1999 in a coastal pond without oysters in the French Atlantic coast near La Rochelle. The production of these microbiotas was determined in the summer period. The structure of plankton communities revealed the following observations: (1) microphytoplanktonic cells were mostly diatoms and dinoflagellates, (2) microzooplanktonic cells were mainly ciliates, and (3) nanoplanktonic cells were represented by pigmented (80-90% of the nanoplankton biomass) and colorless nanoflagellates. Diatoms were dominated by Naviculiineae. Dinoflagellates were dominated by Peridiniales. Oligotrichida were predominant in the ciliate community. Protist biomass levels were nine times higher from April to August (summer period 1033 mu g C L-1) than from September to March (winter period 114 mu g C L-1). Whatever the season, nanoflagellates were dominant in the water column (66 and 53% of the entire protist biomass in the summer and winter periods, respectively). Nanoflagellates represented the highest production of nano-microplanktonic communities (76% of carbon protist production) in the coastal pond in summer and showed the shortest generation time (7.1 h). Dinoflagellates came after nanoflagellates in production (19.5% of carbon protist production). Diatoms represented only a supplementary carbon resource available for higher trophic levels, whereas, until now, they were considered as the principal food of oysters in coastal ponds. Ciliates were a small source of carbon, but their growth rate was high. We suggest, first, that nanoflagellates represented the primary resource available in the pond and could constitute an important food resource for higher trophic levels, such as oysters, farmed in this type of pond. Overall, the system appeared to be more autotrophic than heterotrophic. Because inorganic nutrients are quickly exhausted in a semiclosed pond, pigmented flagellates dominated the carbon biomass, production and biomass of bacteria were high (thus, the microbial food web appeared to be active in this pond), and mixotrophy seemed to be an important trophic mode there.
Microbial Ecology (0095-3628) (Springer), 2007-05 , Vol. 53 , N. 4 , P. 537-548

Droits : 2007 Springer
http://archimer.ifremer.fr/doc/2007/publication-2641.pdf
DOI:10.1007/s00248-006-9087-z
http://archimer.ifremer.fr/doc/00000/2641/

Éditeur(s) : Pêche thonière et dispositifs de concentration de poissons, Caribbean-Martinique, 15-19 Oct 1999 15-19 octobre 1999
Résumé : Since the early 1990s, drifting Fish Aggregating Devices, or FADs, have rapidly become the dominant type of floating object used by the purse seine fishery in the Eastern Pacific Ocean to capture tunas. The development of this fishery for larger vessels is described using data collected by observers aboard vessels of more than 363 metric tons fish-carrying capacity. Bamboo rafts, equipped with radio-transmitters that allow for semi-continuous monitoring, are typically used as FADs. Old purse seine netting is often suspended below the bamboo raft to give the FAD an enhanced underwater profile. Similar to the fishery on flotsam between 1992-1998, most sets on FADs were made before 8 am, with skipjack and bigeye being the dominant tuna species caught, and yellowfin tuna captured in lesser amounts. Discard ratios of skipjack and bigeye were comparable for the two modes of fishing; however, the success rate on FADs for bigeye was more than twice that on non-FAD floating objects ("logs"). In addition, the fishery on logs was largely a coastal hshery, while the fishery on FADs extended west to 150 W, into areas that had not been significantly utilized by the purse seine fleet. The capture of tunas per set varied most with area, season and year. Nonetheless, capture per set for at least one of the three tuna species was also found to vary with the depth of the purse seine net and the amount of the netting hanging below the FAD. The effect of net depth and FAD depth on tuna capture varied by area, season and FAD color.

