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  1. Article ; Online: Notes on the defensive behavior and activity of Ablepharus kitaibelii (Bibron & Bory de SaintVincent, 1833) in Bulgaria

    VLADISLAV VERGILOV

    ZooNotes, Vol 116, Iss -, Pp 1-

    2017  Volume 4

    Abstract: The defensive behavior of the Snake-eyed skink is reported for the first time. It includes different strategies as hiding, spiral winding of the body, moving the tail in a wormlike manner, detaching the tail and limbs, thanatosis and even biting. Data on ...

    Abstract The defensive behavior of the Snake-eyed skink is reported for the first time. It includes different strategies as hiding, spiral winding of the body, moving the tail in a wormlike manner, detaching the tail and limbs, thanatosis and even biting. Data on the observed activities of the species in the wild are also provided.
    Keywords skink ; tail ; thanatosis ; Zoology ; QL1-991
    Language Bulgarian
    Publishing date 2017-10-01T00:00:00Z
    Publisher Plovdiv University
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Giant pelobatid fossil larva from the middle Miocene of Bulgaria

    Vladislav Vergilov / Nikolay Tzankov

    Historia naturalis bulgarica, Vol 43, Iss 3, Pp 29-

    2021  Volume 42

    Abstract: So far, in Bulgaria several fossils of extinct anuran species have been found, but all seem doubtful. Only two pelobatid remains have been found from the Balkans and the regions - younger species (Late Pleistocene) of the genus Pelobates from Serbia and ... ...

    Abstract So far, in Bulgaria several fossils of extinct anuran species have been found, but all seem doubtful. Only two pelobatid remains have been found from the Balkans and the regions - younger species (Late Pleistocene) of the genus Pelobates from Serbia and Miocene Pelobates sp. from Turkey. The fossil in the current study represents a larva of the genus Eopelobates, the first discovery of this genus not only for Bulgaria but for the Balkans as well. This pelobatid larva is gigantic, more than 200 mm in total length. The fossil is found in a diatomitian complex from the middle Miocene.
    Keywords development ; extinct ; eopelobates ; frontoparietal complex ; gigantism ; skeleton ; Science ; Q
    Language English
    Publishing date 2021-10-01T00:00:00Z
    Publisher Bulgarian Academy of Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: A case of Emys orbicularis (L.) feeding on newts from Bulgaria

    Vladislav Vergilov / Angel Dyugmedzhiev / Sylvia Georgieva / Miroslav Slavchev

    Historia naturalis bulgarica, Vol 43, Iss 2, Pp 25-

    2021  Volume 27

    Abstract: Different amphibians and amphibian larvae were already observed and described as part of the diet of the European pond turtle. Few studies report body parts from adult newts in the stomach content of Emys orbicularis (Linnaeus, 1758) or newts predated by ...

    Abstract Different amphibians and amphibian larvae were already observed and described as part of the diet of the European pond turtle. Few studies report body parts from adult newts in the stomach content of Emys orbicularis (Linnaeus, 1758) or newts predated by the same pond turtle species. We observed remains of Triturus dobrogicus (Kiritzescu, 1903) and Trituris ivanbureschi Arntzen & Wielstra, 2013 eaten by E. orbicularis inside funnel traps, which strongly suggests, that newts are part of the diet, although not typical and often eaten food by this pond turtle.
    Keywords feeding ; pond turtle ; predation ; protected area ; traps ; triturus ; Science ; Q
    Language English
    Publishing date 2021-09-01T00:00:00Z
    Publisher Bulgarian Academy of Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Injuries reflecting intra- and interspecific interactions in the Snake-eyed Skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) (Squamata, Scincidae) from Bulgaria

    Vladislav Vergilov / Yurii V. Kornilev

    Herpetozoa, Vol 32, Iss , Pp 171-

    2019  Volume 175

    Abstract: 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 ... ...

    Abstract 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 side. Additionally, out of 435 individuals observed in situ, 10 had missing extremities (toes, ankles, etc.); however, further studies should identify the causes of such injury, e.g. male-male combat, predators. For the first time, an adult male was observed biting a juvenile ex situ; the specific reasons, however, remain unknown. This report should generate further interest in ecological and behavioral studies, assessing the costs and benefits to potential territorial defense, intra-specific combat, and predator pressure and escape mechanisms.
    Keywords Zoology ; QL1-991
    Subject code 590
    Language English
    Publishing date 2019-08-01T00:00:00Z
    Publisher Pensoft Publishers
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: First 3-D reconstruction of copulation in Lepidoptera

    Boyan Zlatkov / Vladislav Vergilov / José Vicente Pérez Santa-Rita / Joaquín Baixeras

    Frontiers in Zoology, Vol 20, Iss 1, Pp 1-

    interaction of genitalia in Tortrix viridana (Tortricidae)

    2023  Volume 21

    Abstract: Abstract Background The process of copulation in Lepidoptera is understudied and poorly understood from a functional perspective. The purpose of the present paper is to study the interaction of the male and female genitalia of Tortrix viridana Linnaeus, ... ...

