scholarly journals Short communication: An overview of the trematodes fauna of pool frog Pelophylax lessonae (Camerano, 1882) in the Volga Basin, Russia: 2. Larval stages

2019 ◽  
Vol 11 (1) ◽  
pp. 106-111
Author(s):  
IGOR V CHIKHLYAEV ◽  
ALEXANDER B RUCHIN ◽  
ALEXANDER I FAYZULIN
Keyword(s):  
Host Specificity ◽  
Geographic Distribution ◽  
Larval Stage ◽  
Short Communication ◽  
Volga Basin ◽  
Larval Stages ◽  
The Past ◽  
Stage Of Development ◽  
The Given ◽  
First Time

Abstract. Chikhlyaev IV, Ruchin AB, Fayzulin AI. 2019. Short communication: An overview of the trematodes fauna of the pool frog Pelophylax lessonae (Camerano, 1882) in the Volga Basin, Russia: 2. Larval stages. Nusantara Bioscience 11: 106-111. This paper presents data on the trematodes fauna of the pool frog Pelophylax lessonae (Camerano, 1882) from 13 regions of the Volga Basin. It consolidates data from different authors over the past 30 years, supplemented by our own research results. There are authentically known findings of 10 trematodes species at the larval stage of development. The species Codonocephalus urniger (Rudolphi, 1819), mtc., Neodiplostomum spathoides Dubois, 1937, mtc. and Pharyngostomum cordatum (Diesing, 1850), mtc. have been observed for the first time in the given host on the territory of Russia and Volga basin. For each species of trematodes, there is the following information is included: taxonomic position, localization, area of detection, biology, definitive hosts, geographic distribution and degree of host-specificity.

scholarly journals Short communication: An overview of the trematodes fauna of pool frog Pelophylax lessonae (Camerano, 1882) in the Volga Basin, Russia: 1. Adult stages

2019 ◽  
Vol 10 (4) ◽  
pp. 256-262
Author(s):  
IGOR V CHIKHLYAEV ◽  
ALEXANDER B RUCHIN ◽  
ALEXANDER I FAYZULIN
Keyword(s):  
Host Specificity ◽  
Geographic Distribution ◽  
Short Communication ◽  
Adult Stage ◽  
Helminth Fauna ◽  
Volga Basin ◽  
Taxonomic Position ◽  
Research Results ◽  
The Past ◽  
Stage Of Development

Abstract. Chikhlyaev IV, Ruchin AB, Fayzulin AI. 2018. Short communication: An overview of the trematodes fauna of pool frog Pelophylax lessonae (Camerano, 1882) in the Volga Basin, Russia: 1. Adult stages. Nusantara Bioscience 10: 256-262.  The paper presents data on fauna of trematodes of a pool frog Pelophylax lessonae (Camerano, 1882) from 13 regions of the Volga basin (Russia). It consolidates data from different authors over the past 80 years, supplemented by our own research results. There are authentically known findings of 19 trematodes species at an adult stage of development. Three species of trematodes make the basis of helminth fauna: Pneumonoeces variegatus, Opisthioglyphe ranae and Diplodiscus subclavatus. By all species of helminths the following data are provided: taxonomic position, localization, area of detection, biology, definitive hosts, geographic distribution and the degree host-specificity.

The helminth fauna study of European common brown frog (Rana temporaria Linnaeus, 1758) in the Volga basin

2014 ◽  
Vol 59 (3) ◽  
Author(s):  
Igor Chikhlyaev ◽  
Alexander Ruchin
Keyword(s):  
Host Specificity ◽  
Geographic Distribution ◽  
Rana Temporaria ◽  
Helminth Fauna ◽  
Volga Basin ◽  
Taxonomic Position ◽  
Frog Rana Temporaria ◽  
Brown Frog ◽  
First Time ◽  
Cosmocerca Ornata