Droits : Ifremer
http://archimer.ifremer.fr/doc/00042/15282/12668.pdf
http://archimer.ifremer.fr/doc/00042/15282/

Résumé : Les phénomènes de coloration des eaux marines au voisinage des côtes, des estuaires, à l'intérieur des baies, lagunes ou ouvrages portuaires, sont connus depuis longtemps. Neanmoins, leur fréquence augmentant depuis quelques années sur le littoral français, des risques d'intoxications par ingestion de bivalves contaminés similaires à celles que connaissent régulièrement les Etats-Unis et le Canada, sont à craindre. De fait, si bon nombre de ces phénomènes "d'eaux rouges" restent sans effet après leur disparition, certains, par contre, peuvent entraîner des mortalités d'animaux marins, ou pire encore, de graves empoisonnements chez les consommateurs de "fruits de mer", du fait de l'énorme pouvoir concentrateur des bivalves.

Droits : info:eu-repo/semantics/openAccess
http://archimer.ifremer.fr/doc/00046/15774/13176.pdf
http://archimer.ifremer.fr/doc/00046/15774/

Résumé : Le fluide chaud produit par les forages de la centrale géothermique de Bouillante (Guadeloupe) est enrichi en espèces dissoutes telles que la silice qui peuvent précipiter sous forme de dépôts solides lors de son refroidissement et gêner fortement la production électrique. L’un des principaux objectifs de ce travail de thèse a donc été d’améliorer l’état des connaissances sur les conditions physiques, chimiques et cinétiques de la précipitation de la silice amorphe à Bouillante. Après une étude des caractéristiques physico-chimiques des fluides et des dépôts associés au champ de Bouillante, des expériences sur la cinétique de précipitation de la silice, sur site, pour une large gamme de température (25 - 90°C) et de pH (4 - 12) ont été menées et analysées en détail.Pour l’ensemble de ces expériences, seule la polymérisation (réversible) de la silice dissoute, sous forme de suspensions colloïdales très stables en solution, a été observée. La modélisation des données expérimentales de cinétique montre que la vitesse de polymérisation de la silice suit une loi d’ordre 2 vis-à-vis de la silice dissoute jusqu’à l’équilibre en accord avec une dimérisation de la silice. Par contre, durant l’étape initiale de la réaction, une loi d’ordre 4 semble mieux adaptée, suggérant des réactions de polymérisation plus complexes avec formation de tétramères. La température a un effet limité sur la cinétique de polymérisation de la silice comparé à l’effet du pH qui est beaucoup plus important. L’énergie d’activation de la réaction globale est de 41 - 54 kJ pour des pH compris entre 5 et 8.La caractérisation de la silice précipitée a mis en évidence des différences notables entre la structure poreuse de la silice solide prélevée sur les installations de surface et celle de la silice colloïdale obtenue par polymérisation lors des expériences de cinétique, ce qui semble indiquer que des mécanismes différents interviennent dans ces deux contextes de précipitation de la silice dissoute.Le deuxième objectif de cette thèse était d’évaluer la possibilité de valoriser la silice extraite de l’eau géothermale de Bouillante dans un procédé de traitement des eaux naturelles par adsorption. Pour cela, les propriétés d’adsorption de la silice géothermale brute et fonctionnalisée par le poly(ethylèneimine) (ou PEI) ont été étudiées pour deux polluants : un colorant, le bleu de méthylène et un métal lourd, le plomb. Les résultats obtenus montrent que la silice brute possède une grande capacité d’adsorption vis-à-vis du bleu de méthylène. En outre, la fonctionnalisation de la silice par le PEI permet d’améliorer sa capacité d’adsorption vis-à-vis du plomb en solution, en accord avec un modèle cinétique du pseudo-second ordre suggérant une chimisorption. Le modèle d’isotherme de Redlich-Peterson est également en très bon accord avec les données expérimentales.
The hot geothermal fluid produced by the geothermal power plant of Bouillante (Guadeloupe) contains various dissolved components such as silica that can precipitate as solid deposits during their cooling and cause serious problems on the electricity generation. One of the aim of this study is to improve the understanding on the physical, chemical and kinetics conditions of the amorphous silica precipitation in the Bouillante geothermal field. After a study on the physical and chemical characteristics of the Bouillante fluids and deposits which can form during their exploitation, experiments on the kinetics of silica precipitation, on site, under a large range of temperature (25 – 90°C) and pH (4 – 12) have been carried out and analyzed in detail.During on site kinetics experimentations only dissolved silica polymerization (reversible) as colloidal gel, very stable in solution, was observed. Modeling of the experimental data showed that the kinetics polymerization is characterized by a 2-order kinetic law relative to dissolved silica until the equilibrium that is consistent with silica dimerization. On the other side, the initial stage of the reaction is better characterized by a 4-order kinetic law that suggested more complex polymerization reactions with tetramers formation.Temperature has a little effect on the polymerization kinetics compared with the pH which has an effect more important. The activation energy of silica precipitation calculated between 25 and 90°C, is about 41 - 54 kJ for pH ranging to 5 - 8.The characterization of the silica precipitate reveals significant differences in the porous structure of the silica collected on the surface installations and the one obtained from kinetic experiments that suggests different precipitation mechanisms. The second objective of this thesis was to evaluate the possibility to promote geothermal silica for the treatment of natural waters containing contaminants by adsorption. Adsorption properties of the untreated and functionalized by poly(ethylèneimine) (ou PEI) geothermal silica have been investigated for two pollutants: a colorant, the methylene blue and a heavy metal, the lead.Results showed that untreated silica has a great adsorption capacity concerning the methylene blue. Besides, silica functionalization by the PEI allows improving the adsorption capacity for lead in solution. The adsorption kinetics curves followed a pseudo-second order model consistent with a chimisorption. The isotherm model of Redlich-Peterson fitted well the experimental data.

