|
|
|
| Registros recuperados: 27 | |
|
|
| Komai, Tomoyuki; Segonzac, Michel. |
| Nautilocaris saintlaurentae gen. nov, sp. nov, is described and illustrated from hydrothermal vents in the North Fiji Basin and Lau Basin in the south-western Pacific. This new taxon is assigned to the Alvinocarididae. It has a well-developed, dorsally dentate rostrum, carapace with pterygostomian spine present, eye broadly fused mesially, epipod-setobranch complex present above pereopods, and appendix internae on second to fourth pleopods greatly reduced. This combination of characters places it in an intermediate position between a group of species in the genus Alvinocaris with well developed, dorsally, dentate rostrum, carapace with pterygostomian spine present, eyes narrowly fused mesially, epipod-setobranch complex absent and well-developed appendices... |
| Tipo: Text |
Palavras-chave: Pacifique; Hydrothermal vent; Alvinocarididae; Taxinomy; Anatomy. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-430.pdf |
| |
|
|
| Stohr, Sabine; Segonzac, Michel. |
| The animal communities associated with the deep-sea reducing environment have been studied for almost 30 years, but until now only a single species of ophiuroid, Ophioctenella acies, has been found at both hydrothermal vents and methane cold seeps. Since the faunal overlap between vent and seep communities is small and many endemic species have been found among other taxa (e.g. Mollusca, Crustacea), additional species of ophiuroids were expected at previously unstudied sites. Chemical compositions at reducing sites differ greatly from the nearby bathyal environment. Generally, species adapted to chemosynthetic environments are not found in non-chemosynthetic habitats, but occasional visitors of other bathyal species to vent and seep sites have been... |
| Tipo: Text |
Palavras-chave: Habitat description; Distribution record; Seeps; Methane; Hydrothermal vents; Ophiuroids. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-427.pdf |
| |
|
|
| Pond, David W; Bell, Michael V; Dixon, David R; Fallick, Anthony E; Segonzac, Michel; Sargent, John R. |
| Fatty acid biomarker analysis coupled with gas chromatography-isotope ratio mass spectrometry was used to confirm the presence of methanotrophic and thiotrophic bacterial endosymbionts in the tissues of a hydrothermal vent mussel (Bathymodiolus sp.), collected from the Menez Gwen vent field on the mid-Atlantic ridge, Monounsaturated (n-8) fatty acids, which are diagnostic of methanotrophic bacteria, were detected in all three types of tissues examined (gill, posterior adductor, and mantle), although levels were highest in gill tissues where the bacteria were found, Stable-carbon-isotope compositions (delta-C-13 per mille relative to that of Peedee belemnite) of fatty acids for all three tissues ranged from -24.9 to -34.9%., which encompasses the range... |
| Tipo: Text |
|
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00448/55922/57836.pdf |
| |
|
| |
|
|
| Khripounoff, Alexis; Vangriesheim, Annick; Crassous, Philippe; Segonzac, Michel; Lafon, V; Waren, A. |
| In order to provide information on the production and the distribution of hydrothermal particulate and biological material produced by deep-sea hydrothermal vents, three moorings with sediment traps and currentmeters were deployed for one year in the Azores Triple Junction region. Two moorings were positioned close to two hydrothermal vent fields at the Mid-Atlantic Ridge (Rainbow, 36 degrees 14'N, 33 degrees 54'W, 2250 in depth and Lucky Strike 37 degrees 17'N, 32 degrees 17'W, 1600 in depth). A third was moored out of the influence of the Rainbow vents representing the reference of the pelagic flux in this area. At the Rainbow field, particulate flux (range 341-634 g m(-2)d(-1)) showed a high temporal variation controlled essentially by the current... |
| Tipo: Text |
Palavras-chave: Bivalve reproduction; Bivalve larvae; Particle composition; Particle flux; Currents; Deep sea hydrothermal vents. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4059.pdf |
| |
|
|
| Macpherson, E; Segonzac, Michel. |
| Twenty-two species of the genus Munidopsis from the Atlantic Ocean are studied. Five new species are described (M. anemia, M. exuta, M. hirtella, M. laurentae and M. truculenta), and diagnoses and illustrations of some relatively rare species (M. acuminata, M. bairdii, M. livida, M. parfaiti and M. thieli) are provided. None of the species discussed here is restricted to a particular habitat, including species collected from hydrothermal vent (M. acutispina, M. exuta) and cold seep areas (M. acutispina, M. geyeri, M. hirtella, M. livida, M. marionis). The new records of some species greatly extend the previously known distribution range of the species (i.e., M. abyssicola, M. aries, M. bairdii, M. geyeri, M. livida, M. parfaiti, M. thieli). Finally, some... |
| Tipo: Text |
Palavras-chave: Hydrothermal vents; New species; Munidopsis; Galatheidae; Anomura; Decapoda; Crustacea. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-1812.pdf |
| |
|
|
| Storh, Sabine; Segonzac, Michel. |
| Prior to this study, two species of ophiuroid had been described from hydrothermal vent sites, and another from methane cold seeps, all from the Atlantic Ocean. Although ophiuroids have occasionally been reported from vents in the Pacific Ocean as well, none has been described before. This study presents two new species, Spinophiura jolliveti gen. et sp. nov., family Ophiuridae, and Ophiolamina eprae gen. et sp. nov., family Ophiacanthidae, which are most likely endemic to reducing environments in the East Pacific. We also include detailed descriptions of the post-metamorphic development of these species. Spinophiura jolliveti is characterized by up to five rather long, semi-erect arm spines and a relatively small oral shield. Its postlarva is unusual in... |
| Tipo: Text |
Palavras-chave: Cold seep; Hydrothermal vent; Taxonomy; Morphology; SEM; Ophiacanthidae; Ophiuridae; Postlarval development; Brittle stars. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-6475.pdf |
| |
| Registros recuperados: 27 | |
|
|
|
