Article
Fisheries
Hebing Wang, Ben Yang, Xin Li, Qi Li, Shikai Liu
Summary: This study investigated the pathogenic factors associated with mass summer mortality of Pacific oysters, identifying several Vibrio species as pathogens affecting oysters. Experimental challenge trials revealed different levels of pathogenicity among the Vibrio strains, with V. alginolyticus exerting the highest pathogenicity. These findings provide valuable information for disease surveillance in oyster aquaculture.
AQUACULTURE REPORTS
(2021)
Article
Environmental Sciences
Kevin Tallec, Marta Gabriele, Ika Paul-Pont, Marianne Alunno-Bruscia, Arnaud Huvet
Summary: Tire leachates have a significant impact on the clearance and respiration rates of oysters, but do not affect absorption efficiency. The disruption of energy balance by tire leachates may affect the overall functions of oysters.
MARINE POLLUTION BULLETIN
(2022)
Article
Fisheries
Yong Chi, Gaowei Jiang, Yuanxin Liang, Chengxun Xu, Qi Li
Summary: Selective breeding has shown promising results in improving summer survival in Pacific oysters. The study found that summer survival has a moderate heritability and a positive correlation with growth traits. The realized genetic gain of summer survival increased over generations, indicating the effectiveness of the breeding program.
Article
Fisheries
Yong Chi, Hang Yang, Chenyu Shi, Ben Yang, Xianchao Bai, Qi Li
Summary: The global oyster industry faces challenges due to frequent occurrences of summer massive mortalities. Selective breeding of disease-resistant oyster lines using marker-assisted selection programs could be a key strategy to address this problem. To identify candidate genes associated with disease resistance, a comparative transcriptome analysis of the most resistant and susceptible oyster families was conducted. The study revealed that genes related to innate immunity, thermal tolerance, antioxidant responses, and detoxification showed differential expression in resistant families, providing new insights into summer mortality resistance.
Article
Chemistry, Applied
Han Li, Xiaoyu Xia, Zhenyu Wang, Jiachen Zang, Ming Du
Summary: The study investigated the structure and stability characteristics of oyster ferritin by adding Fe2+ to it. The results showed that the protein structure of ferritin remained largely unchanged after adding Fe2+ and the sample with 1000 Fe2+ exhibited good stability under storage and high temperature conditions.
Article
Food Science & Technology
Roni Nugraha, Thimo Ruethers, Aya C. Taki, Elecia B. Johnston, Shaymaviswanathan Karnaneedi, Sandip D. Kamath, Andreas L. Lopata
Summary: This study investigates the IgE sensitisation profiles of patients with oyster allergy to raw and heated Pacific oyster extract. Tropomyosin is identified as the major allergen responsible for oyster allergy, and the study also reveals partial cross-reactivity and/or co-sensitisation between oyster, prawn, and dust mite allergens. This research emphasizes the importance of using recombinant tropomyosin in improved diagnostics and immunotherapy.
Article
Food Science & Technology
Yuyang Ma, Yahui Wang, Suisui Jiang, Mingyong Zeng
Summary: This study investigated the effect of gelatin on the formation of oyster protein gel and the interaction mechanism between gelatin and oyster protein. The results showed that gelatin improved the texture properties of oyster protein gel and enhanced the gelation process. In addition, new hydrogen bonds and beta-sheets structures were formed between gelatin and oyster protein.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Biology
Carolina Penaloza, Alejandro P. Gutierrez, Lel Eory, Shan Wang, Ximing Guo, Alan L. Archibald, Tim P. Bean, Ross D. Houston
Summary: A chromosome-level assembly for the Pacific oyster (C. gigas) was created and annotated, providing a valuable resource for genetics and genomics studies, as well as selective breeding in aquaculture.
Article
Fisheries
Jiafeng Fang, Chengxun Xu, Qi Li
Summary: This study investigated the effect of inbreeding on gene expression in the Pacific oyster. It was found that there were differentially expressed genes associated with inbreeding depression. This research contributes to a better understanding and management of inbreeding depression in bivalves, and may potentially benefit oyster breeding in aquaculture.
Article
Chemistry, Applied
Han Li, Xiaoyi Tan, Xiaoyu Xia, Jiachen Zang, Hesham El-Seedi, Zhenyu Wang, Ming Du
Summary: By introducing a point mutation, the thermal stability of oyster ferritin was enhanced, thus improving its application as a food ingredient.
