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| Le Bloa, Simon; Boidin-wichlacz, Céline; Cueff-gauchard, Valerie; Rosa, Rafael Diego; Cuvillier-hot, Virginie; Durand, Lucile; Methou, Pierre; Pradillon, Florence; Cambon-bonavita, Marie-anne; Tasiemski, Aurélie. |
| The symbiotic shrimp Rimicaris exoculata dominates the macrofauna inhabiting the active smokers of the deep-sea mid Atlantic ridge vent fields. We investigated the nature of the host mechanisms controlling the vital and highly specialized ectosymbiotic community confined into its cephalothoracic cavity. R. exoculata belongs to the Pleocyemata, crustacean brooding eggs, usually producing Type I crustins. Unexpectedly, a novel anti-Gram-positive type II crustin was molecularly identified in R. exoculata. Re-crustin is mainly produced by the appendages and the inner surfaces of the cephalothoracic cavity, embedding target epibionts. Symbiosis acquisition and regulating mechanisms are still poorly understood. Yet, symbiotic communities were identified at... |
| Tipo: Text |
Palavras-chave: Extreme; Hydrothermal; Symbiosis; Host-microbe interaction; Invertebrate immunity; Crustacean. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00643/75534/76413.pdf |
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| Auguste, M.; Mestre, N. C.; Rocha, T. L.; Cardoso, C.; Cueff-gauchard, Valerie; Le Bloa, Simon; Cambon-bonavita, Marie-anne; Shillito, B.; Zbinden, M.; Ravaux, J.; Bebianno, M. J.. |
| In light of deep-sea mining industry development, particularly interested in massive-sulphide deposits enriched in metals with high commercial value, efforts are increasing to better understand potential environmental impacts to local fauna. The aim of this study was to assess the natural background levels of biomarkers in the hydrothermal vent shrimp Rimicaris exoculata and their responses to copper exposure at in situ pressure (30 MPa) as well as the effects of depressurization and pressurization of the high-pressure aquarium IPOCAMP. R. exoculata were collected from the chimney walls of the hydrothermal vent site TAG (Mid Atlantic Ridge) at 3630 m depth during the BICOSE cruise in 2014. Tissue metal accumulation was quantified in different tissues... |
| Tipo: Text |
Palavras-chave: Deep-sea mining; Hydrothermal vents; Biomarkers; Ipocamp; Copper; TAG. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00323/43465/42869.pdf |
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| Le Bloa, Simon; Durand, Lucile; Cueff-gauchard, Valerie; Le Bars, Josiane; Taupin, Laure; Marteau, Charlotte; Bazire, Alexis; Cambon-bonavita, Marie-anne. |
| Rimicaris exoculata is a caridean shrimp that dominates the fauna at several hydrothermal vent sites of the Mid-Atlantic Ridge. It has two distinct and stable microbial communities. One of these epibiontic bacterial communities is located in the shrimp gut and has a distribution and role that are poorly understood. The second colonizes its enlarged gill chamber and is involved in host nutrition. It is eliminated after each molt, and has colonization processes reminiscent of those of a biofilm. The presence and expression of genes usually involved in quorum sensing (QS) were then studied. At four sites, Rainbow, TAG, Snake Pit and Logatchev, two lux genes were identified in the R. exoculata epibiontic community at different shrimp molt stages and life... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00377/48841/49268.pdf |
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