[Show abstract][Hide abstract] ABSTRACT: We analysed the trophic spectrum of six Bombina hybrid populations from Livada Forest. The most frequently consumed preys are dependent of the habitat, the omnipresent ones were Coleopterans, Dipterans andArachnids. The Collembolans accidentally register a high abundance. The shed skin consumption is indirectly connected with the feeding intensity, suggesting the fact that it can be an additional food aspect, being rich in protein. Regarding the differences between the sexes, the large-sized preys present a majority in the case of thefemales and juveniles, respectively those rich in lipids (Lepidoptera larvae). Thus, their capture requires a lower amount of energy, which is needed in the growth and reproduction process. Most of the preys have a terrestrial origin.
[Show abstract][Hide abstract] ABSTRACT: In the forest from Livada there is a mosaic hybrid zone found at an altitude of 145-155 m a.s.l. The aspect of the hybrid populations is determined by the morphology of the habitats; thus between the populations found at very close altitudes there is a high degree of differences. All the studied populations, including the ones closer to one of the species, present characteristics of the other species. The hybridizing area from Livada is situated at similar altitudes with other segments of the hybridizing area from the north-western Romania.
[Show abstract][Hide abstract] ABSTRACT: . The south-western part of Mehedinţi County comprises many herpetofauna species, compared to most regions in Romania. This is how we managed to encounter 14 amphibian species (Salamandra salamandra, Lissotriton vulgaris, Triturus cristatus, Triturus dobrogicus, Bombina bombina, Bombina variegata, Pelobates fuscus, Bufo bufo, Bufo viridis, Hyla arborea, Pelophylax ridibundus, Pelophylax lessonae, Rana dalmatina, Rana temporaria) plus Pelophylax kl. esculentus and 15 reptile species (Emys orbicularis, Testudo hermanni, Ablepharus kitaibelii, Lacerta agilis, Lacerta viridis, Podarcis muralis, Podarcis taurica, Darevskia praticola, Anguis fragilis, Zamenis longissimus, Dolichophis caspius, Coronella austriaca, Natrix natrix, Natrix tessellata, Vipera ammodytes). Salamandra salamandra, Bombina variegata and Rana temporaria were identified at very low altitudes, lower than any other indication from Romania up to present. This is explained by the fact that mountain valleys, bearing here a typical aspect, reach all the way to the Danube, carrying with them the occurring species. In Blahnita Plain, Darevskia praticola appears in cleared areas, being present in the vegetation girdles bordering the canals found between agricultural fields.
[Show abstract][Hide abstract] ABSTRACT: We analyzed the trophic spectrum of 86 Rana ridibunda individuals from Sarighiol de Deal, Tulcea County, Romania. The most important preys are represented by the Coleoptera, Diptera and Homeoptera (Cicada). Certain variations in feeding appear during the ontogenetic development, the juveniles feeding the most intensively, in the spectrum of which appear the lipid-rich Ephemeroptera larvae. The food diversity is negatively correlated with the feeding intensity, the males having the maximum diversity. The majority of preys have a terrestrial origin. The presence of different size preys indicates an opportunistic feeding
[Show abstract][Hide abstract] ABSTRACT: In the North-Western part of Romania (the Western Plains) we have identified Zootoca vivipara populations in 78 localities, at altitudes between 89 and 198 m. In this area, the distribution of the viviparous lizard is restricted to regions where the yearly average temperature is lower than 10 0C. In the Western Plains, the Zootoca vivipara populations are located in very humid habitats. They inhabit both forested and cleared wetlands, occupying marshes or the areas around plashes. In the Northern part of the Western Plains, the Zootoca vivipara populations from the plain are separated from the ones from the Oaş Mountains, by not more than 30 km.
[Show abstract][Hide abstract] ABSTRACT: In the Oaş region from North-Western Romania, Montandon's Newt Triturus montandoni is occurring even at 200 m a.s.l. Although this is the lowest altitude at which the species was recorded in Romania, numerous individuals can be found outside this distribution area in very different habitats, including artificial ones. In the study region, Triturus montandoni never appears in the same habitat with the Common Newt Triturus vulgaris, since it is present either alone or with the Great Crested Newt Triturus cristatus, though Triturus vulgaris is widely spread in the neighbouring regions.
North-Western Journal of Zoology 01/2007; · 0.71 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Ichthyosaura alpestris was encountered for the first time ever at low altitudes in the western region of the Poiana Ruscă Mountains. The species comes down to 208m a.s.l., being present in forest habitats. On the eastern side of the massif, I. alpestris is absent from low altitudes and it is rare even at normal altitudes. The presence of these populations at low altitudes in a region found at the limit of sub-Mediterranean influences is explained by the existence of a glacial refuge for I. alpestris in this area, which migrated very little to the east afterwards, due to the massif's particularities. Thus, the presence of low altitude I. alpestris populations from the Poiana Ruscă Mountains is similar with that from the Apuseni Mountains, being determined by the same factors.