Academic literature on the topic 'Pinna nobilis'
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Journal articles on the topic "Pinna nobilis"
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Lopez-Nuñez, Raquel, Emilio Cortés Melendreras, Francisca Giménez Casalduero, Patricia Prado, Federico Lopez-Moya, and Luis Vicente Lopez-Llorca. "Detection of Haplosporidium pinnae from Pinna nobilis Faeces." Journal of Marine Science and Engineering 10, no. 2 (February 17, 2022): 276. http://dx.doi.org/10.3390/jmse10020276.
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Pinna nobilis (Linnaeus, 1758) is the largest bivalve endemic to the Mediterranean. It is distributed in a wide range of coastal environments, including estuaries. Pinna nobilis has recently become a critically endangered species (with almost 100% mortality) along the entire Spanish Mediterranean coast. This may be due to coinfections caused by Haplosporidium pinnae and bacterial pathogens such as Mycobacterium spp. We extensively sampled P. nobilis from Mar Menor lagoon (SE Spain), a site where individuals still survive. Using conventional PCR, we found Haplosporidium spp. in 7.1% of mantle and faecal DNA samples in different individuals of P. nobilis. We identified and quantified Haplosporidium pinnae in P. nobilis using Sanger sequencing and qPCR. Faecal H. pinnae detection is non-invasive, unlike biopsies. Therefore, this non-lethal and non-invasive sampling method could contribute to the welfare of living populations, particularly in eutrophic environments, where they are prone to septicaemia. The use of faecal DNA analysis could be a major advance in epidemiology and recovery assessment studies of P. nobilis.
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KERSTING, DIEGO KURT, and ENRIC BALLESTEROS. "Is the local extinction of Pinna nobilis facilitating Pinna rudis recruitment?" Mediterranean Marine Science 22, no. 3 (September 30, 2021): 623. http://dx.doi.org/10.12681/mms.27809.
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Until the late 2010s the spiny fan-mussel Pinna rudis shared habitat in many Mediterranean sites with Mediterranean endemic Pinna nobilis, which dominated in abundance but that has gone locally extinct in most of its distribution area due to a recent widespread disease outbreak. In the Columbretes Islands Marine Reserve (NW Mediterranean) both species coexisted until 2017, when P. nobilis populations completely disappeared. In spring 2021 we revisited 7 permanent plots covering 1,485 m2 that had been previously monitored during the period from 2005 to 2009. We found that although previous studies described P. rudis populations as stable with low recruitment rates, recruitment after 2017 increased in comparison to 2005-2009. At least two cohorts of recruits (~3 and ~1 year in age) were to be found both within the plots as well as in other areas throughout the Columbretes archipelago, colonizing areas previously occupied by P. nobilis. We hypothesize that P. rudis has been benefited by the local extinction of the sibling species P. nobilis, most probably as a result of reduced interspecific competition. The ecological role once played mainly by P. nobilis as the dominant species, might now be taken over by P. rudis, whose populations could grow during the oncoming years.
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Scarpa, Fabio, Daria Sanna, Ilenia Azzena, Davide Mugetti, Francesco Cerruti, Sepideh Hosseini, Piero Cossu, et al. "Multiple Non-Species-Specific Pathogens Possibly Triggered the Mass Mortality in Pinna nobilis." Life 10, no. 10 (October 13, 2020): 238. http://dx.doi.org/10.3390/life10100238.
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The fan mussel, Pinna nobilis, represents the largest bivalve endemic to the Mediterranean Sea. Since 2016, dramatic mass mortality of this species has been observed in several areas. The first surveys suggested that Haplosporidium pinnae (currently considered species-specific) was the main etiological agent, but recent studies have indicated that a multifactorial disease may be responsible for this phenomenon. In this study, we performed molecular diagnostic analyses on P. nobilis, P. rudis, and bivalve heterologous host species from the island of Sardinia to shed further light on the pathogens involved in the mass mortality. The results support the occurrence of a multifactorial disease and that Mycobacterium spp. and H. pinnae are not necessarily associated with the illness. Indeed, our analyses revealed that H. pinnae is not species-specific for P. nobilis, as it was present in other bivalves at least three years before the mass mortality began, and species of Mycobacterium were also found in healthy individuals of P. nobilis and P. rudis. We also detected the species Rhodococcus erythropolis, representing the first report in fan mussels of a bacterium other than Mycobacterium spp. and Vibrio spp. These results depict a complicated scenario, further demonstrating how the P. nobilis mass mortality event is far from being fully understood.
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FOULQUIE, MATHIEU, STÉPHANE COUPE, NARDO VICENTE, and ROBERT BUNET. "First detection of Pinna nobilis infection by Haplosporidium pinnae in the sanctuary area of Thau lagoon, France." Mediterranean Marine Science 24, no. 3 (October 6, 2023): 569–73. http://dx.doi.org/10.12681/mms.32300.
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The noble pen shell Pinna nobilis is an endemic and emblematic giant bivalve whose populations have been recently affected by a mass mortality event (MME), primarily due to the spread of the pathogen Haplosporidium pinnae. Since the beginning of the MME in Spain in 2016, nearly one hundred percent of monitored open sea water populations have been decimated around the Mediterranean Sea. The only refuge areas with living P. nobilis populations were found in coastal lagoons. Today, the Thau lagoon in France is home to a vitally important population of P. nobilis and was thought to be safe from the parasite. Here, we report the first molecular detection of H. pinnae (isolate PN1) in tissue samples of moribund individuals from Thau lagoon.
