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41.
New insights into the taxonomy and phylogeny of social voles inferred from mitochondrial cytochrome b sequences
Boris Kryštufek, Tanya Zorenko, Elena Bužan, 2012, izvirni znanstveni članek

Opis: We sequenced the entire cytochrome b gene in Microtus paradoxus from Turkmenistan and Microtus socialis from Crimea and Kalmykia. Phylogenetic relationships among social voles were reconstructed by the inclusion into analyses of a further 23 published haplotypes belonging to six species. The two probabilistic methods which were used in phylogenetic analyses, the Bayesian inference and Maximum Likelihood, yielded very similar results. Both trees showed two highly divergent lineages which were further subdivided into seven species. The socialis lineage encompassed four species (M. socialis, M. irani, M. anatolicus, and M. paradoxus), and the remaining three species clustered into the guentheri lineage (M. guentheri, M. hartingi, M. dogramacii). The ranges for nucleotide divergences between seven species of social voles (4.95-9.28% and 4.18-8.81% for mean and net divergences, respectively) mainly exceeded 4.3%, which is frequently regarded as the conservative cut-off between sibling species in the specious genus Microtus
Najdeno v: osebi
Ključne besede: Microtus socialis, Microtus paradoxus, Arvicolinae, Cryptic species, Species delimitation, Molecular systematics
Objavljeno: 15.10.2013; Ogledov: 1620; Prenosov: 70
URL Polno besedilo (0,00 KB)

42.
Geografski vidik dinarsko-alpskega ekološkega koridorja
Matevž Premelč, 2012, diplomsko delo

Najdeno v: osebi
Ključne besede: ekološko omrežje, ekološki koridor, rjavi medved, Dinaridi, Alpe, geografija, diplomska dela
Objavljeno: 15.10.2013; Ogledov: 1514; Prenosov: 42
URL Polno besedilo (0,00 KB)
Gradivo ima več datotek! Več...

43.
Phylogenetic position of the Ohiya rat (Srilankamys ohiensis) based on mitochondrial and nuclear gene sequence analysis
Elena Bužan, Marie Pagès, Johan Michaux, Boris Kryštufek, 2011, izvirni znanstveni članek

Opis: We investigated the phylogenetic position the Ohiya rat, endemic to Sri Lanka, Srilankamys (Rodentia, Murinae), within the tribe Rattini based on the combined analysis of three independent genes (a mitochondrial one and two nuclear exons). Three major lineages (the Maxomys, the Dacnomys and the Rattus divisions) were retrieved as monophyletic groups within the tribe Rattini. Srilankamys was not affiliated to any of the representatives of the Dacnomys division as it was supposed based on morphological characters, but clearly appeared as the first genus to diverge among the Rattus division. The Mindanao Shrew Mouse, Crunomys melanius, emerged as a part of the Maxomys division raising questions about the validity of the Crunomys and the Maxomys divisions as currently defined. Molecular date of divergence between Srilankamys and the other representatives of the Rattus division falls within the interval 6.7 +- 0.74 Mya, coinciding with the time of the isolation of Sri Lanka from the Deccan peninsula and the aridification period owing to the climate change at the end of the Miocene epoch. We suggest that the isolation of Sri Lanka from the continent, reinforced by the action of a seasonal monsoon-dominated climate, would have led to the isolation of some ancestral rodents of the Rattus division, which would have differentiated later into the Ohiya rat by a vicariant process. In a more general point of view, our study supports the previous results obtained on other organisms and evidence that Sri Lanka appears to be characterized by a particular fauna as compared to the Indian mainland. This island would therefore be considered as a specific distinct hotspot of biodiversity
Najdeno v: osebi
Ključne besede: Ohiya rat, Srilankamys ohiensis, rodents, Phylogenetic analyses
Objavljeno: 15.10.2013; Ogledov: 1727; Prenosov: 72
URL Polno besedilo (0,00 KB)

44.
45.
Microsatellite markers confirm extensive population fragmentation of the endangered Balkan palaeoendemic Martino's vole (Dinaromys bogdanovi)
Elena Bužan, Boris Kryštufek, Josef Bryja, 2010, izvirni znanstveni članek

