scholarly journals HEMATOLOGICAL PARAMETERS AND PARASITE FAUNA OF AMUR SLEEPER PERCCOTTUS GLENII IN A SINGLE-SPECIES ICHTHYOCENOSIS OF A SMALL URBAN RESVOIR

2020 ◽  
pp. 227-235
Author(s):  
T. A. Sheina ◽  
◽  
N. V. Kostitsyna ◽  
M. A. Baklanov ◽  
◽  
...  
Keyword(s):  
Hematological Parameters ◽  
Single Species ◽  
Well Being ◽  
Infected Fish ◽  
Parasite Fauna ◽  
Amur Sleeper ◽  
Perccottus Glenii ◽  
Large Numbers ◽  
Fish Blood ◽  
Nippotaenia Mogurndae

The article presents the results of hematological and parasitological studies of Amur sleeper Perccottus glenii of a small reservoir of artificial origin located in the vicinity of Perm. In this reservoir, Amur sleep-er is the only representative of the ichthyofauna. The collection of material was carried out in the spring-summer period of 2019. A total of 55 specimens of Amur sleeper were studied (30 specimens on May 8 and 25 specimens on July 12). Significant differences were found in the majority of quantitative indicators of fish blood cells in the spring and summer periods: in summer, the number of hematopoietic cells is higher (except for lymphocytes and monocytes), and in general, the content of mature leukocytes in the blood microliter in summer is lower. The parasite fauna of Amur sleeper in the studied reservoir is ex-tremely impoverished and is represented by the infusoria Trichodina nigra, cestode Nippotaenia mogurndae and nematodes, the latter were not recorded in Amur sleeper in this reservoir previously. The relationship between hematological parameters and the extent of parasite invasion was revealed: in more infected fish the number of immature erythrocytes, protoleukocytes, as well as neutrophils and eosinophils is significantly higher. The large numbers of Amur sleeper in the studied reservoir, the absence of devel-opmental anomalies in all the studied specimens, and the low proportion of fish with blood cell patholo-gies indicate the relative well-being of the studied part of the Amur sleeper population.

scholarly journals Parasitic infections of two invasive fish species, the Caucasian dwarf goby and the Amur sleeper, in Hungary

2015 ◽  
Vol 63 (4) ◽  
pp. 472-484 ◽  
Author(s):  
László Antal ◽  
Csaba Székely ◽  
Kálmán Molnár
Keyword(s):  
Fish Species ◽  
Parasite Species ◽  
Fish Fauna ◽  
Parasite Fauna ◽  
Parasitic Infections ◽  
Amur Sleeper ◽  
Perccottus Glenii ◽  
Invasive Fish ◽  
Nippotaenia Mogurndae ◽  
New Fish Species

In recent years and decades, two new fish species, the Caucasian dwarf goby (Knipowitschia caucasica) and the Amur sleeper (Perccottus glenii) have become members of the Hungarian fish fauna. In a 14-month study on the parasite fauna of these species, the authors detected 11 parasite species in the Caucasian dwarf goby and 17 species in the Amur sleeper. All parasites found in dwarf goby belong to species commonly occurring also in native Hungarian fishes, but three species (Goussia obstinata, Gyrodactylus perccotti and Nippotaenia mogurndae) collected from the Amur sleeper are introduced species new for the Hungarian fauna.

scholarly journals Introduction of Gyrodactylus perccotti (Monogenea) into Europe on its invasive fish host, Amur sleeper (Perccottus glenii, Dybowski 1877)

2012 ◽  
Vol 49 (1) ◽  
pp. 21-26 ◽  
Author(s):  
M. Ondračková ◽  
I. Matějusová ◽  
J. Grabowska
Keyword(s):  
Single Species ◽  
Fish Host ◽  
Amur Sleeper ◽  
Perccottus Glenii ◽  
Morphological Similarity ◽  
Native Range ◽  
Invasive Fish ◽  
Intensity Of Infection ◽  
Amur River ◽  
First Time