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Box, Antonio, Xavier Capó, Silvia Tejada, Gaetano Catanese, Amalia Grau, Salud Deudero, Antoni Sureda, and José María Valencia. "Reduced Antioxidant Response of the Fan Mussel Pinna nobilis Related to the Presence of Haplosporidium pinnae." Pathogens 9, no. 11 (November 11, 2020): 932. http://dx.doi.org/10.3390/pathogens9110932.
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The endemic fan mussel (Pinna nobilis) in the Mediterranean Sea is at high risk of disappearance due to massive mortality events. The aim of the study was to evaluate the antioxidant response of P. nobilis collected in the Balearic Islands (Western Mediterranean) before and after the mass mortality event. Individuals collected before (between 2011 and 2012) and after (between 2016 and 2017) the event were analyzed by histological, molecular, and biochemical methods to compare pathogenic loads and biochemical responses. All the individuals collected during 2016–2017 presented symptoms of the disease and were positive for Haplosporidium pinnae, while acid-fast bacteria or/and Gram-negative bacteria were detected in some individuals of both sampling periods. The activities of the antioxidant enzymes catalase and superoxide dismutase in the gills were significantly lower in P. nobilis affected with the parasite compared to those in the asymptomatic ones, while levels of malondialdehyde, as an indicator of lipid peroxidation, were higher in infected individuals. When analyzing the differential effects of H. pinnae and Mycobacterium sp. on P. nobilis, it was observed that significant effects on biomarkers were only observed in the presence of H. pinnae. Co-infection of P. nobilis by H. pinnae with other pathogens such as Mycobacterium sp. constitutes a serious problem due to its high mortality rate in the Balearic Island waters. This concerning situation for P. nobilis is favored by a reduction in antioxidant defenses related to H. pinnae infection that induces oxidative stress and cell damage.
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CINAR, MELIH ERTAN, MURAT BILECENOGLU, MEHMET BAKI YOKEŞ, and HARUN GÜÇLÜSOY. "The last fortress fell: mass mortality of Pinna nobilis in the Sea of Marmara." Mediterranean Marine Science 22, no. 3 (October 14, 2021): 669. http://dx.doi.org/10.12681/mms.27137.
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A spring 2021 cruise to the south Marmara Islands revealed a mass mortality event of Pinna nobilis, which were reported to be healthy just seven months ago. The cause of death might be associated with the epidemic infection or a catastrophic mucilage event seen after November 2020 in the Sea of Marmara. A total of 191 Pinna nobilis individuals were found at seven stations out of 10, of which 88% were dead. In the present study, the population density (dead and alive individuals) of P. nobilis was found to be between 0.3 ind.100 m-2 and 12 ind.100 m-2 in the area. A total of three live and four dead juvenile individuals were observed in the area, indicating low recent recruitment. The highest number of dead Pinna nobilis individuals (92 specimens) was encountered in shallow-waters (0-4 m depth). A total of 34 species belonging to six taxonomic groups (Sipuncula, Oligochaeta, Polychaeta, Crustacea, Mollusca, and Pisces) were found within the dead shells of four P. nobilis individuals. The mass mortality of Pinna nobilis in the Sea of Marmara, the last remaining disease-free sea, indicates the necessity of establishing and implementing emergency action plans for this species, including ex-situ conservation.
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Lattos, Athanasios, Konstantina Bitchava, Ioannis A. Giantsis, John A. Theodorou, Costas Batargias, and Basile Michaelidis. "The Implication of Vibrio Bacteria in the Winter Mortalities of the Critically Endangered Pinna nobilis." Microorganisms 9, no. 5 (April 26, 2021): 922. http://dx.doi.org/10.3390/microorganisms9050922.
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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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Vázquez-Luis, Maite, Gàlia Banach-Esteve, Elvira Álvarez, and Salud Deudero. "Colonization on Pinna nobilis at a marine protected area: extent of the spread of two invasive seaweeds." Journal of the Marine Biological Association of the United Kingdom 94, no. 5 (March 19, 2014): 857–64. http://dx.doi.org/10.1017/s002531541400037x.
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Introduction of species is a major driver of global change and loss of biodiversity in ecosystems. The Mediterranean Sea is the most heavily invaded region in the world by introduced seaweeds. The fan mussel Pinna nobilis is the largest Mediterranean bivalve, and a protected species, present at depths from 0.5 m to 60 m. In Cabrera National Park marine protected area (MPA) (Balearic Islands, north-western Mediterranean) the population of P. nobilis is affected by the invasive seaweeds Lophocladia lallemandii and Caulerpa racemosa; however the extent of this colonization on the bivalve is unknown. Therefore, the main aims of the present study were to: (1) determine the extent of invasion of L. lallemandii and C. racemosa on the P. nobilis population; and (2) test if this invasion showed differences with depth. This is the first study assessing invasion by seaweeds on a large bivalve in a high density P. nobilis population. Pinna nobilis was distributed in all seagrass meadows surveyed within the MPA; we found a total of 872 live P. nobilis individuals, 449 and 423 of which were found at 10 and 20 m depth, respectively. High cover of L. lallemandii and low presence of C. racemosa were detected in the P. nobilis population, being quantified in 49.37% and 1.38% of the population of P. nobilis, respectively. Bathymetric differences on Lophocladia epizoism over P. nobilis has been recorded in this study; with increasing values of L. lallemandii cover index, biomass and volume at deeper depths. Pinna nobilis could be a preferential substratum for L. lallemandii in Posidonia oceanica meadows in deeper waters, acting as a stepping-stone for invasive seaweeds and facilitating the invasion throughout seagrass meadows.
