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Item

A record of the invasive Blue Crab Rathbun, 1896 (Arthropoda: Crustacea) in Black Sea waters near Cape Shabla, Bulgaria

(2025-05-12) Yordanov, Nelko; Nikolov, Galin; Petrova-Pavlova, Elitsa; Kalcheva, Silvia; Georgiev, Dian

The Black Sea is a closed brackish-water intercontinental sea, part of the Mediterranean basin, with which it is connected through the Bosporus Strait, the Sea of Marmara, and the Dardanelles Strait. Due to this connection, many organisms from the Mediterranean Sea migrated to the Black Sea. One of these migratory organisms is the invasive blue crab. In the present study, we report the occurrence of one male Callinectes sapidus Rathbun, 1896 (carapace length: 70.09 cm, width: 15.69 cm, weight: 166.9 g) caught during commercial fishing on 26 April 2024 Black Sea waters near Cape Shabla, Bulgaria. Additional monitoring activities should be undertaken in the Black Sea to clarify the possibility of reproduction and determine the reproductive season of blue crab.

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Comparative leaf epidermis and molecular analyses of Micromeria dalmatica Bentham and Clinopodium vulgare L. from Bulgaria

(Plovdiv University Press Paisii Hilendarski, 2025-05-08) Mladenova, Tsvetelina; Naimov, Samir; Apostolova, Elena; Stoyanov, Plamen; Mladenov, Rumen; Bivolarska, Anelia; Raycheva, Tsvetanka; Gyuzeleva, Donika; Pechanska, Adriana; Balabanova, Rada; Kuzdova, Demetra; Todorov, Krasimir

The volume and number of taxa within the genus Micromeria have changed over the past decades based on several molecular genetic studies. In the Bulgarian flora, no revision has been conducted, and the boundaries of the genus remain unclear. Molecular studies have shown that members of the section Pseudomelissa within the genus Micromeria are more closely related to the genus Clinopodium than to the typical section Micromeria. In the present study, anatomical investigations of the leaf epidermis were carried out, and the molecular genetic structure of Micromeria dalmatica was determined. Its phylogenetic relationship with Clinopodium vulgare was established based on sequences in the ITS1 and tRNA-Leu regions

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Cyprus Lizards: Patterns of distribution, endemic species habitat suitability modelling and conservation implications

(Plovdiv University Press Paisii Hilendarski, 2025-03-01) Svana, Kalina; Zotos, Savvas; Kiamos, Nikolaos; Lymberakis, Petros; Mylonas, Moisis

Considering the limited information on the distribution of Cyprus’ lizards, especially on endemic and endangered species, herein we explore their spatial patterns, with the aim of addressing this knowledge gap and contributing to informed conservation of the species as they face increasing pressure and threats. We recorded the eleven species present on the island, belonging to five families, of which two are endemic species (i.e. Laudakia cypriaca, Phoenicolacerta troodica) and four are endemic sub-species (i.e. Ablepharus budaki budaki, Acanthodactylus schreiberi schreiberi, Mediodactylus orientalis fitzingeri, Ophisops elegans schlueteri), including one listed as endangered by IUCN. We present new species occurrences and maps for all species, resulting from our extensive systematic survey in 2009. As a novelty, for the lizards and the island, we conducted species distribution modelling (SDM) for five endemic taxa. We used the maximum entropy algorithm (MaxEnt), with a combination of selected environmental predictors and userdefined parameter settings. We provide potential habitat suitability maps and investigate the role of environmental predictors influencing the possible species’ distribution. We conclude that temperature, precipitation and vegetation have the most important influence in predicting habitat suitability. We propose five subregions, as a general pattern of differing habitat suitability for lizard species on the island. We discuss the added value and conservation implications of new knowledge and datasets we provide.

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Second record of the Bulgarian local endemic Balea eninskoensis Irikov, 2006 (Mollusca: Gastropoda)

(Plovdiv University Press Paisii Hilendarski, 2025-04-24) Georgiev, Dilian

A new locality for the rare Bulgarian land snail Balea eninskoensis Irikov, 2006 is reported from the gorge below Buzludzha Monument, 42°41'31.0"N 25°22'45.5"E, 569 m a. s. l.

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First records of Apis mellifera Linnaeus (Insecta: Hymenoptera) open nests in Sofia, Bulgaria

(Plovdiv University Press Paisii Hilendarski, 2025-04-24) Todorov, Ivaylo; Grozdanov, Atanas

The presence of five feral, exposed nests of Western honey bee, Apis mellifera L., is reported for the first time from a populated area in Bulgaria. The survival success of the colony during the winter was observed for two of the nests. Possible reasons for this unusual nesting behavior are discussed.