Article
Environmental Sciences
Yijing Han, Chaoyi Xie, Nini Fan, Hongce Song, Xiaomei Wang, Yanxin Zheng, Meiwei Zhang, Yaqiong Liu, Baoyu Huang, Lei Wei, Xiaotong Wang
Summary: This study used transmission electron microscopy and staining methods to observe melanin in the mantle tissue of Pacific oysters, and preliminarily confirmed its existence. It provides a foundation for further research on melanin synthesis and shell color formation mechanism.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Chemistry, Medicinal
Floriane Boullot, Caroline Fabioux, Helene Hegaret, Pierre Boudry, Philippe Soudant, Evelyne Benoit
Summary: The study reveals that Pacific oysters have a certain sensitivity to paralytic shellfish toxins, with a micromolar range of sensitivity to saxitoxin but less sensitivity to tetrodotoxin. Oysters can be categorized into STX-resistant and STX-sensitive groups regardless of the diet they consume. Additionally, the study highlights the potential of cerebrovisceral nerves of Pacific oysters for electrophysiological and pharmacological studies and demonstrates that the STX sensitivity of oyster nerves can decrease upon exposure to dinoflagellates.
Article
Fisheries
Zhicheng Guo, Jiejie Sun, Xiaoqian Lv, Tong Zhang, Hongsheng Yao, Wei Wu, Zhen Xing, Ning Kong, Lingling Wang, Linsheng Song
Summary: Ferroptosis is a form of cell death in vertebrates that is dependent on iron and oxidation, typically mediated by redox-related molecules. In this study, homologues of glutathione peroxidase 4 (GPX4) and solute carrier family 7 member 11 (SLC7A11, xCT) were identified from the oyster Crassostrea gigas (designated as CgGPX4 and CgxCT). The mRNA transcripts of CgGPX4 and CgxCT were found in various tissues, with the highest expression in the haemocytes. Treatment with erastin induced ferroptosis in oyster haemocytes, as evidenced by cell malformation, cell death, mitochondrial atrophy, and changes in gene expression.
FISH & SHELLFISH IMMUNOLOGY
(2023)
Article
Fisheries
Yan Wang, Dianli Zhao, Jingjie Hu, Zhenmin Bao, Mengqiang Wang
Summary: This study identified differentially expressed proteins in oyster exosomes post bacterial stimulation, revealing the involvement of various proteins in the immune response. The results contribute to a better understanding of the immune functions of oyster exosomes against bacterial infection.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Review
Food Science & Technology
Bertoka Fajar Surya Perwira Negara, Md. Mohibbullah, Jae-Hak Sohn, Jin-Soo Kim, Jae-Suk Choi
Summary: Pacific oysters have high nutritional value and various bioactive components, including proteins, glycogen, minerals, and fatty acids. The bioactive components exhibit antimicrobial, antioxidant, and anti-inflammatory effects. However, most studies on the bioactivity of Pacific oysters are conducted in vitro.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Fisheries
Lionel Degremont, Elise Maurouard, Antoine Jourdan, Jean-Baptiste Lamy, Pierre Boudry
Summary: The study found simultaneous hermaphrodite individuals in Pacific oysters, and demonstrated the feasibility of producing inbred lines through two successive generations of self-fertilization. The observed inbreeding coefficient of the offspring was lower than expected, suggesting better survival of heterozygous offspring due to inbreeding depression. This study highlights the potential for higher heterozygosity in inbred lines of Pacific oysters produced by self-fertilization.
Article
Environmental Sciences
Rossana Sussarellu, Tiphaine Chouvelon, Yann Aminot, Jerome Couteau, Geraldine Loppion, Lionel Degremont, Jean-Baptiste Lamy, Farida Akcha, Julien Rouxel, Clothilde Berthelin, Tifanie Briaudeau, Urtzi Izagirre, Aourell Mauffret, Anne Grouhel, Thierry Burgeot
Summary: This study investigated the bioaccumulation abilities and biomarker responses in Mytilus edulis, Mytilus galloprovincialis, and their hybrids through in situ transplantation experimentation on their progenies. Variations in contaminant bioaccumulation and different biomarker responses were observed between Mytilus species in the field, highlighting the importance of including data on species or the presence of hybrid individuals in biomonitoring programs databases. Differences in contamination levels were contaminant-specific, with higher levels of certain contaminants observed in different species or hybrids.
