PRESENT STATE OF WHITE SALMON IN THE BASIN OF THE SEVERNAYA SOSVA RIVER
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2013, Vol 0, Issue 3
Abstract
The question of belonging of white salmon in the basin of the Severnaya Sosva River to the semi-anadromous form is considered. Based on the long-term research material (1997–2012) using conventional ichthyological techniques, the age, size, weight and sex structure of the spawning stock are defined. There is evidence of change in these indicators from the middle of the XXth century. The effect of hydromechanized works at a gas pipeline in the Taz Bay on fish migration is shown. The conclusion about sustainable reduction of the amount of spawning herd, its rejuvenation, the reduction of the age range and prevalence of the first maturing individuals is made. This is due to overfishing. For reproduction of white salmon the ultimate prohibition of the catch of white salmon on migration routes and in the spawning and overwintering places is required.
Authors and Affiliations
Bogdanov Dmitrievich , Melnichenko Pavlovna
Keywords
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