Nedko Nedyalkov

Nedko Nedyalkov
National Museum of Natural History - Bulgarian Academy of Sciences · Paleontological museum - Asenovgrad

PhD

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46
Publications
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184
Citations

Publications

Publications (46)
Article
Full-text available
We report the changes in the distribution of three alien mammal species in Bulgaria, the coypu Myocastor coypus, the muskrat Ondatra zibethicus, and the raccoon dog Nyctereutes procyonoides after their entry into Bulgaria in the fifties and sixties of the last century. The data has been summarised from field surveys, reviews from scientific literat...
Article
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The Forest Dormouse, Dryomys nitedula , has a wide geographic distribution, from Switzerland in the west, through eastern and southern Europe, Asia Minor and the Caucasus, to central Russia, central Asia and Mongolia in the east. Previous phylogenetic studies revealed highly divergent lineages in some part of the distribution, suggesting that the h...
Article
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The Roach’s Mouse-tailed Dormouse ( Myomimus roachi , Bate 1937) is endemic to the Western Palearctic (occurring in SE Bulgaria, Turkish and Greek Thrace, and western Anatolia) and is one of the less known mammals within the region. There is no information about its biology and ecology in the wild. In the course of the past 3 years (2019-2021), we...
Article
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Here we summarize all available data about dormice (Gliridae) in Bulgaria, published one and our own observations, collected in the last 20 years. Four species are found in Bulgaria - the Forest Dormouse ( Dryomys nitedula ), the Edible Dormouse ( Glis glis ), the Hazel Dormouse ( Muscardinus avellanarius ) and the Roach’s Mouse-tailed Dormouse ( M...
Article
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The Forest Dormouse ( Dryomys nitedula ) is one of the most widespread species of the Gliridae family, occurring in the Eastern Mediterranean, Central Asia, Caucasus and the Arabian plateau. The populations are mostly threatened by the destruction of their forest habitats. Despite being considered as Least Concern by the International Union for Con...
Article
Full-text available
Citation: Demerdzhiev D, Boev Z, Dobrev D, Terziev N, Nedyalkov N, Stoychev S, Petrov T (2022) Diet of Eastern Imperial Eagle (Aquila heliaca) in Bulgaria: composition, distribution and variation. Biodiversity Data Abstract The Eastern Imperial Eagle (EIE) is a top predator exploiting different prey in different parts of its distribution. In this s...
Article
The penis of the recently described mole Talpa martinorum and its relative, the European mole Talpa europaea, are described and compared. Considerable differences in the morphology of the glans penis were found: the apical part is narrow and rod-like in T. martinorum and conical in T. europaea; the keratinous papillae covering the basal part of the...
Poster
Full-text available
During a research of the biodiversity of Sarnena Sredna Gora Mts during 2018–2020, the ecological characteristics of the habitats of several model groups of animals were studied: earthworms (Oligochaeta: Lumbricidae), earwigs (Insecta: Dermaptera), cockroaches (Blatoptera), groung beetles (Carabidae), ants (Formicidae), amphibians (Amphibia: Caudat...
Article
The Srebarna lake, near the Danube River, Bulgaria, is a key site for biodiversity, specifically for ornithofauna. Thus, it has been designated as a managed nature reserve, a biosphere reserve, a Ramsar site, an Important Bird Area and Natura 2000 sites. Srebarna (and recently Persina Island) hosts the only breeding colonies of the Dalmatian pelica...
Article
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We contribute new data about distribution of 10 small mammal species in North Macedonia. For the first time wе recorded the presence of two brown-toothed shrews in еastern Macedonia – Sorex araneus and S. minutus. We documented the highest known observation in Europe for Microtus hartingi – from about 1000 m a.s.l. We provide new records of Glis gl...
Article
Cricetus cricetus (Linnaeus, 1758) is a medium-sized cricetid commonly called the common hamster. A sexually dimor-phic rodent of unique coloration with robust body, blunt head, short legs, and rudimentary tail, it is the largest hamster and the only species in the genus Cricetus. It is easily recognizable by a color pattern of contrasting dark and...
Poster
Full-text available
