Sergey Naidenko

Russian Academy of Sciences | RAS · Department of ecological and evolutionary aspects of animal behavior and communications

This data file includes the list of articles and issues previously published in the journal “Nature Conservation Research” (https://ncr-journal.bear-land.org/). All articles are grouped by the research thematic. As an explanation of each article, a brief (one sentence) description is provided by highlighting its contents. The Archive of the journa...

The regular issue 9(1) of the journal «Nature Conservation Research» (http://ncr-journal.bear-land.org/) has been released. It is stored here: https://ncr-journal.bear-land.org/journal/47. The cover page shows a skua (Stercorarius maccormicki) in flight on the Haswell Archipelago, Davis Sea (Author: Dr. S.V. Golubev). This issue of the journal «Nat...

Aiming to answer the question of how the rest-activity cycle and subcutaneous temperature change with a decrease in ambient temperature, we studied the following species of predatory mammals: domestic cats (Felis catus, n = 4), Far Eastern forest (Amur) cats (Prionailurus bengalensis euptilura, n = 3), Eurasian lynxes (Lynx lynx, n = 3), sables (Ma...

Clinical blood analysis is considered not only a method of assessing the health status of individuals, but also their fitness and welfare, although the interpretation of the obtained data is complicated by the combined influence of various factors. For most wild carnivore species, there is insufficient information about the effect of environmental...

Polymorphism of nine microsatellite loci in the Sikhote-Alin tiger population was analyzed in the modern and recent historical periods, using blood, excrement, and museum bone samples. Tests for excess heterozygosity to determine whether the population went through a period of low abundance and a low value of the Garza–Williamson coefficient indica...

The regular issue 8(4) of the journal “Nature Conservation Research” (http://ncr-journal.bear-land.org/) has been released. It is stored here: https://ncr-journal.bear-land.org/journal/46. The cover page shows Momotus mexicanus Swainson, 1827 (Aves: Coraciiformes: Momotidae) in the Communal Natural Protected Area El Gavilán, Oaxaca state, Mexico (A...

This study investigates the frequency, temporal and power parameters in 11 (5 males, 6 females) captive feral domestic cats Felis silvestris catus, vocalising in their individual outdoor enclosures during the mating season. Discriminant function analysis (DFA) classified the meows to correct callers with 79.2% accuracy, which exceeded the chance le...

The polymorphism of 9 microsatellite loci of the Sikhote-Alin tiger population in the modern and recent historical period was analyzed using blood, excrement, and museum bone samples. Tests for a population going through a period of low abundance in the analysis of excess heterozygotes and a low value of the Garza-Williamson coefficient indicate a...

The study presents the status and diversity of major histocompatibility complex (MHC) class I genes in the Far Eastern leopard (Panthera pardus orientalis). 20 alleles of MHC genes were obtained from 11 samples in total, 19 alleles were described for the first time for the species. A high diversity of alleles is shown at the level of individuals as...

The regular issue 8(3) of the journal “Nature Conservation Research” (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/45. The cover shows rocky outcrops on the Malaya Bakhilova Mount, as a habitat of the relic species, Chrysolina roddi (Jakobson, 1897) (Coleoptera) (Author: PhD S.V....

The Polar bear’s seropositivity from the Barents Sea subpopulation to a number of pathogens was analyzed: Canine distemper virus, Herpes simplex virus, Parvovirus, Toxoplasma, Trichinella (Trichinella sp.), Mycoplasma (Mycoplasma sp.), Candida (Candida sp.) and Chlamydia (Chlamydia sp.). Seropositive animals have been identified for Canine distempe...

Chukotka scientists collected samples from organs and tissues of Gray whales after aboriginal whaling and landing by Chukotka Natives in 2008-2022. Natives of Chukotka consume intestines and meat of whales and walruses. That is why we analyzed the concentrations of heavy metals and radioactivity levels, which never exceeded the MPL in the studied i...

The regular issue 8(2) of the journal “Nature Conservation Research” (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/44. The cover shows Cuora bourreti (Obst & Reimann, 1994) in the Bach Ma National Park, Vietnam (Author: Benjamin Leprince). This issue of the journal “Nature Conserv...

