57 research outputs found
Struttura genetica in popolazioni naturali ed allevate di vongole (Tapes decussatus) in relazione a programmi per la tutela, il ripopolamento, la gestione e la produzione.
No full textGenetic characterization of MHC class II exon2 in Bombina pachypus populations across the entire range: preliminary results”
No full textORIENTATION BEHAVIOR AND HETEROZYGOSITY OF SANDHOPPER POPULATIONS IN RELATION TO STABILITY OF BEACH ENVIRONMENTS
No full textMitochondrial DNA sequence analysis of the spectacled salamander, Salamandrina terdigitata (Urodela: Salamandridae), supports the existence of two distinct species
No full textSalamandrina is a monotypic genus of the family Salamandridae endemic to Italy. Forty five individuals of the spectacled salamander, Salamandrina terdigitata, representing 11 populations throughout the whole distribution range were examined for sequence variation of three mitochondrial DNA genes encoding the 12S and 16S ribosomal RNA's and cytochrome b 1324 bp). The results indicate the existence of two genetically distinct and geographically non- overlapping mtDNA lineages. The first lineage includes the southern populations and the second one comprises the central- northern populations. The degree of genetic divergence between the two groups is high and comparable to distances calculated from homologous sequences available in GenBank between other Salamandrid species. As a result, the genus Salamandrina probably requires splitting into two species. We also compare substitution rates associated with the mitochondrial genes employed across all Salamandrids studied so far, and discuss two possible palaeogeographic scenarios which could have shaped the splitting of the two Salamandrina lineages. These findings have also important implications for management and conservations of the spectacled salamander, which is protected under several international and regional conventions and directives
Modelling landscape dynamics in a glacial refugium - or the spatial and temporal fluctuations of tree line altitudes
No full textTo produce a dynamic model of tree line position and habitat suitability for temperate and warm temperate forests, with high spatial and temporal resolution from the Last Glacial Maximum to the present, using an approach based on the quasi-constant altitudinal difference between the tree line altitude (TLA) and the equilibrium line altitude (ELA) of glacier
Introgressive hybridization between the endangered native Bombina pachypus and the introduced B. variegata in a protected area in central Italy
No full textStruttura genetica in popolazioni allevate e naturali del gambero Penaeus japonicus in relazione a programmi per la gestione e la produzione.
No full textDistribuzione geografica delle due specie di Salamandrina in Italia (S. perspicillata e S. terdigitata)
No full textDivergenza genetica tra popolazioni sudeuropee di Mylabris flexuosa Olivier (Coleoptera, Meloidae).
No full textOsservazioni sull’ecologia di alcune popolazioni di Bombina pachypus (Amphibia: Bombinatoridae) nei Monti Lepini (Lazio)
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