New findings of the Chinese sleeper Perccottus glenii (Odontobutidae) in water bodies of Transbaikal krai

2015 ◽  
Vol 55 (2) ◽  
pp. 289-291
Author(s):  
E. P. Gorlacheva ◽  
V. P. Gorlachev
Keyword(s):  
Water Bodies ◽  
Perccottus Glenii ◽  
New Findings

scholarly journals The use of native piscivorous fishes for the eradication of the invasive Chinese Sleeper, Perccottus glenii

2019 ◽  
pp. 21
Author(s):  
Vytautas Rakauskas ◽  
Tomas Virbickas ◽  
Saulius Stakėnas ◽  
Andrius Steponėnas
Keyword(s):  
Biological Control ◽  
Invasive Species ◽  
Ecological Impacts ◽  
Control Measures ◽  
Water Bodies ◽  
Management Tool ◽  
Complete Disappearance ◽  
Perccottus Glenii ◽  
Eutrophic Lakes ◽  
Study Results

The chief aim of invasive species management is to prevent biological invasions by taking measures for suppressing or eradicating potential invaders. Biological control as a management tool is frequently implemented to reduce the population size, adverse ecological impacts, and dispersal of invasive species. The efficacy of biological control measures in managing the Perccottus glenii population was assessed in four small lakes of Lithuania. The biocontrol was carried out by introducing the native piscivorous fishes Esox lucius and Perca fluviatilis into the invaded water bodies for two successive reproductive seasons. The stocking of these fishes led to an instant reduction in P. glenii abundances, and the outcome of the repeated stocking was complete disappearance of the species from the water bodies investigated. Our study proves that native predator fishes can be successfully used for eradicating well-established P. glenii populations in small eutrophic lakes. We hope the current study results will contribute to developing risk-commensurate methodologies for the control of invasive P. glenii populations in small water bodies.

scholarly journals Finding Of Gyrodactylus perccotti (Plathelminthes, Gyrodactylidae) In Water Bodies Of Kyiv Region

2015 ◽  
Vol 49 (2) ◽  
pp. 181-184 ◽  
Author(s):  
N. V. Zaichenko
Keyword(s):  
Water Bodies ◽  
Amur Sleeper ◽  
Perccottus Glenii ◽  
Specific Parasite

Abstract Specific parasite of the introduced by accident fish the Amur sleeper, Perccottus glenii, monogenean Gyrodactylus perccotti Ergens et Yukhimenko, 1973 was found in Kyiv Region, Ukraine. Dimensions of haptoral chitinous parts are given.

scholarly journals First insights into the molecular population structure and origins of the invasive Chinese sleeper, Perccottus glenii, in Europe

NeoBiota ◽  
2020 ◽  
Vol 57 ◽  
pp. 87-107
Author(s):  
Joanna Grabowska ◽  
Yuriy Kvach ◽  
Tomasz Rewicz ◽  
Mihails Pupins ◽  
Iuliia Kutsokon ◽  
...  
Keyword(s):  
Eastern China ◽  
Russian Far East ◽  
Far East ◽  
Water Bodies ◽  
Perccottus Glenii ◽  
East European ◽  
North Eastern ◽  
Unidentified Source ◽  
Cyprinid Fishes ◽  
Unintentional Introduction

The aim of our study was to provide a first overview of the population genetic structure of the invasive Chinese sleeper, Perccottus glenii, (Actinopterygii: Odontobutidae) in European water bodies. This species originates from inland waters of north-eastern China, northern North Korea and the Russian Far East. The 1172 bp long portion of the cytochrome b gene was sequenced from Chinese sleeper specimens collected from a variety of water bodies in Belarus, Bulgaria, Hungary, Germany, Latvia, Lithuania, Poland, Russia (European part) and Ukraine. Our study revealed that the invasive Chinese sleeper in Europe consists of at least three distinct haplogroups that may represent independent introduction events from different parts of its native area; i.e. three founding populations: (1) Baltic haplogroup that may originate either from fish introduced inadvertent from Russia or from some unidentified source (release by aquarists). So far, this haplogroup has been found only in the Daugava basin in Latvia. (2) East-European haplogroup that may originate from an unintentional introduction to the Volga basin in Russia and has expanded westward. So far, this group was recorded in the Volga, Upper Dnieper and Neman drainages in Belarus, Lithuania, and Russia. (3) Carpathian haplogroup, that originated from individuals unintentionally introduced with Asian cyprinid fishes to Lviv region in Ukraine and are now widely distributed in Central Europe.