RESULTS In 18 karyologicaly exanimated voles we found karyotype containing 23 chromosomal pairs (2n=46), with a typical number and chromosome morphology to Microtus arvalis. The voles come from the following localities-Trigrad (Rhodope mountain), Zlatna niva, Pliska, Imrenchevo (Shumen district), Totleben, Balgarene, Kozar Belene, Slavyanovo (Pleve...
Article
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Grey voles (subgenus Microtus ), widespread in Eurasia, may be important pests and could cause serious damage to agricultural grain fields. In Bulgaria two morphologically similar species are present ( Microtus arvalis Pallas, 1778 and M . rossiaemeridionalis Ognev 1924) , which are impossible to identify in the field. Despite their importance as p...
Article
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Myomimus roachi is one of the rarest and least studied mammals of the Western Palearctic. It is rare and sparsely distributed in the Southeastern Balkans and Western Anatolia. After its initial finding in 1959, the species was recorded only sporadically After its initial finding in 1959, the species was recorded only sporadically. All available dat...
Article
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We utilized 1084 bp sequences of the cytochrome b gene to assess the taxonomic status of small blind moles from eastern Thrace in Bulgaria and European Turkey. So far, these moles were classified either as Talpa caeca or as T. levantis. Our study showed them to be genetically closer to T. europaea, T. aquitania, and T. occidentalis, albeit not bein...
Article
Full-text available
We utilized 1084 bp sequences of the cytochrome b gene to assess the taxonomic status of small blind moles from eastern Thrace in Bulgaria and European Turkey. So far, these moles were classified either as Talpa caeca or as T. Levantis. Our study showed them to be genetically closer to T. Europaea, T. Aquitania, and T. Occidentalis, albeit not bein...
Article
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Data are presented on the diet of Barn Owl and Taw ny Owl in central A natolia, Turkey. D iet of the two species differed in type and num ber of prey species. The predom inant prey w ere small m am m als, com prising up to 96.9% of the Barn O w l's diet, as voles M icrotus spp and house mice M us sp, together representing 76.3%. The Taw ny Owl util...
Article
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Data are presented on the diet of Barn Owl and Tawny Owl in central Anatolia, Turkey. Diet of the two species differed in type and number of prey species. The predominant prey were small mammals, comprising up to 96.9% of the Barn Owl's diet, as voles Microtus spp and house mice Mus sp, together representing 76.3%. The Tawny Owl utilized more diver...
Article
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During the last decade I collected extensive new information about the distribution of the Grey hamster (Cricetulus migratorius) in Bulgaria, mainly through the study of pellets of birds of prey and owls. New data about the dental morphology and morphometrics, distribution, and current status of the Grey hamster in Bulgaria are presented. The Grey...
Article
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A review on the composition of the small mammals in Vrachanska Planina Mts. was completed using published and author's data. A total of 27 species occur within the territory. All of the species found are typical for the region. The species with the highest conservation status, the European ground squirrel Spermophilus citellus, disappeared from the...
Poster
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Here we provide information about the current status of two hamster species, C. cricetus and M. newtoni, in Bulgaria.
Article
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During field surveys for small mammals in Bulgaria we found specimens of Crocidura leucodon, Talpa europaea and a Mus sp with color variation. We reviewed the national scientific collections and the available literature for cases of small mammals with color variations. Color variation in small mammals is very rare, so far we found nine cases onl...
Article
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We present results from a study on the diet of Saker falcon (n = 15 nests) and Eastern imperial eagle (n = 2 nests) from south Kazakhstan, on the basis of food remains and pellets collected during the 2009 breeding season. The main prey for Saker falcon was predominantly rodents living in middle-size colonies – Spermophilus erytrogenys and Rhombomy...
Article
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Twenty-five species of small mammals were registered in the Besaparski Ridove Special Protection Area: Erinaceomorpha (1 species), Soricomorpha (5 species), Lagomorpha (1 species) and Rodentia (17 species). Species composition and distribution were studied by observing the traces left after the life activity as well as by using pitfall traps, live...
