E3S Web Conf.
Volume 320, 2021Energy Systems Environmental Impacts (ESEI 2021)
|Number of page(s)||6|
|Section||Hydroelectric and Energy Machines Impact on Ecosystem|
|Published online||09 November 2021|
About Effect of Hydroelectric Construction on Some Features of Fish Biology
Far Eastern State Technical Fisheries University, Engineering Disciplines Department, 52 B Lugovaya Str., Vladivostok 690087, Russia
* Corresponding author: Matrosova.IV@dgtru.ru
Restructures in the communities of hydrobionts take place for the rivers with abrupt changes in hydrography and hydrological regime, as a result of flow regulation. They require long-term monitoring to develop preventive measures to avoid negative consequences and to restore the river ecosystem. Some biological characteristics of the broad whitefish (Coregonus nasus) have been studied during spawning migration in the upper reaches of the Yenisei River. The limiting values of the fish length were higher in 2016, and the average - in 2013. In 2013, the sampling frame consisted of fish of 51-55 cm in size, in 2014 and 2016. - 41-45 cm. In 2013, most of the fish in the catches were aged from 6+ to 11+ years, in 2014 - from 8+ to 10+ years, in 2016 from 8+ to 11+ years. The gender ratio was close to 1:1; most of the individuals had gonads at maturity stage III.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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