AbstractMonogenean parasites of Amur sleeper Perccottus glenii introduced to Europe during the last century were studied during two seasons in the Wloclawski Reservoir (Poland). Introduction of a single species Gyrodactylus perccotti with its host was confirmed in both seasons: autumn 2006 and spring 2008. Occurrence of G. perccotti in Europe was reported for the first time. Intensity of infection decreased from 2006 to 2008, but the prevalence did not differ between the seasons. G. perccotti sampled in autumn 2006 showed low morphometrical variability and high morphological similarity with parasites collected in host native range, Amur River. In contrary, high morphological and metrical variability was found within the samples collected in spring 2008. Nucleic acid sequencing of the partial ITS rDNA confirmed that despite the variation in morphology or size of haptoral hard parts, all studied Gyrodactylus specimens belonged to the same species (G. percotti) and no intraspecific variation was detected.

scholarly journals Morphological and hematological studies of Trypanosoma spp. infecting ornamental armored catfish from Guamá River-PA, Brazil

2013 ◽  
Vol 85 (3) ◽  
pp. 1149-1156 ◽  
Author(s):  
Rodrigo Y. Fujimoto ◽  
Mikaelle S. Neves ◽  
Ruda F.B. Santos ◽  
Natalino C. Souza ◽  
Marcia V.S. do Couto ◽  
...  
Keyword(s):  
Fish Species ◽  
Hematological Parameters ◽  
Infected Fish ◽  
Ornamental Fish ◽  
The Other ◽  
Infection Prevalence ◽  
Hematological Response ◽  
Morphometric Characterization

A total of 281 specimens of freshwater armored ornamental fish species (Leporacanthicus galaxias, Lasiancistrus saetiger, Cochliodon sp., Hypostomus sp., Pseudacanthicus spinosus, Ancistrus sp. and Rineloricaria cf. lanceolata) were captured at the hydrological basin of Guamá River, Pará, Brazil. The infection by Trypanosoma spp. was inspected. The morphological and morphometric characterization of the parasites and the hematological parameters were determined. Leporacanthicus galaxias and Pseudacanthicus spinosus presented 100% infection prevalence, and the other species showed a variable prevalence of infection. The parasites showed clearly different morphotypes and dimensions, and probably belong to different species. The hematological response to the infection varied with the host. Cochliodon sp. showed no differences between infected and not infected fish. In other species several modifications on some hematological parameters were found, but apparently without causing disease. It is emphasized the possibility of introduction of the parasites in new environments due to the artificial movements of these ornamental fish.

Levels of infection of gastric nematodes in a flock of great cormorants (Phalacrocorax carbo) from Lake Biwa, Japan

2011 ◽  
Vol 86 (1) ◽  
pp. 54-63 ◽  
Author(s):  
Kh.M. El-Dakhly ◽  
E. El-Nahass ◽  
S. Uni ◽  
H. Tuji ◽  
H. Sakai ◽  
...  
Keyword(s):  
Lake Biwa ◽  
Single Species ◽  
Phalacrocorax Carbo ◽  
Connective Tissues ◽  
Inflammatory Reactions ◽  
Large Numbers ◽  
Mucosal Surfaces ◽  
Contracaecum Rudolphii ◽  
High Prevalence ◽  
Great Cormorants

