The first record of Piscicola pojmanskae Bielecki, 1994 in the Gulf of Gdańsk (the southern Baltic Sea) with species characteristics distinguishing it from Piscicola geometra (Linnaeus, 1758)
Kendzierska, Halina, Dąbrowska, Anna, Cichocka, Joanna, Janas, Urszula, Bielecki, Aleksander
Atlantic sturgeon, Acipenser oxyrinchus Mitchill, infected by the parasitic leech, Caspiobdella fadejewi (Epshtein) (Hirudinea; Piscicolidae), in the Drwęca River
Bielecki, Aleksander, Kapusta, Andrzej, Cichocka, Joanna
Leeches (Clitellata: Hirudinida) of an upland stream: taxonomic composition in relation to habitat conditions
Cichocka, Joanna, Jabłońska-Barna, Izabela, Bielecki, Aleksander, Buczyńska, Edyta, Buczyński, Paweł, Stryjecki, Robert, Pikuła, Dorota
Location and development of larvae of Contracaecum rudolphii Hartwich, 1964 (Nematoda: Anisakidae) in experimentally infected asps Leuciscus aspius (Linnaeus, 1758) (Pisces: Cyprinidae)
Dziekońska-Rynko, Janina, Rokicki, Jerzy, Mierzejewska, Katarzyna, Wziątek, Bogdan, Bielecki, Aleksander