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Mathew, Susan, Jim Peterson, Béatrice de Gaulejac, Nardo Vicente, Michel Denis, Joseph Bonaventura, and Linda L. Pearce. "Manganese and “pinnaglobin” in Pinna nobilis." Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology 113, no. 3 (March 1996): 525–32. http://dx.doi.org/10.1016/0305-0491(95)02077-2.
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Lattos, Athanasios, Konstantinos Feidantsis, Ioannis Georgoulis, Ioannis A. Giantsis, Dimitrios Karagiannis, John A. Theodorou, Alexandra Staikou, and Basile Michaelidis. "Pathophysiological Responses of Pinna nobilis Individuals Enlightens the Etiology of Mass Mortality Situation in the Mediterranean Populations." Cells 10, no. 11 (October 22, 2021): 2838. http://dx.doi.org/10.3390/cells10112838.
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Due to the rapid decrease of Pinna nobilis populations during the previous decades, this bivalve species, endemic in the Mediterranean Sea, is characterized as ‘critically endangered’. In addition to human pressures, various pathogen infections have resulted in extended reduction, even population extinction. While Haplosporidium pinnae is characterized as one of the major causative agents, mass mortalities have also been attributed to Mycobacterium sp. and Vibrio spp. Due to limited knowledge concerning the physiological response of infected P. nobilis specimens against various pathogens, this study’s aim was to investigate to pathophysiological response of P. nobilis individuals, originating from mortality events in the Thermaikos Gulf and Lesvos and Limnos islands (Greece), and their correlation to different potential pathogens detected in the diseased animals. In isolated tissues, several cellular stress indicators of the heat shock and immune response, apoptosis and autophagy, were examined. Despite the complexity and limitations in the study of P. nobilis mortality events, the present investigation demonstrates the cumulative negative effect of co-infection additionally with H. pinnae in comparison to the non-presence of haplosporidian parasite. In addition, impacts of global climate change affecting physiological performance and immune responses result in more vulnerable populations in infectious diseases, a phenomenon which may intensify in the future.
Dissertations / Theses on the topic "Pinna nobilis"
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Gaulejac, Béatrice de. "Etude écophysiologique du mollusque bivalve méditerranéen Pinna nobilis L. Reproduction, croissance, respiration." Aix-Marseille 3, 1993. http://www.theses.fr/1993AIX30077.
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Pinna nobilis l. Mollusque bivalve endemique de mediterranee, figure parmi les plus grands coquillages du monde. Une population dense dans l'etang de diana (corse) a permis d'etudier la sexualite de l'espece. P. Nobilis est hermaphrodite successive a maturation asynchrone, et son cycle sexuel se divise en 4 phases. La periode de maturite estivale semble etre un phenomene general en mediterranee occidentale. Les differents stades de la gametogenese sont decrits par une etude ultrastructurale. Le suivi d'individus marques a permis de retenir le modele de von bertalanffy avec modulation saisonniere comme descripteur de la croissance dans l'etang de diana. Il existe un arret de croissance hivernal non observe en mer ouverte. Des differences morphometriques ont ete mises en evidence entre des populations. Des experiences preliminaires sur la respiration ont ete realisees in situ. La confrontation de tous nos resultats permet d'envisager la culture de p. Nobilis en milieu controle, afin de reintroduire cette espece protegee dans des zones ou elle a disparu
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Meli, Michele. "Monitoraggio di Pinna nobilis nell’Area Marina Protetta Porto Cesareo in ambito Marine Strategy Framework Directive." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13351/.
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Nel corso degli ultimi anni ci si è resi conto che non esistevano direttive nazionali o comunitarie in
grado di limitare sufficientemente le pressioni dell’uomo sulle risorse marine naturali. Occorreva
tutelare l’ambiente marino col fine di preservare la diversità e la vitalità dei mari e degli oceani, in
modo che risultino sempre puliti, sani e produttivi. Inoltre non esistevano basi comuni a tutti gli
Stati europei, o valori soglia in grado di determinare uniformemente la qualità dell’ambiente
marino. Per far fronte a questo problema nel 2008 è stata emanata dall’Unione Europea la Marine
Strategy Framework Directive. Questa direttiva prevede il raggiungimento di un Buono Stato
Ambientale delle acque marine entro il 2020 per tutti gli stati aderenti. La Marine Strategy utilizza
7 programmi riguardanti molti aspetti differenti delle acque marine; tra questi è presente il
programma di monitoraggio delle specie bentoniche protette, tra cui il bivalve Pinna nobilis, specie
inserita anche negli allegati della Direttiva Habitat. Le Aree Marine Protette (AMP) sono
considerate uno strumento efficace di protezione della biodiversità e di gestione delle risorse, date le
restrizioni che possono attuare. Inoltre le AMP dovrebbero costituire un campione rappresentativo
di tutti gli habitat importanti a livello regionale. In questo studio si ha lavorato all’interno dell’Area
Marina Protetta Porto Cesareo, situata in provincia di Lecce. All’interno di questa AMP non sono
stati effettuati studi in passato circa le popolazioni di Pinna nobilis, e si è cominciato a colmare
questa lacuna dopo il recepimento della Direttiva Marine Strategy, che ha imposto il monitoraggio
di questa specie protetta. Lo scopo di questo lavoro è quello di gettare le basi per un futuro continuo
monitoraggio delle popolazioni di Pinna nobilis all’interno dell’AMP Porto Cesareo, quindi definire
i valori soglia da utilizzare in quest’area in ambito della Marine Strategy Framework Directive.
