Yurii Valentinov Kornilev

Yurii Valentinov Kornilev
National Museum of Natural History - Bulgarian Academy of Sciences · Herpetology, Vertebrates Department

M.S. University of Florida; B.S. Davidson College

About

58
Publications
26,283
Reads
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241
Citations
Citations since 2016
29 Research Items
173 Citations
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20162017201820192020202120220102030
Additional affiliations
July 2011 - October 2014
Bulgarian Society for the Protection of Birds
Position
  • Conservation officer
August 2006 - August 2008
University of Florida
Position
  • Research Assistant
August 2002 - December 2005
Davidson College
Position
  • Research Assistant
Education
August 2006 - August 2008
University of Florida
Field of study
  • Biology, Interdisciplinary Ecology
August 2001 - May 2005
Davidson College
Field of study
  • Biology

Publications

Publications (58)
Article
Full-text available
The widespread relationship between salt excreting structures (e.g., salt glands) and marine life strongly suggests that the ability to regulate salt balance has been crucial during the transition to marine life in tetrapods. Elevated natremia (plasma sodium) recorded in several marine snakes species suggests that the development of a tolerance tow...
Article
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A decreased tannin load during 2006–2007 in a northern Florida blackwater river allowed us to make observations on the ecology of the Suwannee cooter (Pseudemys concinna suwanniensis), a species otherwise usually studied in clear, spring-fed rivers. We conducted a capture–mark–recapture study of this protected species and recorded the locations of...
Article
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The advanced snakes (Alethinophidia) include the extant snakes with a highly evolved head morphology providing increased gape and jaw flexibility. Along with other physiological and morphological adaptations, this allows them to immobilize, ingest, and transport prey that may be disproportionately large or presents danger to the predator from bites...
Article
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The Snake-eyed Skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) is one of the smallest lizards in Europe, and this, combined with its secretive lifestyle, makes population studies on the species very difficult. Only a few studies concerning sparse data, mainly on the species' activity, have been published, but its population ecolo...
Article
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Since its appearance in pet stores in Bulgaria in the 1990s, the pond slider Trachemys scripta has been released at multiple localities across the country, but this process has been subject to limited scientific attention. Here, we update the distribution of this invasive alien species by adding 17 new squares to the previously published 30 of the...
Article
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Different snake species may be active at various times of the day. In Europe, most snake species are predominantly diurnal, but about a third are partially or principally crepuscular and/or nocturnal. Here, we report the first instance of multiple in situ observations of the crepuscular and nocturnal activity of V. ammodytes in Bulgaria. Overall, u...
Article
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Snakes rely heavily on chemical cues when foraging, searching for mates, etc. Snakes’ sex attractiveness pheromones comprise mainly heavy, semi-volatile compounds such as ketones. Here we investigated the composition of skin secretions of adult Vipera ammodytes (Linnaeus, 1758) individuals. The samples were analyzed by gas chromatography/mass spect...
Article
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We investigated the habitat selection of "mad" Western Capercaillies males from the isolated and threatened Rila-Rhodope population. These "mad" Capercaillies are highly territorially aggressive individuals, that approach and attack people; this abnormal behavior, rarely occurs beyond single individuals in one lek and no studies that we know of hav...
Article
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The Alpine newt Ichthyosaura alpestris is a glacial relict in Bulgaria, occurring only in several mountainous regions. Results of a long-term herpetological survey in Bulgaria are presented, including from sampling specifically targeting the aquatic phase of I. alpestris. The known ranges of its vertical and geographical distribution are now expand...
Article
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The amphibians and reptiles occurring in Balgarka Natural Park (NP), are a representative sample of the lowland and middle mountain range herpetofauna of the Stara Planina Mountains. Here we present the first detailed and targeted mapping for the NP. The data were collected mostly in 2012–2013, mainly based on visual searches using the transect met...
Conference Paper
Full-text available
In a recently published paper (Popgeorgiev et al. 2019), we compiled for the first time published and unpublished data on localities of the herpetofaunal species observed up to ca. 10 km south of the Bulgarian Danube River. Overall, we identified 687 published records belonging to 62 cells of the 10×10 km MGRS grid. Another 1918 records with real c...