ENVIRONMENTAL POLLUTION
(2022)
Article
Microbiology
Marion Soree, Francois Delavat, Christophe Lambert, Solen Lozach, Mathias Papin, Bruno Petton, Delphine Passerini, Lionel Degremont, Dominique Hervio Heath
Summary: The study revealed that oysters grown in controlled environments accumulated more Vibrio parahaemolyticus than those grown in intertidal environments, possibly due to immune priming in the latter. However, both types of oysters showed similar depuration rates for V. parahaemolyticus.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Infectious Diseases
Isabelle Arzul, Celine Garcia, Bruno Chollet, Delphine Serpin, Coralie Lupo, Mathilde Noyer, Delphine Tourbiez, Chloe Berland, Lionel Degremont, Marie-Agnes Travers
Summary: The presence of Haplosporidium costale in Pacific cupped oyster Crassostrea gigas in France has been confirmed for the first time, using a combination of microscopy, PCR, and sequencing techniques. A TaqMan real-time PCR assay has been developed for rapid and specific detection of the parasite. The assay revealed that the parasite has been present in French oyster populations since at least 2008.
TRANSBOUNDARY AND EMERGING DISEASES
(2022)
Article
Fisheries
Marion Soree, Anna Le Meleder, Elise Maurouard, Solen Lozach, Mathias Papin, Christophe Stavrakakis, Corinne Audemard, Dominique Hervio Heath, Lionel Degremont
Summary: In this study, we evaluated the impact of ploidy in Crassostrea gigas oysters on contamination with indigenous Vibrio parahaemolyticus (Vp) and on the accumulation and depuration of Vp in laboratory experiments. The results showed that ploidy did not significantly influence contamination by indigenous Vp, although triploid oysters had a lower contamination trend in November. The pathogenic profiles of indigenous Vp varied between seasons, and depuration was higher during the summer months.
Article
Evolutionary Biology
Tim P. Bean, Arnaud Tanguy, Carolina Penaloza, Manu Kumar Gundappa, Isabelle Boutet, Ross D. Houston, Daniel J. Macqueen, Pierre Boudry
Summary: This article introduces the publication of two genomes for the European native flat oyster Ostrea edulis, which is a species of significant evolutionary, ecological, and commercial importance. Two independent research groups decided to collaborate and publish separate genome resources for the research community, recognizing the benefit of benchmarking the assemblies together.
EVOLUTIONARY APPLICATIONS
(2022)
Article
Microbiology
Lizenn Delisle, Olivier Laroche, Zoe Hilton, Jean-Francois Burguin, Anne Rolton, Jolene Berry, Xavier Pochon, Pierre Boudry, Julien Vignier
Summary: The role of oyster microbiota in Pacific oyster mortality syndrome (POMS) is not fully understood. This study describes the temporal kinetics of POMS and the changes in microbiota during infection, and identifies both harmful and beneficial bacteria that may influence disease outcomes. These findings open new perspectives on using microbiome composition as a screening tool for shellfish health and predicting oyster vulnerability to POMS.
MICROBIOLOGY SPECTRUM
(2022)
Article
Biology
Ewan Harney, Samuel P. S. Rastrick, Sebastien Artigaud, Julia Pisapia, Benoit Bernay, Philippe Miner, Vianney Pichereau, Oivind Strand, Pierre Boudry, Gregory Charrier
Summary: Ocean acidification and warming are important stressors for marine organisms. Different populations of great scallops from France and Norway showed varying responses to temperature and PCO2 variation, with French spat exhibiting more metabolic plasticity but decreased survival compared to Norwegian spat under elevated temperature. Understanding the acclimatization potential and physiological plasticity among populations is crucial in predicting species responses to climate change.
JOURNAL OF EXPERIMENTAL BIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Aurelie Mesnil, Maude Jacquot, Celine Garcia, Delphine Tourbiez, Lydie Canier, Audrey Bidois, Lionel Degremont, Deborah Cheslett, Michelle Geary, Alessia Vetri, Ana Roque, Dolors Furones, Alison Garden, Petya Orozova, Isabelle Arzul, Mathieu Sicard, Guillaume M. Charriere, Delphine Destoumieux-Garzon, Marie-Agnes Travers
Summary: This article investigates the evolutionary mechanisms of Vibrio aestuarianus, a pathogen causing oyster mortality in France and Ireland, and reveals its classical epidemic population structure. The acquisition of a copper-containing island may have facilitated the emergence of pathogenic lineages specialized in oysters.
