Consulta: creatorFacets:"Methou, Pierre"
Registros recuperados: 3
Data/hora: 01/06/2024 08:49:26

Is It First the Egg or the Shrimp? – Diversity and Variation in Microbial Communities Colonizing Broods of the Vent Shrimp Rimicaris exoculata During Embryonic Development
Provedor de dados: 5
Autores: Methou, Pierre; Hernández-ávila, Ivan; Aube, Johanne; Cueff-gauchard, Valerie; Gayet, Nicolas; Amand, Louis; Shillito, Bruce; Pradillon, Florence; Cambon-bonavita, Marie-anne.
Rimicaris exoculata is one of the most well-known and emblematic species of endemic vent fauna. Like many other species from these ecosystems, Rimicaris shrimps host important communities of chemosynthetic bacteria living in symbiosis with their host inside the cephalothorax and gut. For many of these symbiotic partners, the mode of transmission remains to be elucidated and the starting point of the symbiotic relationship is not yet defined, but could begin with the egg. In this study, we explored the proliferation of microbial communities on R. exoculata broods through embryonic development using a combination of NGS sequencing and microscopy approaches. Variations in abundance and diversity of egg microbial communities were analyzed in broods at...
Tipo: Text
Palavras-chave: Hydrothermal; Shrimp; Microbial colonization; Alvinocarididae; Egg development.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60067/63352.pdf

Integrative taxonomy revisits the ontogeny and trophic niches of   Rimicaris   vent shrimps
Provedor de dados: 5
Autores: Methou, Pierre; Michel, Loic; Segonzac, Michel; Cambon-bonavita, Marie-anne; Pradillon, Florence.
Among hydrothermal vent species, Rimicaris exoculata is one of the most emblematic, hosting abundant and diverse ectosymbioses that provide most of its nutrition. Rimicaris exoculata co-occurs in dense aggregates with the much less abundant Rimicaris chacei in many Mid-Atlantic Ridge vent fields. This second shrimp also houses ectosymbiotic microorganisms but has a mixotrophic diet. Recent observations have suggested potential misidentifications between these species at their juvenile stages, which could have led to misinterpretations of their early-life ecology. Here, we confirm erroneous identification of the earliest stages and propose a new set of morphological characters unambiguously identifying juveniles of each species. On the basis of this...
Tipo: Text
Palavras-chave: Hydrothermal vents; Stable isotopes; Taxonomy; Crustaceans; Life history; Trophic shift.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75227/75368.pdf

Antimicrobial Peptides and Ectosymbiotic Relationships: Involvement of a Novel Type IIa Crustin in the Life Cycle of a Deep-Sea Vent Shrimp
Provedor de dados: 5
Autores: 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