AbstractIn this paper we considered information on the helminth fauna of the European common brown frog (Rana temporaria Linnaeus, 1758) from 10 regions of the Volga basin. This study includes consolidated data of different authors over the last 30 years, supplemented by the results of our own research. There are reliably known finds of 29 species of helminths: Monogenea — 1, Trematoda — 21, Nematoda — 7. Trematodes Gorgodera asiatica Pigulevsky, 1945, Paralepoderma cloacicola (Luhe, 1909), mtc. and nematodes Icosiella neglecta (Diesing, 1851) were observed for the first time in a given host on the territory of Russia and the Volga Basin. Six species of worms make the basis of helminth fauna: nematodes Rhabdias bufonis, Oswaldocruzia filiformis, Neoxysomatium brevicaudatum and Cosmocerca ornata, trematode Haplometra cylindracea and monogenea Polystoma integerrimum. These six species are the most common and widespread parasites of the brown frog. For each species of helminths there is the following information included: taxonomic position, localization, area of detection, biology, definitive hosts, geographic distribution, the degree of host-specificity.

Morphological and biological characteristics of Taenia rileyi Loewen, 1929 (Cestoda: Taeniidae)

1981 ◽  
Vol 59 (4) ◽  
pp. 653-666 ◽  
Author(s):  
R. L. Rausch
Keyword(s):  
Geographic Distribution ◽  
Larval Stage ◽  
Tissue Response ◽  
Biological Characteristics ◽  
Natural Cycle ◽  
Larval Stages

The development and structure of the larval Taenia rileyi Loewen, 1929, a cestode of nearctic felids, were studied in rodents infected experimentally with eggs from strobilae from lynx, Felis lynx L. The larval stage, intermediate in form between a cysticercus and a strobilocysticercus, was found to be unlike that of any other known species of Taenia and is designated a hemistrobilocysticercus. The tissue response in experimentally infected rodents is described. Morphologic features of the strobilar and larval stages by which T. rileyi is distinguished from Taenia omissa Lühe, 1910 are defined, and observations are included concerning geographic distribution and natural cycle.

Morphological descriptions of the larval and first juvenile stages of the decorator crab Camposcia retusa (Latreille, 1829) from laboratory-reared material

Zootaxa ◽  
2019 ◽  
Vol 4577 (2) ◽  
pp. 295
Author(s):  
TIAN XU ◽  
CHAOSHU ZENG ◽  
KATE S. HUTSON
Keyword(s):  
Coral Reefs ◽  
Larval Development ◽  
Red Sea ◽  
Larval Stage ◽  
Morphological Characters ◽  
Larval Stages ◽  
Juvenile Stages ◽  
Decorator Crab ◽  
Newly Hatched Larvae ◽  
First Time

The complete larval and first crab stages of the decorator crab Camposcia retusa (Latreille, 1829) are described and illustrated based on laboratory-reared material for the first time. Specimens were obtained from larvae hatched from adult crabs collected from coral reefs of Queensland, Australia. Newly hatched larvae were successfully reared to settlement as the first-stage crabs. Larval development consisted of two zoeal stages and one megalopal stage. The morphology of each larval stage was compared with those available from a previous study using material from the Red Sea. Due to substantial differences in morphology of the second zoeal and megalopal stages between the two studies, we argue that these larval stages described by the earlier report may not be that of C. retusa. Finally, the morphological characters of both larval and first crab stages of C. retusa are also compared with the corresponding stages of previously reported Inachidae. 

The Separation of Conwentzia pineticola End. from Conwentzia psociformis (Curt.), and Notes on their Biology

1951 ◽  
Vol 42 (3) ◽  
pp. 555-564 ◽  
Author(s):  
Elsie Collyer
Keyword(s):  
Life History ◽  
Feeding Habits ◽  
Distinct Species ◽  
Immature Stages ◽  
Reliable Determination ◽  
Larval Stages ◽  
The Past ◽  
First Time

Conwentzia psociformis (Curt.) and Conwentzia pineticola End. differ as adults in only two characters, and since there are variable and intermediate forms occur, reliable determination is sometimes impossible. In the past, these two species have often been regarded as two forms of the same species.The immature stages of C. pineticola are, however, very different from those of C. psociformis and show that the two are distinct species and can readily be separated on larval characters. The larval stages and egg of C. pineticola are described for the first time, and an account of its life history given.The feeding habits of these two species are described, and mention is made of two other Coniopterygid species that occur in orchards.

