scholarly journals Morphological and Ecological Features of Some Nematodes of the Genus Rhabdochona in Marinka Obtained From Fergana Valley, Uzbekistan

2021 ◽  
Author(s):  
Abdurakhim Kuchboev ◽  
Eldor Kh Najmidinov ◽  
Muzaffar A Mukhamediev ◽  
Rokhatoy R Karimova ◽  
Kader Yildiz
Keyword(s):  
Dissolved Oxygen ◽  
Flow Rate ◽  
Abiotic Factors ◽  
Nematode Species ◽  
Mountain Rivers ◽  
Ecological Features ◽  
Central Asian ◽  
Nutritional Characteristics ◽  
First Time ◽  
Central Asian Republics

Abstract The aim is to study the morphological and ecological features of some nematode species of the genus Rhabdochona parasites of marinka fish in the Fergana Valley, Uzbekistan. Rhabdocona gnedini, Rhabdochona denudata and Rhabdocona hellichi turkestanica were detected as 5.3%, 7.9% and 3.7%, respectively. According to the Authors’ knowledge, Rh. hellichi turkestanica was recorded in Uzbekistan and Central Asian republics for the first time. Rhabdocona spp. were only detected in the intestine of marinkas lived in the mountain rivers Rezaksay, Chodaksay and small tributaries of the Syrdarya river in western Fergana. Some abiotic factors such as the flow rate, water temperature and high content of dissolved oxygen in it, as well as the nutritional characteristics of the fish can be most important factors to spread of Rh.denudata, Rh. gnedini, Rh. hellichi turkestanica in marinkas from mountain rivers of the Fergana Valley.

Taxonomic notes on hexapogon irises (Iridaceae)

Phytotaxa ◽  
2017 ◽  
Vol 328 (3) ◽  
pp. 291
Author(s):  
EUGENY V. BOLTENKOV
Keyword(s):  
Relevant Literature ◽  
Herbarium Specimens ◽  
Original Material ◽  
Central Asian ◽  
Desert Regions ◽  
First Time ◽  
Central Asian Republics

The taxonomic notes in this article are based on the result of an analysis of the protologues, relevant literature, and a study of herbarium specimens of Iris sect. Hexapogon. This section comprises species with bearded claw in both outer and inner segments of perianth. These are relatively poorly known psammophytes occurring mostly in the desert and semi-desert regions of some of the former Soviet Central Asian republics, as well as in Iran, Afghanistan and Pakistan (Baluchistan). It is now generally accepted that I. sect. Hexapogon comprises two species, I. falcifolia and I. longiscapa. The present study has shown that this section contains only I. longiscapa. The name I. falcifolia is for the first time reduced to a synonym of I. longiscapa. A neotype for the name I. longiscapa and lectotypes for the names I. falcifolia and I. filifolia are designated. Notes are provided on the original material for all the three considered names.

scholarly journals The Effect of Dreissena polymorpha on Bacterioplankton, Nematode Fauna and their Relations to Environmental Factors in Ogosta Reservoir (Danube Basin)

2016 ◽  
Vol 18 (1) ◽  
pp. 23-34
Author(s):  
Hristina Kalcheva ◽  
Stefan Stoichev ◽  
Mihaela Beshkova ◽  
Roumen Kalchev ◽  
Marieta Stanchkova ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Species Composition ◽  
Dissolved Oxygen ◽  
Chlorophyll A ◽  
Dreissena Polymorpha ◽  
Nematode Species ◽  
Danube Basin ◽  
Attached Bacteria ◽  
First Time ◽  
Nematode Fauna

AbstractSpatial, seasonal, and annual bacterioplankton dynamics in recently infested by the speciesDreissena polymorphaOgosta Reservoir were studied for the first time during three year period. Bacterioplankton total number was higher in spring in ecotone zones, than in summer at thermocline. NH4-N, PO4-P, turbidity, dissolved oxygen, COD and chlorophyll-a correlate positively, while transparency and Ca2+negatively with bacteria. Nematode species composition, included 22 species studied (13 rarely found andRhabditis brevispinanew for Bulgaria) belonging to nine families. TheD. polymorphaimpact is positive on nematodes and phytoplankton, negative on zooplankton and bacterioplankton, but weak positive on larger bacteria, rods and attached bacteria.

scholarly journals Distribution of blue-green algae (Cyanophyta) in streams of Mt. Stara planina: Serbia

