scholarly journals Infection of Predatory Fish with Larvae of Eustrongylides excisus (Nematoda, Dioctophymatidae) in the Delta of the Dnipro River and the Dnipro-Buh Estuary in Southern Ukraine

2018 ◽  
Vol 52 (2) ◽  
pp. 137-144 ◽  
Author(s):  
S. L. Goncharov ◽  
N. M. Soroka ◽  
I. Y. Pashkevich ◽  
A. I. Dubovyi ◽  
A. O. Bondar

Abstract The article describes occurrence and distribution of Eustrongylides trematodes in fish in the waters of the Dnipro-Buh estuary and the delta of Dnipro River in Mykolaiv and Kherson Region. Study was conducted in 2015–2016. This parasite was found in natural water reservoirs in Mykolaiv and Kherson region in following fish species: Sander lucioperca (Linnaeus, 1758), Perca fluviatilis (Linnaeus, 1758) and Esox lucius (Linnaeus, 1758). Ichtyopathological investigation of 346 fishes was conducted. Parasites were observed in abdominal cavity, muscle tissue, wall of gastro-intestinal tract, gonads and hepatopancreas. P. fluviatilis was the most affected species, prevalence of infection was 85.1 %. Less infected were S. lucioperca and E. lucius, with the prevalence of infection 58.1 % and 58.9 % respectively. Mean prevalence of infection of predatory fish in studied reservoirs was 70.5 %. The intensity of infection was the highest in perch (1–14 nematodes per fish). The lowest intensity of infection was found in pike-perch (1–9 nematodes per fish).

Author(s):  
Nikolay Aleksandrovich Pudovkin ◽  
Peter Vladimirovich Smutnev

The authors of the article have studied the content of the elements of anti-oxidant system (malondialdehyde, catalase, selenium) in tissues of the internal organs (gills, intestine, muscles, liver, swimbladder, scales) in some species of predatory fish (pike Esox lucius (L., 1758), perch Perca fluviatilis (L., 1758), pike-perch Sander lucioperca (L., 1758), catfish Silurus glanis ) widespread in the basin of the Volga river in the Saratov region. The lowest concentration of malondialdehyde in organisms of the studied fish species is observed in fall and winter; the highest - in spring and summer. Catalase activity in gills tissue of a pike raised in 11.8%, cat-fish - 9.1%, pike-perch - 7.5%, perch - 7.8%. In fall (compared to winter) enzyme activity lowering in gonads of pike-perch makes 16.3%, in gonads of perch - 14.4%. In other tissues there were not observed any evident changes of catalase activity. Fish species under consideration are listed according to the average value of selenium concentration in organisms, µg/g: pike (0.208) > catfish (0.207) > pike-perch (0.196) > perch (0.178). According to the average value of the selenium accumulation in the body in different season all the studied species can be placed in the following order, µg/g: winter-pike (0.132) > pike-perch (0.136) > perch and catfish (0.142); spring - pike-perch (0.190) > perch (0.191) > pike (0.208) > catfish (0.209); summer - perch (0.186) > pike-perch (0.190) > catfish and pike (0.203); autumn - perch (0.193) > pike-perch (0.268) > > catfish (0.274) > pike (0.289).


2008 ◽  
Vol 45 (4) ◽  
pp. 196-203 ◽  
Author(s):  
J. Morozinska-Gogol

AbstractThe present paper summarized data on parasites of percid fishes (Actinopterygii: Percidae), such as pike-perch, European perch and ruffe from estuaries of the Polish coastal zone are listed, based on published records and long-term surveys carried out by the author. Parasites are listed alphabetically, separately for each host and for each parasite group with notes on their location on the host and geographical distribution (with references). A total of 41 species (taxa) of parasites were recorded on pike-perch Sander lucioperca (6 Ciliophora, 1 Myxozoa, 1 Monogenea, 11 Digenea, 4 Cestoda, 6 Nematoda, 5 Acanthocephala, 1 Mollusca, 1 Hirudinea, 4 Copepoda and 1 Branchiura). European perch, Perca fluviatilis, harboured 60 parasites (6 Ciliophora, 4 Myxozoa, 1 Monogenea, 18 Digenea, 9 Cestoda, 10 Nematoda, 5 Acanthocephala, 1 Mollusca, 1 Hirudinea, 4 Copepoda and 1 Branchiura). Ruffe Gymnocephalus cernuus featured 43 parasites (1 Microsporidia, 7 Ciliophora, 3 Myxozoa, 1 Monogenea, 13 Digenea, 5 Cestoda, 8 Nematoda, 2 Acanthocephala, 1 Mollusca and 2 Copepoda).


2014 ◽  
Vol 58 (2) ◽  
pp. 223-227 ◽  
Author(s):  
Aleksander W. Demiaszkiewicz ◽  
Jacek Lachowicz ◽  
Izabela Kuligowska ◽  
Anna M. Pyziel ◽  
Grzegorz Bełżecki ◽  
...  

