The article presents the original findings of Paracoenogonimus ovatus (Katsurada,1914) in fish in the Southern Bug and the Inhul rivers in Mykolaiv Region in 2012-2014. The roach (Rutilus rutilus), silver bream (Blicca bjoerkna), bream (Abramis brama), crucian (Carassius gibelio), rudd (Scardinius erythrophthalmus), pike (Esox lucius), pikeperch (Sander lucioperca) were found to be infected with metacercariae of P. ovatus. Metacercariae of P. ovatus are described based on the original material. The highest prevalence of infection was observed in the roach, 82.3 %, the pike was infected in the less degree, with prevalence of 15.3 %. The infection intensity was highest in the roach, up to 247 specimens; that of the pikeperch was the lowest - 17 specimens. The highest occurrence of P. ovatus was observed in the parts of the river Southern Bug in Zhovtnevy, Mykolaiv, Novoodesky Districts, whereas in Voznesenky, Pervomaysky Discticts and in the city of Mykolaiv the occurrence was the lowest. In the area of the river Inhul the parasite was observed mostly in the waters of Bashtansky District in Mykolaiv Region.
geographical zones ( 10 , 16 , 19 ). Kharkiv oblast is located in forest-steppe and steppe areas and Dnipropetrovsk and Mykolaiv oblasts are true steppe areas. Their favourable biotopes for rodent habitation are mostly similar: upland deciduous forests and pinewood terraces are typical for the woody parts of Kharkiv oblast and floodplains, fields, shelterbelts and ravine forests are typical for all three oblasts. The dominant species of rodents here are Myodes glareolus , Sylvaemus tauricus , Sylvaemus sylvaticus , and Sylvaemus uralensis . The natural foci of
The article describes occurrence and distribution of Cryptocotyle trematodes in fish in the waters of the Dnipro-Buh estuary and the Black Sea in Mykolaiv and Odesa Region. Study was conducted in 2015-2016. Two trematode species were found in natural waters of these regions: Cryptocotyle cancavum Crepli, 1825 and Cryptocotyle jejuna Nicoll, 1907. Th e latter species has not been previously registered in this region in southern Ukraine. Varying intensity of infection with Cryptocotyle metacercariae was observed in fish of Gobiidae family: Mesogobius batrachocephalus Pallas, 1814, Neogobius melanostomum Pallas, 1814, N. fluviatialis Pallas, 1814. Th e most affected species was N. melanostomum, with the prevalence of infection 59.2 %. Less infected were N. fluviatialis and M. batrachocephalus, with the prevalence of infection 30.4 % and 17 % respectively. The intensity of infection was the highest in N. melanostomum - 211 metacercariae per fish, followed by N. fluviatialis and M. batrachocephalu - 124 and 89 metacercariae respectively. Cryptocotyle was the most prevalent in the Dnipro-Buh estuary (cape Adzhigol, Mykolaiv Region) and much less prevalent in the waters of the Black Sea in Mykolaiv and Odesa Regions. Mean prevalence of infection was 31.4 %.
The analysis of historical data on the the bobak marmot distribution and failed attempts to reacclimatize the species in the right-bank Ukraine are presented. The article also informs about finding in Mykolaiv Region a colony of the the bobak marmot which history dates back to 1988.
The article describes occurrence and distribution of Eustrongylides trematodes in fish in the waters of the Dnipro-Buh estuary and the delta of Dnipro River in Mykolaiv and Kherson Region. Study was conducted in 2015–2016. This parasite was found in natural water reservoirs in Mykolaiv and Kherson region in following fish species: Sander lucioperca (Linnaeus, 1758), Perca fluviatilis (Linnaeus, 1758) and Esox lucius (Linnaeus, 1758). Ichtyopathological investigation of 346 fishes was conducted. Parasites were observed in abdominal cavity, muscle tissue, wall of gastro-intestinal tract, gonads and hepatopancreas. P. fluviatilis was the most affected species, prevalence of infection was 85.1 %. Less infected were S. lucioperca and E. lucius, with the prevalence of infection 58.1 % and 58.9 % respectively. Mean prevalence of infection of predatory fish in studied reservoirs was 70.5 %. The intensity of infection was the highest in perch (1–14 nematodes per fish). The lowest intensity of infection was found in pike-perch (1–9 nematodes per fish).