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Capra, Veronica. "Mappatura della popolazione di Pinna nobilis con drone nella zona centro-meridionale della laguna di Venezia." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23073/.
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L’elaborato si concentra sullo studio di una popolazione di Pinna nobilis nella zona centro-meridionale della Laguna di Venezia, in un’area adiacente all’isola di Pellestrina (Italia).
Pinna nobilis (Linneaus 1758) è il più grande mollusco bivalve endemico del Mediterraneo, presente già a partire dalla fine del Miocene. Pinna nobilis, specie protetta dalla Direttiva Habitat (92/43/CEE), recentemente è stata inserita anche nella lista rossa IUNC a causa di eventi di mortalità di massa verificati lungo le coste del Mediterraneo a causa di un agente patogeno.
Da 10-15 anni a questa parte si è osservata una ricolonizzazione in laguna di Venezia.
In questo studio sono impiegate immagini da rilievo UAV per mappare la popolazione di Pinna nobilis e stimare la densità di copertura delle fanerogame marine, la cui presenza è un elemento importante per la stabilità del sedimento di fondo delle lagune. Oltre a indagini direttamente sul campo sono state svolte analisi di laboratorio sui campioni prelevati dall’area di studio in riferimento al contenuto di carbonio organico e alla granulometria dei sedimenti raccolti. Sono stati presi in considerazione 18 anni di dati della sonda multiparametrica Ve3 (Rete SAMANET) di proprietà del Provveditorato Interregionale alle Opere pubbliche del Veneto–Trentino Alto Adige–Friuli Venezia Giulia che consentono di esplorare i diversi fattori ambientali che possono aver influenzato la crescita e la salute di Pinna nobilis nell’area di studio. I risultati mostrano che la popolazione di Pinna nobilis si trova in stretta correlazione con la copertura di fanerogame marine, infatti in aree senza copertura anche il bivalve è assente. In merito ai diversi fattori ambientali indagati, in particolar modo la torbidità, presenta una diminuzione a partire dagli anni 2008/2009 rispetto ai precedenti. I sedimenti analizzati presentano una scarsa percentuale di carbonio organico ma sono caratterizzati dalla frazione sabbiosa (>63μm) superiore all’80%.
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García, March José Rafael. "Aportaciones al conocimiento de la biología de Pinna Nobilis Linneo, 1758 (Mollusca bivalvia) en el litoral mediterráneo ibérico." Doctoral thesis, Universitat de València, 2005. http://hdl.handle.net/10803/10346.
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El molusco bivalvo Pinna nobilis, perteneciente al orden Pterioida, es una especie endémica del Mar Mediterráneo, que suele habitar en las praderas de fanerógamas marinas, donde vive semienterrado, anclado mediante los filamentos del biso. Se trata del molusco más grande del Mediterráneo, ya que puede superar los 80 cm de longitud. El deterioro generalizado de las zonas costeras ha afectado también a esta especie, que ha sido incluida en el Anexo II de la directiva de hábitats, el Anexo IV del Convenio de Barcelona y el Anexo II del Catálogo Nacional de Especies Amenazadas. El presente proyecto de Tesis supone una nueva aportación sobre las características de las poblaciones de esta especie en su medio natural desde un enfoque dinámico, abordando el cambio en el tiempo de una densa población localizada en la ensenada de Moraira (Alicante). Además, se ha profundizado en el estudio de aspectos de su biología y fisiología como el sistema de fijación al sustrato, que ha sido descrito en profundidad, así como la actividad de las valvas y el estudio de la abertura ponderada de las mismas. Por último, se ha estudiado la morfometría dinámica de las valvas, un aspecto muy característico de esta especie, capaz de reconstruir la concha de una forma original, después de grandes procesos de erosión anterior, sin que su característica forma triangular se pierda en el proceso.Los resultados han destacado la gran importancia del hidrodinamismo en la estructura de la población y la existencia de importantes diferencias en la densidad de individuos y la media de tamaños, que aumentan con el incremento de la profundidad. Asimismo, se han observado diferencias muy importantes en las tasas de mortalidad y crecimiento, según la cota de profundidad donde habitan los individuos. El gran número de filamentos que unen al animal al fondo, más de 20.000 y las diversas estrategias de fijación, que se caracterizan por ser muy elaboradas, han hecho suponer que la fijación al sustrato es fundamental para la supervivencia de los individuos, en respuesta a estrés hidrodinámico.El estudio de la actividad de las valvas ha puesto en evidencia que esta especie realiza ciclos circadianos y circalunares, siguiendo estrechamente la posición del Sol y la Luna, de forma que en términos generales, Pinna nobilis cierra las valvas por la noche, excepto cuando la luna está presente en el cielo con el disco iluminado por encima del 50%.Finalmente, el estudio de la morfometría dinámica de la concha ha permitido detectar una serie de registros internos que sirven para estudiar la edad y el crecimiento de los individuos. Además, el descubrimiento de un proceso continuo de neoformación de la concha, mediado por procesos de erosión y reconstrucción anterior, supone una explicación a las causas del polimorfismo de esta especie. A este respecto, se aporta por primera vez una explicación soportada por numerosas pruebas, a la forma papyracea de la concha descrita por Czihak y Dierl (1961).
