Hydraulic Conditions of Flood Wave Propagation in the Valley of the Narew River after the Siemianówka Dam Overtopping Failure

The history of the Atlantic sturgeon, Acipenser oxyrinchus Mitchill, 1815, in the Warta River of Central and Western Poland in the nineteenth century based on Polish sources

“…Similar information from Poznañ in 1870 could indicate the catch was poor in this year, too, and reports from the cities of Pi³a in 1858 and Kalisz in 1871 also prove this point. Similar instances reported in Poland refer to the Narew River (only a few fish are on record in the nineteenth century) in which a large sturgeon was caught in 1866 and was then put on display in the city of £om¿a (Kurp 1870), the Niemen (Nemunas) River from which a fish measuring 2.75 m was caught and then displayed in the city of Grodno (Anonymous 1927), and the Vistula River in P³ock (Anonymous 1934) when sturgeon was rare in this period. The fact that in 1810 a sturgeon was bought by a prefect and other accounts from 1842 and 1851 indicate the special role of sturgeon in Poznañ at that time because of its rarity.…”