Studies on the Anatomy of Cimex lectularius L. II.

Parasitology ◽  
1924 ◽  
Vol 16 (3) ◽  
pp. 269-278 ◽  
Author(s):  
I. M. Puri
Keyword(s):  
Larval Stage ◽  
Body Wall ◽  
The Body ◽  
Cimex Lectularius ◽  
Epithelial Lining ◽  
Compound Structure ◽  
Larval Stages ◽  
First Time

The stink organs are different in structure and position in the adult and the larval stages.The stink organs of the adult are composed of (a) a pair of glands, (b) a central reservoir with two backwardly-directed lateral reservoirs, (c) a median kidney-shaped organ in the central reservoir, and (d) a pair of lateral external openings.Each gland is a multicellular compound structure, opening into the central reservoir. It is described for the first time in this paper.The whole of the stink organ of the adult is formed in the last larval stage from a pair of invaginations of the epithelial lining of the body-wall.In the larval stages the stink organs are simple glands, situated dorsally in abdominal segments III to V.The function of the stink organs is defensive and in the adult perhaps also sexual.

scholarly journals Parasitic nematodes of Pool Frog (Pelophylax lessonae) in the Volga Basin

2019 ◽  
pp. 7314-7321
Author(s):  
Alexander Ruchin ◽  
Igor V. Chikhlyaev ◽  
Alexander I. Fayzulin
Keyword(s):  
Life Cycle ◽  
Host Range ◽  
Nematode Species ◽  
Systematic Position ◽  
Volga Basin ◽  
Parasitic Nematodes ◽  
The Past ◽  
First Time ◽  
Cosmocerca Ornata

Objetive. Present a modern review of the nematodes fauna of the pool frog Pelophylax lessonae (Camerano, 1882) from Volga basin populations on the basis of our own research and literature sources analysis. Materials and methods. Present work consolidates data from different helminthological works over the past 80 years, supported by our own research results. During the period from 1936 to 2016 different authors examined 1460 specimens of pool frog, using the method of full helminthological autopsy, from 13 regions of the Volga basin. Results. In total 9 nematodes species were recorded. Nematode Icosiella neglecta found for the first time in the studied host from the territory of Russia and Volga basin. Three species appeared to be more widespread: Oswaldocruzia filiformis, Cosmocerca ornata and Icosiella neglecta. For each helminth species the following information included: systematic position, areas of detection, localization, biology, list of definitive hosts, the level of host-specificity. Conclusions. Nematodes of pool frog, excluding I. neglecta, belong to the group of soil-transmitted helminthes (geohelminth) and parasitize in adult stages. Some species (O. filiformis, C. ornata, I. neglecta) are widespread in the host range. The latter two are able to reach high invasion indices and also to be the background parasites of the pool frog. It happens due to these nematode species life cycle specificity and the long-term connection of the amphibian with water.

Acquiring penmanship and writing skills from the first to fifth grade of primary school: Joined-up writing vs. Comenia Script

2018 ◽  
Vol 6 (2) ◽  
pp. 1-13
Author(s):  
Olga Kučerová ◽  
Anna Kucharská
Keyword(s):  
Primary School ◽  
Error Rate ◽  
Writing Skills ◽  
Fifth Grade ◽  
Point Scale ◽  
The Past ◽  
School Year ◽  
And Gender ◽  
Developmental Dynamics ◽  
The Given

Abstract The project presented here deals with a typical human means of communication – writing. The aim of the project is to map the developmental dynamics of handwriting from the first to the fifth grade of primary school. The question remains topical because of the fact that several systems of writing have been used in the past few years. Our project focuses on comparing the systems of joined-up handwriting (the standard Latin alphabet) and the most widespread form of printed handwriting: Comenia Script. The research can be marked as sectional; pupils took a writing exam at the beginning and at the end of the 2015/2016 school year. The total number of respondents was 624 pupils, evenly distributed according to the school year, system of writing and gender. To evaluate handwriting, the evaluation scale of Veverková and Kucharská (2012) was adjusted to include a description of phenomena related to graphomotor and grammatical aspects of writing, including the overall error rate and work with errors. Each area that was observed included a series of indicators through which it was possible to create a comprehensive image of the form handwriting took in the given period. Each indicator was independently classified on a three-point scale. Thanks to that, a comprehensive image of the form of writing of a contemporary pupil emerged.

