Spawning areas typology according to hydrological, hydrochemical and geomorphological elements of pacific salmon different species (Oncorhynchus genus)
By the example of Kamchatka Region, where the most intensive reproduction of all the six Oncorhynchus pacific salmon species has been observed, there are fixed the main types of spawning areas and interspecific differences of salmon reproduction according to the combination of abiotic conditions. Data classification based on thermic and oxygenic conditions, hydrology and hydrochemistry specifics and geomorphological localization is given for different types of spawning areas.