Mykola Drohvalenko

V. N. Karazin Kharkiv National University · Department of Zoology and Animal Ecology

Pelophylax esculentus complex hemiclonal systems are a unique evolutionary object due to intricate mechanisms of their sustainability at genomic, gamete, and developmental levels. Chornobyl Exclusion Zone (Ukraine) presents a no less unique object of nature evolution under the unprecedented radiation impact and human pressure decrease. By measuring...

Pelophylax esculentus is an interspecies hybrid of marsh frog P. ridibundus and pool frog P. lessonae. The hybrids are usually presented by diploid and triploid forms, and coexist and crossbreed with one or both parental species in the hemiclonal population systems (HPS). Siverskyi Donets river basin is known for its diversity of HPS and was descri...

Complicated relationships between different forms of Pelophylax esculentus complex are strongly connected to their reproduction modes. Stability of the hemiclonal population systems including variety of hybrids is provided by balance between gamete production patterns and selective death of offspring portion. A direct way to study such mechanisms i...

Pelophylax esculentus is an interspecies hybrid of marsh frog P. ridibundus and pool frog P. lessonae. The hybrids are usually presented by diploid and triploid forms, and coexist and crossbreed with one or both parental species in the hemiclonal population systems (HPS). Siverskyi Donets river basin is known for its diversity of HPS and was descri...

Complicated relationships between different forms of Pelophylax esculentus complex are strongly connected to their reproduction modes. Stability of the hemiclonal population systems including variety of hybrids is provided by balance between gamete production patterns and selective death of offspring portion. A direct way to study such mechanisms i...

A part of the COI mitochondrial barcoding gene was sequenced from seven species of different taxonomical groups: Ambystoma mexicanum (Amphibia, Ambystomatidae), Darevskia lindholmi, Lacerta agilis exigua (Reptilia, Lacertidae), Erinaceus roumanicus ( Mammalia, Erinaceidae ), Macrobiotus sp. 1 and 2 (Eutardigrada, Macrobiotidae) and Cameraria ohride...

We studied composition of Pelophylax esculentus complex representatives from Iskiv pond (81 adult frogs, 7 tadpoles). We estimated ratio of triploid P. esculentus (using erythrocyte cytometry and karyological analysis) and sex proportion (by outer and inner morphological features). Adults were presented only by hybrids and only 2 of them were femal...