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Wydobycie kruszyw żwirowo-piaskowych w Polsce Północno-Zachodniej

Kozioł Wiesław

Kruszywa : produkcja - transport - zastosowanie

2019

Nr 4

24--29

Żwiry i piaski są podstawową kopaliną stosowaną w budownictwie do produkcji betonów, prefabrykatów betonowych i dróg, a także w wielu innych gałęziach gospodarki. Złoża żwirów i piasków zalegają na stosunkowo niedużych głębokościach na terenie całego kraju i są eksploatowane we wszystkich województwach oraz w Bałtyckim Obszarze Morskim. Z analizy bazy geologicznej wynika, że w ostatnich latach pomimo eksploatacji przybywa udokumentowanych zasobów.

Gravel and sand are basic minerals used in construction for the production of concretes, concrete prefabricated elements and roads as well as in many economic sectors. The deposit of gravel and sand occur at relatively depths all over Poland and are mined in all voivodeships at the Baltic Sea area. An analysis of the geological database has shown that the amount of documented resources has grown in recent years despite their mining.

Parasitological survey of smelt, Osmerus eperlanus (Actinopterygii: Osmeridae), from five estuary sites along the southern coast of the Baltic Sea

Pilecka-Rapacz M., Piasecki W., Głoćko M., Kesminas V., Domagała J., Wiśniewski G., Czerniawski R.

Oceanological and Hydrobiological Studies

2017

Vol. 46, No. 3

314--324

This is the first comprehensive study covering the parasite fauna of smelt, Osmerus eperlanus, from five estuary sites of the southern Baltic Sea in a stretch of almost 500 km. We examined 432 smelt from: the Neman River mouth, the Vistula River mouth, Pomeranian Bay, the Oder River, and Lake Dąbie and recovered 13 species/higher-rank taxa of parasites: Diplostomum spp., Posthodiplostomum cuticola, Eubothrium crassum, Proteocephalus longicolis, Cystidicola farionis, Hysterothylacium aduncum, Corynosoma semerme, Pomphorhynchus laevis, Unionidae gen sp., Ergasilus sieboldi, Argulus foliaceus, Piscicola geometra, and Saprolegniaceae gen sp. Basic infection parameters such as prevalence, intensity of infection, mean intensity of infection, and the dominance index were determined. The findings of the presently reported study constitute a number of new faunistic records. There were two new host records (Posthodiplostomum cuticola and Saprolegniaceae gen sp.), five new host records for Poland (Diplostomum spp., Pomphorhynchus laevis, Piscicola geometra, Argulus foliaceus, and Unionidae gen sp.), and two new host records for Lithuania (Argulus foliaceus and Unionidae gen sp.). We carefully analyzed the relevant information from more than 100 publications on smelt parasites to compare the data with our own findings.