For the first time, information is provided on the size of the home range of Siberian forest reindeer (Rangifer tarandus valentinae) of the Altai-Sayan population of Kuznetsk Alatau, the minimum distance that the deer passes per day, their changes, and changes of habitats during the annual cycle. Possible reasons for the cyclical use of the habitat...

The aim of this study was to test the hypothesis that the level of sexual dimorphism modulates the effects of male-female social interaction on the female physiological condition in felids. We predicted that: 1 - contacts of females with males in species with low level of sexual dimorphism in body size will not lead to significant changes in the ac...

Reproduction of endangered species in captivity is an urgent problem for the conservation and restoration of biodiversity. For mammals, including felids, assessing and monitoring of pregnancy progression is fundamental for successful breeding. For the first time, changes in the concentrations of serum amyloid A (SAA), the main protein of the acute...

The regular issue 8(1) of the journal “Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/43. The cover shows Saguinus leucopus, Silvery-brown tamarin, a Vulnerable and endemic species in the Peasant Reserve Zone-Cimitarra River, middle Magdalena Valley, C...

For the first time, information is provided on the size of the home range of the Siberian forest reindeer (Rangifer tarandus valentinae) of the Altai-Sayan population of the Kuznetsk Alatau, the minimum distance that the deer passes per day, their changes and changes of habitats during the annual cycle. Possible reasons for the cyclical use of the...

Hair can be a useful matrix to examine the hormonal status of an animal, although it is difficult to correlate the results to a specific time point. The aim of this study was to evaluate seasonal changes in cortisol and testosterone levels in the hair of four feline species (lynx, Lynx lynx, n = 8; Amur wildcat, Prionailurus bengalensis euptilurus,...

The regular issue 6(4) of the journal “Nature Conservation Research” (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/42. The cover shows calve of Procarpa gutturosa Pallas, 1777 (Bovidae) in the buffer zone of the Daursky State Nature Reserve, Russia (Author: Dr. Galina S. Ale...

Procapra gutturosa (hereinafter – Mongolian gazelle) is one of the last large migratory mammal species in Asia, which population has declined considerably over the past century due to various anthropogenic factors. In Russia, the Mongolian gazelle inhabits the north of its natural range, which supposes suboptimal conditions for this species, and it...

A reintroduction project has started in Russia in 2007 with the goal to create a Per- sian leopard population nucleus in the northern part of its historical range, where the species disappeared due to direct and indirect human influence in mid-20th cen- tury. A small resident group should give opportunity of breeding also for leopards migrating nat...

The regular issue 7(3) of the journal “Nature Conservation Research” (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/41. The cover shows Orchis canariensis (Orchidaceae) from la Caldera de los Marteles, Gran Canaria, Canary Islands, Spain (Author: Dr. Jacopo Calevo). This issue of t...

The article describes the results of a pilot study of the reproduction features of a small population of feral horses (Equus ferus) isolated for about 70 years on the Vodny Island in the Lake Manych-Gudilo (Rostov Nature Reserve, Rostov Region, Russia). The population was characterized by a fairly stable social structure for more than 10 years, inc...

The regular issue 7(2) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/40. The cover shows staminate flowers of Baccharis macrophylla (Asteraceae) from the high altitude grasslands in the Itatiaia National Park, Rio de Janeiro, Southeast...

The special issue 7(Suppl.1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released: http://ncr-journal.bear-land.org/journal/39. This issue is entitled “Biodiversity Informatics for Protected Areas” by containing papers based on biodiversity data management methods and (or) methods for consolidated data...

The regular issue 7(1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/38. The cover shows the male Urothemis edwardsii (Selys, 1849) in the National Park of El Kala, Algeria (Author: Dr. Rassim Khelifa). This issue of the journal "Natur...

Over the last two decades, Cytauxzoon spp. has been conquering Eurasia, although this fact has only been brought to light through recent more intensive research after the discovery of C. manul in Pallas’ cat. In Europe, Cytauxzoon was detected mainly in southern countries and later in central Europe. This pathogen has now been found in Russia for t...

Inbreeding and low diversity in MHC genes are considered to have a negative effect on reproductive success in animals. This study presents an analysis of the number and body mass of offspring in domestic cat, depending on the inbreeding coefficient and the degree of similarity in MHC genes of class I and II in parents. Inbred partners had a lower n...