Technical Report
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Методика за мониторинг на Добруджански хомяк (Mesocricetus newtoni) е разработена в рамките на преокт "I фаза" Договор № 2597/22.07.2013 г. "Теренни проучвания на разпространение и численост на бозайници (без китоподобни)" http://eea.government.bg/bg/bio/opos/activities-results/Mesocricetusnewtoni_MetodikazaMonitoring.pdf
Technical Report
Full-text available
Методика за оценка състоянието на Обикновен хомяк (Cricetus cricetus Linnaeus, 1758) е изработена по проект I фаза" Договор № 2597/22.07.2013 г. "Теренни проучвания на разпространение и численост на бозайници (без китоподобни)"
Technical Report
Full-text available
Методиката за оценка на състоянието на добруджанския хомяк е изготвена по проект Проект "Теренни проучвания на разпространение на видове / оценка на състоянието на видове и хабитати на територията на цялата страна – I фаза" Договор № 2597/22.07.2013 г. „Теренни проучвания на разпространение и численост на бозайници (без китоподобни)“
Article
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Article
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New records of three rare rodent species from SE Bulgaria are reported, as follows: European Snow Vole (Chionomys nivalis) – Madzharovo Town, Eastern Rhodope Mountains (UTM MG01); Gray Dwarf Hamster (Cricetulus migratorius) –Matochina Village (UTM MG 63); and Roach's Mouse-tailed Dormouse (Myomimus roachi) –Malki Voden Village, Eastern Rhodope Moun...
Article
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The study explores the mortality of birds, amphibians, reptiles and mammals causes of traffic on Trakia highway (the section is 68 km long) and one control road section: first-class road (the section is 58 km long) between Pazardzhik and Plovdiv. To observe the number of killed amphibians, reptiles, birds and mammals on the highway 11 one-kilomet...
Article
Full-text available
The study explores the mortality of birds, amphibians, reptiles and mammals causes of traffic on Trakia highway (the section is 68 km long) and one control road section: first-class road (the section is 58 km long) between Pazardzhik and Plovdiv. To observe the number of killed amphibians, reptiles, birds and mammals on the highway 11 one-kilometer...
Article
Full-text available
The Saker Falcon Falco cherrug breeds in Turkey and also occurs in the country during passage and in winter. Turkey represents the southwestern range limit of the global breeding distribution of the species and is relatively isolated from the neighbouring population centres in Europe and Central Asia. A review of literature and other record sources...
Article
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Bird mortality on 20 W power lines was reported in four IBAs in Southern Bulgaria. In the period between September-December 2004, 139.3 km of power lines and a total of 1418 electric poles of different designs were monitored. As a result, 105 bird carcasses representing 22 species were detected. Electrocution was suspected for 77.1% (n=81) of the d...
Article
Full-text available
The current article presents data on the wintering colony of Noctule bats at a river bridge in the town of Plovdiv, Bulgaria. The data were obtained during a rescue operation aimed at saving the wintering colony threatened by repair works on the Gerdzhika bridge over the maritza river in the centre of Plovdiv. The operation was carried out during t...

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Projects (5)
Project
We aim to reveal, for the first time, the evolutionary relationships between all major forms of BMR using DNA samples from Anatolia, Levant, North Africa, the Balkans, Eastern Europe and Caucasus. We will use ddRAD-seq to construct a robust, time-calibrated phylogeny of all species and all major cytogenetic forms of Spalax and Nannospalax, and will complement these results with phylogeny based on partial mtDNA sequences. Using combined nuclear and mtDNA data, we will be able to infer the timing of the major divergence events in the evolutionary history of BMR, and will reveal whether there is ongoing hybridization between different populations.
Project
Phylogeography and evolutionary history of Dryomys nitedula throughout its distribution and local population genomic analyses of the bulgarian population. We are also interested to the genera Dryomys as well. Our goal is to involve many collaborators from all its distribution and present the results at the next dormice conference in 2021 in Bulgaria. Feel free to reach us!
Project
Mapping, study of conservation status of Common (Cricetus cricetus) and Romanian hamster (Mesocricetus newtoni) in Bulgaria.