Abstract Parasitological examination after necropsies of 48 European beavers from Podlaskie and Warmisko-Mazurskie provinces were performed between April 2011 and November 2012. All helminthes were isolated from the contents of the gastro-intestinal tract and their species were determined. In addition, blood samples and faeces were examined. All beavers were infected with six species of parasites. Stichorchis subtriqetrus trematodes were found in 93.7% of animals. They were localized mainly in the caecum, less in the colon, and single juvenile parasites were found in the small intestine. The intensity of infection ranged from two to 893 parasites. Travassosius rufus nematodes (10-4336 specimens) were present in the stomach of 68.7% of the beavers. In the small intestine of four (8.3%) beavers, two-six specimens of Psilotrema castoris were found. This is the first record of this species in Poland and the third of its discovery in the world. Furthermore, in the small intestine of one beaver, two Trichostrongylus capricola nematodes were detected. In the liver of one beaver, pathological changes caused by hydatid cestode Echinococus granulosus occurred. Inflammatory changes of the gastric mucosa caused by Travassosius rufus and of caecum caused by Stichorchis subtriquertus, were observed. Coproscopy was performed with the use of Baermann, flotation, and decantation methods. All results of Baermann method were negative. Examinations with flotation and decantation methods confirmed necropsy findings. Using the flotation method, single oocysts of Eimeria sprehni in one beaver were detected. A blood test conducted by Kingston and Morton method did not reveal the presence of protozoa or microfilariae.


Fisheries ◽  
2020 ◽  
Vol 2020 (6) ◽  
pp. 102-107
Author(s):  
Viktoriya Khorosheltseva ◽  
Anna Poluyan ◽  
Elena Gorbenko ◽  
Anna Pavlyuk ◽  
Maria Grinchenko

This paper proposes a method of oral administration of drugs to predatory fish species using the example of common pike perch. The study was carried out on 26 specimens of pike perch breeders who received various injuries as a result of spawning, as a result of which ulcerative lesions appeared on the surface of the fish body with the threat of secondary infection. The behavioral responses of the fish were suppressed. To improve the condition of manufacturers, we used: therapeutic baths ("Antibacterial 500"); feeding with a probiotic preparation (bacteria Bacillus subtilis strain DSM 32424); treatment of external damage (povidone-iodine). The complex application of these drugs has shown a positive therapeutic effect in the recovery of pike perch breeders. The survival rate was 80.8%.


2018 ◽  
Vol 8 (1) ◽  
pp. 69-75
Author(s):  
R. R. Ishtukov ◽  
M. A. Nartailakov ◽  
V. S. Panteleev ◽  
V. V. Rezyapov

Introduction. One of the worst complication of different surgical diseases of abdominal cavity organs and of performed, on that regard, operational interventions, are intestinal festulas including without limitation deodenum fistulas. Longterm experience of surgical treatment of patients with unformed duodenal and high enteric fistulas show that it is feasible to have a clear surgical tactics with account of location level and type of fistulas, their quantity, volume of sarcous reduction, peritonitis and multi-organ failure syndrome. In this regard, the objective of this research is to find optimal surgical tactics and to determine the most effective method of treating duodenum fistulas of various causation.Materials and methods. Experimental work was carried out under conditions of experimentally formed intestinal fistula in rabbits of “Shinshilla” breed. After formation of fistula the animals were divided into 3 groups based on the method of removing artificially installed duodenal fistula: sealing through Albert — Schmieden — Lembert suture without fastening of suture line; sealing through fastening of intestinal suture with biological surgical glue; sealing through fastening with swine dermal collagen. Mechanical constancy of the sutures was measured with pneumocompression of sealed intestinal tract areas as well as with morphological study of surgical wound edges.Results. The results of histological study show that experiments with application of bio-implant demonstrated less vascular congestion and interstitial swelling. Phologistic infiltration also responded more efficiently both quantitatively (manifestation rate) and qualitatively (quick change of cell elements) in the group that used bio-implant.Conclusion. Results of morphological studies and pneumocompression data under modelling of duodenal fistulas in experimental animals show that application of bio-implant helps to earlier restore microcirculatory abnormality. 


2014 ◽  
Vol 9 (3) ◽  
pp. 196-204 ◽  
Author(s):  
Lucia Montenegro ◽  
Giuseppe Losurdo ◽  
Raffaele Licinio ◽  
Maria Zamparella ◽  
Floriana Giorgio ◽  
...  

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1799
Author(s):  
Michaela Schafberg ◽  
Karin Loest ◽  
Andreas Müller-Belecke ◽  
Sascha Rohn

In the last decades, several plant-based materials were used for the substitution of fish meal and oil in aquaculture. The present study evaluated the fish quality and the sensory differences of rainbow trout (Oncorhynchus mykiss) and pike-perch (Sander lucioperca) from three different feeding groups, which were fed a commercially available industrial (standard) diet, a control diet, and a special microorganism-based feed mix. This feed mainly consisted of a mix made of Rhodotorula glutinis, Crypthecodinium cohnii, and Arthrospira sp. and had 50% less fish meal and fish oil compared to typical control diets. At the beginning, the pike-perch population was six months old, and the rainbow trout population was 15 months old. The feeding study duration was 16 weeks and every four weeks the growth performance and several morphometric parameters were recorded. Afterwards, sensory evaluation took place to identify possible trends. Sensory evaluation revealed that the rainbow trout groups did not show any significant differences to the standard and control fish fillets with regard to odor, texture, and taste. The effects on rainbow trout growth performances and carcass parameters were similar to the standard group. The feed mix was not optimal for pike-perch farming, which was also reflected by significantly adversely affected growth performance and carcass parameters. The sensorial evaluation showed an opposite trend: here, only small differences in the fillets from the feed mix and standard/control diet were observed.


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