期刊
MICROORGANISMS
卷 9, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/microorganisms9050922
关键词
Pinna nobilis; mass mortality; Vibrio spp; Vibrio splendidus; Vibrio mediterranei; Haplosporidium pinnae; Mycobacterium sp; antibiotics
类别
资金
- Operational Program for Fisheries and Maritime 2014-2020 (Measure 6.1.16 Innovation Linked to the Conservation of Marine Biological Resources) [(MIS) 5052394]
- European Maritime and Fisheries Fund (EMFF)
The Pinna nobilis populations are critically endangered in the Mediterranean, with potential etiological factors including parasites and bacteria. The study aims to evaluate the health status of these populations in the Aegean Sea, investigating causes of winter mortalities and bacterial susceptibility.
Pinna nobilis populations, constituting the largest bivalve mollusk endemic to the Mediterranean, is characterized as critically endangered, threatened by extinction. Among the various factors proposed as etiological agents are the Haplosporidium pinnae and Mycobacterium sp. parasites. Nevertheless, devastation of the fan mussel populations is still far from clear. The current work is undertaken under a broader study aiming to evaluate the health status of Pinna nobilis population in Aegean Sea, after the mass mortalities that occurred in 2019. A significant objective was also (a) the investigation of the etiological agents of small-scale winter mortalities in the remaining populations after the devastating results of Haplosporidium pinnae and Mycobacterium sp. infections, as well as (b) the examination of the susceptibility of the identified bacterial strains in antibiotics for future laboratory experiments. Microbiological assays were used in order to detect the presence of potential bacterial pathogens in moribund animals in combination with molecular tools for their identification. Our results provide evidence that Vibrio bacterial species are directly implicated in the winter mortalities, particularly in cases where the haplosporidian parasite was absent. Additionally, this is the first report of Vibrio mediterranei and V. splendidus hosted by any bivalve on the Greek coastline.
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