scholarly journals Sperm Cryopreservation of Two European Predator Fish Species, the Pikeperch (Sander lucioperca) and the Wels Catfish (Silurus glanis)

10.5772/28479 ◽  
2012 ◽  
Author(s):  
Zoltn Bokor ◽  
Bla Urbnyi ◽  
Lszl Horvth ◽  
Tams Mller ◽  
kos Horvth
Keyword(s):  
Fish Species ◽  
Sperm Cryopreservation ◽  
Sander Lucioperca ◽  
Silurus Glanis

CHARACTERISTICS OF FREE-RADICAL PROCESSES IN THE ORGANISMS OF SOME PREDATORY FISH SPECIES IN DIFFERENT SEASONS OF THE YEAR

2017 ◽  
pp. 117-123
Author(s):  
Nikolay Aleksandrovich Pudovkin ◽  
Peter Vladimirovich Smutnev
Keyword(s):  
Fish Species ◽  
Catalase Activity ◽  
Perca Fluviatilis ◽  
Selenium Concentration ◽  
The Body ◽  
Predatory Fish ◽  
Volga River ◽  
Silurus Glanis ◽  
Average Value ◽  
Pike Perch

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).

scholarly journals A nitrogen factor for European pike-perch (Sander lucioperca), northern pike (Esox lucius), and sheatfish (Silurus glanis) fillets

2021 ◽  
Vol 51 (2) ◽  
pp. 119-129
Author(s):  
Alena Honzlova ◽  
Helena Curdova ◽  
Lenka Schebestova ◽  
Alzbeta Stara ◽  
Josef Priborsky ◽  
...  
Keyword(s):  
Dry Matter ◽  
Northern Pike ◽  
Esox Lucius ◽  
Sander Lucioperca ◽  
Fish Products ◽  
Silurus Glanis ◽  
Eu Legislation ◽  
Meat Content ◽  
Pike Perch ◽  
Marine Products

Measures for consumer protection against food adulteration and misleading labeling are integrated into EU legislation, including methods for detection of misleading practices. Verification of meat content is available for marine products but not for freshwater fish because of the lack of standard nitrogen factors. The aim of this study was to establish nitrogen factors for European pike-perch Sander lucioperca (Linnaeus, 1758), northern pike Esox lucius Linnaeus, 1758, and sheatfish Silurus glanis Linnaeus, 1758. The study involved analysis of 808 fillet samples obtained in spring (March–April) and autumn (October–November) harvest seasons, 2018–2019, from seven Czech Republic fish rearing facilities. Samples with and without skin were analyzed for nitrogen content, dry matter, protein, ash, and fat according to established ISO methods. The recommended nitrogen factor for European pike-perch with the skin is 3.28 ± 0.09 and without the skin is 3.21 ± 0.09; for northern pike with the skin is 3.18 ± 0.09 and without skin is 3.15 ± 0.09; and for sheatfish with skin is 2.73 ± 0.13 and without skin is 2.75 ± 0.12. The established nitrogen factors will enable analysis of meat content to ensure that consumers are purchasing correctly described and labeled fish products.

scholarly journals Dynamics of the habitat use of three predatory freshwater fish in a lentic ecosystem

2021 ◽  
Author(s):  
Milan Riha ◽  
Ruben Rabaneda-Bueno ◽  
Ivan Jaric ◽  
Allan T. Souza ◽  
Lukas Vejrik ◽  
...  
Keyword(s):  
Habitat Use ◽  
Warm Season ◽  
Cold Season ◽  
Vertical Movement ◽  
Early Spring ◽  
Sander Lucioperca ◽  
Silurus Glanis ◽  
Římov Reservoir ◽  
Multiple Species ◽  
Predator Community

To understand the conditions of coexistence in multiple-species predator community, we studied longitudinal and vertical movement of pike (Esox lucius), pikeperch (Sander lucioperca) and catfish (Silurus glanis) in the Rimov Reservoir, using an autonomous telemetry system for 11 months. We found significant differences among these three species in movement and depth that varied considerably in time, with the greatest differences between warm (late spring and early autumn) and cold season (late autumn to early spring). Preference for different sections of the reservoir was stable for pike, while pikeperch and catfish frequently visited tributary during the warm season, and moved closer to the dam during the cold season. Pike longitudinal activity was highest in the cold season, pikeperch in the warm season, and catfish activity peaked in both the warm and cold seasons. Overlap in the depth used among species was higher in the warm season, when all species used the upper layer of the water column, and lower in cold season, when pikeperch and catfish used deeper areas. These results demonstrated ability of predators to actively inspect a large portion of the reservoir in both longitudinal and vertical dimensions, although differing in the timing of their habitat use and activity.

scholarly journals Length-weight relationships of six freshwater fish species from Lake Kirkkojärvi, Finland

