Papers by Giorgio Bardelli
Hystrix the Italian Journal of Mammalogy, Jan 31, 2014
Natural History Sciences, 2014
To embody one of Luigi recurring recommendations, that is to pursue a friutful collaboration amon... more To embody one of Luigi recurring recommendations, that is to pursue a friutful collaboration among scientific Associations to create productive synergies and sharing of objectives, we publish the biography of Luigi Cagnolaro as edited by our colleagues Giorgio Bardelli, Giorgio Chiozzi, Bruno Cozzi, Michela Podestà and Stefano Scali, of Milan Museum of Natural History and the Italian Society of Natural Sciences, two institutions that, with ATIt and ANMS Luigi actively fostered, sharing aims, purposes and approaches, and with whom a yearly event will be organised, to adequately celebrate Luigi's memory. Con il fine di dare concretezza ad una delle indicazioni ricorrenti di Luigi, ossia nel perseguimento di una proficua collaborazione tra le Associazioni scientifiche, nella volontà di creare feconde sinergie e perseguire condivisioni di intenti, pubblichiamo di seguito la biografia di Luigi Cagnolaro redatta dai colleghi
The present mineralogical study concerns the finding of offretite nearby Lake of Arno, Saviore Va... more The present mineralogical study concerns the finding of offretite nearby Lake of Arno, Saviore Valley, not far from the Forcel Rosso Pass, locality where for the first time in Italy offretite has been described. This mineral shows millimetric crystals with "barrel" habit and hexagonal outline, and forms aggregates of vitreous and plate crystals epitaxial with chabasite. Offretite has been found in cavities of an arenaceous metasiltite belonging to Servino Formation, metamorphosed and metasomatised by the Adamello intrusion. Quantitative electron microprobe analysis perfectly agrees with the formula of offretite and the specimens analyzed seem to exclude the presence of erionite. X ray powder diffraction and the structural refinement of the cell parameters with the Rietveld method confirm on that the mineral phase is offretite.
The gazelles of Dahlak Kebir are the only population of Nanger soemmerringii Cretzschmar, 1828 li... more The gazelles of Dahlak Kebir are the only population of Nanger soemmerringii Cretzschmar, 1828 living on an island. Little is known on the biology of these animals, except that they are evidently smaller than their conspecifics living on the continent. We took advantage of a recently acquired collection of crania, probably the largest available study sample of the Dahlak Kebir population worldwide, to explore the phenotypic variation of this island endemism. To this aim, we employed state of the art geometric morphometrics techniques and multivariate statistics to compare the insular population with samples of two out of three subspecies of N. soemmerringii from continental Africa. We found that not only is the size of the animal remarkably smaller in Dahlak Kebir gazelles, but their cranial shape is also highly distinctive, and this might be only partly explained by allometry. We also showed that phenotypic variance might have been reduced in the island population, likely as a consequence of genetic bottlenecks. This unique population is part of a species vulnerable to extinction. Our results suggest that the Dahlak Kebir Island gazelles might represent a significant component of its variation and potential for adaptive change and evolution. More information, including molecular data, and an accurate assessment of its taxonomic relevance and conservation status, is urgently needed.
The gazelles of Dahlak Kebir are the only population of Nanger soemmerringii Cretzschmar, 1828 li... more The gazelles of Dahlak Kebir are the only population of Nanger soemmerringii Cretzschmar, 1828 living on an island. Little is known on the biology of these animals, except that they are evidently smaller than their conspecifics living on the continent. We took advantage of a recently acquired collection of crania, probably the largest available study sample of the Dahlak Kebir population worldwide, to explore the phenotypic variation of this island endemism. To this aim, we employed state of the art geometric morphometrics techniques and multivariate statistics to compare the insular population with samples of two out of three subspecies of N. soemmerringii from continental Africa. We found that not only is the size of the animal remarkably smaller in Dahlak Kebir gazelles, but their cranial shape is also highly distinctive, and this might be only partly explained by allometry. We also showed that phenotypic variance might have been reduced in the island population, likely as a consequence of genetic bottlenecks. This unique population is part of a species vulnerable to extinction. Our results suggest that the Dahlak Kebir Island gazelles might represent a significant component of its variation and potential for adaptive change and evolution. More information, including molecular data, and an accurate assessment of its taxonomic relevance and conservation status, is urgently needed.
Biological Journal of the Linnean Society, 2014
a cura di Stefano Mazzotti e Giancarla Malerba MUSEOLOGIA SCIENTIFICA MEMORIE • N. 9/2013 • 69-74
Museologia scientifica
Vengono descritti i principali problemi tecnici rilevati in merito alla conservazione della colle... more Vengono descritti i principali problemi tecnici rilevati in merito alla conservazione della collezione in liquido della Sezione di Zoologia dei Vertebrati del Museo Civico di Storia Naturale di Milano. Si riferisce inoltre dell'utilizzo di una miscela di alcoli come liquido di dimora, in sostituzione dell'alcool etilico.
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Papers by Giorgio Bardelli