Root with Alternation of -ravn-/-rovn- (From Materials of the Academic Description of Russian Spelling)

2020 ◽  
Vol 81 (6) ◽  
pp. 90-96
Author(s):  
E. V. Arutiunova ◽  
E. V. Beshenkova ◽  
O. E. Ivanova
Keyword(s):  
Russian Language ◽  
Study Guides ◽  
Russian Academy Of Sciences ◽  
Academy Of Sciences ◽  
The Given ◽  
First Time ◽  
The Russian Language

The study investigates the rule of spelling the root -ravn-/-rovn- and is considered to be a fragment of the academic description of Russian spelling, which is currently being under investigation at the Russian Language Institute of the Russian Academy of Sciences. The authors clarify the meanings that determine the spelling of the unstressed root, supplement the lists of exceptions, denote words with meanings not corresponding to the given values-criteria, and, for the first time in linguistics, investigate the words that can be correlated with different values-criteria, that is, they have double motivation. The rule codifies the spelling of words that have double motivation and fluctuate in usus, dictionaries, study guides and reference books. Spelling recommendations for these words correspond to the current linguistic norm and were approved by the Spelling Commission of the Russian Academy of Sciences in 2019. The linguistic commentary to the rule contains the most significant etymological facts concerning the root -ravn-/-rovn- and summarises the scientific and methodological attempts to figure out the distribution of vocabulary with root -ravn-/-rovn- based on the meanings selected in the spelling rules. In the paper it is shown that the instability in spelling of various verbs with the root -ravn-/-rovn- in modern writing and dictionaries is determined by the double motivation of words, as well as contradictory recommendations and gaps in the rules.

LUMINESCENCE OF THE BLACK SEA MICROSCOPIC FUNGI CULTURES

2017 ◽  
Author(s):  
Olga Mashukova ◽  
Olga Mashukova ◽  
Yuriy Tokarev ◽  
Yuriy Tokarev ◽  
Nadejda Kopytina ◽  
...  
Keyword(s):  
Fresh Water ◽  
Black Sea ◽  
Ethyl Alcohol ◽  
Light Emission ◽  
Sea Water ◽  
Control Culture ◽  
Chemical Stimulation ◽  
The Black Sea ◽  
The Given ◽  
First Time

We studied for the first time luminescence characteristics of the some micromycetes, isolated from the bottom sediments of the Black sea from the 27 m depth. Luminescence parameters were registered at laboratory complex “Svet” using mechanical and chemical stimulations. Fungi cultures of genera Acremonium, Aspergillus, Penicillium were isolated on ChDA medium which served as control. Culture of Penicillium commune gave no light emission with any kind of stimulation. Culture of Acremonium sp. has shown luminescence in the blue – green field of spectrum. Using chemical stimulation by fresh water we registered signals with luminescence energy (to 3.24 ± 0.11)•108 quantum•cm2 and duration up to 4.42 s, which 3 times exceeded analogous magnitudes in a group, stimulated by sea water (p < 0.05). Under chemical stimulation by ethyl alcohol fungi culture luminescence was not observed. Culture of Aspergillus fumigatus possessed the most expressed properties of luminescence. Stimulation by fresh water culture emission with energy of (3.35 ± 0.11)•108 quantum•cm2 and duration up to 4.96 s. Action of ethyl alcohol to culture also stimulated signals, but intensity of light emission was 3–4 times lower than under mechanical stimulation. For sure the given studies will permit not only to evaluate contribution of marine fungi into general bioluminescence of the sea, but as well to determine places of accumulation of opportunistic species in the sea.

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