The regular issue 6(4) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/37. The cover shows the female wolf (Canis lupus Linnaeus, 1758) in the buffer zone of the Daursky State Nature Biosphere Reserve, Russia (Author: Sergey Vysotin). Th...

The regular issue 6(3) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/36. The cover shows two male Blood pheasants (Ithaginis cruentus Hardwicke, 1821) on the alpine rocky-cliffs of Khangchendzonga Biosphere Reserve (India) (Authors: Bi...

Since blood cells count is the most important indicator of animals’ physiological status, we investigated the effects of age, litter size, and multiple paternity on the total number of white blood cells, the number of their individual types (lymphocytes, neutrophils, eosinophils, monocytes), and the ratio of neutrophils to lymphocytes in domestic c...

The regular issue 6(2) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released. It is stored here: http://ncr-journal.bear-land.org/journal/35. The cover shows cubs of brown bear (Ursus arctos Linnaeus, 1867) feeding by sockeye salmon, South Kamchatka (Photo: PhD Sergey A. Kolchin). This issue of the jour...

The Russian Far East is a unique location that may be considered a hot spot of biodiversity in Russia. In 2010, a new illuminated highway for high-speed traffic was built on its territory. The aim of this study was to evaluate the impact of this highway on the distribution and activity of various mammalian species. We set up camera traps in five li...

The special issue 6(Suppl.1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released: http://ncr-journal.bear-land.org/journal/33. This issue is entitled "Protected Areas in the Green Belt of Fennoscandia" being devoted to the anniversary of the Kostomuksha State Nature Reserve. The cover shows the wild r...

Testosterone may affect many aspects of passerine maturation including the expression of plumage coloration and spring migration in adult birds. However, how the testosterone level changes during bird development is not well known. We compared the testosterone profile during juvenile development of a sexually dimorphic species, the Blackcap Sylvia...

The regular issue 6(1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/34. The cover shows Pelias kaznakovi (Nikolsky, 1909) in Sochi National Park (Russia) (Photo: Dr.Sc. Boris S. Tuniyev). This issue of the journal "Nature Conser...

Significance The decline and progressive fragmentation of many threatened populations increase extinction vulnerability due to outbreaks of infectious disease. Vaccination is one of the few tools available to mitigate these threats, but its use is often hampered by insufficient epidemiological understanding and historic controversies over endangere...

The ability of the polar bear (U. maritimus) to kill and consume conspecifics is accepted, but the reasons behind this behavior and its prevalence remain unclear. Here, we report 14 cases of intraspecific killing, cannibalism, and aggressive behaviors among polar bears observed in seven instances in the Barents Sea and the Kara Sea on Frans-Josef L...

This issue of the journal "Nature Conservation Research" contains articles devoted to varous taxonomic groups of plants and animals in Europe, Asia and Africa. It includes research articles devoted to study vascular plants, inveterbrates, mammals, and phenological observations of nature. Some insect groups (Diptera, Hymenoptera) were studied in Pro...

The special issue 5(Suppl.2) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released: http://ncr-journal.bear-land.org/journal/31. This issue is entitled "PARASITOLOGICAL STUDIES IN PROTECTED AREAS". The cover shows the brook Da Brout in the Cat Tien National Park, Vietnam (Photo: Irina I. Semenyuk, Russi...

The special issue 5(Suppl.1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released: http://ncr-journal.bear-land.org/journal/30. This issue is entitled as "ORCHID CONSERVATION". The cover shows Calypso bulbosa L. in spruce-pine forest with a dominant green moss layer (Leningrad region, Russia) (Photo: D...

This is the first study to show the genetic identity of the Altai-Sayan population of the forest reindeer of the Kuznetsk Alatau (Rangifer tarandus valentinae). The population is characterized by the existence of unique mitochondrial lines, the absence of signs of introgression of domestic rein deer mtDNA, as well as a low level of genetic diversit...

The total number of white blood cells (WBCs) is related the immune system. In mammals, it is affected by the body mass, but it is unclear how the numbers of different WBC types correlate with this parameter. We analyzed the effect of body mass on WBC number and ratio in felids, where species are similar in diet (warm-blood vertebrates) and reproduc...

Currently, government agencies are increasing interest in the conservation of wild ruminants which are either listed in the Red Book or kept in reserves and national parks. This type of ruminant includes dzeren, or Mongolian gazelle that lives on the territory of the Daursky State Nature Biosphere Reserve between the Tel and Utogi cordons. For purp...