Article
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Current habitat management of the peripheral, regionally unique, and isolated Balkan capercaillie Tetrao urogallus rudolfi Dombrowski, 1912 meta-population in Bulgaria is based on obsolete knowledge of the spatial requirements of the species. Thus, we studied the habitat availability and the patterns of use by Capercaillie adult males, at the home...
Conference Paper
Full-text available
During this preliminary study, 26 specimens from 8 different snake species were examined. Three methodologies for extraction of skin secretions by immersion of skin in n-hexane were used: immersing the whole body of live individuals for approximately 1 min in the field (n = 13), immersing the whole body of dead specimens (found freshly killed on ro...
Article
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The Snake-eyed Skink’s intra- and inter-specific interactions and their impacts on the individual (e.g. injuries) have received little attention so far. As part of copulation, male lizards bite the females; observations confirm an old report that bites occur in the fore side of the body, along with more recently published information about the back...
Article
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For the first time, we present five unpublished cases from Bulgaria of two widely-distributed lacertid species exhibiting melanism: the European Green Lizard Lacerta viridis and the Viviparous Lizard Zootoca vivipara.
Article
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The Veleka River in SE Bulgaria is amongst the northernmost localities of coexistence of Emys orbicularis and Mauremys rivulata, the two native freshwater turtles. This linear structure provides a rare opportunity to study whether the species separate across a seemingly similar habitat. In 2010–2014, we sampled by boat 5.5 km of the river near its...
Article
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The Fifth International Symposium on Emys orbicularis and the other European Freshwater Turtles was held in Kiten, Bulgaria, on 19–21 August 2015. It continued the tradition of international collaboration and exchange of knowledge related to the chelonians. The resultant proceedings combine 22 papers presented in the program of the symposium. They...
Article
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Although illegal wildlife trafficking is a global threat to biodiversity and a key reason for the decline of turtle populations, there are insufficient measures in place to combat it. Prompted by the recent seizure of over 1,300 European Pond Turtles in a single raid, experts on biology and conservation of chelonians discussed experiences on this a...
Article
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The two native freshwater turtles, the European Pond Turtle Emys orbicularis and the Balkan Terrapin Mauremys rivulata, are locally abundant and widespread in parts of Bulgaria. However, their distribution and ecological requirements still remain understudied. To ameliorate these issues, we present an up-to-date distribution, combining 1,833 unpubl...
Article
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A long-term conservation project has identified nest depredation as a major risk for the survival of the only native, reproducing population of the threatened European Pond Turtle in Austria in the Donau-Auen National Park floodplain. Thus, in 2005–2016, we utilized five designs of nest protection grids (NPGs) at the key nesting locations. Generall...
Article
Secondarily marine tetrapods have evolved adaptations to maintain their osmotic balance in a hyperosmotic environment. During the transition to a marine habitat, the evolution of a euryhaline physiology likely encompassed successive changes in behavior and physiology that released organisms from regular access to fresh water. Deciphering these key...
Article
Full-text available
In the present study, we investigated and documented the morphology of the male copulatory organs (hemipenes) in fifteen wide-ranging snake species. The species represent four families (Boidae, Colubridae, Lamprophiidae, and Viperidae) and ten genera. We applied the same preparation techniques for all species, successfully everting and expanding th...
Article
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Dice snakes (Natrix tessellata, Laurenti, 1768) inhabit oligohaline and brackish waters along the Bulgarian Black Sea coast, where they often forage at sea. Under these conditions, this species should tolerate highly variable blood plasma sodium concentrations for extended time periods, but the effect of high sodium concentrations to blood cell mor...
Article
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Published on The Orianne Society's website on 19 Jan 2017 (http://www.oriannesociety.org/blog/nose-horned-viper-vipera-ammodytes-montandoni-bulgaria ; currently unavailable there) as part of the Viper Specialist Group (VSG) Blog.
Book
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Настоящата публикация представя резултатите от България от Седмото международно преброяване на белия щъркел, проведено през 2014 – 2015 г. This publication presents the results from Bulgaria obtained as part of the 7th International White stork census carried in 2014–2015.
Chapter