http://www.theses.fr/2014AGUY0698/document

Résumé : Les graphes définis à partir de structures algébriques possèdent d’excellentes propriétés de symétries particulièrement intéressantes. L’exemple le plus flagrant est la notion de graphe de Cayley qui s’est révélée très riche non seulement du point de vue théorique mais aussi pratique par ses applications à de nombreux domaines incluant l’architecture des réseaux ou les machines parallèles. Néanmoins, la régularité des graphes de Cayley se révèle parfois être une limite étant donné qu’ils sont toujours sommet-transitifs et donc en particulier non pertinents pour générer des réseaux semiréguliers.Cette observation a motivé, en 2005, la définition d’une nouvelle classe de graphes définis à partir d’un groupe, appelés G-graphes. Ils possèdent aussi de nombreuses propriétés de régularité mais de manière moins restrictive.Cette thèse propose un nouveau regard sur cette classe de graphes par une approche plutôt orientée recherche opérationnelle alors que la grande majorité des études précédentes est dominée par des approches essentiellement algébriques. Nous-nous sommes alors intéressés à plusieurs questions :— La caractérisation des G-graphes : nous proposons des améliorations par rapport aux précédents résultats.— Identifier des classes de graphes comme des G-graphes grâce à des isomorphismes ou en utilisant le théorème de caractérisation.— Etudier la structure et les propriétés de ces graphes, en particulier pour de possibles applications aux réseaux : colorations semi-régulières, symétries et robustesse.— Une approche algorithmique pour la reconnaissance de cette classe avec notamment un premier exemple de cas polynomial lorsque le groupe est abélien.
Interactions between graph theory and group theory have already led to interesting results for both domains. Graphs defined from algebraic groups have highly symmetrical structure giving birth to interesting properties. The most famous example is Cayley graphs, which revealed to be particularly interesting both from a theoretical and a practical point of view due to their applications in several domains including network architecture or parallel machines. Nevertheless, the regularity of Cayley graphs is also a limit as they are always vertex-transitive and therefore not relevant to generate semi-regular networks. This observation motivated the definition, in 2005, of a new family of graphs defined from a group, called G-graphs. They also have many regular properties but are less restrictive. These graphs are in particular semi-regular k-partite, with a chromatic number k directly given in the group representation and they can be either transitive or not.This thesis proposes a new insight into this class of graphs using an approach based on operational research while most of previous studies have been so far dominated by algebraic approaches. Then, the thesis addresses different kind of questions:— Characterizing G-graphs: we propose improvements of previous results.— Identifying some classes of graphs as G-graphs through isomorphism or using the characterization theorem.— Studying the structure and properties of these graphs, in particular for possible applications to networks: semi-regular coloring, symmetries and robustness.— Algorithmic approach for recognizing this class with a first example of polynomial case when the group is abelian.

