Articles

• Reproductive traits and their effects on embryos and larvae of vendace, Coregonus albula L. Part I. Fish and gonad attributes

  H. Wilkońska, H. Żuromska, B. Jezierska, T. Backiel

  79 -100

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• Present situation of the Vistula sea trout

  R. Bartel

  101-111

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• Effects of different fat level in feeds upon some culture indices of african catfish (Clarias gariepi-nus) reared in cages in cooling water

  J. Filipiak, R. Trzebiatowski, J. Sadowski

  113-123

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• Environmental and trophic conditions in Lake Pogubię Wielkie after disappearance of submerged vegetation

  A. Hutorowicz, B. Zdanowski

  125 -143

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• Parasitic Trichodinidae in salmonid fish cultured in Polish ponds

  K. Migała

  145 -159

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• Model studies on a recirculation system with a rotating biological filter for fish fattening Part I. Preliminary model studies on the rotating drum filter

  R. Kolman

  161 -166

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• Model studies on a recirculation system with a rotating biological filter for fish fattening Part II. Model studies of a biological drum filter cooperating with a mechanical filter

  Ryszard Kolman

  167-176

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• Diel cycle of pike (Esox lucius L.) larvae feeding in conditions of pond rearing. An attempt of estimation of daily food rations

  J. Pyka

  177-186

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• Long-term changes in the composition and biomass of the phytoplankton in Lake Niegocin (Great Mazurian Lakes, Poland)

  W. Krzywosz

  187-203

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