Eynaud Frédérique, Schmidt Sabine, Iratcabal Vincent, Dubosq Nicolas, Isabelle Billy

The location of two hemipelagic sequences, at the northern and southern edges of the Aquitaine shelf offers the possibility of obtaining a synoptic view of the southern Bay of Biscay oceanography, but also provides access to key contextual elements related to local and global forcing. These sequences were retrieved off the two main fluvial tributaries along the Aquitaine margin (southern Bay of Biscay) from the West Gironde mud patch and from the [...]

MiRNAs are single-stranded short noncoding sequences which display crucial roles on gene transcription regulation in many biological processes especially such as embryonic development, cell proliferation or apoptosis. Also, they are recognized for triggering the host’s internal defence mechanisms and immune cell responses thereby playing crucial role in host-parasite interactions. In the present study, the entire and constitutive set of miRNAs, r [...]

Herault Mikael, Gunathilaka Buddhi e., Fournier Vincent, Le Bris Hervé, Lee Kyeong-Jun

Reducing the reliance of the aquaculture industry on wild fish resources remains a key challenge. Generally obtained from food coproducts, protein hydrolysates have emerged as promising functional and sustainable protein sources that can help compensate for the limitations of alternatives to marine proteins. In this study, we evaluated their use as a palatability enhancer (PE) by top-coating them directly on the feed, as a liquid and at low dose. [...]

Chenal Aliette, Garric Gilles, Testut Charles-Emmanuel, Hamon Mathieu, Ruggiero Giovanni

Sea ice and snow volume are essential variables for polar predictions, but operational systems still struggle to accurately capture their evolution. Satellite measurements now provide estimates of sea ice freeboard and snow depth. The combined assimilation of sea ice concentration (SIC), along-track altimetry radar freeboard data from Cryosat-2 and observations of snow depth from Cryosat-2 and SARAL is implemented in a multivariate approach in a [...]

Masson Sébastien, Jullien Swen, Maisonnave Eric, Gill David, Samson Guillaume

The Weather Research and Forecasting (WRF) model has been widely used for various applications, especially for solving mesoscale atmospheric dynamics. Its high-order numerical schemes and nesting capability enable high spatial resolution. However, a growing number of applications are demanding more realistic simulations through the incorporation of coupling with new model compartments and an increase in the complexity of the processes considered [...]

Contribution au développement et à l'amélioration des techniques d'echantillonnage passif (DGT). Evaluation des performances de "nouveaux" DGT développés pour différents types de contaminants "d'intérêt" dans le cadre de problématiques émergentes

Gonzalez Jean-Louis, Chavanon Fabienne, Marco-Miralles Francoise, Thomas Bastien, Sireau Teddy

L'intérêt des techniques d'échantillonnage passif (POCIS, DGT…) pour obtenir des mesures de concentrations intégrées dans le temps de nombreux contaminants dans divers environnements aquatiques a été démontrée par de nombreux travaux. Mais ces techniques dans ne sont pas adaptées à l'échantillonnage et l'analyse de toutes les familles de contaminants (du fait de phases réceptrices non spécifiques) et de limites liées aux conditions d'utilisation. [...]

Trials and in silico simulations to predict daily photo-oxidative capacity under solar conditions: A case study on the inactivation of an oyster pathogenic bacteria, Vibrio harveyi

Blanchon Cécile, Toulza Eve, Calvayrac Christophe, Stavrakakis Christophe, Eichendorff Stanislawa

In today's world of increasing seafood demand, aquaculture is crucial for food security. High population densities in fish and mollusk farms often cause frequent disease outbreaks, leading to antibiotic use and genetic selection. However, emerging pathogen strains and antibiotic-resistant bacteria necessitate new bio-secure disinfection processes for aquaculture water. Current systems rely on filtration and UVC treatments, but Advanced Oxidation [...]

Evolution de la dynamique du stock de merlan (Merlangius merlangus) en Mer Celtique et Manche Ouest (zone 7b-c,e-k). Réponse à une demande de saisine DGAMPA du 28 octobre 2024

Vermard Youen, Pawlowski Lionel, Robert Marianne

Afin de décrire les évolutions de captures dans les zones de distribution du stock de merlan (Merlangius merlangus) de mer Celtique (zone 7b-c,e-k) les données déclaratives SACROIS et leur ré-allocation spatiale sur une grille 3’*3’ ainsi que les données de campagne scientifiques (campagnes EVHOE et CGFS Manche Ouest) ont été mobilisées. Les données de débarquement montrent une forte diminution des débarquements associés à la zone 27.7fg depuis l [...]

Campagne dédiée à l’évaluation des effets biologiques induits par la contamination chimique en baie de Seine et de Somme. SELIMANCHE 2021

Mauffret Aourell, Akcha Farida, Aminot Yann, Bely Nadege, Benito Denis

Le dispositif « SELI » est mis en place depuis 2017 pour acquérir des données sur les effets biologiques intégrateurs de la contamination chimique chez des organismes marins (poissons et bivalves). Il permet de renseigner la base de données du Conseil International pour l'Exploration de la Mer (CIEM (ICES en anglais)), et ainsi d’alimenter le groupe de travail ICES/BEC (Biological Effect of Contaminants) et de renseigner le descripteur 8 de la Di [...]

Programmation DCE Loire-Bretagne. Stratégie 2025 - Convention Ifremer - AELB

Ce document présente la programmation DCE 2025 prévue dans la convention de coopération Ifremer / AELB

Viana Julie, Evanno Guillaume, Audet Céline, Teletchea Fabrice

Island ecosystems, particularly vulnerable to environmental challenges, host many endangered native species. Diadromous fish, in particular, are threatened throughout their marine and freshwater habitats. The conservation of these species requires an in‐depth understanding of their genetic diversity and structure, to better understand their adaptive potential. We investigated fine‐scale population diversity and structure in native brook charr (Sa [...]

Schechter Matthew s., Trigodet Florian, Veseli Iva a., Miller Samuel e., Klein Matthew l.

The increasing availability of microbial genomes is essential to gain insights into microbial ecology and evolution that can propel biotechnological and biomedical advances. Recent advances in genome recovery have significantly expanded the catalogue of microbial genomes from diverse habitats. However, the ability to explain how well a set of genomes account for the diversity in a given environment remains challenging for individual studies or bi [...]

Koivunen Anna M.a., Cunha Regina l., Quimbayo Juan p., Otero-Ferrer Francisco, Freitas Rui

The swift decline of coral reefs stands out as a significant biodiversity challenge confronting our generation, and mesophotic coral ecosystems (MCEs; reefs between 30 and 150 m) have been proposed as refuge habitats that may be less affected by climate change and human impacts compared to their shallow counterparts. However, MCEs are often distinct from shallow reefs, and studies assessing how marine biodiversity changes along the depth gradient [...]