http://www.theses.fr/2014AGUY0787/document

Éditeur(s) : HAL CCSD Paris : Muséum national d'histoire naturelle
Résumé : International audience
En prenant comme exemple le gobie à crête Lophogobius cyprinoides (Pallas, 1770), les éléments (canaux et pores et canaux sensoriels muqueux, et papilles sensorielles) composant le système latéral (SL) ont été observés selon plusieurs méthodes de préparation. Des échantillons ont été préparés soit pour observation en microscopie électronique à balayage (MEB), soit pour observation en microscopie photonique après immersion dans du liquide de fixation "Bouin Hollande" ou dans du formol à 4% en eau de mer avant coloration au KMnO4 (technique traditionnelle). Les résultats obtenus avec le MEB et le Bouin Hollande sont meilleurs qu'avec la méthode traditionnelle et présentent une plus grande reproductibilité. Bien que moins rapide et plus onéreuse, la méthode d'évaluation au MEB offre une finesse d'observation qui n'est pas obtenue au Bouin Hollande en raison de la limite du grandissement en microscopie optique. Si l'ultrastructure des papilles sensorielles ne peut être observable qu'au MEB, le SL des poissons Gobiidae peut être facilement étudié de manière approfondie avec les deux méthodologies proposées dans ce travail. Elles sont à préconiser car plus fiables que la technique traditionnelle consistant en une immersion dans une solution de permanganate de potassium et d'acide sulfurique. Celle-ci détériore partiellement les papilles sensorielles du SL rendant son analyse plus délicate.
ISSN: 0399-0974

hal-00749624
https://hal.univ-antilles.fr/hal-00749624

Éditeur(s) : IEEE
Résumé : Two approaches of ocean color data merging were tested and compared in the North and Equatorial Atlantic Basin: the weighted averaging and the objective analysis. The datasets used were the daily level-3 binned data of chlorophyll-a from the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Moderate Resolution Imaging Spectroradiometer on the Aqua satellite over the year 2003, which is the first common full year of operation. Since they represent input for both approaches, matchups between the satellite and the in situ data from the SeaWiFS Bio-optical Archive and Storage System and the Atlantic Meridional Transect were first studied to compute a spatial map of the root mean-square error and of the bias. Because of the log distribution of the chlorophyll fields, each approach was applied to untransformed and log-transformed values. The application of the weighted averaging to log-transformed values does not show significant differences in comparison to its application to untransformed values. This is not the case, however, for the objective analysis that gives better results when applied to logtransformed values. Both approaches give combined chlorophyll data of equivalent quality, although the objective analysis could be improved with a better statistical characterization of noise and signal covariance. The main advantage of the objective analysis is its ability to interpolate in space (and time) by taking into account the characteristic scales of chlorophyll-a. As a result, the spatial coverage of the combined data is at least twice as large in the case of objective analysis than weighted averaging. OCR NOT CONTROLLED
IEEE (0196-2892) (IEEE), 2006-11 , Vol. 44 , N. 11 , P. 3436-3451

Droits : 2006 IEEE
http://archimer.ifremer.fr/doc/2006/publication-3631.pdf
DOI:10.1109/TGRS.2006.878441
http://archimer.ifremer.fr/doc/00000/3631/