scholarly journals Zooplankton of floodplain lakes of the river Kerzhenets (Kerzhinski Nature Reserve, Nizhny Novgorod Region)

2018 ◽  
Vol 7 (2) ◽  
pp. 138-144
Author(s):  
Galina Vasilievna Shurganova ◽  
Vyacheslav Sergeevich Zhikharev ◽  
Ivan Aleksandrovich Kudrin ◽  
Tatyana Vasilievna Krivdina ◽  
Olga Alekseevna Moreva
Keyword(s):  
Nature Reserve ◽  
Floodplain Lakes ◽  
Water Bodies ◽  
The Arctic ◽  
Relict Species ◽  
The North ◽  
New Findings ◽  
Suspended Substances ◽  
June July ◽  
Nizhny Novgorod Region

The paper presents the results of zooplankton research in June, July and September 2017 in eight floodplain lakes of the middle reaches of the Kerzhenets River located in the Kerzhinski Nature Reserve. The studied water bodies are shallow lakes with weakly acidic pH (5,40-6,23) and low mineralized water (46,90-68,40 mg/l), with increased chromaticity (202,00-1048,20 deg.) and content of suspended substances (4,40-22,90 mg/l). As a result of a carried out hydrobiological research, 106 species of zooplankton were identified. According to the zoogeographical characteristics, the zooplankton fauna of floodplain water bodies is typical for the European part of Russia, with the exception of two invasive species: the North American rotifers Kellicottia bostoniensis (Rousselet, 1908) and the Caspian branching diocese of southern origin Diaphanosoma orghidani (Negrea, 1982). In addition, in a number of lakes, the Arctic relict crustacean Holopedium gibberum (Zaddach, 1855) was found. The crustacean is listed in the Red Data Book of the Nizhny Novgorod Region. Alien rotifers in a number of floodplain reservoirs were the dominant species and had a high abundance. The Caspian southern crustacean was found only in two reservoirs, its number was not high, and it did not play a significant role in the zooplankton communities of these reservoirs. New findings of the Arctic relict species Holopedium gibberum (Zaddach, 1855) make it possible to recommend the introduction of a number of floodplain reservoirs into the Red Book of the Nizhni Novgorod Region as habitats of this rare species. Statistical redundancy analysis (RDA) has revealed four factors that related with development of zooplankton in a number of floodplains, such as water temperature, hydrogen index, dissolved oxygen content and suspended solids.

scholarly journals INVERTEBRATES IN THE COMMUNITY OF URBAN POND NEAR NOVO-SADOVAJA STREET (SAMARA-CITY) IN 2010

2015 ◽  
Vol 4 (2) ◽  
pp. 61-65
Author(s):  
Yuriy Leonidovich Gherasimov
Keyword(s):  
Seasonal Dynamics ◽  
Pond Water ◽  
Negative Influence ◽  
Water Bodies ◽  
Perccottus Glenii ◽  
Water Characteristics ◽  
Pond Ecosystem ◽  
Species Similarity ◽  
Urban Pond ◽  
Ecosystem State

