Morphological, histological, and molecular aspects of Myxobolus zaikae n. sp., a parasite of the roach Rutilus rutilus, in Lake Baikal

2020 ◽  
Vol 142 ◽  
pp. 75-82
Author(s):  
MD Batueva
Keyword(s):  
Connective Tissue ◽  
Lake Baikal ◽  
Rutilus Rutilus ◽  
Lateral View ◽  
Cyprinid Fish ◽  
Spore Morphology ◽  
Frontal View ◽  
Roach Rutilus Rutilus ◽  
The Common ◽  
Molecular Aspects

A new myxobolid species, Myxobolus zaikae n. sp., was found in the connective tissue near the kidney and liver blood vessels of the common roach Rutilus rutilus, while fish myxosporean fauna were being investigated in Lake Baikal, Russia. The parasites were studied on the basis of spore morphology as well as with histological and molecular methods. Mature spores of M. zaikae n. sp. are round or ellipsoidal in the frontal view and lemon-shaped in the lateral view, measuring 11.37 ± 0.11 µm (10.2-14.0 µm) in length, 10.29 ± 0.10 µm (9.6-11.0 µm) in width, and 6.3 ± 0.08 µm (5.8-7.1 µm) in thickness (mean ± SD; n = 50). Polar capsules are equal and pyriform, measuring 4.5 ± 0.07 µm (3.4-5.2 µm) in length and 2.9 ± 0.03 µm (2.6-3.3 µm) in width. Polar capsules contained polar filaments coiled with 5 to 6 turns. Phylogenetic analysis showed that this newly described species clusters with other myxobolid species infecting the connective tissue of different organs from Palearctic cyprinid fish.

scholarly journals Myxobolus opsaridiumi sp. nov. (Cnidaria: Myxosporea) infecting different tissues of an ornamental fish, Opsaridium ubangiensis (Pellegrin, 1901), in Cameroon: morphological and molecular characterization

2021 ◽  
Vol 733 ◽  
pp. 56-71
Author(s):  
Guy Benoit Lekeufack-Folefack ◽  
Armandine Estelle Tchoutezo-Tiwa ◽  
Jameel Al-Tamini ◽  
Abraham Fomena ◽  
Suliman Yousef Al-Omar ◽  
...  
Keyword(s):  
Sequence Similarity ◽  
Lateral View ◽  
Cyprinid Fish ◽  
Ornamental Fish ◽  
Histopathological Analysis ◽  
Frontal View ◽  
Blast Search ◽  
The City ◽  
Morphological And Molecular Characterization ◽  
Different Tissues

We report a new myxozoan, Myxobolus opsaridiumi sp. nov., infecting the ornamental fish Opsaridium ubangiensis (Pellegrin, 1901) collected from the Anga River near the city of Yaounde, Cameroon. Plasmodia were found in the skin, muscles and spleen. The overall prevalence of infection was 54.7% (288 parasitized fish out of 526 examined). The myxospores were ovoid to subspherical in frontal view and lenticular in lateral view. The valves were symmetrical and relatively thick, without edge markings. The myxospore measurements were 10.7 ± 0.14 (10–11.5) μm long, 9 ± 0.15 (8–10) μm wide and 6.2 ± 0.7 (5.6–7.2) μm thick. The two ovoid polar capsules were equal in size, converging and opening together at the anterior end, measuring 5 ± 0.07 (4.3–6.0) μm long and 2.7 ± 0.07 (2.2–3.0) μm wide. Polar filaments were coiled from 5 to 7 turns. Histopathological analysis revealed no inflammatory reaction associated with the infection. A BLAST search found that the newly obtained 18 rDNA sequence had a low sequence similarity with available sequences for Myxobolus on GenBank. A phylogenetical analysis based on ribosomal DNA partial sequences showed that M. opsaridiumi sp. nov. is closely associated with several species of Myxobolus infecting cyprinid fish.

scholarly journals Myxobolus infection in the cornea of the roach (Rutilus rutilus) in Lake Balaton

