Articles

Comparative Characteristics of Morphometric and Reproductive Parameters of the Common Brown Frog, Rana temporaria (Amphipia, Ranidae) from the Populations of Old and New Moscow

The paper discusses the results of our study of the variability of some morphometric and reproductive characteristics in the common brown frog, Rana temporaria, from two populations of the Moscow city. The first population exists in isolation in the Timiryazev Forest Park, for a long time surrounded by districts with multi-storey buildings. The second population is located on the territory with mainly rural buildings (the settlement Kokoshkino), recently annexed to Moscow. The size and reproductive parameters in frogs from these two localities were compared.

On the Ecology of the Desert Sand Boa Eryx milliaris (Reptilia, Boidae) in Kalmykia

The paper contains data on the inhabitation, abundance and temperature selectiveness of the desert sand boa in Kalmykia. Bioclimatic variables influencing its range are also analyzed by modeling with the Maxent software. Two models were used in our analysis, built on 19 standard bioclimatic variables and on a shortlist after the removal of correlated variables. The body temperature of the desert sand boa varied from 12 to 33°С. Its population level stays rather high in Kalmykia, up to two specimen per ha on sand hills of the Chernozemelskiy district.

Growth, Survival and Live Feed Utilization Efficiency of the Hyrcanian Meadow Lizard, Darevskia praticola hyrcanica (Lacertidae, Reptilia) in Captivity

The paper presents materials on growing and winter hibernation of the Hyrcanian meadow lizard, Darevskia praticola hyrcanica, in artificial conditions. Juveniles were obtained from the captive breeding of lizards caught on the typical locality of this subspecies (Gadazyghahi Natural Boundary, the Talysh Mountains, Astara District, Azerbaijan) in the first decade of May, 2016. Immediately after leaving the eggs, newborn lizards were placed in groups of 5 specimens each into plastic 39×28×28 cm containers. Six groups were formed in total, and our research involved 30 lizards.

Taxonomy, Phylogeny and Distribution of Phrynocephalus (superspecies guttatus) (Reptilia: Agamidae)

7 qualitative pholidosis characters were revealed, according to which the phylogenetic groups of spotted toad-headed agamas, Phrynocephalus (superspecies guttatus), reliably differ from each other, and a diagnostic key was designed based thereon for distinguishing representatives of the group. Molecular phylogenetic analysis of a fragment of the COI gene of mtDNA confirmed the differentiation of Ph. melanurus in two lineages; also Ph. incertus and Ph. kuschakewitschi stand apart with high supports. The subspecies Ph. g.

Community of Reptiles in the Sandy Habitats of the Ferghana Valley (Uzbekistan) and the Endemic Species Conservation Problem

In 2018–2019, isolated sandy habitats in the Ferghana oasis were surveyed. The reptile communities in the sands had a similar structure and very high population density, reaching up to 144 ind./ha. In all habitats, two racerunner species absolutely predominated, namely, Eremias velox and Eremias scripta, which accounted from 56.9 to 94.5% of the total abundance. In some habitats the dominants included Rustamov’s plate-tailed gecko and Strauch’s toad-headed agama.

Data on the Distribution of the Crimean Wall Lizard, Podarcis tauricus (Pallas, 1814) (Sauria: Lacertidae), in the North-Western Black Sea Region (Ukraine)

Novel data on the distribution, habitats and population density of the Crimean (Balkan) wall lizard, Podarcis tauricus (Pallas, 1814) in the Odessa Province of the Ukraine are given. For the majority of the localities known from the literature data in the Pre-Danube Region, the current dwelling of the species was confirmed, and its population density over limited areas remains quite high, namely: from 5–10 to 70–100 specimens/1000 sq. m. The northernmost point of the P.

Growing of Larvae of the Caucasian Smooth Newt, Lissotriton lantzi (Wolterstorff, 1914) (Amphibia, Caudata) at Various Temperatures

Lantz’s newt, or the Caucasian smooth newt, Lissotriton lantzi, is an endemic species of Caucasian forests. It was included in the Red Data Books of the Russian Federation and Republic of Azerbaijan. The design of a technology for keeping and reproducing this species in captivity will help its conservation. The paper discusses the results of larval growing of Lantz's newt at several temperatures. Newts were obtained from reproduction in artificial conditions.

Amphibian Scientific Collection of the Zoological Museum of Saratov State University as the Basis for the Regional Cadastre

The characteristic is given and the taxonomic structure of the modern bathrachological collection of the Zoological Museum of the Saratov National Research State University named after N. G. Chernyshevsky is analyzed. Currently, it has 1903 specimens of amphibians belonging to 46 species of 13 families. The Ranidae family is the most fully presented one (43.3% of the total number of storage units). In total, the Ranidae collection contains 711 specimens of 10 frog species, of which 2 species (569 specimens) account for Saratov regional collections.

Male Reproductive Cycle in a Population of the Common Lizard Zootoca vivipara (Squamata, Lacertidae) from Southeast of Western Siberia

Widely distributed reptile species are characterized by reproductive plasticity, which may also appear as variations of the reproductive cycles. To understand the specificity of the male reproductive cycle of Zootoca vivipara in the Asian part of its range, males from the Tomsk population (the southeast of the Western Siberia) caught from April till July 2017 were studied (n = 27).

New Approaches to Collecting Reproductive Material from Amphibians for its Use in Artificial Fertilization

This paper describes new methods for obtaining viable ovulated oocytes and testicular sperm from the carcasses of females and males of the common frog Rana temporaria, stored at +4ºС for 1–7 days. In addition, a new approach to delayed collection (1 to 30 days) of ovulated oocytes from live female frogs of the same species is given. Part of the frog testicular spermatozoa is shown to retain motility (21.0±1.5%) and fertilizing ability (13.2±1.9%) even after 6 days of storage at +4°C in the carcasses of males.

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