14,859 research outputs found

    Mitochondrial DNA reveals genetic structuring of <i>Pinna nobilis</i> across the Mediterranean Sea

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    Pinna nobilis is the largest endemic Mediterranean marine bivalve. During past centuries, various human activities have promoted the regression of its populations. As a consequence of stringent standards of protection, demographic expansions are currently reported in many sites. The aim of this study was to provide the first large broad-scale insight into the genetic variability of P. nobilis in the area that encompasses the western Mediterranean, Ionian Sea, and Adriatic Sea marine ecoregions. To accomplish this objective twenty-five populations from this area were surveyed using two mitochondrial DNA markers (COI and 16S). Our dataset was then merged with those obtained in other studies for the Aegean and Tunisian populations (eastern Mediterranean), and statistical analyses (Bayesian model-based clustering, median-joining network, AMOVA, mismatch distribution, Tajima’s and Fu’s neutrality tests and Bayesian skyline plots) were performed. The results revealed genetic divergence among three distinguishable areas: (1) western Mediterranean and Ionian Sea; (2) Adriatic Sea; and (3) Aegean Sea and Tunisian coastal areas. From a conservational point of view, populations from the three genetically divergent groups found may be considered as different management units

    Simposio: Bourdieu in Italia 20 anni dopo: la definitiva legittimazione?

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    il simposio fa un bilancio, a 20 anni dalla scomparsa, della diffusione e utilizzo di Bourdieu in Italia

    Introduzione. Per un approccio generativo alla sociologia di Pierre Bourdieu

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    L'introduzione presenta il significato e i contenuti del volume

    Azioni urbanistiche pisane per il controllo del litorale maremmano e dello spazio tirrenico (1290-1313)

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    Al momento della discesa in Italia dell’imperatore Enrico VII (1310-1313) il Tirreno è uno spazio marittimo delimitato da due rive, continentale ed insulare, tra loro inscindibili, sul quale Pisa esercita ancora un determinante controllo. A sostegno di questo assunto il presente contributo si focalizza sulle fondazioni urbanistiche progettate e realizzate dal Comune di Pisa in Maremma e nella dirimpettaia Gallura all’inizio del Trecento, in particolare Terranova San Vincenzo (1304) e Terranova di Gallura (1298-1305). In questa fase anche i Comuni di Siena e Orvieto intervengono nello stesso contesto tirrenico con iniziative analoghe. Il presidio pisano, sostenuto da notevoli investimenti urbanistici e opere di architettura militare, risulta essere il più efficace. Il contesto storico e alcuni aspetti progettuali introducono ad una più aperta lettura delle azioni in atto tra Sardegna e Toscana nel primo Trecento. Upon arrival in Italy of Emperor Henry VII (1310-1313) the Tirreno is a maritime space surrounded by two banks, continental and insular. They are inseparable and still controlled by Pisa. In support of this assumption, the present paper focuses on the urban foundations designed and built by the city of Pisa in Maremma and the neighbor across Gallura in the beginning of the fourteenth century, especially Terranova San Vincenzo (1304) e Terranova di Gallura (1298-1305). In this phase also the towns of Siena and Orvieto are involved in the same context Tyrrhenian with similar initiatives. Pisa’s presidium, supported by considerable investments in urban and works of military architecture, is the most effective. The historical context and some design aspects, lead to a more open reading of the actions taking place between Sardinia and Tuscany in the early Fourteenth century

    Marco Dasso. Architetture e progetti nel secondo Novecento

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    Monografia dell'opera di Marco Dasso, architetto ligur
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