Éditeur(s) : Springer
Résumé : While it is well known that the ocean is one of the most important component of the climate system, with a heat capacity 1,100 times greater than the atmosphere, the ocean is also the primary reservoir for freshwater transport to the atmosphere and largest component of the global water cycle. Two new satellite sensors, the ESA Soil Moisture and Ocean Salinity (SMOS) and the NASA Aquarius SAC-D missions, are now providing the first space-borne measurements of the sea surface salinity (SSS). In this paper, we present examples demonstrating how SMOS-derived SSS data are being used to better characterize key land–ocean and atmosphere–ocean interaction processes that occur within the marine hydrological cycle. In particular, SMOS with its ocean mapping capability provides observations across the world’s largest tropical ocean fresh pool regions, and we discuss from intraseasonal to interannual precipitation impacts as well as large-scale river runoff from the Amazon–Orinoco and Congo rivers and its offshore advection. Synergistic multi-satellite analyses of these new surface salinity data sets combined with sea surface temperature, dynamical height and currents from altimetry, surface wind, ocean color, rainfall estimates, and in situ observations are shown to yield new freshwater budget insight. Finally, SSS observations from the SMOS and Aquarius/SAC-D sensors are combined to examine the response of the upper ocean to tropical cyclone passage including the potential role that a freshwater-induced upper ocean barrier layer may play in modulating surface cooling and enthalpy flux in tropical cyclone track regions.
Surveys In Geophysics (0169-3298) (Springer), 2014-05 , Vol. 35 , N. 3 , P. 681-722

Droits : Springer Science+Business Media Dordrecht 2013
http://archimer.ifremer.fr/doc/00152/26334/24430.pdf
DOI:10.1007/s10712-013-9244-0
http://archimer.ifremer.fr/doc/00152/26334/

Éditeur(s) : Elsevier
Résumé : In biological modelling of the coastal phytoplankton dynamics, the light attenuation coefficient is often expressed as a function of the concentrations of chlorophyll and mineral suspended particulate matter (SPM). In order to estimate the relationship between these parameters over the continental shelf of the northern Bay of Biscay, a set of in situ data has been gathered for the period 1998-2003 when SeaWiFS imagery is available. These data comprise surface measurements of the concentrations of total SPM, chlorophyll, and irradiance profiles from which is derived the attenuation coefficient of the photosynthetically available radiation, K-PAR. The performance of the IFREMER look-up table used to retrieve the chlorophyll concentration from the SeaWiFS radiance is evaluated on this new set of data. The quality of the estimated chlorophyll concentration is assessed from a comparison of the variograms of the in situ and satellite-derived chlorophyll concentrations. Once the chlorophyll concentration is determined, the non living SPM, which is defined as the SPM not related to the dead or alive endogenous phytoplankton, is estimated from the radiance at 555 nm by inverting a semi-analytic model. This method provides realistic estimations of concentrations of chlorophyll and SPM over the continental shelf all over the year. Finally, a relationship, based on non living SPM and chlorophyll, is proposed to estimate K-PAR on the continental shelf of the Bay of Biscay. The same formula is applied to non living SPM and chlorophyll concentrations, observed in situ or derived from SeaWiFS radiance.
Remote Sensing of Environment (0034-4257) (Elsevier), 2005-03 , Vol. 95 , N. 1 , P. 29-46

Droits : 2004 Elsevier Inc. All rights reserved
http://archimer.ifremer.fr/doc/2005/publication-1172.pdf
DOI:10.1016/j.rse.2004.11.007
http://archimer.ifremer.fr/doc/00000/1172/

