Name
Tyaptirgyanov Matvey Matveevich
Scholastic degree
•
Academic rank
associated professor
Honorary rank
—
Organization, job position
Institute of Natural Sciences, North-Eastern Federal Universit
Web site url
—
Articles count: 4
Humpback whitefish - Coregonus lavaretus pidschian
(Gmelin, 1788), is spread in Siberia, in the Kara,
Laptev and East Siberian seas and in the lakes of the
Arctic and Subarctic. Objective: To assess the status of
fish in the waters of Yakutia, to make ecological
forecasts and determine the possibility and prospect of
economic use of whitefish, as a fish-breeding material
in the present conditions. Methods: The analysis was
carried out on the fresh material as described
I.Pravdina (1966), taking into account the
recommendations of Y. Reshetnikov (1980).
Collection and processing of materials were carried out
in 1969-2015 by standard methods. Results. Reaching
sexual maturity at the sixth (in weight - the eighth and
ninth) year of life, whitefish begin to move to the main
breeding groundsin the early fall. Absolute fecundity
of eggs 2500-140000. Spawning is common in late
September-early October. The food spectrum usually
consists of the following objects: chironomid larvae,
plants, mollusks, fish eggs and copepods. By the
nature of power - benthophage, but often becomes
planktonic organisms. Conclusions. Important food
fish, but its reserves significantly reducedunder the
influence of anthropogenic factors in recent years. The
catch of whitefish can be increased as a result of the
development of aquaculture
The article presents a biological characteristic of
burbots in the waters of Yakutia. We discuss the most
essential features of the ecology of this fish
Pike inhabits almost all the rivers of the Yakutia
system. It is more widespread in the lakes of YanoIndigirka
and Kolyma lowlands. Objective: To provide
a modern assessment of fish in the main model
reservoirs, create an ecological prognosis and the
possibility of their use in modern conditions. Methods.
The material was collected in the conditions of
anthropogenic pollution. Full general biological
analysis was conducted for the fish. Cruise studies
were conducted covering the northern territories - r.
Anabar, Olenek, Lena, Yana, Indigirka, Kolyma and
Chrome, as well as Vilyuy Dam, from 1969 to 2016.
We used the standard ichthyologic methods of
selection and processing of the collected material.
Results. Because of climate warming, there were
reported pike approaches in the lower reaches of the
river Lena, Yana and Kolyma. Maximum dimensions
were noted earlier in the lower reaches of the river
Lena, where the maximum weight of pike was 18 kg.
The fecundity of 16-211 thousand eggs. It was
revealed, that the catch was better for young pike.
Conclusions. Stocks of pike are in satisfactory
condition, and its reserves are proposed to be
increased, at the expense of unused areas (lakes
Kolymo- Indigirka lowland) up to 220 m. It is
proposed as a fish-breeding facility in Yakutia
reservoirs
Numerous revealed negative impacts of the diamond
industry and Vilyuiskaya HPP on the aquatic
environment and biological objects are more expressed
in the change of the hydrochemical regime in water
basin of Viluy and as its consequence - in violation of
the structural and functional nature of the components
of aquatic biota; in the change of he average biomass
and abundance of planktonic populations
(phytoplankton and zooplankton) and benthic
organisms, and in general - in the change of the flow
energy in an aquatic ecosystem