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• W2262014787 abstract "The present study carried out a detailed assessment of the metazoan parasite fauna in Boops boops (Sparidae) along the Spanish coasts off the Western Mediterranean and North-East Atlantic, which provided taxonomically consistent dataset comprising three levels of parasite community organisation that allowed questions regarding the structure of parasite communities to be addressed.The diversity of the parasite fauna of B. boops appeared to be higher than previously thought, as evidenced by the description of one new species, Wardula bartolii Perez-del-Olmo et al., 2006 and the recovery of 53 parasite species (25 new host records). The complete checklist of parasites of this host throughout its distributional range comprises 78 species and 365 host-parasite-area records. A group of nine species with a wide geographical distribution was identified as the core of the parasite fauna of B. boops.The regional parasite fauna of B. boops was richest in the North-East Atlantic. There was a clear separation of the North-East Atlantic and Mediterranean local faunas, with a transition location occupying an intermediate position. Local parasite faunas were generally diverse. There was a high representation of parasites with complex life-cycles, transmitted via food ingestion, mostly trematodes. The phylogenetic influence on the parasite communities in B. boops is rather weak, since generalist parasites comprised a considerable part of communities.The species of the core parasite fauna of B. boops were already present in juvenile fish, whereas all species added to communities in larger fish were rare/accidental. The observed sequence of species appearance and persistence supported the hypothesis that species with wide geographical distributions appear in the fish population earlier than rare/stochastic species. Parasite communities were rich and abundant from an early age. Six species of the core parasite fauna of B. boops were identified as key parasites in developing communities since they persisted as common in all size cohorts and represented the majority of the individuals. A nested subset pattern was found which could not be completely attributed to either accumulation over time or segregation of the parasite species among different host cohorts. Nestedness was strongly related to the differential species abundance, suggesting that passive sampling could be the mechanism leading to this non-random structure.The data revealed that the geographical distance and the region affect the species composition and structure of parasite faunas and component communities in B. boops. The distance between localities/regions contributed significantly to the decay of the similarity estimated from parasite abundance at the infracommunity level. The structured spatial patterns were consistent in time but not across seasons. The spatial synchrony observed was solely due to the assemblage of the core species, supporting the hypothesis that widespread species would be strongly associated with patterns of variation in environmental conditions. The interspecific abundance-distribution patterns were recognized as the most important for the distance-decay relationship of similarity in this system due to the strong correlations observed at all scales of analysis.The comparative analyses revealed a notable alteration of parasite abundance patterns and dramatic changes in community richness, abundance and structure of parasite communities in B. boops studied after the Prestige oil-spill. A directional trend in parasite community succession was detected. However, the differences were still large indicating that shifting pollution baselines probably affect community recovery.The elevated levels of monoxenous infections could indicate that changes in immune parameters of fish. The increase of heteroxenous may have reflected an enhancement of the populations of the mollusc and copepod hosts due to organic enrichment following the oil-spill. Focusing on higher taxonomic/functional levels and the use of multivariate statistical approach have proved to be very useful in studying the response of parasite communities to pollution.__________________________________________________________________________________________________RESUMENEn la presente tesis doctoral se realizo un estudio exhaustivo de los metazoos parasitos de la boga, Boops boops (Sparidae) en la costa Mediterranea y Atlantica espanola.La diversidad parasita fue mucho mayor de lo que previamente se pensaba, como se evidencio en la descripcion de una nueva especie y la presencia de 53 especies (incluyendo 25 nuevos registros). Se encontro regularmente un grupo de nueve especies de amplia distribucion, que fueron considerados el nucleo de la parasitofauna de B. boops. Las faunas parasitas locales resultaron ser diversas y caracterizadas por una gran representacion de parasitos generalistas y con ciclos vitales complejos.La secuencia de aparicion y persistencia observada en el desarrollo de las comunidades parasitas apoyo la hipotesis de que las especies con distribucion geografica amplia aparecen en las poblaciones de peces antes que las raras y estocasticas. Las comunidades parasitas de B. boops fueron ricas y abundantes desde una edad temprana. Se detecto una estructura anidada fuertemente relacionada con una abundancia diferencial de las especies, sugiriendo que el muestreo pasivo de parasitos del hospedador podria ser el mecanismo responsable de esta estructura no-aleatoria.Tanto la distancia geografica como la region de origen afectaron la composicion de especies y la estructura de las faunas parasitas y comunidades componentes. El patron de estructura espacial fue consistente en el tiempo pero no entre estaciones. La relacion abundancia-distribucion interespecifica fue el aspecto mas importante en el declive de la similitud con la distancia.El analisis comparativo de las muestras de localidades afectadas por el vertido del petrolero Prestige revelo un cambio drastico en la riqueza, abundancia y estructura de las comunidades parasitas, asi como una notable alteracion de los patrones de abundancia. Se detecto una tendencia direccional en la sucesion de las comunidades parasitas tras el vertido. Sin embargo, las diferencias siguen siendo acusadas, lo que podria indicar un desplazamiento de los niveles base que estaria afectando la recuperacion de las comunidades bentonicas y parasitas tras el vertido. Tanto el enfoque basado en niveles taxonomicos y funcionales superiores como la aproximacion mediante analisis estadisticos multivariantes, resultaron ser muy efectivos para este tipo de estudios." @default.
• W2262014787 created "2016-06-24" @default.
• W2262014787 creator A5056993644 @default.
• W2262014787 date "2008-04-25" @default.
• W2262014787 modified "2023-09-24" @default.
• W2262014787 title "Biodiversity and structure of parasite communities in Boops boops (Teleostei: Sparidae) from the Western Mediterranean and off the North East Atlantic coasts of Spain." @default.
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