Article
Fisheries
Antoine Jourdan, Romain Morvezen, Florian Enez, Pierrick Haffray, Adeline Lange, Emilie Vetois, Francois Allal, Florence Phocas, Jerome Bugeon, Lionel Degremont, Pierre Boudry
Summary: Selective breeding programs have been initiated for the Pacific oyster Crassostrea gigas, using genomic tools to improve growth and disease resistance. The study evaluated the potential of genomic selection (GS) for growth-related and shell color traits in commercially selected populations. The results showed a high correlation between growth-related traits and low correlation with color traits. The accuracy of prediction was higher with the genomic model compared to the classical model, indicating the potential of GS in mixed-family breeding programs for C. gigas.
Article
Multidisciplinary Sciences
Daniel Oyanedel, Arnaud Lagorce, Maxime Bruto, Philippe Haffner, Amandine Morot, Yannick Labreuche, Yann Dorant, Sebastien de La Forest Divonne, Francois Delavat, Nicolas Inguimbert, Caroline Montagnani, Benjamin Morga, Eve Toulza, Cristian Chaparro, Jean-Michel Escoubas, Yannick Gueguen, Jeremie Vidal-Dupiol, Julien de Lorgeril, Bruno Petton, Lionel Degremont, Delphine Tourbiez, Lea-Lou Pimpare, Marc Leroy, Oceane Romatif, Juliette Pouzadoux, Guillaume Mitta, Frederique Le Roux, Guillaume M. Charriere, Marie-Agnes Travers, Delphine Destoumieux-Garzon
Summary: In Pacific Oyster Mortality Syndrome (POMS), Vibrio harveyi and ostreid herpesvirus 1 (OsHV-1) are the predominant bacteria causing the disease. V. harveyi synergizes with OsHV-1 by promoting mutual growth and inhibiting oyster's cellular defenses. Furthermore, V. harveyi produces metabolites that benefit the growth of coexisting V. rotiferianus.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Fisheries
Philine S. E. zu Ermgassen, Asa Strand, Nienke Bakker, Ainhoa Blanco, Kruno Bonacic, Pierre Boudry, Gianni Brundu, Tom C. Cameron, Iarfhlaith Connellan, Fiz da Costa, Alison Debney, Monica Fabra, Anamarija Frankic, Celine Gamble, Mathew W. Gray, Luke Helmer, Zoe Holbrook, Tristan Hugh-Jones, Pauline Kamermans, Thorolf Magnesen, Pernille Nielsen, Joanne Preston, Christopher J. Ranger, Camille Saurel, David Smyth, Brecht Stechele, John A. Theodorou, Berenger Colsoul
Summary: The European flat oyster, Ostrea edulis, was historically widespread throughout Europe but its population declined due to various factors. Efforts to restore its habitat have been hindered by the lack of seed supply. Long-term investment in research and production is needed to overcome this bottleneck and meet restoration targets.
AQUATIC LIVING RESOURCES
(2023)
Review
Fisheries
Stephane Pouvreau, Sylvie Lapegue, Isabelle Arzul, Pierre Boudry
Summary: In the past fifty years, numerous research projects have been conducted in France to revive the aquaculture production of the native European flat oyster Ostrea edulis, as well as to study the ecology of local remnant beds and reefs. These projects have focused on controlled reproduction and hatchery technology, understanding and controlling diseases, and developing resistant lines through genetics. This article provides an overview of the major outcomes of these projects in France and discusses prospects for future work in line with the Native Oyster Restoration Alliance and UN Decade for Ecosystem Restoration.
AQUATIC LIVING RESOURCES
(2023)
Article
Microbiology
Camille Clerissi, Xing Luo, Aude Lucasson, Shogofa Mortaza, Julien de Lorgeril, Eve Toulza, Bruno Petton, Jean-Michel Escoubas, Lionel Degremont, Yannick Gueguen, Delphine Destoumieux-Garzon, Annick Jacq, Guillaume Mitta
Summary: The study used metabarcoding and metatranscriptomic approaches to show that the pathogenesis of POMS is conserved across different infectious environments, and identified a core bacterial consortium that plays a role in POMS pathobiota. The core bacteria have complementary metabolic functions and a low competition for nutrients, which allows them to colonize host tissues and contribute to the conservation of POMS pathobiota.