AbstractA high prevalence (86.7%) of various species of nematodes was observed in the stomach of great cormorants living in Lake Biwa, Japan. There were varying numbers of adults belonging to two common genera, Eustrongylides Jagerskiold 1909 (Nematoda: Dioctophymatidae) and Contracaecum Railliet & Henry 1912 (Nematoda: Anisakidae). The first included common adenophorean nematodes comprising a single species, Eustrongylides tubifex and the second comprised ascaroid nematodes that contained four named species: Contracaecum rudolphii Hartwich, 1964, Contracaecum microcephalum Yamaguti, 1961, Contracaecum multipapillatum Drasche, 1882 and Contracaecum chubutensis Garbin, 2008. After the prevalence and intensity of the infection had been noted, both types of nematodes were frequently observed to penetrate the mucosa and intrude into the wall of the glandular stomach, where they caused gross haemorrhage and ulceration. The Eustrongylides sp. was predominantly found in a nodular lesion of the proventricular wall, while Contracaecum spp. were observed either free in the lumen of the proventriculus or, on occasion, deeply penetrating its wall. Of the Contracaecum spp., C. rudolphii was the most prevalent. Grossly, large numbers of nematodes were present in infected stomachs (for C. rudolphii intensity was 1–34 and 3–57 nematodes in male birds and 1–21 and 1–32 in females; for C. microcephalum 1–2 and 1 in male birds and 1–2 in females; for C. multipapillatum 2 in male cormorants and no infection in females; for C. chubutensis 1–2 and 1 in male birds and 1–5 and 1 in females and for E. tubifex 1–5 nematodes in male birds and 2–8 in females). Ulcerative inflammation and hyperaemia were the most common pathological presentations, especially in areas that had been invaded by parasites. Microscopically, varying degrees of granulomatous inflammatory reactions were seen, in addition to degenerated nematodes which appeared to have deeply penetrated mucosal surfaces and were surrounded by fibrous connective tissues.

scholarly journals Carbohydrates in some marine planktonic animals

1960 ◽  
Vol 39 (2) ◽  
pp. 239-248 ◽  
Author(s):  
J. E. G. Raymont ◽  
S. Krishnaswamy
Keyword(s):  
Chemical Composition ◽  
Dry Weight ◽  
Single Species ◽  
Fat Content ◽  
Carbohydrate Content ◽  
High Protein ◽  
Calanus Finmarchicus ◽  
Large Numbers

There have been few analyses of the fat, protein and carbohydrate fractions in zooplankton, and owing to the difficulty of sorting large numbers of single species, the majority of the earlier determinations were necessarily carried out on mixed zooplankton hauls (Brandt, 1898; Brandt & Raben, 1919; Moberg, 1926; Wimpenny, 1929; Drummond & Gunther, 1934; Vinogradov, 1953). Most of these analyses suggested a relatively high protein and fat content, and this was confirmed by Orr (1934 a), who investigated the chemical composition of a single species, Calanus finmarchicus. Orr's result gave fat, protein and chitin as 20–40,35–50 and 3%, respectively of dry weight. Similar high values were also reported by Orr (1934 b) for Euchaeta norvegica. The carbohydrate content was not, however, estimated in either of Orr's investigations since large numbers of animals would have been required. Brandt (1898), after analysing mixed plankton hauls which were predominantly copepods, suggested a carbohydrate content of ca. 20%.

scholarly journals Myxidium shedkoae Sokolov, 2013 (Myxozoa: Myxidiidae), a parasite of the gallbladder of Perccottus glenii Dybowski, 1877 (Actinoptrygii: Odontobutidae): Supplementary data on morphology and phylogenetic position based on 18s rDNA sequence analysis

2018 ◽  
Vol 66 (2) ◽  
pp. 258-268
Author(s):  
Sergey Sokolov ◽  
Daria Lebedeva
Keyword(s):  
Sequence Analysis ◽  
18S Rdna ◽  
Rdna Sequence ◽  
Phylogenetic Position ◽  
Amur Sleeper ◽  
Molecular Characterisation ◽  
Perccottus Glenii ◽  
Supplementary Data ◽  
18S Rdna Sequence ◽  
Partial 18S

This paper is the first report on the molecular characterisation of myxozoan parasites from the odontobutid fish Chinese (Amur) sleeper (Perccottus glenii Dybowski, 1877). The authors determined the partial 18S rDNA sequence of Myxidium shedkoae Sokolov, 2013 from the gallbladder of the fish. Phylogenies reconstructed using maximum likelihood and Bayesian inference analysis revealed that M. shedkoae belongs to the hepatic biliary group of myxozoans (after Kristmundsson and Freeman, 2013) as a member of the clade consisting of Zschokkella sp. KLT-2014, Myxidium truttae and Zschokkella nova. Some new morphological features of the parasite are also presented.

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