scholarly journals Morphology and zoogeography of the burrower-like gammarid Gammarus koshovi (Bazikalova, 1946) (Crustacea, Amphipoda, Gammaridae) – An overlooked and poorly known species in the Siberian fauna

2021 ◽  
Vol 774 ◽  
pp. 178-199
Author(s):  
Dmitry Sidorov ◽  
Elena Yalysheva ◽  
Mariana Sharyi-Ool
Keyword(s):  
Species Diversity ◽  
Comparative Study ◽  
Identification Key ◽  
Large Species ◽  
Gammarus Lacustris ◽  
South Siberia ◽  
Comprehensive Survey ◽  
Compact Body ◽  
Distribution And Ecology

A comprehensive survey of several lakes in the Tuva Republic of Russia yielded, besides the ubiquitous Gammarus lacustris, the discovery of a small freshwater, lacustrine amphipod not previously recorded in this area. A comparative study of the Tore-Khol Lake gammarid population, probably conspecific with Gammarus koshovi (Bazikalova, 1946) originating from Khubsugul Lake, was conducted. The species, G. koshovi, is characterized by a specific habitus: a small-sized compact body, all limbs shortened, carpi of pereopods (PIII and PIV) reduced, coxal plates broad, and pereopod dactyli sturdy. It has been suggested that juveniles of the euryoecious G. lacustris or other large species could be confused with the relatively small G. koshovi. Consequently, we decided to present the distribution of gammarid species throughout south Siberia and Mongolia, referring to the sequences of works primarily by Soviet authors, which may be hard to access by international readers. We discuss affinity with related groups, distribution, and ecology of G. koshovi to better understand their evolution. Additionally, the zoobenthic species diversity of widely represented groups in the ecosystems of Tore-Khol Lake is briefly reviewed. An identification key for the Siberian Gammarus with 10 species is provided.

scholarly journals RAPD-ANALYSIS OF CYCLAMEN SPP. GENOME POLYMORPHISM

2019 ◽  
Vol 7 ◽  
pp. 949-953
Author(s):  
Elza Makaradze ◽  
Galina Meparishvili ◽  
Natela Varshanidze ◽  
Inga Diasamidze ◽  
Ketevan Dolidze ◽  
...  
Keyword(s):  
Genetic Polymorphism ◽  
Species Diversity ◽  
Rapd Markers ◽  
Biological Diversity ◽  
Molecular Genetic ◽  
Wild Plants ◽  
Large Species ◽  
Genetic Studies ◽  
Rapd Pcr ◽  
Rare Endemic

Wild plants form the basis of biological resources both for Georgia and the whole world. A strategic task of any country is to preserve the biological diversity of plants. In the territory of Ajara, a large species diversity of plants grows, among which there are rare, endemic and relict plants. In particular, Cyclamen adzharicum. Modern systematics of wild plants in Georgia is based on classical methods of botany. In this regard, it is relevant to conduct genetic studies of species diversity and genetic polymorphism of species and populations using molecular genetic markers, in particular RAPD-PCR methods. The purpose of this study was to identify genetic polymorphism in Cyclamen L species using RAPD methods. As a result of the conducted research the 65 RAPD-markers in length from 150 to 1500 BP have been revealed. The number of the amplified fragments DNA varied depending on the primer from 6 (OPA-2) to 11 (OPB-4). The results of grouping Cyclamen adzharicum and C. coum samples allowed two clusters to be identified. In the first cluster were samples of three populations Cyclamen adzharicum and showed a low stubble in the intra-species variability. Cyclamen coum was attributed to the second cluster. The used primers gave the opportunity to identify polymorphism between the tested types of cyclamen.

scholarly journals Comparative Histomorphology of the Ovary and the Oviduct in Rabbits and Pigeons

2018 ◽  
Vol 35 (04) ◽  
pp. 242-245
Author(s):  
Helga Ishaya ◽  
Imelda Omaga ◽  
Nathan Dibal ◽  
Martha Attah
Keyword(s):  
Comparative Study ◽  
Microscopic Study ◽  
Evolutionary Relationship ◽  
Left Ovary ◽  
Yolk Granules ◽  
Parenchyma Cells ◽  
Compact Body ◽  
Morphological Differences ◽  
Mode Of Development ◽  
Domestic Pigeons