Éditeur(s) : Société Française d'Ichtyologie
Résumé : In the present paper a new genus, Diretmoides, and a new species, Diretmoides parini, of the berycomorph family Diretmidae is described. The hitherto single genus of the family, Diretmus Johnson, 1863, therefore becomes monotypic while the new genus includes two species pauciradiatus (Woods, 1973) and parini sp. nov. The genus Diretmus is mainly charactcrized by three features (1) by its anus placed immediately anterior to the anal fin, (2) by a prepelvic ridge of ventral scutes and (3) by the high number of bony lamellae on the upper third of the operculum. The species of Diretmoides on the other hand have (1) their anus midway between the pelvics and the anal fin, (2) the ventral midline anterior to their pelvics is flat and is covered by normal body-scales and (3) there are only a few lamellae on the upper third of the operculum. Juveniles of the two Diretmoides-species differ from each other in their colour pattern,the adolescents and adults in meristic characters. All described species live meso-to bathypelagically. D. argenteus is widely distributed in tropical and temperate waters of all oceans. The two Diretmoides -species also live in the Atlantic as well as in the Pacific. However there is only one record of Diretmoides parini and none of D. pauciradiatus from the Indian Ocean. In addition to the described species, indication is given of the presumable existence of a third Diretmoides-species from off Japan. Artificial keys to adults and juveniJes are given at the end of this paper. NOT CONTROLLED OCR
Les auteurs décrivent un nouveau genre, Diretmoides, et une nouvelle espèce, Diretmoides parini. Le genre Diretmus ne comprend plus qu'une seule espèce D. argenteus Johnson, 1863; Diretmoides en comporte deux;D. pauciradiatus (Woods, 1973) d D. parini n.sp. Le genre Diretmus est caractérisé principalement par la position de l'anus juste en avant de l'anale par la présence en avant des pelviennes d'une carène épineuse ventrale et par la densité des lamelles osseuses sur le tiers supérieur de l'opercule. Chez Diretmoides l'anus est à mi-distance entre l'anale et les pelviennes; il n'y a pas de carène épineuse ventrale en avant des pelviennes et, sur le tiers supérieur de l'opercule, les lamelles osseuses sont peu nombreuses et éparses. Les jeunes Diretmoides se distinguent les uns des autres par leur coloration, les adolescents et les adultes par leurs caractères méristiques. Tous les Diretmidés actuellement connus sont des espèces méso à bathypélagiques. D. argenteus est largement distribué dans les eaux tropicales et tempérées de tous les océans. Les deux espèces de Diretmoides ont été signalées dans l'Atlantique et te Pacifique mais on ne connaît qu'une seule capture de D. parini dans l'océan indien et aucune de D. pauciradiatus. En outre. l'étude d'exemplaires provenant du Japon a amené les auteurs à souligner l'existence probable d'une troisième espèce de Diretmoides. Deux clés de détermination, l'une pour les adultes, l'autre pour les jeunes des trois espèces décrites, sont données à la fin de cette note. OCR NON CONTRÔLE
Cybium (Société Française d'Ichtyologie), 1981 , Vol. 5 , N. 1 , P. 33-60

Droits : 1981 Société Française d'Ichtyologie
http://archimer.ifremer.fr/doc/1981/publication-3746.pdf
http://archimer.ifremer.fr/doc/00000/3746/

Éditeur(s) : HAL CCSD Kasetsart University
Résumé : http://www.ceropath.org/references/rodent_protocols_book
Technical book
"Protocols for field and laboratory rodent studies" present the best practices for the studies of rodents and rodent-borne pathogens and parasites from the field to the laboratory. It aims at covering the different steps of rodent studies: 1) Trapping, 2) Dissection and preparation of tissue samples for pathogens screening, 3) Identification of species, 4) Isolation of helminths, 5) Preparing rodent specimens for collections. This book gathers accurate recommendations and techniques, based on those generally accepted in the literature and adapted from the experience of the different authors during rodent surveys and laboratory work. Its presentation is designed to work in the fields with a clear and colorful organization of each chapter, with: inserts providing definitions and recommendations, protocols detailed step by step, and an emphasis on illustrations with several photographs. This book is a publication generated by the CERoPath project (Community Ecology of Rodents and their Pathogens in a changing environment, www.ceropath.org) funded by the French Ministry of Research from 2008 to 2011.
http://hal.ird.fr/ird-00714514

ird-00714514
http://hal.ird.fr/ird-00714514
http://hal.ird.fr/ird-00714514/document
IRD : fdi:010056183

