A new water mite species of the Hygrobates fluviatilis-complex from Russia (Acari, Hydrachnidia, Hygrobatidae)

The Hygrobates fluviatilis-complex includes the following ten species:H. fluviatilis (Ström, 1768), H.arenarius Smit & Pešić, 2017, H.corsicus Pešić& Smit, 2017, H. marezaensis Pešić & Dabert, 2017,H. turcicus Pešić, Esen & Dabert, 2017, H. persicus Pešić &Asadi, 2017, H. grabowskii Pešić, Saboori, Zawal & Dabert, 2019,H. ulii Pešić, Saboori, Zawal & Dabert, 2019, H. balcanicus Pešić, 2020 and H. mediterraneus Pešić, 2020 (Pešić et al. 2017, 2019, 2020, respectively).This paper gives the description of one further new species of the genus, based on material collected by the author in running waters of the European part of Russia. The material was sampled with a hand net with 250 μm mesh side. Specimens were not fixed in Koenike liquid, but slides were made from fresh material. Idiosomal setae are named according to Tuzovskij (1987). The following abbreviations are used: H—height, L—length; ml—medial length, n—number of specimens measured; P-1-5, pedipalp segments (trochanter, femur, genu, tibia and tarsus); W—width; I-IV-Leg-1–6, first leg, segments 1–6 (trochanter, basifemur, telofemur, genu, tibia and tarsus) i.e. III-Leg-3 = genu of third leg.All measurements are given in micrometers(μm), length of appendage segments is given as dorsal length. The type material is deposited in the collection of the Papanin Institute for Biology of Inland Waters (Borok, Russia).

BIOCHEMICAL INDICES OF BLOOD SERUM OF RUBELLA-RESISTANT CARP BREED AT THE END OF THE FEEDING PERIOD

Biochemical parameters of blood serum in resistant and susceptible to rubella pathogens groups of carp at the end of the feeding period are studied. The material was taken from 6 individuals of the Angelina scaly rubella-resistant breed kept at the experimental pond base "Sunoga" of the Papanin Institute for Biology of Inland Waters RAS, Yaroslavl oblast. For comparison, we used same-age carps from the fish farm "Kirya", Chuvash Republic, susceptible to rubella pathogens: 8 specimens of scaly and 8 mirror carps. Blood samples were taken from the caudal vein of the fish under study. The tube with blood was left at room temperature. After coagulation, the serum was taken with a fine needle syringe and transferred to an Eppendorf tube. Serum samples were frozen prior to testing. The analyzed individuals of the Angelina rubella-resistant breed differ from the scaly and mirror carp in high levels of total protein, albumins, glucose, urea, alkaline phosphatase, triglycerides, cholesterol and low levels of lipids and alanine aminotransferase. A comparative analysis with previously obtained data after wintering shows differences between the autumn and spring data. In the Angelina breed, the levels of most indicators significantly increase during the fattening period. The content of total protein increases several times, mainly due to globulins, glucose, urea, alkaline phosphatase, triglycerides. Thus, the metabolic processes aimed at the accumulation of proteins, stored lipids and carbohydrates increase in the organism of rubella-resistant carps. This is probably due to some specific characteristics of the Angelina breed, which allows the fish organism to successfully resist an infection with rubella pathogens in spring. The results of this study can be used in breeding for immunity resistance and for assessing the health status of fish in aquaculture.

THE 70th ANNIVERSARY OF PROCEEDINGS OF IBIW RAS AS AN OCCASION TO REMEMBER THE HISTORY OF THE ORGANIZATION OF ACADEMIC BIOLOGICAL SCIENCE IN BOROK

In 2020, the journal “Proceed-ings of Papanin Institute for Biology of Inland Waters Rus-sian Academy of Sciences” celebrates its 70th anniversary. The article discusses the organization of an academic institution in 1938 in Borok to conduct biological research and the role of Aleksandr Petrovich Shennikov, corresponding member of the USSR Academy of Sciences, in this process.

New data on the fauna of Heteroceridae (Coleoptera) of the Republic of Khakassia (Eastern Siberia)

The recent status of the family Heteroceridae in Siberia is discussed and the main references are given. From ten species of the Heteroceridae, which have been reported for the fauna of Siberia, only one species Heterocerus parallelus Gebler, 1830 was previously recorded in southern Khakassia. Here we presented six species from two genera of the family Heteroceridae (Coleoptera), which we collected in the Republic of Khakassia (Eastern Siberia, Russia). We recorded five species (Augyles interspidulus (Charpentier, 1979), Heterocerus fenestratus (Thunberg, 1784), H. fossor Kiesenwetter, 1843, H. fusculus Kiesenwetter, 1843, and H. obsoletus Curtis, 1828) in Khakassia for the first time. We collected the material in Abakan River valley (Abakan city) using an ultraviolet lamps in 2018–2019. We used BLB-T5/4W Ultraviolet Black Light Bulb with 2–3 hours of exposure from May 27 to October 13, 2018 and FLU10 T8 G13/18W with 2–13 hours of exposure from March 31 to October 10, 2019. Second author collected the majority of examined specimens; all specimens are deposited in collection of the Papanin Institute for Biology of Inland Waters of the Russian Academy of Sciences.

International scientific-practical conference “Floodplain and Delta biogeocenoses of the Holarctic: biological diversity, ecology and evolution”, held in the Astrakhan region on May 13–18, 2019

The International scientific-practical conference “Floodplain and delta biogeocenoses of the Holarctic: biological diversity, ecology and evolution” took place in the Astrakhan region on May 13–18, 2019. The conference was organized by the Astrakhan State University and Papanin Institute for bio­logy of Inland Waters of the Russian Academy of Scien­ces. The conference lasted four days; altogether 27 participants fr om 12 organizations including the universities, several institutions of the Russian Academy of Sciences and botanical gardens. 14 oral and one poster presentations were given. The conference was attended by scientists from Astrakhan, Borok, Arkhangelsk, Tobolsk, Surgut, Novosibirsk, Tomsk, St. Petersburg and Moscow. Correspondence participants of the conference were from Belarus, England and Italy. 39 articles are published in the Proceeding of the conference (Floodplain…, 2019). During three days three excursions to the floodplain, desert and steppe ecosystems were held for the conference participants, wh ere they could see the flora, vegetation and landscapes of the Volga-Akhtuba floodplain, Berli sands, Baskunchak salt lake and Bolshoye Bogdo Mountain. In the last day participants proposed the idea of creating a Floodplain scientific community in the Russia.