title: Abundance and distribution of the Caspian seals on ice in the Russian part of the Northern Caspian in February — March 2023
abstract: The aim of this research was to assess the current abundance of the Caspian seal population on ice in the Russian part of the North Caspian using instrumental methods of aerial survey in the infrared and optical ranges using a manned aircraft and UAV. The main method of the research was a multispectral aerial survey, the essence of which is to survey seal haulouts synchronously in the infrared and optical ranges. In winter, 90% of all mature individuals gather on the ice substrate of the Norther
journal: Trudy VNIRO