Éditeur(s) : HAL CCSD American Geophysical Union (AGU) American Geophysical Union
Résumé : International audience
Environmental magnetism of speleothems is still in its early stage of development. Here we report on our investigation of the environmental and paleomagnetic information that has been recorded in speleothems, and what are the factors that control its preservation and reliability. To address these issues, we used a multidisciplinary approach, including rock magnetism, petrography, scanning electron microscopy, stable carbon and oxygen isotope compositions, and major and trace element concentrations. We applied this to a set of samples from different stages of speleothem evolution: present-day dripwater (glass plates), a weathered stalactite, a fresh stalagmite, cave sediments, and terra rossa soils. These samples come from the Penico and Excentricas caves, located in two distinct aquifers of the Algarve region, South Portugal. Our results show that the main magnetic carriers of the speleothems under study are primary (detrital) and consist of maghemite (and magnetite?). Similarities in coercivity and temperature dependence of the studied set of samples suggest that iron oxides are inherited from the terra rossa soils that cap the cave and were transported to the speleothems by dripwater. Hence, they represent a regional environmental signature. Interestingly, a stable and probably detrital remanent magnetization could be isolated in the fresh stalagmite, whereas the weathered stalactite yielded chaotic magnetic directions and very low remanent intensities. We propose that these low intensities can be the result from (i) different remanence acquisition mechanisms between stalagmite and stalactite and/or (ii) iron dissolution by fungal activity. We also suggest that magnetic properties and color and the content in detrital elements in the fresh speleothem inform about environmental processes acting on the interface of rock (soil)-atmosphere, while oxygen isotope composition and alkaline-earth element concentrations inform about calcite-water interaction processes. These results provide a better understanding of how environmental information is recorded in speleothems and what the factors are that control the reliability of the paleomagnetic and paleo-environmental signal.
ISSN: 0148-0227

hal-01114953
https://hal.archives-ouvertes.fr/hal-01114953
DOI : 10.1002/2014JB011381

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
The biogeochemistry of sulfur and carbon during early-diagenetic processes within organic-rich marine mangrove sediments was studied in the “Manche à Eau” lagoon, Guadeloupe, West Indies. These sediments are characterized by a total organic carbon content (TOC) mostly above 11 wt%, δ13CTOC below − 25‰ VPDB and C/Nmolar ratios exceeding 15. Rates of mangrove-derived organic carbon accumulation vary between ~ 200 and 400 gOC·m− 2·yr− 1, with highest rates at the shore of the lagoon. On the lagoon border, where colorless filamentous sulfur-oxidizing bacteria colonize the sediments, active sulfate reduction within the upper 20 cm, with a net removal rate of ~ 0.5 μmol·cm− 3·d− 1, is assumed to be essentially driven by organic carbon oxidation. This is expressed by relatively low apparent sulfur isotope fractionation (34εnet = − 33‰) and a gentle δ18O/δ34Ssulfate apparent slope of 0.36 ± 0.03 (2s). Further inside the lagoon, in the absence of sulfur-oxidizing bacteria, higher apparent sulfur isotope fractionation and a steeper δ18O/δ34Ssulfate slope (0.67 ± 0.20) suggest an overall lower sulfate removal rate that may be coupled to minor sulfur disproportionation. Spatial and vertical variation in sulfur cycling, reflected by oxygen and sulfur isotopic characteristics, seem to be mainly controlled by unsteady to relatively steady organic matter deposition and its reactivity. In all sediments, δ34S values of pyrite are positively correlated with the TOC/TS ratio and negatively correlated with δ13CTOC; suggesting a primary control of the quantity and quality of organic matter on the pyrite isotope records, despite potential iron-limiting conditions for the most active sites. Our results provide insights into the role of organic carbon input on sulfur cycling; stimulating sulfate reduction and in turn the presence of sulfur-oxidizing microbial mats, resulting in an intense cycling of both carbon and sulfur in these marine mangrove sediments.
ISSN: 0009-2541

hal-01507696
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01507696
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01507696/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01507696/file/Cr%C3%A9mi%C3%A8re%20et%20al.%20-%20Sulfur%20diagenesis%20under%20rapid%20accumulation%20of%20orga.pdf
DOI : 10.1016/j.chemgeo.2017.02.017

