Dilian Georgiev

Plovdiv University

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Peter Glöer

Institute for Biodiversity

Slaveya Stoycheva

Ivaylo Dedov

Institute of Biodiversity and Ecosystem Research

Ulrich E. Schneppat

Bündner Kunstmuseum

Evgeniy Raichev

Trakia University

Ivelin A. Mollov

Plovdiv University

Stanimira Deleva

Bulgarian Academy of Sciences

Stanislava Peeva

Trakia University

AМ

A. М. Ostrovsky

Gomel State Medical University

D. Kostov

Trakia University

Cooperative Institutions

Bulgarian Academy of Sciences

Institute of Biodiversity and Ecosystem Research

Plovdiv University

National Museum of Natural History

Universidade de Vigo

Trakia University

Universidade do Porto

Sofia University "St. Kliment Ohridski"

Jagiellonian University

Russian Academy of Sciences

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Some new records of Diptera species from Sarnena Gora Mts

DOAJ (DOAJ: Directory of Open Access Journals) (2021)

Libor Dvořák Ulrich E. Schneppat Dilian Georgiev Katerina Dvořáková

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Infestation of the road-killed Eastern European hedgehogs (Erinaceus roumanicus) with Ixodidae ticks in some parts of Upper Thracian Plain (Bulgaria)

DOAJ (DOAJ: Directory of Open Access Journals) (2022)

A. Arnaudov Atanas M. Mikov Dilian Georgiev

Erinaceus

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Cyclopsocus hyalinus Thornton & Smithers, 1984 – a new record of barkfly (Psocodea: Psocomorpha: Calopsocidae) for continental Asia

Zenodo (CERN European Organization for Nuclear Research) (2023)

Dilian Georgiev A. М. Ostrovsky Roland Dobosz

10.5281/zenodo.8385288

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Identification key of the Rissooidea (Mollusca: Gastropoda) from Bulgaria with a description of six new species and one new genus

Dilian Georgiev Peter Glöer

New investigations of freshwater habitats in mountainous regions and caves revealed six new species of the Rissooidea in Bulgaria. The new species are described here and photos of the holotypes are provided. In addition we added photos of the type localities. An identification key of the genera of the Rissooidea of Bulgaria gives an overview of the diversity of this group. The following species are described as new: Strandzhia bythinellopenia sp. n., gen. n., Grossuana slavyanica n. sp., G. derventica n. sp., Radomaniola strandzhica n. sp., Bythiospeum devetakium n. sp., Bythinella rilaensis n. sp.

Identification key

Identification

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Psyllipsocus ramburii Selys-Longchamps, 1872 (Insecta: Psocoptera) from Andaka Cave -- first record of the species from Bulgaria

Zenodo (CERN European Organization for Nuclear Research) (2016)

Dilian Georgiev

Psocoptera

10.5281/zenodo.4043931

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A new species of Microstygia Georgiev et Glöer, 2015 (Gastropoda: Hydrobiidae) from Bulgaria

Historia naturalis bulgarica (2022)

Dilian Georgiev

The second known species of the genus Microstygia Georgiev et Glöer, 2015 was described, Microstygia lakatnika n. sp. It was found as empty shells in the deposits of the temporary stream of the Temnata Dupka Cave, Iskar River Gorge, Stara Planina Mts in Bulgaria. M. lakatnika n. sp. is a little bit larger and has one more whorl than the type species of the genus, M. deltchevi Georgiev et Glöer, 2015.

Whorl (mollusc)

10.48027/hnb.44.104

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OTTER (LUTRA LUTRA L.) MORTALITIES IN SOUTHERN BULGARIA: A CASE STUDY

Dilian Georgiev

Otter mortalities (n = 50) from Southern Bulgaria were analyzed. Among the mortality types, poaching was the most common cause of death recorded in this study (52% of all mortalities recorded), followed by road kill (10%) and drowning (8%). Killing of otters by dogs had the lowest impact (6%). Most of the otter mortalities (40%) came from areas with fish-farming activities - micro-dams and fishponds. In the second place were the regions of the large dams with 18% of all otter mortalities. The other locations provided lesser numbers of otter deaths.

Lutra

Poaching

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Original Contribution HUNTERS' ATTITUDE TO SOME PROTECTED MAMMALS AND BIRDS IN BULGARIA

Evgeniy Raichev Dilian Georgiev Stara Zagora

Hunters appear to be the connection between law and wildlife. The aim of the study was to reveal how hunters approach their duties and responsibilities concerning protection of mammals and birds. Questionary survey was carried out on 124 hunters, members of “Hunters and anglers societies” in the towns of Varna, Stara Zagora and Plovdiv. Our survey concern: buzzard (Buteo buteo), longlegged buzzard (B. rufinus), rough-legged buzzard (B. lagopus), goshawk (Accipiter gentilis), eagles (Aquila spp), Hrriers (Circus spp.), Falcons (Falco spp.), geese - Anser erythropus, A. faballis, A. anser, Branta ruficollis, cormorants - Phalacrocorax carbo and Halietor pygmeus, great white egret (Egretta alba), little egret (E. garzetta), purple heron (Ardea purpurea), grey heron (A. cinenea), otter (Lutra lutra), weasel (Mustela nivalis), badger (Meles meles), roe deer (Capreolus capreolus). Mainly otter, badger, herons and cormorants are the objects of illegal hunt. The following reasons for breaking the law were found: incorrect idea of a species place in the ecosystem; misunderstanding of the animal behavior reactions and believing in prejudices, and beliefs about some of the species; emotions outweigh the law and sometimes feeling of impunity. Great number protected mammals and birds as well as some others, which are under special hunting restrictions are objects of poaching.

Buzzard

Meles

Poaching

Accipiter

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Invasive Alien Species of Benthic Macroinvertebrates and Fish in the Bulgarian Sector of the Danube River—Results of the Joint Danube Survey 4 (JDS4)

Water (2022)

Teodora Trichkova Milcho Todorov Marian Kenderov Zdravko Hubenov Ivan Botev

The aim of this study was to assess the status of aquatic invasive alien species (IAS) in the shoreline zone of the Bulgarian sector of the Danube River, Danube tributaries, and adjacent standing water bodies in the frame of the Joint Danube Survey 4 (JDS4). Seven benthic macroinvertebrates and seven fish IAS were identified. The crayfish Faxonius limosus was frequently found and abundant in the tributaries. The mussels Corbicula fluminea, Dreissena rostriformis bugensis, and Sinanodonta woodiana dominated in the Danube River and the middle and lower reaches of the tributaries, while the fish Carassius gibelio, Perccottus glenii, and Lepomis gibbosus were most abundant in the standing water bodies. The integrated biocontamination estimated by taxonomic groups (crayfish, molluscs, and fish), sampling methods, and type of water bodies ranged from moderate in the shoreline zone of the Danube River, through moderate to high in the canals and lakes, to severe in the Danube tributaries and the reservoirs. The results demonstrate the importance of IAS in the assessment of the ecological status/potential of the water bodies in the DRB. The comprehensive evaluation of the aquatic IAS pressure will provide valuable information and support for the implementation of the national and EU IAS and water policies in the DRB.

Corbicula fluminea

Dreissena

Lepomis

10.3390/w14152299

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A record of Bythinella cf. opaca (Gallenstein 1848) (Gastropoda: Prosobranchia: Hydrobiidae) in Bulgaria

Zenodo (CERN European Organization for Nuclear Research) (2008)

Dilian Georgiev Slaveya Stoycheva

Prosobranchia

10.5281/zenodo.3996498

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