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Piacentini, Sophie Valeria. "Tasso di crescita di Pinna nobilis (Mollusca: Bivalvia) in due popolazioni, a Calpe e nell'Isola di Tabarca (Alicante, Mediterraneo Occidentale)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13992/.
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La conoscenza del tasso di crescita di due popolazioni di Pinna nobilis, in due località del Mar Mediterraneo Occidentale, insieme ad una stima d’età, sono un requisito fondamentale per poter comprendere meglio la biologia e l’ecologia di questa specie, al fine di poter istituire specifiche misure di tutela e conservazione. L’obiettivo di questa tesi è quello di utilizzare lo studio della sclerocronologia per comprendere l’origine dei registri interni di crescita e giungere così ad informazioni più accurate sulle modalità di accrescimento. Le valve di individui morti di Pinna nobilis sono state prelevate in due zone della costa Valenciana (Spagna), Calpe e Isola di Tabarca, al fine di valutare la variabilità del processo di crescita. Dalle valve sono state create delle sezioni di 300µm, grazie all’utilizzo di una sega con lama a diamante. Tali sezioni sono state osservate allo stereo-microscopio a luce trasmessa in direzione antero-posteriore. Una stima d’età iniziale è stata effettuata tramite una conta delle lingue di madreperla individuate. Per una stima più precisa è stato analizzato anche lo spessore dello strato di calcite in prossimità dei tre registri interni di crescita più vecchi. Gli individui più longevi appartengono alla popolazione dell’Isola di Tabarca (età max= 25anni), mentre l’età massima raggiunta dagli individui della popolazione di Calpe è 17 anni. Per analizzare l’accrescimento degli individui è stata utilizzata l’equazione di crescita di Von Bertalanffy. Gli individui della popolazione di Calpe hanno un tasso di accrescimento più elevato rispetto a quelli della popolazione di Tabarca, con una lunghezza massima asintotica (Lmax) di 65.2cm per Calpe e 54.9cm per l’Isola di Tabarca. Tali risultati confermano l’esistenza di una forte variabilità di accrescimento fra popolazioni di siti diversi. Le cause son da ricercare nelle caratteristiche dell’area, come il livello trofico, l’esposizione alla forza di onde e correnti o all’impatto antropico.
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Jiménez-Gutiérrez, Santiago V. "Estudio de la ecología de Pinna nobilis (Linnaeus, 1758) en la Comunidad Valenciana y evaluación del evento de mortalidad masiva." Doctoral thesis, Universidad de Alicante, 2020. http://hdl.handle.net/10045/110513.
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La especie endémica Pinna nobilis (Linnaeus, 1758) es el mayor bivalvo del mar Mediterráneo y uno de los mayores del mundo, pudiendo tener un tamaño superior a 1 m de longitud. Las poblaciones de la especie se han visto reducidas durante las últimas décadas por diversas causas de origen antrópico. Actualmente, la situación de la especie es crítica en todo el Mediterráneo, como consecuencia de la mortalidad masiva producida por el protozoo parásito Haplosporidium pinnae. La gravedad es tal, que se considera que la mortalidad es del 100% en las poblaciones afectadas, habiendo sido declarada en España en el año 2019, como especie en peligro de extinción. La presente tesis doctoral tiene como objetivos principales evaluar el estado de las poblaciones de P. nobilis antes y después del evento de mortalidad masiva, así como el estudio de la influencia de las variables ambientales sobre la actividad de las valvas de la especie. El estudio se llevó a cabo en la provincia de Alicante y de manera puntual, en estaciones de muestreo situadas en el resto de la Comunidad Valenciana. Se realizaron censos mediante equipo de buceo autónomo, comprobándose como, antes del evento de mortalidad, iniciado a finales de 2016, la densidad y distribución de tallas dependieron de los factores ambientales de cada localidad. A finales del año 2018 la mortalidad detectada fue del 100 % y se comprobó como la dispersión de los efectos causados por el protozoo se produjo de sur a norte de la Comunidad Valenciana. Para el estudio de la influencia de los factores ambientales en P. nobilis, se diseñó y fabricó un sistema de monitorización específico y se desarrolló un experimento de seguimiento in situ con seis individuos durante dos años. Las nacras estuvieron sincronizadas la mayor parte del tiempo y revelaron dos patrones estacionales de actividad, mostrando especial sensibilidad a las corrientes con dirección bimodal, como las producidas por las olas. Parte del presente trabajo de tesis doctoral se incluye dentro del concepto Ciencia Ciudadana, demostrando como los voluntarios con la formación, medios necesarios y supervisión adecuada, pueden obtener datos científicos de calidad.
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Provenzani, Gwendaline Giusy. "Analisi del tasso di crescita in Pinna nobilis (Molluschia Bivalvia): confronto fra una popolazione profonda e due superficiali del parco Nazionale di Cabrera (Isole Baleari, Spagna)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13993/.