Introduction Knowledge of the evolutionary relationship between different classes of vertebrates can be obtained through a comparative study of their structures, forms, functions, and of the mode of development of the structures. Birds and mammals are vertebrates with different modes of reproduction, that is, oviparity in birds and viviparity in mammals. The aim of the present study is to compare the histomorphology of the ovaries and of the oviducts/uterine tubes in rabbits and pigeons. The present study highlights the histological and morphological differences that bring about the production of eggs in birds and the production of fully developed fetuses in mammals. Materials and Methods Five rabbits and five domestic pigeons were anesthetized with chloroform and sacrificed. The ovaries and the oviducts/uterine tubes were dissected and fixed in Bouin fluid and processed for a light microscopic study. Results The result showed paired ovaries and uterine tubes in rabbits that unite at the isthmus to form a single uterus that opens into the vagina, with only the left ovary and oviduct appearing as a compact body with distinct infundibulum, magnum, isthmus, uterus and vagina in pigeons. Photomicrographs of the ovaries of rabbits showed parenchyma cells with primary follicles, while the ovaries of pigeons showed developing follicles and yolk granules. Both the oviducts of rabbits and of pigeons showed a highly folded mucosa with a thick muscular wall. Conclusion The differences observed in the structures of the ovaries and of the oviducts of rabbits and pigeons might be due to their different reproductive functions in parturition (viviparity and oviparity, respectively).

Contribution to the knowledge of African Parakalummidae (Acari, Oribatida)

2020 ◽  
Vol 25 (1) ◽  
pp. 113-124
Author(s):  
Sergey G. Ermilov ◽  
Josef Starý
Keyword(s):  
New Species ◽  
Leaf Litter ◽  
National Park ◽  
Oribatid Mites ◽  
Identification Key ◽  
African Species ◽  
Two New Species ◽  
Distribution And Ecology

Two new species of oribatid mites of the genus Neoribates (Oribatida, Parakalummidae) are described based on adult specimens from leaf litter in the Montagne d'Ambre National Park of North Madagascar. Neoribates africanus sp. nov. and N. madagascarensis sp. nov. clearly differs from all species of the genus by the absence of interlamellar seta (including alveolus). An identification key and data on distribution and ecology of known African species of Parakalummidae are presented.

Charophyte Flora of South-eastern South Australia and South-western Victoria, Australia: Systematics, Distribution and Ecology

1999 ◽  
Vol 47 (3) ◽  
pp. 407 ◽  
Author(s):  
Adriana García
Keyword(s):  
South Australia ◽  
Identification Key ◽  
South Eastern ◽  
Ecological Requirements ◽  
Chara Globularis ◽  
First Approximation ◽  
Floristic Analysis ◽  
Distribution And Ecology ◽  
Western Victoria

The charophytes (Charales, Charophyta) from south-eastern South Australia and south-western Victoria were studied on the basis of collections from 56 waterbodies, 39 of which included charophytes. Chara globularis var. globularis (Thuillier) Wood, C. globularis var. virgata (KÜtzing) Wood, C. fibrosa var. fibrosa (Agardh ex Bruzelius) Wood, C. fibrosa var. acanthopitys (Braun) Wood, C. hookeri Braun, C. preissii (Braun) Wood, Lamprothamnium macropogon (Braun) Ophel, Nitella ignescens García, N. ungula García, N. lhotzkyi (Braun) Braun, N. aff. lhotzkyi, and N. congesta (Brown) Braun were recognised. An identification key for these species makes determination possible. A brief characterisation of the environment where the charophytes were found is provided, as a first approximation of the ecological requirements of Australian charophytes. At this stage their distribution can be mainly related to salinity, with charophytes living in fresh to hypersaline conditions (0.0–58.0 g L–1). Special attention is put on L. macropogon, a euryhaline calcifying species, which has the broadest distribution in the area. The floristic analysis shows endemism, dioecism and a high diversification of non-calcifying taxa as the main characteristics of the charophyte flora analysed.

scholarly journals Similarities and Differences between the Yakut Olonkho and the Buryat Uliger: Plot Composition and Motives

2021 ◽  
pp. 135-151
Author(s):  
A. F. Koryakina
Keyword(s):  
Comparative Study ◽  
Central Asia ◽  
Stages Of Development ◽  
Scientific Methods ◽  
South Siberia ◽  
The World ◽  
Genetic Origins ◽  
Similarities And Differences ◽  
The Comparative Study ◽  
Stated Problem

