Автор: Иванов Александр Юрьевич
| Название: | О генетической неоднородности населения озерных лягушек Крыма, выявляемой по результатам анализа митохондриальной и ядерной ДНК (Pelophylax (ridibundus) complex; Anura, Ranidae) | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2018 | |
| Дата загрузки: | 03.12.2019 | |
| Издательство: | Пензенский государственный университет (Пенза) | |
| Название: | The first record of natural transfer of mitochondrial dna from pelophylax cf. Bedriagae into p. lessonae (amphibia | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2019 | |
| Дата загрузки: | 10.11.2019 | |
| Издательство: | Фонд «Медвежья Земля» | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | Молекулярно-генетическая характеристика гибридов зеленых лягушек на востоке ареала | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2019 | |
| Дата загрузки: | 10.11.2019 | |
| Издательство: | Марийский государственный университет | |
| Название: | Трехлетний мониторинг аномалии Ростана в популяциях озерной лягушки «Островцовской лесостепи» | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2019 | |
| Дата загрузки: | 10.11.2019 | |
| Издательство: | Марийский государственный университет | |
| Название: | Филогеография прыткой ящерицы в Крыму по результатам анализа гена цитохрома b: древний рефугиум на полуострове, поздняя экспансия с севера и первые свидетельства гибридизации подвидов Lacerta agilis tauridica и L. a. exigua (Lacertidae: Sauria). | 
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| Тематика: | физико-математические науки | |
| Вид ресурса: | электронное немультимедийное издание | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2020 | |
| Дата загрузки: | 26.11.2020 | |
| Издательство: | Российская академия наук | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | New multiplex pcr method for identification of East European green frog species and their hybrids | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | A molecular multiplex PCR method for identification of East European green frog species (Pelophylax ridibundus, P. cf. bedriagae and P. lessonae) and their hybrids was developed. This simple and rapid method can be used for identification of species-specific mitochondrial and nuclear DNA. The method is based on species-specific differences in primary structure of the subunit 1 of the mitochondrial cytochrome C oxidase gene (COI) and the intron-1 of the nuclear serum albumin gene (SAI-1). Based on the method, we analyzed numerous individuals of these species and their hybrids from East European Plain, the Crimea, the Caucasus, the Ural, as well as introduced populations from Western Siberia and the Kamchatka. In all cases, identification of species performed by use of the multiplex PCR method coincided with results of study of primary nucleotide sequences. | |
| Дата издания: | 2019 | |
| Дата загрузки: | 02.12.2020 | |
| Издательство: | Folium Publishing Company | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | A mollusk Planorbarius corneus is an intermediate host of the infectious agent of rostand’s “anomaly p” in green frogs | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Here we present the first new data about the mysterious "anomaly P" of green frogs (genus Pelophylax) in about 50 years. We established that the gastropod Planorbarius corneus could be an intermediate host (or vector) of the infectious agent of the anomaly P. Symmetrical cases of polydactyly, the anomaly "cross" and heavy cases of the anomaly P, which were previously found in natural populations in the European part of Russia and recently obtained in laboratory, can be caused by this infectious agent. As the most probable cause, we assume a species of trematodes, for which the first intermediate host is P. corneus, from which they infest tadpoles of green frogs. | |
| Дата издания: | 2019 | |
| Дата загрузки: | 02.12.2020 | |
| Издательство: | Folium Publishing Company | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | Strigea robusta causes polydactyly and severe forms of Rostand's anomaly P in water frogs | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Cases of polydactyly in natural populations of amphibians have attracted great interest from biologists. At the end of the 1940s, the French biologist Jean Rostand discovered a polymorphic syndrome in some water frog (Anura: Pelophylax) populations that included polydactyly and some severe morphological anomalies (he called it 'anomaly P'). The cause of this anomaly remains unknown for 70 years. In a previous study, we obtained anomaly P in the laboratory in tadpoles of water frogs that developed together with molluscs Planorbarius corneus (Mollusca: Gastropoda) collected in the field. We thus proposed the 'trematode hypothesis', according to which the infectious agent responsible for anomaly P is a trematode species.MethodsMetacercariae from tadpoles with anomaly P were identified using ITS2 gene sequencing as Strigea robusta (Trematoda: Strigeidae). To verify teratogenic features of the species, cercariae of S. robusta were tested for the possibility to cause anomalies. Identification of cercariae species was made using morphological and molecular methods (sequencing of ITS2 and 28S rRNA). The tadpoles were exposed to parasites at four doses of cercariae (control, low, medium and high) and divided into two groups: "early" (at 25-27 Gosner stages) and "late" (at 29-34 Gosner stages) exposure. Results A total of 58 (72.5%) tadpoles survived until metamorphosis under the dose-dependent experiment with the trematode S. robusta. Differences in the survival rates were observed between