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Il tasso di crescita di tre popolazioni di Pinna nobilis all’interno del Parco Nazionale di Cabrera (Isole Baleari) è stato analizzato per stimare l’età degli individui al fine di una migliore comprensione della biologia e dell’ecologia di questa specie sempre più minacciata. In questa tesi il tasso di crescita di una popolazione profonda, quella delle Baleari (20-30m), è stato confrontato con quello di due popolazioni superficiali: Freus e Gandulf (5-10m). L’obiettivo è valutare l’effetto della profondità e del sito sulle modalità di accrescimento degli individui. Sono state prelevate alcune valve di individui morti di P. nobilis a varie profondità. Lo studio della sclerocronologia ci ha permesso di studiare l’origine dei registri interni di crescita e le modalità di accrescimento. I risultati hanno mostrato una chiara differenziazione della taglia fra le tre popolazioni. Gli individui della popolazione profonda raggiungono dimensioni maggiori elevate e vivono più a lungo. Ma la popolazione di Gandulf ha un tasso di crescita simile a quello della popolazione delle Baleari essendo entrambe caratterizzate da individui di grandi dimensioni (Lmax Baleari= 65,1cm; Lmax Gandulf=62,4cm) e più longevi (età max=27anni). La popolazione di Freus è caratterizzata invece da individui di dimensioni minori e giovani di età (età max=14anni). Anche la velocità di crescita che porta a raggiungere la dimensione asintotica massima risulta simile nella popolazione di Gandulf (K=0,19) e nella popolazione delle Baleari (K=0,14), ed in entrambe è inferiore ai valori rilevati a Freus (K=0,21). Tali risultati evidenziano l’esistenza di una forte variabilità del tasso di accrescimento fra popolazioni collocate sia a profondità che in siti diversi. La differenza riscontrata tra la popolazione di Freus e quella di Gandulf è che la prima si trova in un sito esposto, mentre l’altra è collocata in una cala protetta subendo, quindi, un minor stress idrodinamico.
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Fraissinet, Silvia. "Using sclerochronology to estimate the growth rate in Pinna nobilis: a case study of Les Alfaques Bay population (Ebro Delta, Spain)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14665/.
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Pinna nobilis is the biggest Mediterranean bivalve, endemic and semi-infaunal. Provide hard substrates to colonize, increasing the spatial heterogeneity of the softbottom communities. P. nobilis suffer a drastic decline due to the anthropogenic pressures. It’s included in the Habitats Directive, in the Barcelona Convention, and in the red lists of many Mediterranean countries. Estimates the growth rate allows to understand the population dynamics of species and yield knowledge to improve protection efforts. In this study a new methodology based on sclerochronology was used to estimate the age and the growth rate of a P. nobilis population located in Les Alfaques bay. The shells of 35 specimens were cataloged. A subsample of 20 individuals was selected, and one valve of each specimens was cut into radial sections along PAMS (Posterior Adductor Muscle Scar) to study the inner register. Thus, the positions of PAMS obscured by nacre were identified, and the number of missing records was estimated by the width of the calcitic layer in the anterior part of the shell. The first growth curve for the Les Alfaques bay population was calculated from the length/age data. To simulate the growth rate of this population, the growth model based on the modified Von Bertalanffy equation was used. Shallow water usually hosts small sized populations of P. nobilis, while in deeper waters specimens reaches larger size. In Les Alfaques bay the population is composed by large size individuals though it’s located in shallows waters. This unusual size pattern is probably due to a sand bar that offers protection from hydrodynamic stress, allowing individuals to elongate more. This study contributes to the knowledge on P. nobilis biology and, with the aim to monitor this species, the growth curve could be used as baseline for future studies on habitat characteristics that may affect the population structure and dynamics in Les Alfaques Bay.
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Peyran, Claire. "Etude génétique des populations de grandes nacres, Pinna nobilis, en Occitanie : identification de priorités de conservation dans un contexte de pandémie." Electronic Thesis or Diss., Sorbonne université, 2021. https://theses.hal.science/tel-03728197.