The article is devoted to the identification of typological similarities and differences in epic plots and motives in the texts of the Yakut olonkho and the Buryat uliger. The relevance of the stated problem is due to the purpose of obtaining additional materials to confirm the results of earlier studies on establishing the genetic origins and typological connections of the epic creativity of the Yakut and Buryat peoples. A brief review of the study of the problem in the works of domestic folklorists, who developed the theory of the comparative study of the peoples of the world epics; Yakut epic scholars, who considered in their works the historical and typological connections of the Yakut olonkho with the epics of the Sayan-Altai, Mongol-Buryat peoples; Buryat scientists who turn in their research to the processes of historical and cultural mutual influences of the epic heritage of the Yakuts and Mongol-Buryats. Scientific methods of typological, structural-comparative and textological analysis are used. The similarity of the plots and plot motives of the olonkho “Nyurgun Bootur the Swift” by K. Orosin and the uliger “Abai Geser Mighty” by M. Imegenov, which is due to the principles of typological repetition in folklore and cultural and historical contacts of the Yakut and Buryat peoples at different stages of development of the Proto-Turkic peoples inhabiting the territory of Central Asia and South Siberia.

scholarly journals Distribution, bioecological peculiarities of staphylinids (Coleoptera, Staphylinidae) in livestock biocenoses of forest-steppe and steppe Ukraine

2020 ◽  
Vol 28 (1) ◽  
pp. 24-28
Author(s):  
A. P. Palyi ◽  
A. N. Makshei ◽  
O. I. Kasianenko ◽  
R. V. Petrov ◽  
L. I. Faly ◽  
...  
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Temperature Regime ◽  
Egg Laying ◽  
Forest Steppe ◽  
Large Species ◽  
Larval Stages ◽  
Laboratory Conditions ◽  
Feeding Specialization ◽  
Food Consumed

As a result of research in the territory of livestock farms, 103 species of predatory Coleoptera were found, including Staphylinidae accounting for 51.4%, Histeridae – 27.3%, Carabidae – 21.3%. A total of 39 species of the Staphylinidae family were identified, belonging to 5 subfamilies: Oxytelinae, Steninae, Staphylininae, Tachyporinae, Aleocharinae. Species composition of staphylinids varied in relation to the types of animal rearing premises. In cowsheds and calf pens species diversity was higher (35 species). To study the peculiarities of feeding in laboratory conditions, we monitored 9 species of Staphylinidae: Philonthus addendus Sharp, Ph. cruentatus (Gmel.), Ph. rectangulus Sharp, Ph. varians (Payk.), Ph. spinipes Sharp, Ph. nitidus F., Creophilus maxillosus (L.), Ontholestes murinus (L.), Oxytelus sp. Feeding specialization of imagoes and larvae of different ages was studied. We determined that the mass of food consumed per day is higher than the weight of the beetles. Large species of staphylinids prefer feeding on average-aged larvae of flies and can eat puparia. Peculiarities of the development of coprophilous staphylinids were studied on the example of Ph. spinipes Sharp. During 24 h a female laid 1–3 eggs (in +28°С). Duration of the egg phase depends on the temperature regime (in +20 °С – 4–5, +28 °С – 3–4 days). Cessation of egg laying was observed with decrease in the temperature to +14 °С. The development takes part in three larval stages. Duration of the larva phase at +28 °С was 8–10 days, at +20 °С – 13–14 days. The first moulting was observed on the 2–3th days (in +28 °С) after the larvae emerged from the eggs. At +28 °С the pupa phase lasted 8–10 days. Decrease in temperature prolonged the rate of the development. At +24 °С it practically did not change (9–10 days), at +18 °С – increased to 13–15 days.

scholarly journals MACROBENTHOS OF THE CRENAL AND RITHRAL ZONES OF A TYPICAL «SALMON» RIVER IN NORTHEASTERN SAKHALIN ISLAND (ON EXAMPLE OF THE DAGI RIVER)

2019 ◽  
Vol 196 ◽  
pp. 138-154
Author(s):  
V. S. Labay ◽  
A. I. Novoselova ◽  
O. N. Berezova ◽  
O. B. Sharlay ◽  
T. S. Shpilko ◽  
...  
Keyword(s):  
Species Diversity ◽  
State University ◽  
Salmon River ◽  
Gammarus Lacustris ◽  
Quantitative Indices ◽  
Bottom Communities ◽  
River Bed ◽  
Composition And Structure ◽  
Middle Stream ◽  
Mountainous Landscapes