Éditeur(s) : Centre Océanologique de Bretagne
Résumé : Après une période de croissance rapide depuis la seconde guerre mondiale, l'exploitation des ressources vivantes des océans est stabilisée depuis quelques années entre 60 et 65 millions de tonnes par an, pour l'ensemble des océans. Ces chiffres recouvrent l'ensemble des produits tirés de la mer, qu'il s'agisse de vertébrés ou d'invertébrés, d'animaux ou de végétaux. De même, la distinction entre produit de la pêche et produit de la culture ou de l'élevage n'est pas faite. En réalité, si les poissons représentent une partie importante de ce total, l'homme exploite également la plupart des groupes zoologiques d'invertébrés marins, quelques reptiles et les mammifères marins (cétacés et pinnipèdes), et des algues (en particulier des algues rouges et des algues brunes). Dans la plupart des cas, ces groupes sont exploités en vue de l'alimentation humaine ; il existe toutefois d'autres formes d'utilisation de certaines espèces, l'une des plus connues étant l'utilisation des algues pour la production d'alginates, de carragen et d'agar-agar. L'utilisation de certaines espèces de gastéropodes marins pour la fabrication de colorants remonte en Méditerranée a l'époque antique (la pourpre). L'utilisation de coquillages à des fins décoratives ou même en tant que monnaie d'échange a été très répandue chez les populations des îles du Pacifique ; la collection de l'amateur moderne, comportant des pièces atteignant une valeur élevée, peut être considérée comme un dérivé récent de ces usages traditionnels. Afin de ne pas alourdir l'exposé, nous limiterons volontairement cet inventaire aux algues et aux invertébrés, utilisés dans l'alimentation humaine, à l'exclusion des autres formes d'utilisation (1). [OCR NON CONTRÔLE]
Recueil des travaux du Centre Océanologique de Bretagne (Centre Océanologique de Bretagne), 1971 , N. 5 , P. 527-537

Droits : Centre Océanologique de Bretagne
http://archimer.ifremer.fr/doc/1971/publication-5110.pdf
http://archimer.ifremer.fr/doc/00000/5110/

Éditeur(s) : Université de Nantes
Résumé : The reproductive cycle of Megathura crenulata was documented and quantification of oocyte lipid reserves with lipo-specific stains was explored in both this species and in Crassostrea gigas. The necessity of providing food to female broodstock C. gigas in spring was re-evaluated, because subsequent larval and post-larval rearing performance was not affected by broodstock starvation during conditioning. Developmental study of the organs responsible of particle processing in C. gigas allowed the identification of critical stages related to the ontogenesis of each organ, as well as a better understanding of the evolution of these organs, highly-modified in the Ostreidae. Ciliary type identification and mucocyte mapping from post-larval to adult stage showed that the heterorhabdic specialization precedes the anatomic formation of gill plicae specific to this condition.
Le cycle reproducteur de Megathura crenulata a été documenté et la quantification des réserves ovocytaires par des colorants lipospécifiques a été tentée, sans résultats concluants pour cette espèce, ni pour Crassostrea gigas. L'intérêt d'une alimentation des géniteurs femelles C. gigas au printemps est re-évalué, car la performance ultérieure des élevages larvaires et post-larvaires n'a pas été affectée par le jeûne imposé lors du conditionnement. L'étude du développement des organes impliqués dans le traitement des particules chez C. gigas a permis d'identifier des stades critiques associés à l'ontogenèse de chaque organe, ainsi qu'une meilleure compréhension de l'évolution de ces organes si particuliers chez les Ostreidae. L'examen des types ciliaires et la cartographie des mucocytes de la post-larve à l'adulte ont montré que la spécialisation hétérorhabdique précède même la formation anatomique des plis branchiaux caractéristiques de cette condition.

Droits : info:eu-repo/semantics/openAccess
http://archimer.ifremer.fr/doc/2005/these-1371.pdf
http://archimer.ifremer.fr/doc/00000/1371/