Mantis Religiosa (Dyctioptera, Mantidae) Infected by Wolbachia
For the first time, endosymbiotic bacteria of the genus Wolbachia were found to infect soothsayers, Mantis religiosa (Linnaeus, 1758). Mantises were collected at two locations in vicinity of Mykolaiv and Kaniv, Ukraine. Tested individuals were not infected by Cardinium and Spiroplasma.
Three new species of mesostigmatic mites from Ukraine are described: Gaeolaelaps heteroceri Trach, sp. n. associated with Heterocerus sp. (Coleoptera, Heteroceridae) from Odessa, Mykolaiv and Kherson Regions; G. khaustovi Trach, sp. n., associated with Bembidion sp. (Coleoptera, Carabidae) from Crimea; G. sevastianovi Trach, sp. n. associated with Heterocerus sp. (Coleoptera, Heteroceridae) from Lugansk Region. These three species are characterised by a number of unique characters: very short peritremes and peritrematal shields, elongated dorsal shield, abnormal for Laelapidae leg chaetotaxy. A key to the species of Gaeolaelaps with extra short peritremes is presented.
The Spanish slug, a species that is considered to be the most destructive pest among molluscs of Europe, is reported to spread widely across Ukraine during last 5–7 years. In addition to its 5 known colonies in Western Ukraine, over 60 new localities from Western, Central, Northern, Southern and Eastern Ukraine are reported for the first time using own materials and reports with photo from the general public. Newly reported localities include such major cities as Kyiv, Kharkiv, Donetsk, Khmelnitsky, Vinnytsia, Ternopil, Zhytomyr, Lutsk, Chernivtsi and Ivano-Frankivsk, and also the settlements in Odesa and Mykolaiv Regions. Species is also reported for the first time from Grodno City in Belarus and from Moscow City in Russia. Much wider future expansion of the Spanish slug in Eastern Europe is expected in near time.
., Shumilov, A. P., Research of residual stresses as a parameter of surface quality , Modern problems of tribotechnics: Materials of the 3rd International Conference, NUK, pp. 133-134, Mykolaiv 2009.  Dvirnaya, O. Z., Shumilov, A. P., Research of the quality parameters of the broaching heat-resistant steel EП517-III surface, Machine building by the eyes of the young: ideas, science, production: materials of the eighth All-Ukrainian Conference, LNTU, pp. 60-61, Lutsk 2008.  Dvirnaya, O. Z., Shumilov, A. P., Research of the quality of the machined groove surface in
The results of the ongoing monitoring of the position of geostationary telecommunication satellite Eutelsat-13B (13° East) are presented in the article. The results were obtained using a radio engineering complex (RC) of four stations receiving digital satellite television and a data processing centre. The stations are located in Kyiv, Mukachevo, Kharkiv and Mykolaiv.
The equipment of each station allows synchronous recording (by the GPS) of fragments of DVB-S signal from the quadrature detector output of the satellite television receiver. Samples of the complex signal are archived and sent to the data processing center through the Internet. Here three linearly independent slant range differences (Δr) for three pairs of the stations are determined as a result of correlation processing of received signals. Every second measured values of Δr are used to calculate Cartesian coordinates (XYZ) of the satellite in the coordinate system WGS84 by multilateration method.
The time series of Δr, X, Y and Z obtained during continuous observations from March to May 2015 are presented in the article. Single-measurement errors of Δr, X, Y and Z are equal to 2.6 m, 3540 m, 705 m and 455 m, respectively. The complex is compared with known analogues. Ways of reduction of measurement errors of satellite coordinates are considered.
The radio engineering complex could be considered a prototype of a system of independent ongoing monitoring of the position of geostationary telecommunication satellites.