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The presently reported finding of leopard pleco, Pterygoplichthys gibbiceps (Kner, 1854) (Loricariidae), in open waters of the Brda River in the centre of Bydgoszcz, constitutes the first record of a south-American loricariid fish species in Poland. The specimen found is described and illustrated. The finding is discussed in association with other alien species sightings in Poland. The described leopard...
Background. The gudgeon is a small fish of limited economic importance. Species of the genus Gobio bear a strong superficial resemblance to one each other, what has led to the misidentification of Central European gudgeons for many years. Consequently, accurate information about Polish populations of gudgeon is still scarce and more studies are needed to fill this gap. The purpose of the presently...
A total of 142 individuals of Gasterosteus aculeatus L. and 22 individuals of Pungitius pungitius (L.) from several areas of the coastal waters of the Gdańsk Bay both brackish- and freshwater were examined for parasites. The survey was carried out within 1988-1991. Six parasite species, namely: Gyrodactylus arcuatus, Apatemon gracilis, Sphaerostomum bramae, Phyllodistomum folium, Neoechinorhynchus...
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