Supporting the process of fish reproduction in the event of an ecological disaster, securing the stability of breeding in fish hatcheries and protecting the gene pool - these are the main objectives of fish semen banks, which are being established by scientists from the Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences in Olsztyn.
Road salt used in winter has a negative impact on zooplankton, preventing its spring reproduction success, shows Dr. Sebastian Szklarek, an ecohydrologist from the Polish Academy of Sciences. Less zooplankton affects the phytoplankton balance and thus, among other things, a larger bloom of cyanobacteria.
Four plesiosaur teeth from about 148 million years ago have been discovered by scientists from the Jagiellonian University and the Polish Academy of Sciences in the Owadów-Brzezinki quarry (near Sławno, Łódź province). According to the researchers, these are the first fossils of the aquatic reptiles from this palaeontological site.