2002 ◽  
Vol 54 (3-4) ◽  
pp. 141-148
Author(s):  
Snezana Simic
Keyword(s):  
Green Algae ◽  
Flow Rate ◽  
Current Flow ◽  
Abiotic Factors ◽  
Principal Coordinates Analysis ◽  
Bottom Type ◽  
Blue Green Algae ◽  
Principal Coordinates ◽  
First Time ◽  
Tolypothrix Distorta

Distribution of blue-green algae was studied at 14 sites along five streams in the Stara Planina mountains. Algological samples were taken from the community of benthos and periphyton in the spring (March-May 1991), summer (June-August 1991, August 1996, July 1997), and autumn (September-November 1991, September 1997). Algae of the classes Chamaesiphonophyceae (species of the genus Chamaesiphon) and Hormogoniophyceae (species of the genera Symploca, Phormidium, Oscillatoria, Schizothrix, Nostoc, Rivularia Homoeothrix, Tolypothrix, and Plectonema) were recorded. The species Chamaesiphon cylindricus, Symploca radians, Phormidium coutinhoi, Nostoc coeruleum, Homoeothrix janthina, Plectonema thomasinianum, and Tolypothrix distorta were registered herein first time in Serbia. Occurrence of blue-green algae in highland brooks and rivers of the Stara Planina mountains was monitored in relation to a large number of abiotic factors e.g. altitude above level, stream dimensions (width and depth), substrate bottom type (%), current flow rate, water temperature and pH oxygen concentration, concentrations of nitrates and phosphates, and BOD5, using Principal Coordinates analysis (PCX)).

Sedelnikovaea baicalensis (Lecanoraceae) — new lichen genus and species for Europe

2018 ◽  
Vol 52 (2) ◽  
pp. 407-416
Author(s):  
T. V. Makryi
Keyword(s):  
Central Asia ◽  
Lichen Species ◽  
Significant Part ◽  
The Urals ◽  
Southern Siberia ◽  
Central Asian ◽  
Northeastern Siberia ◽  
Mountain Belts ◽  
First Time ◽  
Vast Range

Sedelnikovaea baicalensis, the Siberian-Central Asian lichen species, is recorded for the first time for Europe. Based on all the known localities, including those first-time reported from Baikal Siberia, the peculiarities of the ecology and distribution of this species are discussed, the map of its distribution is provided. It is concluded that the species was erroneously considered earlier as a Central Asian endemic. The center of the present range of this lichen is the steppes of Southern Siberia and Mongolia. Assumptions are made that S. baicalensis is relatively young (Paleogene-Neogene) species otherwise it would have a vast range extending beyond Asia, and also that the Yakut locations of this species indicate that in the Pleistocene its range was wider and covered a significant part of the Northeastern Siberia but later underwent regression. Based on the fact that in the mountains of Central Asia the species is found only in the upper mountain belts, it is proposed to characterize it as «cryo-arid xerophyte» in contrast to «arid xerophytes». A conclusion is made that the presence of extensive disjunctions of S. baicalensis range between the Southern Pre-Urals and the Altai-Sayan Mountains or the Mountains of Central Asia is unlikely; the lichen is most likely to occur in the Urals and most of Kazakhstan.

ANALYSIS OF THE FUNCTIONING OF MARINE ECOSYSTEMS ON CHANGING THE PARAMETERS OF THE BIOLUMINESCENCE FIELD ON THE CRIMEAN BLACK SEA SHELF

2017 ◽  
Author(s):  
Svetlana Rubtsova ◽  
Svetlana Rubtsova ◽  
Natalya Lyamina ◽  
Natalya Lyamina ◽  
Aleksey Lyamin ◽  
...  
Keyword(s):  
Black Sea ◽  
Field Intensity ◽  
Deep Water ◽  
Coastal Waters ◽  
Integrated Management ◽  
Abiotic Factors ◽  
Environmental Safety ◽  
The Black Sea ◽  
Intensity Increase ◽  
First Time

The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.

Panagrellus levitatus sp. n. (Rhabditida: Panagrolaimidae), a nematode suppressing Drosophila melanogaster in laboratory cultures

Nematology ◽  
2018 ◽  
Vol 20 (3) ◽  
pp. 285-297 ◽  
Author(s):  
Elena Ivanova ◽  
Ksenia Perfilieva ◽  
Sergei Spiridonov
Keyword(s):  
Drosophila Melanogaster ◽  
New Species ◽  
Nematode Species ◽  
Laboratory Culture ◽  
Ssu Rdna ◽  
Lsu Rdna ◽  
Red Palm Weevil ◽  
Rdna Sequences ◽  
Mass Reproduction ◽  
First Time

A new nematode species recovered from the laboratory culture ofDrosophila melanogasteris described and illustrated. The mass reproduction ofPanagrellus levitatussp. n. in the fly culture occurred several times and resulted in a significant reduction of the fly population. Nematode outbreaks happened after the introduction ofD. melanogasterto the culture from natural sources. The new species is morphologically similar toP. ulmi. Partial LSU rDNA and SSU rDNA sequences were obtained and subjected to phylogenetic analysis that demonstrated the affinity of the new species withPanagrellussp. ‘MC2014’ from a red palm weevil. For the first time, the dauer juveniles ofPanagrelluswere described.