2017 ◽  
Vol 75 (4) ◽  
pp. 156-159 ◽  
Author(s):  
José Gama ◽  
Maria Nyberg
Keyword(s):  
Fish Species ◽  
Goodness Of Fit ◽  
Perca Fluviatilis ◽  
Rutilus Rutilus ◽  
Specimen Size ◽  
Photographic Method ◽  
Sander Lucioperca ◽  
Gill Net ◽  
Length Measurements ◽  
Lower Limits

Abstract Length-weight relationships (LWRs) and length-length relationships (LLRs) were determined for six fish species: Alburnus alburnus, Blicca bjoerkna, Gymnocephalus cernua, Perca fluviatilis, Rutilus rutilus and Sander lucioperca caught using a Nordic multi-mesh gill net in Lake Kirkkojärvi in Southwestern Finland in August 2015. The measurements were done using a photographic method and the dataset is available on the Comprehensive R Archive Network (CRAN). The dataset was done with a scientific catch, which showed lower limits on specimen size than the ones from fisheries. The LWRs were calculated for the total length (TL) and found to be consistent with models from Finland. The length measurements were taken to the nearest 0.01 cm, which also allowed for juveniles to be represented in the model. The goodness of fit of the models is high, with the coefficients of determination above 95%. This study is the first one to estimate LWRs of fish species for this hypereutrophic lake, and is useful for fishery managers and biologists.

scholarly journals Analysis of Heavy Metals Concentration in Tissues of Three Different Fish Species Included in Human Diet from Danube River

2016 ◽  
Vol 66 (1) ◽  
pp. 89-102 ◽  
Author(s):  
Đ. Raša Milanov ◽  
P. Milena Krstić ◽  
V. Radmila Marković ◽  
A. Dragoljub Jovanović ◽  
M. Branislav Baltić ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Digestive Tract ◽  
Fish Species ◽  
Cyprinus Carpio ◽  
Water Samples ◽  
Silver Carp ◽  
Danube River ◽  
Hypophthalmichthys Molitrix ◽  
Silurus Glanis ◽  
Fish Samples

AbstractThe aim of this study was the investigation of water, sediments and fish tissues contamination with heavy metals. All samples were taken from the Danube River in Belgrade region, a location upstream from Batajnica. Concentrations of Cd, Hg and Pb in water samples were not detected, while concentrations of Zn, Fe, Cu and As were in the range of 0.004 - 0.330 mg L-1. Iron was the most deposited metal in sediment samples in contrast to water samples where all investigated metals were detected. For the purpose of heavy metals determination in fresh fish tissue, fifteen samples of three different fish species, silver carp (Hypophthalmichthys molitrix), common carp (Cyprinus carpio) and wels catfish (Silurus glanis) were collected. Concentrations of Pb, Cd, As and Hg were determined in the digestive tract, liver and muscle by absorption spectroscopy. The highest concentration of Pb was in the digestive tract in all three fish species, ranging from 0.036 to 1.518 μg g-1, while Cd was mostly deposited in the liver. Concentrations of As were in the range of 0.36 - 0.73 μg g-1in Hypophthalmichthys molitrix, 0.013 - 0.18 μg g-1in Cyprinus carpio and 0.003 - 0.005 μg g-1in Silurus glanis tissues, while the content of Hg was equal in all tested tissues of carp. Concentrations of all metals were found to be present in the fish samples at different levels, but these values are under the maximum residual levels prescribed by the European Union (EU) and the maximum allowed concentrations (MAC) for Serbia, so the fish meat is acceptable for the human consumption.

scholarly journals Production of monoclonal antibodies against immunoglobulin heavy chain in common carp (Cyprinus carpio L.)

2012 ◽  
Vol 51 (No. 5) ◽  
pp. 296-302 ◽  
Author(s):  
T. Vesely ◽  
S. Reschova ◽  
D. Pokorova ◽  
J. Hulova ◽  
Z. Nevorankova
Keyword(s):  
Monoclonal Antibody ◽  
Monoclonal Antibodies ◽  
Common Carp ◽  
Fish Species ◽  
Heavy Chain ◽  
Cross Reactivity ◽  
Bighead Carp ◽  
Silurus Glanis ◽  
Goldfish Carassius Auratus ◽  
Positive Results

A method for purification of carp serum immunoglobulin (IgM), intended for the production of monoclonal antibodies, was described in the present study. Hybridomas that produce antibodies against IgM heavy chain were selected by ELISA method and Western blotting. Ascitic fluids were prepared and tested by the above mentioned methods, and their typing followed. Monoclonal antibody with the highest titre of antibodies against carp immunoglobulin was selected for conjugation with horseradish peroxidase. Specificity of conjugated monoclonal antibody was tested in a panel of various fish species sera. Cross-reactivity was not detected in rainbow trout (Oncorhynchus mykiss) and eleven other fish species. Besides common carp, positive results were also found in goldfish (Carassius auratus) and bighead carp (Aristichthys nobilis), that are members of Cyprinidae family. Among fish other than Cyprinidae, positive results were also detected in sheatfish (Silurus glanis). The sensitivity in common carp was approximately 10 ng/ml.

Sign in / Sign up

Export Citation Format

Share Document