Impact of di-n-butyl phthalate on reproductive system development in European pikeperch (Sander lucioperca) von Jarmolowicz, S., Stanislaw Sakowicz Inland Fisheries Institute, Olsztyn (poland). Dept. of Aquaculture, Demska- Zakes, K., University of Warmia and Mazury, Olsztyn (Poland). Dept. of Ichtyology, Zakes, Z., Stanislaw Sakowicz Inland Fisheries Institute, Olsztyn (poland). Dept. of Aquaculture

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Effect of different dietary lipid levels on growth performance, slaughter yield, chemical composition, and histology of liver and intestine of pikeperch, Sander lucioperca von Kowalska, A, Zakes, Z, Jankowska, B, Demska-Zakes, K

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Effect of feeding frequency on growth and size variation in juvenile pikeperch, Sander lucioperca (L.) von Zakes, Z.(Stanislaw Sakowicz Inland Fisheries Inst., Olsztyn (Poland). Dept. of Aquaculture) E-mail:zakes@infish.com.pl, Kowalska, A.(Stanislaw Sakowicz Inland Fisheries Inst., Olsztyn (Poland). Dept. of Aquaculture), Czerniak, S.(Stanislaw Sakowicz Inland Fisheries Inst., Olsztyn (Poland). Dept. of Aquaculture), Demska-Zakes, K.(University of Warmia and Mazury, Olsztyn (Poland). Dept. of Ichthyology)

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Growth rate and reproduction of a brood stock of European whitefish (Coregonus lavaretus L.) from Lake Gaładuś under controlled rearing conditions von Szczepkowski, Mirosław (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Pieczarki 50, 11-610 Pozezdrze, Poland), Szczepkowska, Bożena (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Pieczarki 50, 11-610 Pozezdrze, Poland), Krzywosz, Tadeusz (Department of Lake Fisheries in Giżycko, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland), Wunderlich, Krzysztof (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Pieczarki 50, 11-610 Pozezdrze, Poland), Stabiński, Robert (Fisheries Enterprise of the Polish Angling Association in Suwałki, Poland)

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Impact of light intensity on the results of rearing juvenile pikeperch, Sander lucioperca (L.), in recirculating aquaculture systems von Kozłowski, Michał (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland Pieczarki 50, 11-610 Pozezdrze), Zakęś, Zdzisław (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland), Szczepkowski, Mirosław (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland Pieczarki 50, 11-610 Pozezdrze), Wunderlich, Krzysztof (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland Pieczarki 50, 11-610 Pozezdrze), Piotrowska, Iwona (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland Pieczarki 50, 11-610 Pozezdrze), Szczepkowska, Bożena (Department of Sturgeon Fish Breeding, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland Pieczarki 50, 11-610 Pozezdrze)

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Occurrence of juvenile salmon, Salmo salar L., from natural spawning in the Słupia River (northern Poland) von Bernaœ, Rafał (Department of Migratory Fish in Gdańsk, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Synów Pułku 37, 80-298 Gdańsk, Poland), Dębowski, Piotr (Department of Migratory Fish in Gdańsk, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Synów Pułku 37, 80-298 Gdańsk, Poland), Bartel, Ryszard (Department of Migratory Fish in Gdańsk, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Synów Pułku 37, 80-298 Gdańsk, Poland), Radtke, Grzegorz (Department of Migratory Fish in Gdańsk, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Synów Pułku 37, 80-298 Gdańsk, Poland), Miller, Marcin (Lower Słupia Landscape, Park, Poland), Skóra, Michał (Department of Migratory Fish in Gdańsk, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Synów Pułku 37, 80-298 Gdańsk, Poland)

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Effect of sex reversal in rainbow trout (Oncorhynchus mykiss Walbaum) using 17α-methyltestosterone and 11β-hydroxyandrostenedione von Kuzminski, Henryk (Department of Salmonid Research Rutki, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, 83-330 Żukowo, Poland), Dobosz, Stefan (Department of Salmonid Research Rutki, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, 83-330 Żukowo, Poland)

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Possibilities of using the length differentiation of hatchery sea trout, Salmo trutta m. trutta L., parr to predict numbers of one-year smolts von Dębowski, Piotr (Department of Migratory Fishes, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Synów Pułku 37, 80-298 Gdańsk, Poland), Dobosz, Stefan (Department of Salmonid Research, Rutki, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland), Grudniewska, Joanna (Department of Salmonid Research, Rutki, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland), Kuzmiński, Henryk (Department of Salmonid Research, Rutki, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Poland)

