1,720,986 research outputs found
Utilizzazione di esche e trappole per il pelo per l'individuazione della lince (Lynx lynx, Linnaeus, 1758) nelle Alpi nord orientali
No full textLiver and limb lipid content and composition in roe deer males during the pre and post rutting seasons.
No full textRelazione tra indici riproduttivi del fagiano di monte, parassiti e caratteristiche ambientali
No full textComportamento di marcatura in cattività della lince eurasiatica (Lynx lynx) dopo stimolazione ed implicazioni sul monitoraggio in natura.
No full textHAS THE RECOLONIZATION OF THE PO PLAIN BEGUN? UPDATES REGARDING THE PRESENCE OF THE EURASIAN OTTER (Lutra lutra) IN NORTH-EASTERN ITALY
Full text linkWidespread in Italy in the early 1900s, the Eurasian otter subsequently underwent
a dramatic decline that led to its local extinction in many administrative regions, with the exception of a small residual nucleus in southern Italy. For a few years now, the Austrian and Slovenian populations adjacent to north-eastern Italy have been increasing sharply, leading to a recolonization of the area by the species. During 2020, in Friuli Venezia Giulia, surveys of signs of presence were carried out in 48 grid cells (10 x 10 km) to update information on the species’ local distribution. The following monitoring methods were used: monitoring beneath bridges combined with transects along water courses. 17 grid cells tested positive for the presence of the species, and currently, the otter appears widely distributed in Friuli Venezia Giulia along the main waterways of the Eastern Alps and Prealps, and in some areas overlooking the plain of the Tagliamento and the transborder Isonzo-Soča basin, both included in the Po plain. These constitute the first observations of the species for more than 50 years. Compared to previous studies, 13 new grid cells involving the presence of otters were identified, including in lowland areas, suggesting a progressive expansion from the mountain ranges towards the Po-Venetian Plain. This represents, a spur to expand research
and implement new studies to improve levels of knowledge about and the consequent protection of the species. Finally, the integration of transects along riverbanks to monitoring beneath bridges, allowed us both to collect numerous observation and to compare our results with previous studies
Genetic and morphometric comparison betweenSorex arunchi Lapini and Testone, 1998, and other shrews from Italy
No full textThe results of allozymic, morphologic and morphometric studies performed on three parapatric shrews of the genus Sorex from northern Italy are presented. These data clearly indicate: (1) Sorex samniticus is genetically well differentiated from S. araneus and S, arunchi, displaying a high mean value of genetic distance in comparison with the other two species (D = 0.463). (2) S, araneus and S. arunchi display low values of genetic distance (D = 0.007) and the latter shows lower levels of genetic variability. Altough no fixed allele difference was observed, an exclusive allele (Lap-2(96)) is present in S. arunchi at low frequence, another one (Pgm-1(96)) is rare in S. araneus and quite frequent in S. arunchi, and several alleles (12) of S. araneus are missing in S. arunchi. In S. araneus some of these alleles are quite frequent. (3) Strong morphometric differences between S. araneus and S. arunchi permit to distinguish these parapatric shrews with great accuracy, also in some cases of marginal sympatry. These evidences support the hypothesis that S, arunchi might be a recent (end of Pleistocene-lower Holocene) relict of the subgenus Sorex s. s
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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