Статьи

The size, weight and sexual structure of several populations of mature individuals of the common spadefoot was analyzed in five lakes of the Medveditsa floodplain (Saratov Region, Lysogorsky District) in 2009 - 2016. The body length of the males participating in reproduction ranged from 29.0 to 56.0 mm (the weight from 2.35 to 20.87 g), and that of females ranged from 29.3 to 59.2 mm (the weight from 2.64 to 22.33 g). In most P.

Morphometric characteristics of Bombina bombina males and females were done. 10 traits were measured and 10 indices were calculated for a sample of B. bombina from the population of the lake Cherepashie (the Medveditsa river valley, Lysogorsky district, Saratov region). Only some traits show significant sex-ual differences in B. bombina.

The size, weight and sexual structure of Pelophylax ridibundus and Bombina bombina populations was analyzed during their spawning migrations in 2013 - 2015 in four lakes of the Medveditsa River flood-plane (Saratov Region, Lysogorsky District).

The structure of the spawning anuran taxocenoses in five floodplain lakes in the Medveditsa river valley in 2009 - 2016 was analyzed. Degradation of the populations of the three most numerous species and a decreased degree of dominance of the spadefoot toad were established. This degradation strongly affects the species with a longer distance of spawning migrations - the severity of the changes sequentially decreases in the row: Pelophylax ridibundus → Pelobates fuscus → Bombina bombina.

An annotated list of amphibian and reptile species of the Russian Far East is presented with due account of modern data on the taxa systematics. 13 Amphibian species and 27 reptile ones have been reliably registered by now, including several random sea species.

The author has collected and integrated records on 7 amphibian species and 9 reptile ones in the Evreiskaya Autonomous Oblast’ (Russian Federation). Most of these species are found to be distributed in the mountain-forest area of the region, which is due to a combination of several factors (temperature limits, the availability of refuges, and food base).

The paper presents data on the variability of basic morphological characters of the sand lizard (Lacerta agilis) inhabiting the vicinities of the cities Tyumen (Western Siberia) and Sterlitamak (Southern Urals). Five subtypes of back coloration were identified. Typical and atypical variants of the coloration pattern are described. A high level of the genetic variability of the ISSR markers of sand lizards was revealed. It was significantly lower in the group of mature individuals as compared to juveniles.

The results of our first short-term study of a unique Rana temporaria population in May, 2015, are reported. This population was formed in the southern Kamchatka as a result of releasing 150 immature frogs in the spring of 2005. The numbers of breeding females was 2,648 in 2015. The activity season duration at the release locality (4 months) is 2 months shorter than that at the original locality of the translocated frogs in Moscow district.

When studying the late Cenozoic history of amphibians and reptiles, a number of problems arise, associated with obtaining and interpretation of factual material. First of all, the author considers peculiarities of obtaining and identifying fossil material, which strongly affects the amount and quality of paleontological data. Most biologists are not familiar with them. These are problems of taphonomy, demand, economy, personnel, collection and systematic problems.

The adder is a usual, locally-numerous species, occurring sporadically in most parts of the Vladimir Region: everywhere in the Meshchersky Lowland and Prinerlinski District, sporadically on the Kovrovsko-Kasimovskoe Plateau, Klin-Dmitrov Ridge, in the Opole. The largest adder populations are in Yuryev-Polsky District. The adder occurrence in different habitats varies from 0.01 to 1.33 individuals per 1 km route. The maximum adder occurrence is in Kovrov (1.33 ind. / km) Vyaznikovsky (0.83 ind. / km) and Kameshkovski (0.44 ind. / km) Districts.