the exposed and unexposed tadpoles both in the group of "early" tadpoles and "late" tadpoles. The exposure of tadpoles to the cercariae of S. robusta induced anomaly P in 82% of surviving tadpoles. The severe forms developed only in "early" stages under all doses of cercariae exposure. Polydactyly predominantly developed in the "late" stages; under a light exposure dose, polydactyly also developed in "early" tadpoles. Laboratory-hatched tadpoles reared together with infected snails had different rates of survival and complexity of deformations associated with the period of coexistence. ConclusionsThe experiments with direct cercariae exposure provide compelling evidence that S. robusta leads to anomaly P in tadpoles of water frogs. The manifestation of anomaly P turned out to be dependent on the stage of development, cercariae dose, and the location of the cysts. | |
| Дата издания: | 2020 | |
| Дата загрузки: | 23.11.2020 | |
| Издательство: | BioMed Central Ltd. | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | A record of alien pelophylax species and widespread mitochondrial dna transfer in kaliningradskaya oblast’ (The baltic coast, russia) | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Alien species can strongly impact local environments and compete against native species, which can lead to their extinction. Marsh frogs of the Pelophylax ridibundus complex are one of the most invasive amphibians in Northern Eurasia. It was previously thought that three water frog species of the genus Pelophylax (the marsh frog, P. ridibundus, the pool frog, P. lessonae and their hemiclonal hybrid, the edible frog, P. esculentus) inhabited Kaliningradskaya Oblast' along the Russian Baltic coast. However, based on our study of the intron-1 of the nuclear serum albumin gene, two other marsh frog species were detected (the Balkan marsh frog, P. kurtmuelleri, and the Anatolian marsh frog, P. cf. bedriagae) as well as putative hybrids between P. ridibundus and P. cf. bedriagae. The majority of individuals of P. ridibundus and hybrids between P. ridibundus and P. cf. bedriagae had mitochondrial (mt) DNA of P. lessonae, while all others featured the P. kurtmuelleri mtDNA. The prevalence of P. lessonae mtDNA haplotypes in populations of P. ridibundus from the Baltic Coast of Russia suggests that local individuals of the latter species originated from crosses between P. esculentus individuals. Two hypotheses could explain the records of P. kurtmuelleri and P. cf. bedriagae in the region. The establishment of local populations of the first species could have occurred via postglacial dispersal from the Balkan refugium. The origin of local P. cf. bedriagae could be an occasional introduction of individuals from the Ponto-Caspian region. Since our study is preliminary (19 individuals), in the future it would be important to continue the study of water frogs in Kaliningradskaya Oblast' and neighboring countries by applying multiple genetic markers. Additional genetic markers will enable researchers to study routes of dispersal and introductions of marsh frogs, to clarify peculiarities of their hybridization and distribution, and to evaluate the impact of P. kurtmuelleri and P. cf. bedriagae on the reproduction success of hybridogenous populations and abundance of local amphibians. | |
| Дата издания: | 2020 | |
| Дата загрузки: | 23.11.2020 | |
| Издательство: | Regional Euro-Asian Biological Invasions Centre | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | New records of the anomaly P syndrome in two water frog species (Pelophylax ridibundus and P. Lessonae) in Russia | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | The "anomaly P" was described in Palearctic water frogs of the genus Pelophylax by Jean Rostand as complex morphological anomalies of water frogs, including polydactyly, brachymely, hind limb oedema, bone outgrowths, spikes, flexions and additional limbs in the inguinal region. In 2016, the anomaly P syndrome was rediscovered in central Russia, confirming the hypothesis concerning its wider distribution. Here, three new records of this syndrome in two species of western Palearctic water frog from Russia are described. | |
| Дата издания: | 2019 | |
| Дата загрузки: | 23.11.2020 | |
| Издательство: | PENSOFT PUBLISHERS | |
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ИР получен из базы данных "Scopus" автоматически
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| Название: | КРАСНАЯ КНИГА ПЕНЗЕНСКОЙ ОБЛАСТИ | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Словарь основных терминов (глоссарий) | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2019 | |
| Дата загрузки: | 02.12.2020 | |
| Издательство: | Воронежская областная типография - издательство им. Е. А. Болховитинова | |
| Название: | A development of a PCR-RFLP test system for the identification of mitochondrial lines of the Pelophylax ridibundus lake frog in Kazakhstan | 
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Background. Molecular typing by PCR-RFLP method allows to identify the spe-cific attribution of an organism that has a weak phenotypic difference. The main advantage of this research method is the capacity to analyze a large number of samples without apply-ing the sequencing method. The purpose of the work is to develop a test-system for the identification the matrilines of marsh frogs of the Pelophylax ridibundus complex from Kazakhstan. Materials and methods. The analysis was based on the variability of the prima-ry structure of the mitochondrial gene the second subunit of dehydrogenase (ND2) which is a species-specific marker. Subsequently a search for marker nucleotide substitutions speci-fic for each lineage and recognition sites for the HaeIII and TasI restriction endonucleases was conducted. Results. As a result of the research, it was confirmed that on the territory of Kazakhstan inhabiting three main forms of lake frogs where two of them are native (Balkhash, Syrdarya), and invasive Anatolian form - P. cf. bedriagae. Conclusions. The authorsʼ PCR-RLFP test technique is a straightforward and reliable tool for detecting mitochondrial lineages in the Pelophylax ridibundus complex marsh frogs and may be used successfully in mass screening investigations. | |
