Wide-Geographic and Long-Term Analysis of the Role of Pathogens in the Decline of Pinna nobilis to Critically Endangered Species
Navas, José I.
Valencia, José M.
García-March, José R.
A mass mortality event (MME) affecting the fan mussel Pinna nobilis was first detected in Spain in autumn 2016 and spread north- and eastward through the Mediterranean Sea. Various pathogens have been blamed for contributing to the MME, with emphasis in Haplosporidium pinnae, Mycobacterium sp. and Vibrio spp. In this study, samples from 762 fan mussels (necropsies from 263 individuals, mantle biopsies from 499) of various health conditions, with wide geographic and age range, taken before and during the MME spread from various environments along Mediterranean Sea, were used to assess the role of pathogens in the MME. The number of samples processed by both histological and molecular methods was 83. The most important factor playing a main role on the onset of the mass mortality of P. nobilis throughout the Mediterranean Sea was the infection by H. pinnae. It was the only non-detected pathogen before the MME while, during MME spreading, its prevalence was higher in sick and dead individuals than in asymptomatic ones, in MME-affected areas than in non-affected sites, and it was not associated with host size, infecting both juveniles and adults. Conversely, infection with mycobacteria was independent from the period (before or during MME), from the affection of the area by MME and from the host health condition, and it was associated with host size. Gram (-) bacteria neither appeared associated with MME.
574 - Ecologia general i biodiversitat
Is part of
Frontiers in Marine Science
Grau, Amalia, Antonio Villalba, José I. Navas, Beatriz Hansjosten, José M. Valencia, José R. García-March, and Patricia Prado et al. 2022. "Wide-Geographic And Long-Term Analysis Of The Role Of Pathogens In The Decline Of Pinna Nobilis To Critically Endangered Species". Frontiers In Marine Science 9. doi:10.3389/fmars.2022.666640.
Grant agreement number
MITECO/ / /ES/Estrategias Marinas de España, protegiendo el mar para todos/EsMarEs
EC/LIFE/LIFE 15 IPE-ES-000012/EU/Integrated, Innovative and participatory Management for N2000 networking in the Marine Environment/LIFE-IP INTEMARES
MITECO/Programa de Investigación en la Red de Parques Nacionales/OAPN 024-2010/ES/Estado de conservación del bivalvo amenazado Pinna nobilis en el Parque Nacional de Cabrera/
INIA/Programa Estatal de promoción del talento y su empleabilidad en I+D+I/ /ES/ /
EC/INTERREG Balkan-Mediterranean 2014-2020/MIS 5017160/EU/Regional Cooperation for the transnational ecosystem sustainable development/RECONNECT
Aigües Marines i Continentals
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