    Abstract Abstract Background The process of copulation in Lepidoptera is understudied and poorly understood from a functional perspective. The purpose of the present paper is to study the interaction of the male and female genitalia of Tortrix viridana Linnaeus, 1758 via three-dimensional models of pairs fixed during copulation. Other techniques (confocal laser scanning microscopy, scanning electron microscopy and histology) were used to clarify the role of the organs involved in the process. Results Three-dimensional models based on micro-CT scanned copulating pairs were generated allowing visualisation of the position of the male and female counterparts, spatial changes during copulation, and the skeleto-muscular apparatus involved in the process. The male genitalia and their musculature are simplified in comparison with other lineages of the family, but the opposite is true for the female genitalia. The attachment of the couple is achieved only through flexion of the valvae, clasping the large and sclerotised sternite 7 of the female. The anal cone and socii of the male are in contact with certain parts of the anal papillae and the sterigma of the female. The long tubular vesica is inserted into the narrow posterior part of the ductus bursae. Its eversion is achieved by an increase in haemolymph pressure. A possible mechanism of stimulation of the female via pulsations of the diverticulum of the vesica was discovered. A compressed sclerotised area of the ductus bursae putatively serves as a valve controlling the transfer of ejaculated materials. Copulation progresses through two phases: in the first the vesica and its diverticulum are inflated by haemolymph, and in the second the diverticulum is not inflated, and the vesica is occupied by viscous ejaculated material. The formation of the multilayered spermatophore was observed, and we discovered that sperm is transferred very late in the copulation process. Conclusions Copulation process in Lepidoptera is studied for the first time with three-dimensional ...
    Keywords Green oak leafroller ; Genitalia ; Functional morphology ; Micro-CT ; CLSM ; SEM ; Zoology ; QL1-991
    Subject code 590
    Language English
    Publishing date 2023-07-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: New records of Hierodula transcaucasica Brunner von Wattenwyl, 1878 (Mantodea) from Bulgaria

    Boyan Zlatkov / Stanislav Stefanov / Victor Gashtarov / Vladislav Vergilov

    Historia naturalis bulgarica, Vol 41, Pp 99-

    2020  Volume 101

    Abstract: New localities of Hierodula transcaucasica Brunner von Wattenwyl, 1878 from Bulgaria and illustrations of the species are provided. ...

    Abstract New localities of Hierodula transcaucasica Brunner von Wattenwyl, 1878 from Bulgaria and illustrations of the species are provided.
    Keywords distribution ; invasive insect ; mantodea ; Science ; Q
    Language English
    Publishing date 2020-11-01T00:00:00Z
    Publisher Bulgarian Academy of Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: Heavy metals in bones from Harbour Porpoises Phocoena phocoena from the Western Black Sea Coast

    VIOLETA EVTIMOVA / DIMITAR PARVANOV / ATANAS GROZDANOV / FERIHA TSERKOVA / BOYAN ZLATKOV / VLADISLAV VERGILOV / OGNYAN SIVILOV / STOYAN YORDANOV / VENTSESLAV DELOV

    ZooNotes, Vol 136, Iss -, Pp 1-

    2019  Volume 4

    Abstract: During the last few years, the Western Black Sea coast has documented increase in the number of stranded marine mammals, particularly the harbour porpoise (Phocoena phocoena). This species is a subject to threats such as exposure to contaminants, fishery ...

    Abstract During the last few years, the Western Black Sea coast has documented increase in the number of stranded marine mammals, particularly the harbour porpoise (Phocoena phocoena). This species is a subject to threats such as exposure to contaminants, fishery by-catch and introduced new marine species. The aim of this study was to analyse spatial and age trends in bone metal concentration in harbour porpoises from the Western Black Sea Coast. Selected heavy metals (Cu, Pb, Zn, Cd and Ni) were measured in bones of 33 harbour porpoises stranded along the Bulgarian Black Sea Coast from 2017. Spatially, we found higher metal levels in the harbour porpoises stranded in the Northern region compared with those from Southern region. The effect of aging was evident only for Zn content – the levels were higher in juveniles than in adults. The obtained results suggested that heavy metal contamination represent an important threat encountered by harbour porpoises.
    Keywords Zoology ; QL1-991
    Subject code 333
    Language Bulgarian
    Publishing date 2019-01-01T00:00:00Z
    Publisher Plovdiv University
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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