Marteilia refringens is a protozoan parasite recognized as a significant pathogen of the European flat oyster Ostrea edulis. The life cycle of this species is still poorly known, although there is evidence of the need for intermediate host(s). In the present study, we have used molecular approaches to identify this parasite in samples of the dwarf oyster Ostrea stentina after reports of massive mortality along the Tunisian coasts. In 2009 we evaluated the status of O. stentina from Monastir and checked if there was an infection with M. refringens, using polymerase chain reaction assays. Of the 103 tested O. stentina, 85 were PCR-positive using a Marteilia genus-specific assay. Additional assays were subsequently carried out on some samples collected in 2010 in Monastir and processed for histology, transmission electron microscopy and complementary molecular analyses. PCR was carried out to amplify the IGS and ITS regions. Histological and transmission electron microscopy analyses allowed us to confirm the presence of this parasite in the digestive gland tissue of O. stentina and to characterize it at the ultrastructural level. This is the first record of the occurrence of M. refringens in the oyster O. stentina along the Tunisian coasts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jip.2012.11.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cardiac performance mirrors the passive thermal tolerance range in the oyster, Ostrea edulis.
J Exp Biol
December 2024
Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Sections Integrative Ecophysiology and Deep-Sea Ecology & Technology, Am Handelshafen 12, 27515 Bremerhaven, Germany.
Increasing frequencies of heatwaves threaten marine ectotherm species but not all alike. In exposed habitats, some species rely on a higher capacity for passive tolerance at higher temperatures, thereby extending time-dependent survival limits. Here we assess how the involvement of the cardiovascular system in extended tolerance at the margins of the thermal performance curve is dependent on warming rate.
View Article and Find Full Text PDFNutrients and Quality Aspects Characterizing Cultivated in Valli di Comacchio (Northern Italy) Across Different Seasons.
Molecules
November 2024
Department of Environmental and Prevention Sciences, University of Ferrara, Via Luigi Borsari 46, 44121 Ferrara, Italy.
The quality aspects of () cultured in Valli di Comacchio were examined across different seasons. Nutritional quality parameters, antioxidant activity, total carotenoids, and contaminants were determined in winter, summer, and autumn (December, June, and October). Seasonal variations in nutritional parameters were observed.
View Article and Find Full Text PDFGenome-Wide Population Structure in a Marine Keystone Species, the European Flat Oyster (Ostrea edulis).
Mol Ecol
November 2024
National Institute of Aquatic Resources, Technical University of Denmark, Silkeborg, Denmark.
Article Synopsis
- Ostrea edulis, the European flat oyster, has experienced significant population declines over the past 200 years, prompting restoration efforts focused on restocking and conservation.
- This study utilized whole-genome sequencing to identify seven distinct genetic clusters of the oyster, revealing complex population structures and signs of genetic mixing in Scandinavian regions.
- The findings emphasize the need to understand genetic diversity and local adaptation for effective conservation strategies to restore native European flat oyster populations.
Historical dataset details the distribution, extent and form of lost Ostrea edulis reef ecosystems.
Sci Data
November 2024
School of GeoSciences, University of Edinburgh, Edinburgh, Scotland, UK.
Ocean ecosystems have been subjected to anthropogenic influences for centuries, but the scale of past ecosystem changes is often unknown. For centuries, the European flat oyster (Ostrea edulis), an ecosystem engineer providing biogenic reef habitats, was a culturally and economically significant source of food and trade. These reef habitats are now functionally extinct, and almost no memory of where or at what scales this ecosystem once existed, or its past form, remains.
View Article and Find Full Text PDFThe effects of Mid-Holocene foragers on the European oyster in Denmark.
Proc Natl Acad Sci U S A
November 2024
Department of Archaeology, University of York, York YO10 5DD, United Kingdom.
Article Synopsis
- - Oysters are crucial for marine ecosystems as they filter water, create habitats, and recycle nutrients, but their populations in Europe have declined significantly since the 19th and 20th centuries.
- - The field of oyster restoration in aquaculture is gaining attention for its potential to improve ecosystem resilience and biodiversity, yet restoring their populations requires a challenging understanding of historical ecological baselines before human impact.
- - Analysis of over 2,000 ancient oyster shells in Denmark reveals the effects of human harvesting on oyster size and age, indicating that older oysters existed in the Mesolithic era compared to the Neolithic, and offering insights for sustainable harvesting and current restoration efforts amid climate change.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!