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Les systèmes marins côtiers sont généralement discontinus et constitués d’une mosaïque de paysages sous-marins différents, créant ainsi des distributions parfois très fragmentées chez les espèces qui les colonisent. Les espèces marines côtières sont donc structurées en réseaux de populations connectées entre elles via la dispersion larvaire. Comprendre le fonctionnement et la connectivité entre les populations d’une espèce est indispensable pour adapter les stratégies de conservation. La grande nacre, Pinna nobilis, est une espèce endémique de la mer Méditerranée qui fait aujourd’hui face à une crise majeure qui menace sa survie. Depuis Octobre 2016, des mortalités de masse sont signalées sur ses populations, à travers toutes la mer Méditerranée, causées par un protozoaire parasite, Haplosporidium pinnae. Il s’agit d’un évènement sans précédent, que ce soit par le taux de mortalité (près de 100 %) ou la vitesse de propagation, et qui pourrait conduire à l’extinction de l’espèce. En se focalisant sur le littoral Occitan, cette thèse apporte des connaissances sur la biologie et l’écologie de l’espèce mais aussi sur son fonctionnement et les processus qui permettent le maintien de ses populations afin de proposer des priorités de conservation. Ainsi, nous avons mis en évidence la diversité d’habitats colonisés par l’espèce ainsi que l’importance des lagunes car elles abritent près de 90 % des grandes nacres, sur le littoral Occitan, et semblent servir d’habitat refuge à l’espèce en limitant l’infestation par le parasite. A l’aide de marqueurs microsatellites nouvellement développés, nous avons montré une structure génétique très homogène sur toute la côte, ce qui implique un certain niveau de connectivité et laisse penser qu’une grande partie de la diversité génétique de l’espèce reste préservée dans les lagunes. En se focalisant sur la population de la baie de Peyrefite, dans la Réserve Naturelle Marine de Cerbère-Banyuls, et grâce à une analyse de parenté, nous avons apporté des connaissances sur la dynamique démographique et les processus de repeuplement de l’espèce. L’ensemble de cette thèse permet de définir des recommandations qui seront utiles à la mise en place de mesures de conservation adaptées, indispensables pour la survie de l’espèceIn marine systems, coastal environments are viewed as discontinuous and made up of a mosaic of diversified seascapes, leading to highly fragmented species distributions. Coastal marine species are thus structured in networks of populations that are connected to each other through larval dispersal. Understanding functioning and connectivity patterns between populations of a given species is essential to adapt conservation strategies. The fan mussel, Pinna nobilis, endemic to the Mediterranean Sea, is facing today a major crisis threatening its survival. Starting in October 2016, mass mortalities caused by the protozoan parasite Haplosporidium pinnae have been reported through the entire Mediterranean Sea. This is an unprecedented situation for which neither the mortality rates (around 100%) nor the speed of propagation have ever been recorded for a marine species, and it could lead to the potential extinction of P. nobilis. By focusing on the Occitan coast, this work provides knowledge on the biology and ecology of the species but also on the processes which allow the replenishment of its populations in order to suggest priorities for conservation. We highlighted the wide diversity of habitats colonized by the species and the importance of lagoons as they shelter 90 % of fan mussels recorded on the Occitan coast, and seem to provide natural refuge as only the lagoon populations remain unaffected by H. pinnae. Using newly developed microsatellite markers, we highlighted a very homogeneous genetic structure over the entire coast, which implies some connectivity and suggests that most of the genetic diversity of the species remains preserved in the lagoons. By focusing on the population of Peyrefite Bay, in the Marine Protected Area of Cerbère-Banyuls, through parentage analysis, we provided knowledge on the demographic dynamics and the repopulation processes of the species. Based on the present work, we defined recommendations that will help to design adapted conservation measures that will be essential for the survival of the species
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Freitas, Pedro Seabra. "Environmental and biological controls of Mg/Ca, Sr/Ca and Mn/Ca ratios in the shells of the bivalves Pinna nobilis, Mytilus edulis and Pecten maximus : implications for palaeo-environmental reconstructions." Thesis, Bangor University, 2007. https://research.bangor.ac.uk/portal/en/theses/environmental-and-biological-controls-of-mgca-srca-and-mnca-ratios-in-the-shells-of-the-bivalves-pinna-nobilis-mytilus-edulis-and-pecten-maximus--implications-for-palaeoenvironmental-reconstructions(7ee552e9-da04-48b3-9cda-8df55183e068).html.
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Calcium carbonate skeletons produced by organisms such as foraminifera, ostracodes, corals and molluscs have the potential to contain within their isotope and elemental composition signatures (i. e. proxies) that reflect the environment in which the organisms calcified. Bivalves offer the potential for high resolution reconstructions over a wide geographical range and in the fossil record since the Early Ordovician. However, when compared to other biogenic carbonate archives there have been relatively fewer studies that have investigated bivalve mollusc shell geochemistry, especially robust validation studies of likely geochemical proxies. This study contributes to the evaluation and validation of geochemical proxies in bivalves. More specifically, the aim was to investigate and validate the relationships between the elemental composition (Mg/Ca, Sr/Ca and Mn/Ca) of bivalve shell calcite and its primary environmental controlling factors, i. e. seawater temperature, dissolved and particulate Mn concentrations. In addition, the role of secondary control factors (i. e. "vital" effects and small-scale element heterogeneity), as a source of non-environmental variability in bivalve geochemical proxies was also investigated. Studies on the temperature dependence of Mg/Ca ratios in bivalve calcite shells have produced contradictory results. In the bivalve species studied, Pinna nobilis (Chapter 2), Mytilus edulis (Chapter 4) and Pecten maximus (Chapters 3 and 4), the temperature dependence of shell calcite Mg/Ca ratios was found to be generally weak. The occurrence of a large variability in Mg/Ca ratios at the species, inter- and intra- individual shell levels, as well as through ontogeny, together