Structure and quantitative indices of macrobenthos, features of its distribution along the river bed, and basic communities of macrobenthos are described for the crenal and rithral zones of the Dagi River (northeastern Sakhalin) on the data collected in the expedition of Sakhalin State University in September 2017. Five river landscapes are described: 1) plain riverbed with significant alluvial forms; 2) mountain riverbed with significant alluvial forms; 3) plain riverbed with weak alluvial forms; 4) wellhead zone of a plain riverbed with significant alluvial forms; 5) estuary. The main elements of the river bed are partially mixed in the middle stream: the mountainous landscapes with significant alluvial forms are overlapped with the plain landscapes with weak alluvial forms. Distribution of macrobenthos along the river bed and the types of bottom communities are clearly corresponded with the river landscapes. So, the macrobenthos distribution in the Dagi River is physically controlled: the species diversity and abundance of macrozoobenthos increases downstream from the crenal to the rithral zone and further to the combined rithral-potamal zone. A significant increasing of the biomass is noted in the middle and lower rithral zone due to aggregations of freshwater pearl mollusc Margaritifera dahurica which confine with the spawning grounds of pacific salmons. The most common are the bottom communities of Hexatoma and Gammarus lacustris, which are noted almost in all surveyed areas. Other bottom communities are landscape-specific. In the rithral zone, composition and structure of macrobenthos are determined by distance to the riverbank, type of bottom sediments, flow velocity, and lithodynamic regime, so the communities form a consequence determined mainly by lithodynamic regime — the Hexatoma community in the lithodynamic zone of transportation could be followed either by the communities of Trichoptera, Plecoptera, and Diptera in the lithodynamic zone of erosion or by the communities of amphipods G. lacustris and larvae of day-flies Ephemera sachalinenesis in the lithodynamic zone of accumulation.

Contribution to the knowledge of the oribatid mite genus Eurostocepheus (Acari, Oribatida, Otocepheidae)

2017 ◽  
Vol 22 (5) ◽  
pp. 640
Author(s):  
Sergey G. Ermilov ◽  
Josef Starý
Keyword(s):  
New Species ◽  
National Park ◽  
Oribatid Mite ◽  
Identification Key ◽  
Northern Vietnam ◽  
Distribution And Ecology ◽  
Tam Dao National Park ◽  
Transverse Position ◽  
A New Species ◽  
Mite Genus

A new species of the genus Eurostocepheus (Oribatida, Otocepheidae) is described from soil and litter of Tam Dao National Park in Northern Vietnam. Eurostocepheus (Eurostocepheus) wojciechniedbalai sp. nov. is morphologically most similar to E. (E.) mahunkai Mondal & Kundu, 1999 from India in the presence of four pairs of genital setae and medial prodorsal condyles, but differs by the quadrangular, anteromedially excavated lateral notogastral condyles, short interlamellar setae, short notogastral setae c, minute epimeral setae 1a, 2a, 3a, two pairs of epimeral setae on epimere IV, and by the transverse position of the anal setae. Revised generic and subgeneric diagnoses, an identification key to the known taxa, and data on the distribution and ecology of Eurostocepheus are presented.

Species diversity and spatial distribution of Begonia L. (Begoniaceae) in the Daweishan Range, Yunnan Province, China

Phytotaxa ◽  
2019 ◽  
Vol 415 (1) ◽  
pp. 1-31 ◽  
Author(s):  
WEN-HONG CHEN ◽  
SU-HUA HUANG ◽  
AUNG AUNG ◽  
HUI-KUN YUAN ◽  
YU-MIN SHUI
Keyword(s):  
Spatial Distribution ◽  
Species Diversity ◽  
Geographical Distribution ◽  
Yunnan Province ◽  
Southwestern China ◽  
Floristic Diversity ◽  
Infraspecific Taxa ◽  
Distribution And Ecology

Seven sections and 50 species and infraspecific taxa of Begonia have been recorded in the Daweishan Range of Yunnan Province, southwestern China. This work aims to analyze the relationships between their geographical distribution and ecology, review their floristic diversity, and elucidate the abundance and horticultural value of Begonia resources in this region.

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