Vitaly Osipov

• PhD
• Senior Researcher at State Nature Reserve "Privolzhskaya lesostep"

The aspect of the Russian desman Desmana moschata habitat conditions’ studies in fl oodplain of the Sura river lower course (State Nature Reserve “Prisursky” buffer zone, Middle Volga Region) is the assessment of the bottom invertebrates feeders’ competitive impact on desman population. The qualitative and quantitative analyzes of forage reserve and...

The aim of our study was to assess the ecosystem state of floodplain pondscapes by analyzing differences in fish assemblages between water bodies. Using QGIS, we identified 634 water bodies and delineated 49 pondscapes in the upper reaches of the Khoper River (Black Sea Basin), which is located in the center of European Russia. We surveyed 36 water...

Currently, global climate change has led to alterations in river discharge. In Eastern and Southern Europe, decreasing spring flood levels are observed, leading to drying and overgrowth of floodplain water bodies, especially in semiarid regions. Under such conditions, the scale of influence of the ecosystem engineer, the Eurasian beaver, which is o...

Обобщается информация об основных негативных факторах, влияющих на состояние пойменных водоемов, описываются самые распространенные последствия абиотических и биотических процессов, предлагаются возможные пути для сохранения пойменных водоемов. Приводятся свидетельства негативного влияния гидростроительства, обвалования пойм, спрямления русел, сель...

This review summarizes information on the main negative factors affecting the state of floodplain water bodies ecosystems, describes the most common consequences for abiotic and biotic processes, and suggests possible ways to conserve these ecosystems. Evidence of the negative impact of hydraulic construction, embanking of floodplains, channelizing...

In the Russian Federation, the protection category “Zapovednik” represents a strictly protected area, where the access is restricted and the aim is to keep the area “forever wild”. We provide an overview about the organization of these nature reserves and highlight their contribution to fundamental research. Aquatic ecosystems in zapovedniks provid...

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 thes...

The transfer of biomass and polyunsaturated fatty acids by the spadefoot P. vespertinus (previously subspecies of P. fuscus) from aquatic to terrestrial ecosystems was studied for five years in small floodplain water bodies of a forest-steppe zone. Average emergence of metamorphs from unit of water area, wet mass was 6.7 g m-2 year-1. A ratio of th...

In recent decades, the Eurasian beaver (Castor fiber) has once again become the keystone species in small river ecosystems in Russia. In many places, beaver activity has resulted in a significant change in lotic habitats, affecting the diversity, density, and biomass of aquatic organisms, including fish. While many studies have considered the ecosy...

The structure and dynamic of mollusk communities, as well as environmental factors influencing them, were analysed under conditions of small oxbow lakes in the forest-steppe zone (a case of the Khoper river valley, Penza region). 19 species of mollusks were found in the studied water bodies. The oxbows were characterized by relatively low alpha-div...

Background: 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...

The analysis of restoration of the number of Eurasian beaver (Castor fiber L.) in the reserves of the European part of Russia and the prediction of possible changes in ecosystems after its introduction into the reserves (Laplandsky, Darwinsky, Prioksko-Terrasny, Central Forest, Oksky, Mordovsky, Khopersky, Voronezhsky and Rdeysky) is presented. The...

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, con...

The aim of the study is to assess concentrations of compounds of biogenic elements (nitrates, nitrites, ammonium, phosphates) and to analyze their distribution in water bodies and water courses of the forest-steppe, where beavers have been reintroduced recently. The study was carried out in the State Nature Reserve Privolzhskaya Lesostep (Penza Reg...

A review of the distribution of the Chinese sleeper Perccottus glenii Dybowski, 1877 (Pisces, Odontobutidae) as an invasive species of fish in the territories of the reserves and national parks of the middle and lower Volga Region is presented. It occurs in 12 protected areas which is only 44.4% of the total number of protected areas. The invasion...

An estimation of sedimentation rate of suspended matter was done in beaver (Castor fiber) ponds and oxbows of the River Khoper valley (State Nature Reserve «Privolzhskaya Lesostep’», Penza region, Russia). In beaver ponds the sedimentation rate varied from 7.33 g/m2 per day to 71.81 g/m2 per day, in oxbows – from 7.83 g/m2 per day to 10.69 g/m2 per...

This is the first record of specific morphological deviations in the marsh frog on the territory of Russia. Similar anomalies were discovered by Jean Rostand in the 1950s in France and named by him as the "anomaly P". Our observations were made on the territory of the Privolzhskaya Lesostep' Nature Reserve (Penza region, Central Russia) in 2016 and...