Translocation of wildlife as a means of reintroducing or reinforcing threatened populations is an important conservation tool but carries health risks for the translocated animals and their progeny, as well as wildlife, domestic animals and humans in the release area. Disease risk analyses (DRA) are used to identify, prioritise and design mitigatio...

Lactation is the most energetically expensive component of maternal care in mammals. Increased reproductive investment can lead to physiological stress for the mothers, based on the exhaustion of energy resources and increase in glucocorticoids level. This study aimed to estimate the changes in cortisol concentrations during lactation in domestic c...

The development of industry and agriculture and the continuous growth of human population on Earth have dramatically increased anthropogenic pressure on natural ecosystems and wildlife. As a result, fragmentation of the natural habitats and the decrease in genetic diversity in these populations increase the probability of reproduction with genetica...

Results of monitoring, populational and toxicology researches of Gray, Bowhead and Beluga Whales in the western Bering Sea, conducted by Russian scientists in 2013-2019, is given.

Leukocytes (white blood cells) are an important part of the mammalian immune system preventing the invasion and colonisation by different pathogens. Many factors may affect the number of leukocytes in mammals, including the population density. The population density in the same species of felines may differ 100–300 times and the aim of this study w...

Vocal development of cranes (Gruidae) has attracted scientific interest due to its special stage, voice breaking. During voice breaking, chicks of different crane species produce calls with two fundamental frequencies that correspond to those in adult low-frequency and juvenile high-frequency vocalizations. However, triggers that affect voice break...

In many mammals, play is one of the most conspicuous behaviors during early development, but with notable inter‐individual variation even within the same litter. We investigated predictors of such variation in the Eurasian lynx (Lynx lynx), with a focus on potential effects of cubs' early body mass on the frequency of initiating play. We studied 45...

The first leopards were released into Caucasus nature in 2016 and 2018 as result of the first step of Federal leopard restoration program. They were equipped with GPS collars with satellite transmitters. The data obtained from the collars was used to create and verify a mathematical model of the potential habitats of this species and evaluate the p...

Social play in young mammals reflects behavioral development, play can be affected by differences in development timing and species biology. We compared social play frequency changes in three felids: Eurasian lynx (Lynx lynx), Amur subspecies of leopard cat (Far-Eastern wildcat) (Prionailurus bengalensis euptilurus) and domestic cat (Felis catus)....

Twice a year billions of birds migrate between breeding and wintering grounds. To facilitate migrations, birds develop migratory disposition, a complex suite of behavioral and physiological adjustments. Glucocorticoid hormone corticosterone is involved in the regulation of migratory behavior and physiology, however no consensus on its exact role in...

The regular issue 4(4) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/17. The cover shows Ursus arctos in the Central Forest State Nature Biosphere Reserve (Russia) (photo taken by a camera trap; provided by Sergey S. Ogurtsov). T...

The regular issue 4(3) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/16. The cover shows Cervus elaphus xanthopygus in the State Nature Reserve «Bolshekhekhtsirskiy» (Russia) (photo taken by a camera trap; provided by Dr. Rimma S...

The special issue 4(Suppl.1) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/24. This issue is entitled as "Wildfire management and wildfire impact on biodiversity in Protected Areas". The cover shows evidence of the wildfire in th...

This monograph provides a comprehensive review and analysis of the available literature on the monitoring of big cats. Special attention is paid to the most up-to-date methods based on recent advances in technology, resulting in useful tools to remotely and noninvasively study animals in natural habitats, essential when working with rare species. E...

Tigers continue to face unprecedented threats to their existence due to poaching, habitat loss, habitat fragmentation and anthropogenic disturbances. The present study examines the physiological stress response of tigers due to anthropogenic activities including wildlife tourism in Bandhavgarh Tiger Reserve and Kanha Tiger Reserve using faecal gluc...

The special issue 4(Suppl.2) of the journal "Nature Conservation Research" (http://ncr-journal.bear-land.org/) has been released today. It is stored here: http://ncr-journal.bear-land.org/journal/25. This issue is entitled as "Conservation of equid taxa". The cover shows Przewalski’s horses (Equus ferus przewalskii Poliakov, 1881) in the Pre-Urals...