| Дата издания: | 2022 | |
| Дата загрузки: | 03.11.2022 | |
| Издательство: | Пензенский государственный университет (Пенза) | |
| Название: | Diversity of trematodes from the amphibian anomaly P hotspot: Role of planorbid snails |
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Trematode infection of the second intermediate hosts can lead to changes in their fitness and, as a result, a change in the invasion rate of animal communities. It is especially pronounced during the invasion of parasite species that reduce activity due to the manipulation of hosts through the changes of their morphology and physiology. One of these cases is an anomaly P syndrome hotspot found in some populations of water frogs and toads in Europe caused by the trematode Strigea robusta metacercariae. The occurrence of pathogen and their participation in ecosystems are intrigues questions in the anomaly P phenomenon, as well as the role of planorbid snails that serve as the first intermediate hosts for many trematode species. Herein, we focused on trematodes spectra from planorbid snails and amphibians from the anomaly P hosts with the aim to undetected interactions between the pathways of parasites. Emerging cercariae of 6802 planorbid snails of dominant species (Planorbarius corneus, Planorbis planorbis, and Anisus spp.) were detected by both morphological and molecular methods in seven waterbodies in Privolzhskaya Lesostep Nature Reserve (Russia). A total of 95 sequences of 18 species were received, and 48 sequences were unique and did not present in any genetic databases. The 18 species of trematodes from snails and 14 species of trematodes from amphibian hosts (Pelophylax ridibundus; Ranidae; Anura) were detected. Three species (Echinostoma nasincovae, Tylodelphys circibuteonis and Australapatemon burti) was new for the trematode fauna of the Middle Volga River region and Russia as a whole. Eleven species of parasitic flatworms have amphibians in their life cycles and nine species used amphibians as metacercariae hosts: Echinostoma nasincovae, E. miyagawai, Echinoparyphium recurvatum, Tylodelphys circibuteonis, Neodiplostomum spathula, Paralepoderma cloacicola, Macrodera longicollis, Strigea robusta, and Strigea strigis. The occurrence of trematode species from planorbid mollusks and frogs were compared. | |
| Дата издания: | 2023 | |
| Дата загрузки: | 23.10.2023 | |
| Издательство: | Public Library of Science | |
| Название: | Riverine barriers and geographic variation in little ground squirrel (Spermophilus pygmaeus, Sciuridae, Rodentia) based on mitochondrial cytochrome b gene sequences |
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Дата издания: | 2023 | |
| Дата загрузки: | 23.10.2023 | |
| Издательство: | KMK Scientific Press | |
| Название: | Detection of glacial refugia and post-glacial colonization routes of morphologically cryptic marsh frog species (Anura: Ranidae: Pelophylax) using environmental niche modeling |
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| Тематика: | биология | |
| Вид ресурса: | электронная копия бумажного издания | |
| Тип ресурса: | Статья | |
| Целевое назначение: | Научное | |
| Целевая аудитория: | Исследователь | |
| Аннотация: | Studying the distribution of morphologically cryptic animal species is always a very difficult task. Because most marsh frog species (the Pelophylax ridibundus complex) are cryptic, we used molecular markers to identify them. Three marsh frog species (P. ridibundus, P. kurtmuelleri and P. cf. bedriagae) inhabit the northern part of Western Palearctic. We created a database of localities and built models of their modern distribution. These models showed that the most suitable habitats are on the north of the Mediterranean region for P. cf. bedriagae, temperate Europe for P. ridibundus, and the Balkan coastal areas for P. kurtmuelleri. The projection of the modern ecological niches under the late-Quaternary climatic conditions showed that the range of P. kurtmuelleri remained largely unchanged during the period, whereas the ranges of P. cf. bedriagae and especially P. ridibundus changed greatly over time. During the Last Glacial Maximum, the presumed range of P. cf. bedriagae covered a relatively large area in the north of the Mediterranean region and the south of European Russia. Glacial refugia of P. ridibundus were apparently located in the northern Balkans, the northern coast of the Black and Azov seas, and possibly in Western Europe. The northward long-distance post-glacial dispersal of P. ridibundus occurred from refugia in the northeastern Balkans and the Black-Azov seas region. Since the Late Pleistocene, suitable habitats for P. cf. bedriagae in southern Russia began to decline, but local habitats for P. ridibundus become more suitable. Therefore, a mosaic of populations consisting of these both species and their hybrids has now been found here. | |
| Дата издания: | 2024 | |
| Дата загрузки: | 13.10.2024 | |
| Издательство: | Multidisciplinary Digital Publishing Institute (MDPI) | |