Overview of the fish fauna of the Chaunskaya basin – the area of the natural reserve "Chaunskaya Guba" and the port of Pevek (East Siberian Arctic)

The fishes of the Chaunskaya Bay and its Basin have been little studied. Part coast this vast Arctic estuary (about 9 thousand km2) is included in state nature reserve “Chaunskaya Guba”; at entrance to bay there seaport Pevek, a transit hub Northern Sea Route. area has identified as one priorities for protection biodiversity seas Russian Arctic. Solving problem biota conservation begins with an inventory fauna. paper presents results summarizing data on species composition marine, anadromous freshwater basin. updated list includes 36 28 genera, 16 families 10 orders. In marine waters are 31 (18 13 semi-anadromous fish), rivers lakes 5 (and semi-anadromous) species. Muksun Coregonus muksun (Pallas, 1814) pike Esox lucius Linnaeus, 1758, which were absent fauna lists, added. lamprey Lethenteron kessleri (Anikin, 1905), Pacific herring Clupea pallasii Valenciennes, 1847, charr Salvelinus alpinus (Linnaeus, 1758), previously recorded, not confirmed by reliable findings. fish community impoverished shelf East Siberian adapted desalination. ichthyofauna basin differs from neighboring Kolyma River region loss number species, believed extinct because Holocene cooling. A significant part complex consists elements North that spread postglacial period.