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Sofia exhibits unique geographical characteristics as it is situated in lowland and bordered by mountains, including the high and relatively pristine Vitosha Mountain. Its location at the crossroads of trade and human migrations has established the city’s political and cultural importance for over 3000 years. The past 140 years have marked a signif...
Article
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The pygmy cormorant (Microcarbo pygmeus) has been increasing its population and since the 1980s has extended its wintering range to include the Balkans and Bulgaria. Although the Burgas wetlands on the southern Black Sea coast have been known to be used for wintering by the cormorants, their potential and importance seem to have been underestimated...
Article
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We investigated in the field the diet of the European otter (Lutra lutra) within “Strandzha” Natural Park, south-eastern Bulgaria, a region with limited data available. We utilized standard procedures (such as footprints tracking and inspecting the terrain for otter spraints) to detect the presence of otters and obtain food remains. A total of 204...
Article
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Pond sliders (Trachemys scripta) have become a popular pet in Bulgaria since 1990. Through the years a number of released specimens were observed in the wild. Although the negative effects on native turtles have been studied extensively elsewhere, no specific studies (besides brief reports) have addressed the invasion of T. scripta in Bulgaria. The...
Article
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We present the first comprehensive review of the diversity of the herpetofauna of the Natura 2000 site Ponor Special Protection Area. We compiled data from 22 publications covering 20 species and carried out multiple field visits between 1998–2012, recording 375 locations confirming all previously reported species and reporting four new species. Th...
Article
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The Natura 2000 network has been created across the European Union to enhance the conservation of biological diversity together with regional sustainable development. Although it covers 18% of the area of the 28 member states (Bulgaria being amongst the countries with the highest coverage, with 34.4%), there is still uncertainty about its long-term...
Article
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After 2007, the Bulgarian farmers have started benefiting from the newly available agro-environmental schemes through the European Union, which have promoted significant landscape changes. However, the impact on the local environment and the herpetofauna is yet to be determined. This has prompted us to undertake a comparative study on the changes i...
Book
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Description and evaluation of the most significant wetlands in Bulgaria is given, threats, conservation actions done and necessary conservation actions are presented.
Book
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Description and evaluation of the most significant wetlands in Bulgaria is given, threats, conservation actions done and necessary conservation actions are presented.
Book
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This National Action Plan for Conservation of Wetlands of High Significance in Bulgaria (2013–2022) was prepared according to the Terms of Reference approved with letter No 48-00-1503/26.11.2010 of the Minister of Environment and Water and in fulfilment of the national priorities in biodiversity protection. The territorial scope of the plan includ...
Article
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We conducted a mark-recapture study of the turtle assemblage inhabiting a 1.1 km reach of the Santa Fe River within River Rise Preserve State Park in northern Florida during drought conditions in 2006 and 2007. In 154 man-hours of snorkeling, we hand-captured eight species, including two Florida listed Species of Special Concern – the Suwannee Coot...
Article
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This is the first comprehensive study on the dice snake (Natrix tessellata) in Bulgaria. To assess its current distribution, we combined published data (n = 191) and unpublished observations (n = 188) collected between 1985 and 2008 and mapped 379 localities on a 10 × 10 km UTM grid. The species has wide distribution in Bulgaria, found in 22% of 10...
Article
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We present briefly the distribution of amphibians and reptiles in the Special Protected Area "Besaparski ridove" in southwestern Bulgaria, based on a 2×2 km UTM grid. Between 1998 and 2008, we identified 24 species, and failed to verify the literature data only for a fossorial boa, Eryx jaculus. We documented five new amphibian species for the regi...
Article
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The numerous fires during the past decade in the Eastern Rhodopes (southeastern Bulgaria) resulted in extensive loss of habitat for multiple species. In this study on the reptilian fauna found near Kolets village (Haskovo District, Bulgaria) we compared two adjacent territories during 2004–2006, a control and a recently burned. We found no effect o...

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