with a weak temperature control, clearly suggests a strong physiological control of calcite Mg/Ca ratios during shell biomineralization. Bivalve calcite Mg/Ca ratios do not yet appear to be a reliable and precise temperature proxy, at least in the species studied. In the three bivalve species studied, Pinna nobilis (Chapter 2), Mytilus edulis (Chapter 5) and Pecten maximus (Chapters 3 and 5), shell Sr/Ca ratios were found to be influenced by more than a single physiological control (shell growth rate, metabolic activity and even shell Mg content), which may differ from one species to another, but also vary temporally in a single species. Shell growth rate, assumed to indicate a precipitation rate control, was significantly correlated to shell Sr/Ca ratios in field- and laboratory-grown P. maximus and M. edulis. The positive relationship observed between absolute respiration rate and Sr/Ca ratios in M. edulis, grown both in laboratory and field culturing experiments, provides the first direct evidence of an influence from metabolic activity on bivalve calcite Sr/Ca ratios. The seasonal variation of Mn/Ca ratios in the shell calcite of field grown Pecten maximus specimens followed a similar intra-annual variation to dissolved Mn concentrations described previously (Chapter 5). In Mytilus edulis, shell Mn/Ca ratios were found not to be influenced by either dissolved or particulate Mn2+ concentrations (Chapter 6). Shell Mn/Ca ratios and shell growth rates showed a remarkably similar seasonal variation. However, such similarity is not indicative of a precipitation rate control since precipitation rate and Mn partition coefficient in synthetic inorganic calcite are inversely related. The influence of shell growth rate on shell Mn/Ca ratios must reflect a physiological control most likely acting at the transport of Mn into the extra-pallial fluid. Significant small-scale heterogeneity in Mg/Ca, Sr/Ca and Mn/Ca ratios in the shells of Pecten maximus and Mytilus edulis deposited at a constant temperature was observed (Chapter 7). In particular, elaborate shell features and disturbance growth marks, were associated with significant variations of the elemental content of the shell calcite and may represent an important interference in the use of geochemical proxies in bivalve shell calcite. Importantly, shell Mg/Ca ratios in the inner regions of P. maximus shells promise the potential to become a valid palaeotemperature proxy. In both bivalve species studied, elemental/Ca ratios vary significantly in shell deposited from the same extra-pallial fuild and thus strongly suggests that element incorporation in to the shell carbonate at the crystalsolution interface is a key control step in determining the element composition of shell calcite. Most of the results in this study contribute to the growing evidence that bivalve calcite element composition is controlled by physiological factors that underlie a tight control of element incorporation during shell biomineralization. Unless the secondary controls (i. e. metabolic and/or kinetic factors) on element incorporation, in particular their influence on the small-scale heterogeneity of shell elemental composition, can be understood in more detail, and subsequently compensated for, the use of the geochemical proxies Mg/Ca, Sr/Ca and Mn/Ca ratios in bivalves for reliable and accurate reconstructions of past or present environmental conditions remains unlikely, at least in the species studied to date.
Book chapters on the topic "Pinna nobilis"
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Trigos, S., N. Vicente, J. R. García-March, J. Torres, and J. Tena. "Embryological Development of Pinna nobilis in Controlled Conditions." In Marine Productivity: Perturbations and Resilience of Socio-ecosystems, 369–71. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13878-7_42.
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Marin, Frédéric, Prabakaran Narayanappa, and Sébastien Motreuil. "Acidic Shell Proteins of the Mediterranean Fan Mussel Pinna nobilis." In Molecular Biomineralization, 353–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21230-7_13.
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Martinović, Rajko, Slavica Petović, Danijela Joksimović, Robert Bunet, Sylvain Couvray, Damien Kirchhofer, Rémy Simide, et al. "Recruitment and Growth of the Fan Mussel Pinna nobilis in the Montenegrin Adriatic Coast and Comparison with the Western Mediterranean." In The Handbook of Environmental Chemistry, 193–213. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/698_2021_749.
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Basso, Lorena, Maite Vázquez-Luis, José R. García-March, Salud Deudero, Elvira Alvarez, Nardo Vicente, Carlos M. Duarte, and Iris E. Hendriks. "The Pen Shell, Pinna nobilis." In Advances in Marine Biology, 109–60. Elsevier, 2015. http://dx.doi.org/10.1016/bs.amb.2015.06.002.
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Katsanevakis, Stelios, Francesca Carella, Melih Ertan Çinar, Hrvoje Čižmek, Carlos Jimenez, Diego K. Kersting, Diego Moreno, Lotfi Rabaoui, and Nardo Vicente. "The Fan Mussel Pinna nobilis on the Brink of Extinction in the Mediterranean." In Reference Module in Earth Systems and Environmental Sciences. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-821139-7.00070-2.
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Morosini, Stefano, and Stefano Twardzik. "Nuovi documenti per lo studio della spedizione Nobile al Polo nord." In Dall’Artico a Milano Il restauro della Tenda rossa al Museo Nazionale Scienza e Tecnologia Leonardo da Vinci. Venice: Fondazione Università Ca’ Foscari, 2023. http://dx.doi.org/10.30687/978-88-6969-750-0/002.
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Nell’Archivio generale del Comune di Milano, oggi custodito presso la Cittadella degli Archivi al quartiere Niguarda, la sequenza piana e lineare dei fascicoli disposti in serie annuali a partire dagli ultimi anni Venti del secolo scorso, viene talvolta alterata da ‘affari’ di particolare mole e rilevanza. Uno di questi affari è rappresentato dalle voluminose cartelle che raccolgono i docu- menti attinenti alla preparazione e soprattutto alla gestione amministrativa e finanziaria della spedizione al Polo nord del 1928 guidata da Umberto Nobile.
Conference papers on the topic "Pinna nobilis"
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Khurshid, Benazir, Jonathan Perrin, Frédéric Marin, Mathieu Thoury, Cedric Broussard, and Daniel Jackson. "ORGANIC/INORGANIC INTERFACES IN CALCIUM CARBONATE BIOMINERALS: THE CASE OF PINNA NOBILIS SHELL (BIVALVIA, PTERIOMORPHIA)." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6851.
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