Pelophylax ridibundus

Variation of age composition and postmetamorphic growth rates in Pelophylax ridibundus (Ranidae, Anura): Comparison populations from Moscow region and Kamchatka

Authors: Lyapkov S. M., Bryakova M. A.

Using skeletochronology, the age composition and growth rates of Pelophylax ridibundus population from the Eastern European part of the native range (Zvenigorod Biological station (ZBS) of Lomonosov Moscow State University, Moscow region) were compared with introduced populations of Kamchatka, differing in the duration of the activity season (T). Both females and males of the ZBS population (T = 5.5 months) reach maturity after the 3rd wintering.

Amphibians of the Orenburg State Nature Reserve (Russia)

Authors: Gorelov R. A., Bakiev A. G.

Literary information about the batrachofauna of the Orenburg nature reserve is incomplete and contradictory. Data on the specific composition and abundance of amphibians in the Orenburg Nature State Reserve at its five cluster territories by the results of our 2015–2020 inventory are presented. The previously published materials about amphibians on the cluster territories “Talovskaya Steppe”, “Burtinskaya Steppe” and “Aytuarskaya Steppe” have been supplemented.

Hemoparasites of the Lake Frog Pelophylax ridibundus (Pallas, 1771) (Ranidae, Anura) Inhabiting Reservoirs of the North-Western Ciscaucasia

Authors: Peskova T. Y., Bachevskaya O. N., Plotnikov G. K.

The results of our study of the hemoparasites of the lake frog inhabiting the North-Western Ciscaucasian reservoirs are presented. It was found that the parasites are represented by three species, namely: the sporozoa Hepatozoon magna and Dactylosoma ranarum, and Microfilaria. Differences in the erythrocyte morphology of the lake frog when infected by sporozoa were identified. Dactylosoma ranarum does not alter the size of the erythrocytes affected.

STRUCTURAL DYNAMICS OF THE SPAWNING ANURAN TAXOCENOSES IN FLOODPLAIN LAKES OF THE MEDVEDITSA RIVER VALLEY (SARATOV REGION)

Authors: Yermokhin M. V., Tabachishin V. G., Ivanov G. A.

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. The structural parameters in the lakes of Lebyazhye and Koblovo were stable.

PRELIMINARY DATA ON THE MOLECULAR GENETIC STRUCTURE OF PELOPHYLAX RIDIBUNDUS (AMPHIBIA: ANURA: RANIDAE) FROM THE SOUTHERN PART OF THE CRIMEAN PENINSULA, BASED ON MITOCHONDRIAL AND NUCLEAR DNA ANALYSIS

Authors: Faizulin A. I., Kukushkin O. V., Ivanov A. Y., Ermakov O. A.

Molecular genetic analysis of 28 marsh frogs Pelophylax ridibundus complex from 12 localities of the Crimean peninsula was conducted by two molecular markers, namely, COI, the gene of the first subunit of cytochromeoxydase mtDNA, and SAI-1, the first intron of the serum albumin gene nDNA. It has been found that the mtDNA type specific for the “eastern” form (the Anatolian P. cf. bedriagae) prevails for the Crimean marsh frogs, while the mtDNA type of the “western” form (the Central-European P.

SIZE-WEIGHT AND SEXUAL STRUCTURE OF PELOPHILAX RIDIBUNDUS AND BOMBINA BOMBINA (AMPHIBIA, ANURA) POPULATIONS IN THE FLOODPLANE OF THE MEDVEDITSA RIVER (SARATOV REGION)

Authors: Yermokhin M. V., Tabachishin V. G., Ivanov G. A.

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 body length of Pelophylax ridibundus males ranged from 29.3 to 101.3 mm (the weight from 2.10 to 152.2 g), and that of females did from 36.1 to 120.2 mm (the weight from 4.45 to 181.0 g); for Bombina bombina males - from 25.4 to 50.6 mm (the weight from 1.06 to 8.5 g), and that of females from 32.1 to 49.7 mm (the weight from 2.64 to 8.43 g).

REPRODUCTIVE STRUCTURE OF A HEMIPOPULATION OF COSMOCERCA ORNATA (NEMATODA: COSMOCERCIDAE) IN MARSH FROGS PELOPHYLAX RIDIBUNDUS (PALLAS, 1771) (ANURA: RANIDAE) OF SEVERAL PHENOTYPES

Authors: Kirillova N. Y., Kirillov A. A.

The reproductive structure of Cosmocerca ornata (Dujardin, 1845) in marsh frogs (Pelophylax ridibundus (Pallas, 1771)) of both the striata and non-striata phenotypes was studied. Distinctions in the physiology, ecology and behavior of striped and unstriped amphibians have certain influence on the intensity of processes of the host infestation and maturing of C. ornata in frogs of different phenotypes. Analysis of the age structure of the C.

ON THE WINTER ACTIVITY OF MARSH FROG – PELOPHYLAX RIDIBUNDUS IN THE BALAKOVO NPS COOLING POND

Authors: Voronin M. Y., Yermokhin M. V.

Abnormal activity of Pelophylax ridibundus in the cooling pond of the Balakovo NPS (Saratov region) was detected during the winter period of 2003. The temperature range within which this activity was observed corresponds to that for the exit of individuals of this species from wintering during the spring period.

REPRODUCTIVE PARAMETERS OF BOMBINA BOMBINA AND PELOPHYLAX RIDIBUNDUS (AMPHIBIA, ANURA) FEMALES AS FUNCTIONS OF THEIR SIZE AND WEIGHT CHARACTERISTICS

Authors: Yermokhin M. V., Tabachishin V. G., Ivanov G. A., Rybal’chenko D. A.

Based on field surveys in 2013 – 2015 of four local populations of Bombina bombina and Pelophylax ridibundus in spawning lakes in the Medveditsa river valley (Saratov region) it was found that the body length (SVL) and weight of mature females of B. bombina and P. ridibundus ranged from 31.1 to 49.7 mm and from 63.1 to 138.1 mm; from 2.64 to 8.43 g and from 25.4 to 181.0 g, respectively.