The state of right pond of two nearly located small ponds in Samara-city was described. 47 Rotatoria species (26 genus, 18 familiars) was found in 2010, the list of met rotifer species is quoted. The Brachionidae, Phylodinidae and Synchaetidae have maximum species quantity. The numerity and biomass seasonal dynamics was studied. Two numerity and biomass growths (in May and August) observes in majority Rotifera populations. Brachionidae i Synchaetidae had maximal numerity, Asplanchnidae and Synchaetidae have maximal biomass. The Rotatoria numerity was in twice more than in near located pond. Value of index species similarity of Serensen is equal 7,27. The Shannon and Pielu indexes was calculated. 17 water Insect species lives in pond. Crustaceans, Gastropods, Turbellaria, Nematoda, Oligochaeta and Ciliophora was founded in pond. The fish Perccottus glenii was founded too. The chemical analisis show four water characteristics was greater than LAC values. The pond water toxicity for Daphnia was studied in laboratory, the N.S.Stroganov standart method was used. The pond water didn't show negative influence for Daphnia survival and fecundity. The species numerity in studied pond is greater than in some urbanized water bodies. The pond ecosystem state is close to satisfactory.

Further studies on the ultrastructure of the cochlea

1990 ◽  
Vol 48 (3) ◽  
pp. 440-441
Author(s):  
Zhixian Wang ◽  
Pinjin Zhu ◽  
Jianhe Sun ◽  
Xuezheng Song
Keyword(s):  
Hair Cells ◽  
Military Medicine ◽  
Outer Hair Cells ◽  
Apical Surface ◽  
Epithelial Surface ◽  
Hearing Research ◽  
New Findings ◽  
Fine Structures ◽  
Temporal Bones ◽  
Accurate Observation

Hearing research is important not only for clinical, professional and military medicine, but also for toxicology, gerontology and genetics. Ultrastructure of the cochlea attracts much attention of electron microscopists, (1―3) but the research lags far behind that of the other parts of the organnism. On the basis of careful microdissection, technical improvment and accurate observation, we have got some new findings which have not been reported in the literature.We collected four cochleas from human corpses. Temporal bones dissected 1 h after death and cochleas perfused with fixatives 4 h after death were good enough in terms of preservation of fine structures. SEM:The apical surface of OHCs (Outer hair cells) and DTs (Deiters cells) is narrower than that of IPs (Inner pillar cells). The mosaic configuration of the reticular membrane is not typical. The stereocilia of IHCs (Inner hair cells) are not uniform and some kinocilia could be seen on the OHCs in adults. The epithelial surface of RM (Reissner’s membrane) is not smooth and no mesh could be seen on the mesothelial surface of RM. TEM.

Insights into the biochemical and functional characterization of sortase E transpeptidase of Corynebacterium glutamicum

2019 ◽  
Vol 476 (24) ◽  
pp. 3835-3847 ◽  
Author(s):  
Aliyath Susmitha ◽  
Kesavan Madhavan Nampoothiri ◽  
Harsha Bajaj
Keyword(s):  
Protein Engineering ◽  
Cell Attachment ◽  
Functional Characterization ◽  
Protein Structures ◽  
Structural Similarity ◽  
Surface Proteins ◽  
Sortase A ◽  
Peptide Cleavage ◽  
New Findings

Most Gram-positive bacteria contain a membrane-bound transpeptidase known as sortase which covalently incorporates the surface proteins on to the cell wall. The sortase-displayed protein structures are involved in cell attachment, nutrient uptake and aerial hyphae formation. Among the six classes of sortase (A–F), sortase A of S. aureus is the well-characterized housekeeping enzyme considered as an ideal drug target and a valuable biochemical reagent for protein engineering. Similar to SrtA, class E sortase in GC rich bacteria plays a housekeeping role which is not studied extensively. However, C. glutamicum ATCC 13032, an industrially important organism known for amino acid production, carries a single putative sortase (NCgl2838) gene but neither in vitro peptide cleavage activity nor biochemical characterizations have been investigated. Here, we identified that the gene is having a sortase activity and analyzed its structural similarity with Cd-SrtF. The purified enzyme showed a greater affinity toward LAXTG substrate with a calculated KM of 12 ± 1 µM, one of the highest affinities reported for this class of enzyme. Moreover, site-directed mutation studies were carried to ascertain the structure functional relationship of Cg-SrtE and all these are new findings which will enable us to perceive exciting protein engineering applications with this class of enzyme from a non-pathogenic microbe.

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