2018 ◽  
Vol 66 (2) ◽  
pp. 250-257 ◽  
Author(s):  
Réka Borzák ◽  
Kálmán Molnár ◽  
Gábor Cech ◽  
Csaba Székely
Keyword(s):  
Connective Tissue ◽  
18S Rdna ◽  
Rutilus Rutilus ◽  
Gill Arch ◽  
Site Preference ◽  
Lake Balaton ◽  
Roach Rutilus Rutilus ◽  
Dense Connective Tissue ◽  
Rdna Sequences ◽  
18S Rdna Sequences

Infection of the cornea in fishes by Myxobolus plasmodia is a common but still little known site preference of myxosporeans. A sporadic but striking infection in the cornea of the roach (Rutilus rutilus) was observed in Lake Balaton, Hungary. Relatively small, round plasmodia 250 to 500 μm in diameter developed in the dense connective tissue of the cornea. Morphological and molecular biological examination of spores collected from cysts in the cornea demonstrated that this infection is caused by Myxobolus fundamentalis, a species hitherto reported only from the cartilaginous gill arch of the roach. The 18S rDNA sequences of spores from the cornea showed 99.9% identity to the sequences of spores from the gill arch, and they also shared 99.9% identity with the sequences of triactinomyxon actinospores obtained from the oligochaete Isochaetides michaelseni.

scholarly journals SEASONAL CHANGES IN THE MICROSTRUCTURE OF EARLY STAGES OF OOGENESIS IN THE COMMON CARP (CYPRINUS CARPIO LINNAEUS, 1758) AND THE CASPIAN ROACH (RUTILUS RUTILUS CASPICUS JAKOWLEW, 1870) IN THE WEST COAST OF THE CASPIAN SEA

2019 ◽  
pp. 19-27
Author(s):  
Ziyatdin Magomedzagirovich KURBANOV ◽  
Umshanat Dzhamaldinovna ZURKHAEVA ◽  
Ruslan Magomedovich BARKHALOV
Keyword(s):  
Common Carp ◽  
Germ Cells ◽  
Seasonal Changes ◽  
Microstructural Analysis ◽  
Rutilus Rutilus ◽  
Early Spring ◽  
The Caspian Sea ◽  
Roach Rutilus Rutilus ◽  
The Common ◽  
Caspian Roach

The work presents microstructural analysis of the oocytes of the common carp and the caspian roach that are on the stages of the protoplasmic and trophoplasmic (large) growth of the germ cells. Seasonal changes of quantitative and qualitative transformations of structural components of oocytes are also given. It is shown that from the early spring to the late autumn in the ovaries of the caspian roach and the common carp found are the oocytes of different generations, which are both at the generative and vegetative stages of growth of germ cells and along with this can occur, with varying intensity, resorption of whole oocytes and their individual structures. It has been established that spawning is common in the common carp, generative and regenerative processes occur simultaneously, while in the wobble spawning is simultaneous, the generative processes begin only after the regeneration of the sexual gland.

ANALYSIS OF SOME MORPHOMETRIC AND BIOLOGICAL INDICATORS OF ROACH RUTILUS RUTILUS (LINNAEUS, 1758)

2018 ◽  
pp. 27-34
Author(s):  
Gleb Igorevich Volosnikov ◽  
Elizaveta L'vovna Liberman
Keyword(s):  
Weight Gain ◽  
Age Groups ◽  
Rutilus Rutilus ◽  
Biological Indicators ◽  
Aral Sea ◽  
Compression Method ◽  
Roach Rutilus Rutilus ◽  
Opisthorchis Felineus ◽  
Aral Sea Basin ◽  
The Common