Central Asia in Context of Afghan Situation

2011 ◽  
pp. 3-16
Author(s):  
I. Labinskaya
Keyword(s):  
Central Asia ◽  
The Political ◽  
Academic Council ◽  
Political Sciences ◽  
Central Asian ◽  
Central Asian Republics

The session of IMEMO academic council in December 2010 discussed the problems of Central Asia in the context of the Afghan situation. In her keynote report D. Malysheva, doctor of political sciences, pointed at the increased attention to Central Asia by regional and international players. This is explained by the new and extremely worrying situation in neighboring Afghanistan. There is a prospect that NATO will lose the war in Afghanistan and that the coalition troops will be withdrawn from that country. In its turn, this generates a threat of Taliban’s return to power in this country. Thus, we cannot exclude the political upheavals in the Central Asian republics that will inevitably affect Russia's interests. The discussion highlighted Russia’s stable interest to Afghanistan both politically and economically.

Phimodera flori Fieber, found in Greece on Mount Olympus, new to the Balkan Peninsula (Hemiptera: Heteroptera: Scutelleridae)

Zootaxa ◽  
2021 ◽  
Vol 4958 (1) ◽  
pp. 649-653
Author(s):  
PARIDE DIOLI
Keyword(s):  
Balkan Peninsula ◽  
Southern Europe ◽  
High Altitudes ◽  
First Report ◽  
Asian Species ◽  
Central Asian ◽  
The Alps ◽  
First Time

The first report of Phimodera flori Fieber, 1863 (Hemiptera: Heteroptera: Scutelleridae) in the Balkan Peninsula (Mt. Olympus, Greece) is presented. This continental European and Central Asian species is rare in southern Europe where it has been found only at high altitudes of the Alps and the Pyrenees so far. It has been regarded as extinct from the 1970’s in many countries. The species is recorded for the first time for Greece, being Mt. Olympus the southernmost known locality. 

Ten New Records of Free-living Nematodes from Uttarakhand, India

2018 ◽  
Vol 41 (1) ◽  
pp. 39-42
Author(s):  
Vinita Sharma ◽  
Keyword(s):  
Medicinal Plants ◽  
New Records ◽  
Nematode Species ◽  
Forest Trees ◽  
Wildlife Sanctuary ◽  
Free Living ◽  
First Time

Ten nematode species of order Dorylaimida were recorded for the first time from Uttarakhand during survey of terrestrial nematodes associated with forest trees and medicinal plants in Govind Wildlife Sanctuary, Uttarkashi, Uttarakhand, India.

Epibionts on Hydraena species (Coleoptera: Hydraenidae) from high mountain rivers of Pyrenees (Ordesa and Monte Perdido National Park), with the description of a new species

Zootaxa ◽  
2017 ◽  
Vol 4317 (1) ◽  
pp. 79
Author(s):  
GREGORIO FERNÁNDEZ-LEBORANS ◽  
MARÍA VALLADOLID ◽  
MERCEDES ARAUZO ◽  
ANDRÉS MILLÁN ◽  
REGINA GABILONDO ◽  
...  
Keyword(s):  
New Species ◽  
National Park ◽  
High Mountain ◽  
Mountain Rivers ◽  
Ecological Characteristics ◽  
First Time ◽  
A New Species

Macroinvertebrate samples collected during spring-summer 2013 in high mountain rivers of the Ordesa and Monte Perdido National Park (Pyrenees) contained several Hydraena species (Coleoptera: Hydraenidae) where we found two genera of suctorian ciliates as epibionts: Tokophrya and Discophrya. The individuals of the genus Tokophrya probably belong to species Tokophrya stenostyla, being the first time that this species is observed attached on arthropods. Suctorians of the genus Discophrya were identified as a new species called Discophrya ordesae sp. n. The presence and abundance of epibionts was discussed in the frame of the biological and ecological characteristics of the species of Hydraena where they were found. 

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