Opis: The Martino's vole is an endangered rodent endemic to the western Balkan Peninsula. Its range is fragmented, and populations are small due to high habitat specificity. The level of genetic variation within such populations is often low, and genetic differentiation between patchily dispersed populations is high. By scoring eight microsatellite loci in 110 individual Martino's voles originating from 27 locations throughout the species range, we analysed genetic variation at both the intra- and interpopulation level. Factorial correspondence analysis, Bayesian analyses, and allele sharing distances divided individuals into three phylogroups (Northwestern, Central, and Southeastern), thus providing independent support for phylogeographic structuring, a pattern that has been described in previous studies based on mitochondrial DNA. Spatial genetic analyses showed that populations are highly fragmented, even in those areas with the highest population densities. The highest intrapopulation genetic variability and stable effective population sizes were found in Mount Zelengora (Bosnia and Herzegovina), which harbours a relatively large population of Martino's voles. Populations in the Central and Southeastern lineages exhibited a significant isolation-by-distance pattern, indicating limited gene flow between them. Contrary to previous opinion, low effective population size and very limited gene flow between remaining populations suggest that the long-term existence of the Martino's vole might not be secure, even in populations that live in optimal habitats. The only threat to the Martino's vole identified thus far is competitive exclusion by the European snow vole. However, our results suggest that conservation problems associated with this paleoendemic rodent are more complex
Najdeno v: osebi
Ključne besede: Dinaromys bogdanovi, Martino's vole, population structure, conservation management, spatial genetics, metapopulation
Objavljeno: 15.10.2013; Ogledov: 1724; Prenosov: 48
URL Polno besedilo (0,00 KB)

46.
Hibernacija ali zimsko spanje
2011, radijski ali tv dogodek

Najdeno v: osebi
Ključne besede: zoologija, hibernacija, zimsko spanje
Objavljeno: 15.10.2013; Ogledov: 1832; Prenosov: 25
URL Polno besedilo (0,00 KB)

47.
Mobilnost pedagoških delavcev
2011, radijski ali tv dogodek

Najdeno v: osebi
Ključne besede: visoko šolstvo, mednarodne izmenjave, znanstveno sodelovanje, Univerza na Primorskem, Znanstveno-raziskovalno središče, Inštitut za biodiverzitetne študije
Objavljeno: 15.10.2013; Ogledov: 1486; Prenosov: 10
URL Polno besedilo (0,00 KB)

48.
Chromosomal variation in social voles
Jan Zima, Atilla Arslan, Petr Benda, Miloš Macholán, Boris Kryštufek, 2013, izvirni znanstveni članek

Najdeno v: osebi
Ključne besede: karyotypes, Microtus guentheri, Microtus hartingi, Microtus socialis, Voles, C-banding, NOR distribution
Objavljeno: 15.10.2013; Ogledov: 1493; Prenosov: 11
URL Polno besedilo (0,00 KB)

49.
Leto biotske raznovrstnosti
Martina Kačičnik Jančar, Mateja Kocjan, Boris Kryštufek, Tomaž Mihelič, Darij Krajčič, Peter Skoberne, 2010, radijski ali tv dogodek

Najdeno v: osebi
Ključne besede: biološka raznovrstnost, biodiverziteta, varstvo narave, ekologija
Objavljeno: 15.10.2013; Ogledov: 1885; Prenosov: 16
URL Polno besedilo (0,00 KB)

50.
Mitochondrial sequences point on a cryptic species in five-toed jerboas, subgenus Paralactaga
Boris Kryštufek, Atilla Arslan, Adwan Shehab, Mounir Abi Said, Sara Zupan, Martina Lužnik, 2013, izvirni znanstveni članek

Opis: We addressed the species taxonomy of five-toed jerboas ( Allactaga , subgenus Paralactaga ) in the Middle East by applying molecular markers (cytochrome b and a partial 16S rRNA). The study consisted of 17 specimens from eight localities in the Middle East, representing both species: Allactaga euphratica and Allactaga williamsi . The phylogenetic reconstructions yielded three highly divergent lineages, which failed to conform to the recent taxonomy of Paralactaga . The first lineage ( williamsi lineage) encompassed all the samples of A. williamsi from Turkey and Iran and also the specimens of A. euphratica from Lebanon. The haplotypes of A. euphratica were arranged into two lineages, which showed strong geographic associations. One lineage contained samples from Harran in Turkey and from Iran, while all the samples from Syria clustered in another lineage. The pairwise Kimura twoparameter values suggested similar divergences between the three lineages and were within the range reported for a sister species of rodents. Our results point to a cryptic species in A. euphratica and also provide evidence of the expanded range of A. williamsi further south of Lebanon
Najdeno v: osebi
Ključne besede: Allactaga euphratica, Allactaga williamsi, five-toed jerboas, molecular phylogeny, species delimitation, aridland biodiversity
Objavljeno: 15.10.2013; Ogledov: 2726; Prenosov: 80
URL Polno besedilo (0,00 KB)

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