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Impact of intraperitoneal and intramuscular PIT tags on survival, growth, and tag retention in juvenile pikeperch, Sander lucioperca (L.) von Hopko, Marek (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Zakęś, Zdzisław (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Kowalska, Agata (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Partyka, Konrad (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland)

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Long-term changes in commercial fish catches in Lake Mamry Północne (northeastern Poland) on the background of physical, chemical, and biological data von Wołos, Arkadiusz (Department of Fisheries Bioeconomics, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Oczapowskiego 10, 10-719 Olsztyn, Poland), Zdanowski, Bogusław (Departament of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland), Wierzchowska, Małgorzata (Departament of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland)

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Changes in the trophic state of Lake Niegocin based on physical, chemical, biological, and commercial fisheries data von Wołos, Arkadiusz (Department of Fisheries Bioeconomics, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Oczapowskiego 10, 10-719 Olsztyn, Poland), Zdanowski, Bogusław (Departament of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland), Wierzchowska, Małgorzata (Departament of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland)

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Assessing angling catches in dam reservoirs on the example of Zegrze Dam Reservoir von Wisniewolski, Wieslaw, Wolos, Arkadiusz, Borzecka, Irena

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Impact of diets supplemented with rapeseed, soy, and sunflower oils on growth rates and the histological picture of the livers of juvenile pikeperch, Sander lucioperca (L.) von Zakęś, Zdzisław (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Demska-Zakęś, Krystyna (Department of Ichthyology, University of Warmia and Mazury in Olsztyn, Poland), Kowalska, Agata (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Hancz, Csaba (Faculty of Animal Science, Kaposvár University, Kaposvár, Hungary), Jarmołowicz, Sylwia (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland)

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Changes in the zoobenthos structure in a system of heated lakes in central Poland von Ciemiński, Jarosław (Department of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn ul. Oczapowskiego 10, 10-718 Olsztyn, Poland), Zdanowski, Bogusław (Department of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn ul. Oczapowskiego 10, 10-718 Olsztyn, Poland)

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Management of fish populations in lobelia lakes in the vicinity of Bytów (northern Poland) von Morzuch, Jacek (Department of Ichthyology, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland), Kapusta, Andrzej (Department of Ichthyology, The Stanisław Sakowicz Inland Fisheries Institute in Olsztyn, Oczapowskiego str. 10, 10-719 Olsztyn-Kortowo, Poland)

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Effectiveness of rearing juvenile pikeperch Sander lucioperca (L.), fed feeds supplemented with fish oil, linseed oil, or peanut oil von Kowalska, Agata (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Oczapowskiego 10, 10-719 Olsztyn, Poland), Zakęœ, Zdzisław (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Oczapowskiego 10, 10-719 Olsztyn, Poland)

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RESONANCE-TYPE SMOOTHENING DEVICE FOR A RAILWAY TRACTION SUBSTATION WITH RECTIFIER UNITS von SZYMANSKA ELZBIETA, DURKA ANDRZEJ, KORZYCKI EUGENIUSZ, SAKOWICZ STANISLAW, MALIK STEFAN

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Controlled reproduction of pikeperch Sander lucioperca (L.): a review von Zakęś, Zdzisław (Department of Aquaculture, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Oczapowskiego 10, 10-719 Olsztyn, Poland), Demska-Zakęś, Krystyna (Department of Ichthyology, University of Warmia and Mazury, Olsztyn, Poland)

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Zooplankton structure in heated lakes with differing thermal regimes and water retention von Tunowski, Jacek (Department of Hydrobiology, The Stanisław Sakowicz Inland Fisheries Institute, Olsztyn Oczapowskiego 10, 10-719 Olsztyn, Poland)

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CIRCUIT FOR TESTING POWER TRANSISTORS FOR THEIR ENDURANCE von SWIATEK HENRYK, SERAFIN STANISLAW, CZAJKOWSKI STANISLAW, PYTLAK ANDRZEJ, SWIATEK GRZEGORZ, SAKOWICZ STANISLAW, HANCZEWSKI WITOLD

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