Fish play an important role in water ecosystems. In protected areas, such as national parks, the principal objectives are to study and preserve the integrity of natural systems. Studies were carried out in 2002-2006 in the Postomia River within the “Ujście Warty” (translated as the Warta Mouth) National Park. Four contrasting sites characterized by different habitats were sampled for fish. Fish were caught by electrofishing from a boat along a river bank over a distance of 500 m. Analysis of the ichthyofauna was conducted using biocenotic indexes: dominance in abundance, dominance in biomass and frequency of occurrence. Fish species were also analysed in terms of their affiliation to ecological groups, habitat preferences, threat categories and protection status. The dominant species by number included roach, white bream, pike and perch, while the highest biomass was provided by pike, ide, gibel carp and tench. A comparison of the recorded results with earlier data indicated that the ichthyofauna of the Postomia River is currently represented by a greater number of species, which is partly the result of the appearance of aquaculture species, e.g. gibel carp. Another factor which contributes to differences in the fish fauna in the Postomia River is associated with migration of fish from the Warta and Oder Rivers, particularly during the seasonal flooding of these rivers.
|MLA||Andrzejewski, Wojciech, et al. "Ichthyofauna of the Postomia River within the “Ujście Warty” National Park (western Poland)." Nauka Przyr. Technol. 6.3 (2012): #52.|
|APA||Wojciech Andrzejewski, Jan Mazurkiewicz, Antoni Przybył, Janusz Golski, Katarzyna Przybylska (2012). Ichthyofauna of the Postomia River within the “Ujście Warty” National Park (western Poland). Nauka Przyr. Technol. 6 (3), #52|
|ISO 690||ANDRZEJEWSKI, Wojciech, et al. Ichthyofauna of the Postomia River within the “Ujście Warty” National Park (western Poland). Nauka Przyr. Technol., 2012, 6.3: #52.|
Uniwersytet Przyrodniczy w Poznaniu
ul. Wojska Polskiego 71 C