The common roach is a widespread and semi-anadromous fish inhabiting the waters of Europe, Siberia, the Aral Sea basin. Control catches contained roach with a commercial length 12.6-32.6 cm, with a total mass of 41-543 g, age varying within 1+ - 6+. Juvenile stage individuals made - 5.7%, females - 68.6%, males - 25.7%. The annual gain at the age 1+ - 2+ made 3.8 cm, from 2+ to 3+ = 0.6 cm, from 3+ to 4+ = 2.3 cm, from 4+ to 5+ = 2.5 cm, 5+ - 6+ = 2.3 cm. The rate of linear gain decreases from 2+ and equals 3.2%, from 3+ to 4+ = 11.8%, from 4+ to 5+ = 11.5%, from 5+ to 6 + = 9.5%. The annual gain in body weight of species aged from 1+ to 2+ was 50.8 g, from 3+ was 24.8 g, from 4+ = 79.5 g, from 5+ and 6 + = 112.2 and 23.3 g, respectively. From 2+ to 3+ the weight gain is 17.3%, compared to individuals from 1+ to 2+ (85.1%). In the age categories from 3+ to 4+ and 4+ to 5 +, the weight gain was 47.2% and 45.3%, from 5+ to 6+ = 6.5%. In this study, the roach was prevalent in the II and V stages of gonad maturity. Individuals with I and II degrees of fat content were found in all age groups. The study of roach muscles using the compression method revealed the invasion by Opisthorchis felineus (Rivolta, 1884) and Metorchis bilis (Braun, 1790). Invasion extensiveness of O pisthorchis felineus was 28.6%, of Metorchis bilis - 5.7%, combined infestation with two parasites - 2.8%. Invasion activity in opisthorchis was 15.1 specimens, in metorchis - 5.3 specimens, copiousness index made 4.7 and 0.5 copies, respectively.

The linear growth of roach infected with Ligula Intestinalis plerocercoids in the Chivyrkuysky Bay of the lake Baikal

2016 ◽  
Vol 3 (3) ◽  
pp. 312-318
Author(s):  
Дугаров ◽  
Zh. Dugarov ◽  
Ринчинов ◽  
Z. Rinchinov
Keyword(s):  
Body Length ◽  
Lake Baikal ◽  
Linear Growth ◽  
Age Groups ◽  
Rutilus Rutilus ◽  
Time Interval ◽  
Age Classes ◽  
Infection Level ◽  
Roach Rutilus Rutilus ◽  
Ligula Intestinalis

Objective of research: The purpose of the study is to investigate the influence of Ligula intestinalis plerocercoids on linear growth of roach Rutilus rutilus in the Chivyrkuysky bay of the lake Baikal. Materials and methods. Roach was caught on a permanent station in the Monakhovo creek of Chivyrkuysky bay of the lake Baikal at the same time interval (June 25-July 5) in 1997-2005. The analysis of roach infection with L. intestinalis plerocercoids was performed based on incomplete parasitological dissections of 807 host specimens at the age of 0+ to 10+. Standard body length (the distance from the tip of the snout to the anterior end of the caudal fin) was used to characterize the linear growth of roach. Results and discussion. L. intestinalis plerocercoids wasn’t found out in underyearlings (0+) of roach. The host began to be infected with this tapeworm at the age of 1+. The maximum infection level with L. intestinalis plerocercoids was observed in roach at the age of 3+. That one was significantly reduced in the age of 4+. The infection level of roach with L. intestinalis continued to decrease in the next age groups, going down to a minimum at the age of 7+. The roach wasn’t infected with this tapeworm at the age of 8+–10+. A significant reduction of the infection level in the roach in the age classes 4+ and older after the maximum at the age of 3+ was probably associated with parasite-induced mortality of the host during the growth of the age group 3+ to 4+. A standard body length of roach specimens infected with L. intestinalis at the age of 1+ and 2+ was greater than that of uninfected ones. In contrast, the standard body length of the roach specimens infected with this tapeworm was less than that of uninfected ones in subsequent age classes (3 + -6 +). Differences of standard body length between roach specimens infected with L. intestinalis and uninfected ones were statistically significant in the above-mentioned age groups (1 + 6 +). The effect of L. intestinalis plerocercoids on the linear growth of the roach in Chivyrkuysky Bay of the lake Baikal was manifested in an increase of body length of infected host specimens compared to uninfected ones in young age groups (1+ and 2+) and, vice versa, in one’s decrease in age groups 3+–6 +. We proposed to call this effect “reversive”.

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