The work presents the first results of annual monitoring of a beaver population on the territory of Ostrovtsovskaya Lesostep' (State Nature Reserve Privolzhskaya Lesostep', Penza region). In 2014–2017 all water-courses and water-bodies, including the River Khoper, River Selimutka, River Yuzhnaya and several oxbows of the Khoper were investigated tw...

The aim of our study was to identify the main abiotic factors that influence the biodiversity of forest-steppe oxbows in limnophase. Experiments were performed in 2016–2017 in Penza oblast, Central Russia. In addition to disturbed water exchange, isolated oxbows experienced such human influence as logging and plowing on watersides, and the construc...

In summer 2016, we investigated Ostrovtsovskaya Lesostep’ (Penza region, Russia) and caught more than 130 specimens belonging to 4 species of anuran amphibians. We found a symmetric case of “hyperxanthism” of the eyes (a new type of anomaly among amphibians) in one Rana arvalis specimen, one asymmetric amely in Bombina bombina, and 21 specimens of...

2 Институт проблем экологии и эволюции им. А. Н. Северцова РАН Россия, 117071, Москва, Ленинский просп., 33 3 Государственный природный заповедник «Присурский» Россия, 428034, Чебоксары, пос. Лесной, 9 Поступила в редакцию 31.07.16 г. О влиянии деятельности речного бобра – Castor fiber (Castoridae, Mammalia) на биоразнообразие экосистем малых рек л...

The study of the composition of fatty acid markers of tadpoles of cohabiting amphibian species for the first time revealed differences in their diets: the moor frog Rana arvalis prefers bacteria not associated with plant detritus, whereas the diet of the common spadefoot Pelobates fuscus is based on cyanobacteria, green algae, diatoms, and possibly...

The size and age composition of the population of Black and Caspian Sea sprat Clupeonella cultriventris, as well as the variation of the growth of fish in the reservoirs of the upper reaches of the Volga, are reported and a comparative analysis of group and individual variability of fish growth within the native (Caspian, Azov, and Black seas) and...

The study of beaver's (Castor fiber) impact on steppe rivers' ecosystems was held within the Privolzhskaya Lesostep' State Nature Reserve (Penza Province, Russia). We investigated how pond age and permanence of beaver ponds influenced the abundance and diversity of fishes and amphibians. The majority of beaver ponds in our study area were small and...

The fish populations were studied in the upper, middle and lower reaches of the river Tsivil. Generally 12 fish species were found. Among ones one kind is an alien, 2 species listed in the Red Book of the Chuvash Republic. The greatest fish numbers and diversity was observed in the water of lower reaches of this river. Alburnus alburnus (Linnaeu...

The study of beaver (Castor fiber) impact on steppe river ecosystems was conducted on the territory of the Nature Reserve Privolzhskaya Lesostep' (Penza region). Beavers settled the rivers from 2004 to 2012. The lack of food resources and permanent watercourses limits beavers spreading in steppe. The formation of stable long-term ponds is possible...

For the first time, modern data on the abundance and spatial distribution of rare species of cyclostomes and fish of the Penza region are summarized and presented. An inventory was made and recommendations were given on changing the status of rare species of fish listed in the Red Data Book.

09.08.10 г. Влияние средопреобразующей деятельности речного бобра Castor fiber L. на рыб-ные ассоциации малых рек заповедника «Приволжская лесостепь». – Осипов В. В. – На основе полевых исследований изучено влияние средопреобразующей деятельности боб-ра Castor fiber L. на рыбное население малых рек в заповеднике «Приволжская лесостепь». Выявлено, ч...

A method of Rybinsk Reservoir kilka Clupeonella cultriventris age determination using otolites is described. Terms of annual rings anlage on both scales and otolites are determined. A comparison of age estimates obtained through studying scales and otoliths by different operators is performed. It is shown that operators’ errors in age determination...

На основе полевых исследований, проведенных в 2002-2004 и 2006 гг., и анализа литературных данных показана динамика рыбного населе-ния Пензенского водохранилища. Выявлено, что за последние годы в водоеме произошло заметное перераспределение состава и численности основных промысловых видов рыб. На основе учетных уловов выявлено увеличение численност...

Without Abstract

Based on materials of 2000–2003, the characteristics of the distribution, size-age composition, and growth rate of Clupeonella cultrivensis from the Rybinsk Reservoir is given. Comparative data on reservoirs of the Middle Volga are provided. It is shown that, during these three years, C. cultriventris was distributed unevenly over stretches of wate...